Severe Weather of December 15, 2021 - Strong Winds & Tornadoes

Tornadoes:

Tornado - SOUTH of MARBLE ROCK BUTLER/FLOYD COUNTIES, IA Date Dec 15, 2021 Time (Local) 6:53-6:57 PM CST EF Rating EF-1 Est. Peak Winds 90 mph Path Length 4.2 miles Max Width 200 yards Injuries/Deaths 0 / 0 Summary: This tornado crossed from Butler Co. into rural Floyd Co. southwest of Marble Rock. Damage was mainly to trees. Track Map Downloadable KMZ File

Tornado - MARBLE ROCK FLOYD COUNTY, IA Date Dec 15, 2021 Time (Local) 6:59-7:04 PM CST EF Rating EF-1 Est. Peak Winds 110 mph Path Length 6.7 miles Max Width 80 yards Injuries/Deaths 0 / 0 Summary: A fairly long tornado track moved through mainly rural Floyd County Iowa hitting numerous farms and a few homes. Many outbuildings suffered damage, power lines were damaged or snapped, and numerous trees were blown over from the fast moving tornado. Track Map Downloadable KMZ File

Tornado - RUDD FLOYD COUNTY, IA Date Dec 15, 2021 Time (Local) 7:06 - 7:08 PM CST EF Rating EF-1 Est. Peak Winds 110 mph Path Length 1.8 miles Max Width 65 yards Injuries/Deaths 0 / 0 Summary: A tornado went through the middle of Rudd Iowa knocking down power lines, damaging trees, and ripping roofs off some homes. The roof was blown off the library in town and a church sustained major damage. Track Map Downloadable KMZ File

Tornado - SE LONDON MN FREEBORN/MOWER COUNTIES, MN Date Dec 15, 2021 Time (Local) 7:10-7:12 PM CST EF Rating EF-0 Est. Peak Winds 80 mph Path Length 2.6 miles Max Width 50 yards Injuries/Deaths 0 / 0 Summary: This small tornado originally formed in Worth Co., IA.  It moved into southern Minnesota destroying an empty silo before damaging trees as it moved into rural Mower County. Track Map Downloadable KMZ File

Tornado - NORTH WASHINGTON CHICKASAW COUNTY, IA Date Dec 15, 2021 Time (Local) 7:15-7:18 PM CST EF Rating EF-1 Est. Peak Winds 95 mph Path Length 4.0 miles Max Width 180 yards Injuries/Deaths 0 / 0 Summary: This tornado damaged trees and outbuildings at several farms in rural Chickasaw Co. Track Map Downloadable KMZ File

Tornado - ELMA CHICKASAW/HOWARD COUNTIES, IA Date Dec 15, 2021 Time (Local) 7:17-7:22 PM CST EF Rating EF-0 Est. Peak Winds 85 mph Path Length 5.0 miles Max Width 50 yards Injuries/Deaths 0 / 0 Summary: This fast moving tornado damaged farm equipment and trees. Track Map Downloadable KMZ File

Tornado - MAPLE LEAF HOWARD COUNTY, IA Date Dec 15, 2021 Time (Local) 7:23-7:28 PM CST EF Rating EF-0 Est. Peak Winds 85 mph Path Length 5.9 miles Max Width 45 yards Injuries/Deaths 0 / 0 Summary: Damage to numerous outbuildings and farms was noted. Track Map Downloadable KMZ File

Tornado - SCHLEY HOWARD COUNTY, IA Date Dec 15, 2021 Time (Local) 7:29-7:32 PM CST EF Rating EF-0 Est. Peak Winds 85 mph Path Length 4.5 miles Max Width 45 yards Injuries/Deaths 0 / 0 Summary: This tornado damaged trees and several outbuildings. A hog farm roof was completely blown off. Track Map Downloadable KMZ File

Tornado - CRESCO HOWARD COUNTY, IA Date Dec 15, 2021 Time (Local) 7:31-7:35 PM CST EF Rating EF-0 Est. Peak Winds 80 mph Path Length 4.6 miles Max Width 90 yards Injuries/Deaths 0 / 0 Summary: This tornado impacted rural areas west and southwest of Cresco. Track Map Downloadable KMZ File

Tornado - RACINE MOWER COUNTY, MN Date Dec 15, 2021 Time (Local) 7:37-7:40 PM CST EF Rating EF-1 Est. Peak Winds 110 mph Path Length 3.3 miles Max Width 85 yards Injuries/Deaths 0 / 0 Summary: This tornado destroyed farm buildings, snapped numerous trees, and lifted a roof off a house with the most substantial damage being located south southwest of Racine, MN.  Track Map Downloadable KMZ File

Tornado - SUMNER FILLMORE COUNTY, MN Date Dec 15, 2021 Time (Local) 7:42-7:46 PM CST EF Rating EF-0 Est. Peak Winds 85 mph Path Length 4.6 miles Max Width 80 yards Injuries/Deaths 0 / 0 Summary: Damage to several trees, farms, outbuildings, and sheds was sustained when an EF-0 tornado tracked through rural northwest Fillmore County. Track Map Downloadable KMZ File

Tornado - PRESTON FILLMORE COUNTY, MN Date Dec 15, 2021 Time (Local) 7:48-7:49 PM CST EF Rating EF-0 Est. Peak Winds 80 mph Path Length 0.5 miles Max Width 40 yards Injuries/Deaths 0 / 0 Summary: A tornado tracked through Preston, MN damaging cars and sheds while snapping numerous trees.  Track Map Downloadable KMZ File

Tornado - WEST CONCORD DODGE/GOODHUE COUNTIES, MN Date Dec 15, 2021 Time (Local) 7:50-7:53 PM CST EF Rating EF-1 Est. Peak Winds 100 mph Path Length 4.5 miles Max Width 75 yards Injuries/Deaths 0 / 0 Summary: This tornado formed in extreme northern Dodge Co., MN and tracked into neighboring Goodhue Co.  Damage in Dodge Co. was primarily to trees.  Track Map Downloadable KMZ File

Tornado - CARROLTON FILLMORE COUNTY, MN Date Dec 15, 2021 Time (Local) 7:51-7:53 PM CST EF Rating EF-1 Est. Peak Winds 105 mph Path Length 1.8 miles Max Width 75 yards Injuries/Deaths 0 / 0 Summary: The tornado began in northeast Preston and moved northeast into Carrolton Township. Numerous trees were damaged, along with extensive damage to farm buildings.  Track Map Downloadable KMZ File

Tornado - ARENDAHL FILLMORE COUNTY, MN Date Dec 15, 2021 Time (Local) 8:01-8:02 PM CST EF Rating EF-1 Est. Peak Winds 95 mph Path Length 1.2 miles Max Width 250 yards Injuries/Deaths 0 / 0 Summary: This brief tornado formed just south of Arendahl and tracked to the east of the town hall, heavily damaging a grove of trees. The tornado weakened quickly north of this location and dissipated before reaching County Highway 25. Track Map Downloadable KMZ File

Tornado - RUSHFORD VILLAGE FILLMORE COUNTY, MN Date Dec 15, 2021 Time (Local) 8:02-8:04 PM CST EF Rating EF-1 Est. Peak Winds 90 mph Path Length 2.4 miles Max Width 75 yards Injuries/Deaths 0 / 0 Summary: This tornado destroyed 2 farm buildings and damaged numerous trees.   Track Map Downloadable KMZ File

Tornado - PLAINVIEW AREA WABASHA COUNTY, MN Date Dec 15, 2021 Time (Local) 8:03-8:07 PM CST EF Rating EF-1 Est. Peak Winds 93 mph Path Length 4.0 miles Max Width 40 yards Injuries/Deaths 0 / 0 Summary: Damage was noted to mainly trees, but several farm buildings and sheds were damage or had the roof peeled up. Track Map Downloadable KMZ File

Tornado - MONEY CREEK HOUSTON COUNTY, MN Date Dec 15, 2021 Time (Local) 8:06-8:11 PM CST EF Rating EF-1 Est. Peak Winds 90 mph Path Length 7.4 miles Max Width 250 yards Injuries/Deaths 0 / 0 Summary: Summary to come. Track Map Downloadable KMZ File

Tornado - WYATTVILLE WINONA COUNTY, MN Date Dec 15, 2021 Time (Local) 8:10-8:11 PM CST EF Rating EF-0 Est. Peak Winds 85 mph Path Length 0.6 miles Max Width 40 yards Injuries/Deaths 0 / 0 Summary: Damage was noted to trees, a garage, and several outbuildings along and near County Road 23 between Lewiston and Wyattville. Track Map Downloadable KMZ File

Tornado - HOMER WINONA COUNTY, MN Date Dec 15, 2021 Time (Local) 8:17-8:19 PM CST EF Rating EF-1 Est. Peak Winds 100 mph Path Length 2.4 miles Max Width 40 yards Injuries/Deaths 0 / 0 Summary: A tornado tracked from the ridgetop area west-northwest of Pickwick, northeast across Homer and into the Mississippi River. The track started near the intersection of Pleasant Ridge Road and Government Point Road and consisted of mainly damaged trees and a few outbuildings. A narrow path cut through hardwoods to the northeast, where one stand of hardwoods was more severely damaged. This is where the tornado appeared to be the strongest. From there, the tornado produced sporadic tree damage in the high EF-0/low EF-1 category through Homer, ending on an island in the Mississippi River.  Track Map Downloadable KMZ File

Tornado - TREMPEALEAU TREMPEALEAU, WI Date Dec 15, 2021 Time (Local) 8:23-8:24 PM CST EF Rating EF-0 Est. Peak Winds 75 mph Path Length 0.7 miles Max Width 25 yards Injuries/Deaths 0 / 0 Summary: A tornado caused property damage to many homes including trees that fell on four houses in a row on Seward St. It also snapped numerous trees in a wooded area.   Track Map Downloadable KMZ File

Tornado - LEVIS TREMPEALEAU/JACKSON COUNTY, WI Date Dec 15, 2021 Time (Local) 8:53-8:55 PM CST EF Rating EF-1 Est. Peak Winds 100 mph Path Length 2.7 miles Max Width 70 yards Injuries/Deaths 0 / 0 Summary: The tornado began near the intersection of Isom and Thorson Roads in far northeastern Trempealeau County with light tree damage. The tornado intensified as it moved northeast, downing more trees in a clear path. This path went through a farm, damaged outbuildings and minor damage occurred to a house. It continued to cut through trees on County G, brushing a home which was not affected. The tornado ended near Interstate 94 where trees were damaged on county FF.  Track Map Downloadable KMZ File

Tornado - HEWETT TOWNSHIP CLARK COUNTY, WI Date Dec 15, 2021 Time (Local) 9:06-9:08 PM CST EF Rating EF-2 Est. Peak Winds 115 mph Path Length 3.1 miles Max Width 250 yards Injuries/Deaths 0 / 0 Summary: This tornado tracked through rural areas of southwest Clark County damaging trees. Track Map Downloadable KMZ File

Tornado - FIVEMILE CREEK CLARK COUNTY, WI Date Dec 15, 2021 Time (Local) 9:07-9:09 PM CST EF Rating EF-2 Est. Peak Winds 130 mph Path Length 2.8 miles Max Width 110 yards Injuries/Deaths 0 / 0 Summary: A short, intense tornado struck rural areas of southwest Clark County, Wisconsin south of Highway 10. The tornado mainly tracked through wooded areas but destroyed a home near Fivemile Creek just off of Sand Road, then traveled through rural land before lifting near Highway 10. Other wind damage was noted in the area, including the Snyder County Park area and northeast towards the community of Globe or HOG corners. Numerous trees were snapped or blown over. Power lines and poles were also blown over that led to the closing of County Road H west of Globe for a time. Track Map Downloadable KMZ File

Tornado - STANLEY AREA CLARK COUNTY, WI Date Dec 15, 2021 Time (Local) 9:16-9:23 PM CST EF Rating EF-2 Est. Peak Winds 120 mph Path Length 7.44 miles Max Width 75 yards Injuries/Deaths 0 / 0 Summary: An intense tornado touched down near the intersection of County Highway G and 40th Ave. in southeast Chippewa County at 9:15 pm CST. It traveled northeast through Stanley, WI before crossing into our forecast area in Clark County. Many farm buildings were damaged or destroyed, trees were uprooted, and roofs sustained major damage. Track Map Downloadable KMZ File

Tornado - CHRISTE CLARK COUNTY, WI Date Dec 15, 2021 Time (Local) 9:16-9:18 PM CST EF Rating EF-2 Est. Peak Winds 120 mph Path Length 1.1 miles Max Width 50 yards Injuries/Deaths 0 / 0 Summary: A short but intense tornado touched down just west of Highway 73 north of Neillsville striking a farm along the highway. Large sections of the roof were torn off, windows were broken, mud debris was splattered around the home, and the barn was shifted off the foundation. A truck in the farm lot was moved nearly 100 feet and trees were snapped or uprooted. The tornado weakened as it continued northeast crossing Highway 73 and lifting in a stand of trees. A resident at the damaged home said it struck at exactly 9:18 pm. Track Map Downloadable KMZ File

Tornado - GREENWOOD CLARK COUNTY, WI Date Dec 15, 2021 Time (Local) 9:22-9:23 PM CST EF Rating EF-1 Est. Peak Winds 95 mph Path Length 0.9 miles Max Width 50 yards Injuries/Deaths 0 / 0 Summary: A very brief tornado occurred at the intersection of County G and County O west of Greenwood. The tornado damaged trees, removed a roof of a barn, snapped a power pole and destroyed a pole shed. Hay was smattered on the east side of the remaining outbuilding which had roof damage. Track Map Downloadable KMZ File

The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:

EF0 Weak 65-85 mph	EF1 Moderate 86-110 mph	EF2 Significant 111-135 mph	EF3 Severe 136-165 mph	EF4 Extreme 166-200 mph	EF5 Catastrophic 200+ mph

Wind:

Peak Gusts Across Central US - 12/15/2021	Regional Peak Gusts - 12/15/2021	Regional Peak Gusts - 12/16/2021

• Widespread severe wind gusts occurred with a line of thunderstorms that progressed eastward through the area during the evening of 12/15/2021.
• Numerous significant wind gusts of 70+ mph were reported west of the Mississippi River, including a handful of destructive gusts of 80-85 mph.
• Rochester International Airport gusted to 77 mph both during the thunderstorms and also during the period of high winds that followed. This was the 2nd highest measured wind gust on record at RST; the only higher gust was 85 mph from 4/27/1984.
• La Crosse Regional Airport gusted to 68 mph during the period of high winds that followed the evening thunderstorms. This was the 2nd highest measured wind gust on record at LSE; the only higher gust was 78 mph from 3/30/1982.

Highest Thunderstorm Wind Gusts (≥50 mph): December 15, 2021

Location                     Speed     Time/Date       Lat/Lon              

...Iowa...

...Chickasaw County...
2 N Ionia                    63 MPH    0720 PM 12/15   43.07N/92.46W        

...Clayton County...
Littleport                   50 MPH    0830 PM 12/15   42.75N/91.37W        

...Floyd County...
Charles City Airport         55 MPH    0715 PM 12/15   43.07N/92.62W        

...Minnesota...

...Dodge County...
2 E Kasson                   72 MPH    0745 PM 12/15   44.02N/92.71W        
Dodge Center Airport         70 MPH    0742 PM 12/15   44.02N/92.84W        
Hayfield                     50 MPH    0733 PM 12/15   43.89N/92.85W        
3 S Claremont                50 MPH    0739 PM 12/15   44.00N/93.00W        

...Fillmore County...
Harmony                      84 MPH    0745 PM 12/15   43.55N/92.01W        
Mabel                        84 MPH    0758 PM 12/15   43.52N/91.77W        
7 N Mabel                    63 MPH    0800 PM 12/15   43.72N/91.77W

...Mower County...
3 S Grand Meadow             83 MPH    0733 PM 12/15   43.66N/92.57W        
Elkton                       79 MPH    0735 PM 12/15   43.66N/92.71W        
1 ENE Dexter                 73 MPH    0735 PM 12/15   43.73N/92.68W 
Austin Municipal Airport     60 MPH    0722 PM 12/15   43.67N/92.97W        
1 WSW Le Roy                 59 MPH    0729 PM 12/15   43.51N/92.53W        

...Olmsted County...
Rochester Int'l Airport      77 MPH    0745 PM 12/15   43.91N/92.50W        
2 SSE Eyota                  74 MPH    0800 PM 12/15   43.96N/92.21W 
Rochester                    60 MPH    0754 PM 12/15   44.01N/92.48W        
4 ESE Douglas                57 MPH    0756 PM 12/15   44.09N/92.49W

...Wabasha County...
Plainview                    85 MPH    0810 PM 12/15   44.17N/92.17W  *Area's Highest Reported Thunderstorm Gust      
1 SSE Kellogg                57 MPH    0820 PM 12/15   44.28N/91.99W 

...Winona County...
Saint Charles                52 MPH    0802 PM 12/15   43.97N/92.06W        

...Wisconsin...

...Buffalo County...
Buffalo                      50 MPH    0902 PM 12/15   44.23N/91.86W        

...Clark County...
Longwood                     70 MPH    0915 PM 12/15   44.89N/90.60W        

...Grant County...
Platteville Municipal Airpor 68 MPH    0955 PM 12/15   42.68N/90.43W        
Bagley                       63 MPH    0903 PM 12/15   42.90N/91.10W        
Dickeyville                  60 MPH    0934 PM 12/15   42.63N/90.59W   
Lancaster RAWS               59 MPH    0932 PM 12/15   42.83N/90.69W     
Boscobel Airport             51 MPH    0928 PM 12/15   43.16N/90.68W
Blue River                   50 MPH    0915 PM 12/15   43.19N/90.57W        
Lancaster                    50 MPH    0920 PM 12/15   42.85N/90.71W        

...La Crosse County...
La Crosse Regional Airport   54 MPH    0831 PM 12/15   43.87N/91.26W        

...Monroe County... 
Sparta/Fort McCoy Airport    56 MPH    0912 PM 12/15   43.97N/90.73W 

...Richland County...
Lone Rock                    66 MPH    1002 PM 12/15   43.18N/90.20W        
2 N Viola                    62 MPH    0932 PM 12/15   43.54N/90.67W        

...Trempealeau County...
2 E Marshland                65 MPH    0826 PM 12/15   44.07N/91.51W        

...Vernon County...
Viroqua Municipal Airport    69 MPH    0915 PM 12/15   43.56N/90.89W        
5 S Viroqua                  62 MPH    0915 PM 12/15   43.49N/90.89W        

Observations are collected from a variety of sources with varying
equipment and exposures. We thank all volunteer weather observers 
for their dedication. Not all data listed are considered official.

Highest Non-Thunderstorm Wind Gusts (≥50 mph): December 15-16, 2021

Location                     Speed     Time/Date       Lat/Lon              

...Iowa...

...Chickasaw County...
2 N Ionia                    63 MPH    1100 PM 12/15   43.07N/92.46W        

...Fayette County...
Oelwein Municipal Airport    60 MPH    1135 PM 12/15   42.68N/91.97W        

...Floyd County...
Charles City Airport         61 MPH    1055 PM 12/15   43.07N/92.62W        

...Winneshiek County...
5 NW Frankville              58 MPH    0120 AM 12/16   43.25N/91.70W        
Decorah Municipal Airport    51 MPH    1235 AM 12/16   43.27N/91.72W        

...Minnesota...

...Dodge County...
2 E Kasson                   67 MPH    1150 PM 12/15   44.02N/92.71W 
Dodge Center Airport         58 MPH    0135 AM 12/16   44.02N/92.82W        

...Fillmore County...
Preston Airport              60 MPH    1135 PM 12/15   43.68N/92.17W        

...Mower County...
Austin Municipal Airport     58 MPH    1115 PM 12/15   43.67N/92.92W        
1 ENE Dexter                 58 MPH    1130 PM 12/15   43.73N/92.68W 

...Olmsted County...
Rochester Int'l Airport      77 MPH    1125 PM 12/15   43.90N/92.50W  *Area's Highest Reported Non-Thunderstorm Gust
2 NNE Rochester              67 MPH    1030 PM 12/15   44.04N/92.46W        
2 SSE Eyota                  66 MPH    1145 PM 12/15   43.96N/92.21W
3 N Stewartville             65 MPH    1205 AM 12/16   43.90N/92.48W  
Mayo Helipad                 61 MPH    1155 PM 12/15   44.02N/92.48W        
Rochester                    51 MPH    1125 PM 12/15   44.09N/92.49W        

...Wabasha County...
1 SSE Kellogg                63 MPH    1150 PM 12/15   44.28N/91.99W        
Lake City                    60 MPH    0145 AM 12/16   44.32N/92.44W        

...Winona County...
Winona Municipal Airport     52 MPH    1155 PM 12/15   44.07N/91.70W        

...Wisconsin...

...Grant County...
Platteville Municipal Airpor 60 MPH    0115 AM 12/16   42.68N/90.43W        
Boscobel Airport             58 MPH    1138 PM 12/15   43.15N/90.68W        
Lancaster RAWS               57 MPH    0141 AM 12/16   42.83N/90.69W        
4 WSW Lancaster              55 MPH    0100 AM 12/16   42.83N/90.79W        

...Juneau County...
Mauston Airport              58 MPH    1235 AM 12/16   43.83N/90.13W        
Necedah RAWS                 53 MPH    1248 AM 12/16   44.03N/90.08W        

...La Crosse County...
La Crosse Regional Airport   68 MPH    1236 AM 12/16   43.88N/91.25W    
La Crosse RAWS               57 MPH    0208 AM 12/16   43.82N/91.19W    
Onalaska                     55 MPH    1225 AM 12/16   43.89N/91.18W        
La Crosse                    53 MPH    0108 AM 12/16   43.82N/91.19W        
4 S La Crosse                51 MPH    0100 AM 12/16   43.77N/91.22W        

...Monroe County...
Sparta/Fort McCoy Airport    54 MPH    0224 AM 12/16   43.97N/90.73W

...Richland County... 
Lone Rock                    58 MPH    1018 PM 12/15   43.18N/90.20W 

...Taylor County...
Medford Airport              53 MPH    0215 AM 12/16   45.10N/90.30W       
Gilman                       51 MPH    0120 AM 12/16   45.17N/90.82W        

...Vernon County...
Viroqua Municipal Airport    62 MPH    1155 PM 12/15   43.58N/90.90W        

Observations are collected from a variety of sources with varying
equipment and exposures. We thank all volunteer weather observers 
for their dedication. Not all data listed are considered official.

Radar:

Reflectivity Radar Loop: 6 to 11 pm	Caption	Caption	Caption

Environment:

Surface Analysis Loop December 15-16, 2021	Regional Surface Analysis Loop December 15-16, 2021	925 Millibar Analysis December 15, 2021	850 Millibar Analysis December 15, 2021

700 Millibar Analysis December 15, 2021	500 Millibar Analysis December 15, 2021	300 Millibar Analysis December 15, 2021	250 Millibar Analysis December 15, 2021

Record-Breaking Warmth:

Regional High Temperatures (preliminary)	Regional Early Evening Dewpoints in 50s/60s Prior to Thunderstorms Arriving

• Unseasonably warm temperatures surged northward into the area on 12/15/2021, soaring well past previous records and continuing to climb even into the evening hours ahead of approaching thunderstorms!
• What snowpack still remained north of Interstate 90 to start the day (about 1 to 8" depth) virtually all melted away before evening thunderstorms arrived.
• Humidity climbed to unseasonably high levels with dewpoints reaching into the 50s to lower 60s, which actually made it feel a little muggy.
• La Crosse crushed its near-century old previous daily record high of 52° (1923), topping out at 69° at 8:29 PM CST!  This was also a new record  high for the all-time warmest December and meteorological winter (Dec-Feb) readings in La Crosse (previously 67° from 12/5/1998). 
• Rochester also smashed its long-standing daily record high of 52° (1910), topping out at 64 degrees!  This tied the record high for the all-time warmest December and meteorological winter (Dec-Feb) readings in Rochester (previously set on 12/4/2017). 
• The highly anomalous warmth and humidity (by mid-December standards) provided fuel for an incredibly rare early winter severe weather outbreak.

Additional Info:

Event Summaries from Other Area NWS Offices

• NWS Des Moines
• NWS Quad Cities
• NWS Twin Cities
• NWS Green Bay
• NWS Milwaukee

Photos:

Iowa

City of Rudd Library (Chris Nelson)	Rudd (NWS La Crosse)	Rudd (NWS La Crosse)	Rudd (NWS La Crosse)

Marble Rock (NWS La Crosse)	Marble Rock (NWS La Crosse)	Marble Rock (NWS La Crosse)	Marble Rock (NWS La Crosse)

Elma (NWS La Crosse)	Maple Leaf (NWS La Crosse)	Schley (NWS La Crosse)	Caption (source)

Caption (source)	Caption (source)	Caption (source)	Caption (source)

Minnesota

Grand Meadow (Ryan Knapp)	Plainview (Aaron White)	Wyattville (NWS La Crosse)	Wyattville (NWS La Crosse)

Caption (source)	Caption (source)	Caption (source)	Caption (source)

Wisconsin

Coral City (Trempealeau Co EM)	Wade Rd. Trempealeau Co. (Trempealeau Co EM)	La Crosse - Cass St. (Todd Rieck)	Caption (source)

Southwest of Neillsville (NWS La Crosse)	Southwest of Neillsville (NWS La Crosse)	Southwest of Neillsville (NWS La Crosse)	North of Neillsville (NWS La Crosse)

North of Neillsville, along Highway 73 (NWS La Crosse)	North of Neillsville, along Highway 73 (NWS La Crosse)	Caption (source)	Caption (source)

Storm Reports from Thunderstorms:

Regional Severe Weather Reports	Local Severe Weather Reports	Record Breaking Number of Significant Thunderstorm Gusts (courtesy SPC)

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LA CROSSE WI
427 AM CST THU DEC 16 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0700 PM     TSTM WND DMG     FLOYD                   43.12N 92.74W
12/15/2021                   FLOYD              IA   PUBLIC

            OVERTURNED SEMI-TRUCK TRAILER AT TRUCK STOP.

0700 PM     TSTM WND DMG     5 NNE MARBLE ROCK       43.03N 92.82W
12/15/2021                   FLOYD              IA   FIRE DEPT/RESCUE

            NUMEROUS REPORTS OF WIND DAMAGE TO HOUSES.

0700 PM     TSTM WND DMG     1 E RUDD                43.13N 92.89W
12/15/2021                   FLOYD              IA   FIRE DEPT/RESCUE

            ROOF ON HWY 27 NEAR PARK ENTRANCE.

0706 PM     TSTM WND DMG     1 SE MITCHELL           43.31N 92.85W
12/15/2021                   MITCHELL           IA   EMERGENCY MNGR

            REPORTS OF FLATTENED FARM BUILDINGS.

0709 PM     HAIL             CHARLES CITY            43.06N 92.67W
12/15/2021  E1.00 INCH       FLOYD              IA   FIRE DEPT/RESCUE

            NICKEL TO QUARTER SIZED HAIL REPORTED.

0715 PM     TSTM WND GST     3 E CHARLES CITY        43.07N 92.62W
12/15/2021  M55 MPH          FLOYD              IA   AWOS

            AWOS STATION KCCY CHARLES CITY AIRPORT.


0715 PM     TSTM WND DMG     RUDD                    43.13N 92.90W
12/15/2021                   FLOYD              IA   PUBLIC

            DAMAGE TO RAILROAD TRACKS.

0720 PM     TSTM WND GST     2 N IONIA               43.07N 92.46W
12/15/2021  M63 MPH          CHICKASAW          IA   MESONET

            IOWA DOT SENSOR.


0720 PM     TSTM WND DMG     1 N ELMA                43.26N 92.44W
12/15/2021                   HOWARD             IA   PUBLIC

            REPORT FROM MPING: TREES UPROOTED OR
            SNAPPED; ROOF BLOWN OFF.

0722 PM     TSTM WND GST     1 SE DODGE CENTER       44.02N 92.84W
12/15/2021  M70 MPH          DODGE              MN   PUBLIC
          

0722 PM     TSTM WND GST     2 ESE AUSTIN            43.67N 92.93W
12/15/2021  M60 MPH          MOWER              MN   AWOS

            AUTOMATED WEATHER OBSERVATION FROM THE
            AUSTIN AIRPORT.


0727 PM     TSTM WND DMG     ADAMS                   43.56N 92.72W
12/15/2021                   MOWER              MN   PUBLIC

            DAMAGE TO BARN/OUTBUILDING. REPORT VIA KAAL,
            TIMING BASED ON RADAR.

0729 PM     TSTM WND GST     1 W LE ROY              43.51N 92.53W
12/15/2021  E59 MPH          MOWER              MN   AMATEUR RADIO



0730 PM     TSTM WND DMG     4 WSW VERNON SPRINGS    43.33N 92.22W
12/15/2021                   HOWARD             IA   TRAINED SPOTTER

            MAJOR DAMAGE SUSTAINED BY LARGE OUTBUILDING
            SOUTHWEST OF CRESCO. ALSO MAJOR STRUCTURAL
            DAMAGE AT A NEARBY HOG FARM. TIME ESTIMATED
            FROM RADAR.

0733 PM     TSTM WND GST     3 S GRAND MEADOW        43.66N 92.57W
12/15/2021  M83 MPH          MOWER              MN   TRAINED SPOTTER



0733 PM     TSTM WND GST     HAYFIELD                43.89N 92.85W
12/15/2021  E50 MPH          DODGE              MN   EMERGENCY MNGR

            RELAYED FROM SPOTTERS.

0735 PM     TSTM WND GST     ELKTON                  43.66N 92.71W
12/15/2021  E79 MPH          MOWER              MN   BROADCAST MEDIA



0735 PM     TSTM WND GST     1 ENE DEXTER            43.73N 92.68W
12/15/2021  M73 MPH          MOWER              MN   MESONET

            MESONET STATION MN010 1 ENE DEXTER.

0736 PM     TSTM WND DMG     STEWARTVILLE            43.86N 92.49W
12/15/2021                   OLMSTED            MN   EMERGENCY MNGR

            REPORTS OF POWER OUTAGES.

0737 PM     TSTM WND DMG     CRESCO                  43.37N 92.12W
12/15/2021                   HOWARD             IA   TRAINED SPOTTER

            POWER OUTAGES REPORTED.

0739 PM     TSTM WND GST     3 S CLAREMONT           44.00N 93.00W
12/15/2021  E50 MPH          DODGE              MN   EMERGENCY MNGR

            ROAD SIGNS DAMAGED.

0742 PM     TSTM WND GST     1 SE DODGE CENTER       44.02N 92.84W
12/15/2021  M70 MPH          DODGE              MN   AWOS

            CORRECTS PREVIOUS TSTM WND GST REPORT FROM 1
            SE DODGE CENTER.

0744 PM     FUNNEL CLOUD     1 S HARMONY             43.54N 92.01W
12/15/2021                   FILLMORE           MN   TRAINED SPOTTER



0745 PM     TSTM WND GST     HARMONY                 43.55N 92.01W
12/15/2021  M84 MPH          FILLMORE           MN   PUBLIC



0745 PM     TSTM WND GST     ROCHESTER AIRPORT       43.91N 92.50W
12/15/2021  M77 MPH          OLMSTED            MN   ASOS



0745 PM     TSTM WND GST     2 ESE KASSON            44.02N 92.71W
12/15/2021  M72 MPH          DODGE              MN   MESONET

            MESONET STATION MN029 2 E KASSON.

0746 PM     TSTM WND GST     PRESTON                 43.67N 92.08W
12/15/2021  M47 MPH          FILLMORE           MN   AWOS



0748 PM     TSTM WND DMG     2 SE DOUGLAS            44.08N 92.55W
12/15/2021                   OLMSTED            MN   PUBLIC



0750 PM     TSTM WND DMG     SPRING VALLEY           43.69N 92.39W
12/15/2021                   FILLMORE           MN   AMATEUR RADIO

            REPORTS OF WIDESPREAD POWER OUTAGES.

0753 PM     TSTM WND DMG     1 WNW ROCHESTER         44.02N 92.49W
12/15/2021                   OLMSTED            MN   PUBLIC

            REPORT FROM MPING: TREES UPROOTED OR
            SNAPPED; ROOF BLOWN OFF.

0754 PM     TSTM WND GST     ROCHESTER               44.01N 92.48W
12/15/2021  E60 MPH          OLMSTED            MN   TRAINED SPOTTER

0758 PM     TSTM WND GST     MABEL                   43.52N 91.77W
12/15/2021  M84 MPH          FILLMORE           MN   PUBLIC

0800 PM     TSTM WND GST     7 N MABEL               43.72N 91.77W
12/15/2021  M63 MPH          FILLMORE           MN   PUBLIC

0802 PM     TSTM WND GST     ST. CHARLES             43.97N 92.06W
12/15/2021  E52 MPH          WINONA             MN   TRAINED SPOTTER

0805 PM     TSTM WND DMG     4 ESE LEWISTON          43.97N 91.79W
12/15/2021                   WINONA             MN   COUNTY OFFICIAL

            SIGNIFICANT HOUSE DAMAGE.

0808 PM     FUNNEL CLOUD     6 N NODINE              43.99N 91.45W
12/15/2021                   WINONA             MN   PARK/FOREST SRVC

            FUNNEL CLOUD VISUAL NEAR THE MISSISSIPPI
            RIVER.

0809 PM     TSTM WND DMG     4 SE LEWISTON           43.94N 91.81W
12/15/2021                   WINONA             MN   EMERGENCY MNGR

            BUILDINGS DAMAGED ALONG COUNTY HIGHWAY 25.
            TIME ESTIMATED.

0810 PM     TSTM WND GST     PLAINVIEW               44.17N 92.17W
12/15/2021  M85 MPH          WABASHA            MN   PUBLIC



0810 PM     TSTM WND DMG     LEWISTON                43.98N 91.87W
12/15/2021                   WINONA             MN   EMERGENCY MNGR

            POWER OUTAGES REPORTED.

0810 PM     TSTM WND DMG     PETERSON                43.79N 91.83W
12/15/2021                   FILLMORE           MN   PUBLIC

            MATURE, LARGE PINE TREE DOWN REPORT VIA
            MEDIA ON TWITTER.

0816 PM     TSTM WND DMG     3 WSW WILSON            43.94N 91.74W
12/15/2021                   WINONA             MN   PUBLIC

            POWER POLE BROKEN.

0817 PM     TSTM WND GST     FRENCH ISLAND           43.86N 91.26W
12/15/2021  M52 MPH          LA CROSSE          WI   ASOS



0818 PM     TSTM WND DMG     6 SSW WINONA            43.97N 91.70W
12/15/2021                   WINONA             MN   EMERGENCY MNGR

            SEMI TRUCK BLOWN OVER AT INTERSTATE 90 MILE
            MARKER 252.

0820 PM     TSTM WND GST     2 SSE KELLOGG           44.28N 91.99W
12/15/2021  M57 MPH          WABASHA            MN   MESONET

            MESONET STATION MN069 1 SSE KELLOGG.

0820 PM     TSTM WND DMG     HOLMEN                  43.96N 91.26W
12/15/2021                   LA CROSSE          WI   COUNTY OFFICIAL

            POWER LINES DOWN.

0821 PM     TSTM WND DMG     6 N NODINE              43.99N 91.45W
12/15/2021                   WINONA             MN   PUBLIC

            POWER OUTAGES REPORTED.

0822 PM     TSTM WND GST     BUFFALO                 44.23N 91.86W
12/15/2021  M50 MPH          BUFFALO            WI   PUBLIC

            CORRECTS PREVIOUS TSTM WND GST REPORT FROM
            BUFFALO.

0823 PM     TSTM WND DMG     WAUKON                  43.27N 91.48W
12/15/2021                   ALLAMAKEE          IA   PUBLIC

            TREE DOWN. TIME ESTIMATED FROM RADAR.

0825 PM     HAIL             DAKOTA                  43.91N 91.36W
12/15/2021  M0.75 INCH       WINONA             MN   EMERGENCY MNGR



0825 PM     TSTM WND DMG     4 NNE BLUFFTON          43.46N 91.87W
12/15/2021                   WINNESHIEK         IA   LAW ENFORCEMENT

            MULTIPLE TREES DOWN.

0826 PM     TSTM WND GST     2 E MARSHLAND           44.07N 91.51W
12/15/2021  M65 MPH          TREMPEALEAU        WI   MESONET

            MESONET STATION FW3090 TREMPEALEAU.

0826 PM     TSTM WND DMG     WINONA                  44.05N 91.66W
12/15/2021                   WINONA             MN   EMERGENCY MNGR

            POWER OUTAGES IN NUMEROUS COMMUNITIES.

0829 PM     TSTM WND DMG     1 SE FRENCH ISLAND      43.85N 91.24W
12/15/2021                   LA CROSSE          WI   PUBLIC



0830 PM     TSTM WND GST     LITTLEPORT              42.75N 91.37W
12/15/2021  E50 MPH          CLAYTON            IA   FIRE DEPT/RESCUE



0830 PM     HAIL             4 NE NEW AMSTERDAM      44.03N 91.27W
12/15/2021  E1.25 INCH       LA CROSSE          WI   NWS EMPLOYEE



0831 PM     TSTM WND GST     LA CROSSE AIRPORT       43.87N 91.26W
12/15/2021  M54 MPH          LA CROSSE          WI   ASOS



0832 PM     HAIL             2 S HOLMEN              43.94N 91.25W
12/15/2021  E0.25 INCH       LA CROSSE          WI   PUBLIC



0834 PM     TSTM WND GST     2 E LA CROSSE           43.81N 91.21W
12/15/2021  M48 MPH          LA CROSSE          WI   OFFICIAL NWS OBS



0841 PM     TSTM WND GST     STRAWBERRY POINT        42.68N 91.54W
12/15/2021  M48 MPH          CLAYTON            IA   EMERGENCY MNGR

            SUSTAINED WINDS.

0845 PM     TSTM WND DMG     BUFFALO                 44.23N 91.86W
12/15/2021                   BUFFALO            WI   PUBLIC

            REPORTS OF FEW TREES DOWN IN TOWN.

0847 PM     TSTM WND DMG     TREMPEALEAU             44.00N 91.43W
12/15/2021                   TREMPEALEAU        WI   COUNTY OFFICIAL

            REPORTS OF TREES DOWN WITHIN TOWN.

0851 PM     TSTM WND DMG     2 NW MELROSE            44.15N 91.03W
12/15/2021                   JACKSON            WI   EMERGENCY MNGR

            HOUSE DAMAGED.

0851 PM     TSTM WND DMG     5 SE OSSEO              44.53N 91.15W
12/15/2021                   JACKSON            WI   PUBLIC

            TREES DOWN.

0855 PM     TSTM WND GST     BLACK RIVER FALLS       44.30N 90.85W
12/15/2021  M43 MPH          JACKSON            WI   AWOS



0902 PM     TSTM WND GST     BUFFALO                 44.23N 91.86W
12/15/2021  M50 MPH          BUFFALO            WI   PUBLIC

            .

0903 PM     TSTM WND GST     BAGLEY                  42.90N 91.10W
12/15/2021  E63 MPH          GRANT              WI   FIRE DEPT/RESCUE



0911 PM     TSTM WND DMG     SPARTA                  43.94N 90.81W
12/15/2021                   MONROE             WI   EMERGENCY MNGR

            DOOR OVERHANDS DAMAGED.

0912 PM     TSTM WND DMG     3 NE BRIDGEPORT         43.03N 91.01W
12/15/2021                   CRAWFORD           WI   PUBLIC



0914 PM     TSTM WND DMG     GRAND MEADOW            43.71N 92.57W
12/15/2021                   MOWER              MN   PUBLIC



0915 PM     TSTM WND GST     LONGWOOD                44.89N 90.60W
12/15/2021  M70 MPH          CLARK              WI   PUBLIC



0915 PM     TSTM WND GST     VIROQUA                 43.56N 90.89W
12/15/2021  M69 MPH          VERNON             WI   AWOS



0915 PM     TSTM WND GST     5 S VIROQUA             43.49N 90.89W
12/15/2021  M62 MPH          VERNON             WI   PUBLIC



0915 PM     TSTM WND GST     BLUE RIVER              43.19N 90.57W
12/15/2021  E50 MPH          GRANT              WI   FIRE DEPT/RESCUE



0915 PM     FUNNEL CLOUD     6 N CHILI               44.71N 90.34W
12/15/2021                   CLARK              WI   TRAINED SPOTTER



0919 PM     TSTM WND DMG     THORP                   44.96N 90.80W
12/15/2021                   CLARK              WI   PUBLIC

            WINDOWS BLOWN OUT, ROOFS REMOVED FROM SHEDS.

0920 PM     TSTM WND GST     LANCASTER               42.85N 90.71W
12/15/2021  E50 MPH          GRANT              WI   EMERGENCY MNGR



0921 PM     TSTM WND DMG     NEILLSVILLE             44.56N 90.59W
12/15/2021                   CLARK              WI   PUBLIC

            POWER LINES ACROSS ROAD, TREE DAMAGE, DEBRIS
            FROM DAMAGED ROOF.

0924 PM     TSTM WND DMG     NEILLSVILLE             44.56N 90.59W
12/15/2021                   CLARK              WI   PUBLIC

            TREES AND POWER LINES DOWN ACROSS ROADS,
            DEBRIS FROM DAMAGE ROOF.

0928 PM     TSTM WND DMG     TOMAH                   43.99N 90.50W
12/15/2021                   MONROE             WI   EMERGENCY MNGR

            MULTIPLE LARGE TREES WERE UPROOTED AND FELL
            ON STRUCTURES AND VEHICLES IN TOMAH. ONE
            CAUSED A GAS LINE RUPTURE. MANY OTHER
            REPORTS OF TREES AND POWER LINES DOWN ACROSS
            THE COUNTY.

0930 PM     TSTM WND DMG     TOMAH                   43.99N 90.50W
12/15/2021                   MONROE             WI   EMERGENCY MNGR

            POWER LINES BLOWN DOWN.

0932 PM     TSTM WND GST     2 N VIOLA               43.54N 90.67W
12/15/2021  M62 MPH          RICHLAND           WI   PUBLIC


0934 PM     TSTM WND GST     DICKEYVILLE             42.63N 90.59W
12/15/2021  E60 MPH          GRANT              WI   EMERGENCY MNGR



0935 PM     TSTM WND GST     PLATTEVILLE             42.74N 90.48W
12/15/2021  M60 MPH          GRANT              WI   AWOS



0944 PM     TSTM WND DMG     4 N ELROY               43.80N 90.27W
12/15/2021                   JUNEAU             WI   EMERGENCY MNGR

            SEVERAL TREES BLOWN DOWN.

0950 PM     TSTM WND DMG     MEDFORD                 45.14N 90.35W
12/15/2021                   TAYLOR             WI   LAW ENFORCEMENT

            MANY TREES AND POWER LINES REPORTED DOWN
            ACROSS THE COUNTY, ESPECIALLY THE SOUTHERN
            HALF.

0955 PM     TSTM WND GST     PLATTEVILLE             42.74N 90.48W
12/15/2021  M68 MPH          GRANT              WI   AWOS


1002 PM     TSTM WND GST     LONE ROCK               43.18N 90.20W
12/15/2021  M66 MPH          RICHLAND           WI   ASOS

            CORRECTS PREVIOUS TSTM WND GST REPORT FROM
            LONE ROCK.

1006 PM     TSTM WND DMG     3 W WITHEE              44.96N 90.67W
12/15/2021                   CLARK              WI   PUBLIC

            REPORT FROM MPING: HOMES/BUILDINGS
            COMPLETELY DESTROYED.


1105 PM     TSTM WND DMG     4 E GOTHAM              43.24N 90.22W
12/15/2021                   RICHLAND           WI   PUBLIC

            REPORT FROM MPING: 3-INCH TREE LIMBS BROKEN;
            POWER POLES BROKEN.


&&

NWS Messaging:

Storm Prediction Center Convective Outlooks

Day 1 Outlook	Day 1 Wind	Day 1 Tornado

Watches and Warnings

High Wind Warnings & Wind Advisories Blanketed the Central US	Local Tornado Watch First Ever December Tornado OR Severe Thunderstorm Watch for MN and WI!	SPC Tornado Watch #565 with Hazard Probabilities

NWS La Crosse Weather Story Graphics

Severe Weather Graphic	Dangerous Wind Graphic	Power Outage Preparations