Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Overview

A strengthening low pressure system produced severe weather as it quickly moved from southwest Minnesota to western Lake Superior Tuesday afternoon-evening, dragging a cold front through the Upper Mississippi Valley. This system produced a handful of tornadoes across southeast Minnesota, western Iowa, and northwest Wisconsin.

From about 7 to 10 PM on September 24, severe weather consisting of damaging winds and two tornadoes occurred mainly along and north of Interstate 90 across southeast Minnesota and western Wisconsin. A total of 11 severe weather warnings (10 Severe Thunderstorm and 1 Tornado) were issued during this time period by NWS La Crosse. Wind gusts were mainly in the 40 to 60 mph range, with the strongest winds of 70 to 80 mph reported near Zumbro Falls, MN (Wabasha County). Two tornadoes were confirmed within NWS La Crosse's warning area: one in Lake City, MN and one near Greenwood, WI.

Radar loop of severe storms from September 24, 2019

Tornadoes
Photos
Storm Reports
Peak Wind
Radar
Service

Tornadoes:

Tornado - Greenwood, WI
CLARK COUNTY

Date	September 24, 2019
Time (Local)	9:26-9:31 p.m. CDT
EF Rating	EF-1 (low end)
Est. Peak Winds	88 mph
Path Length	4.7 miles
Max Width	60 yards
Injuries/Deaths	0 / 0
Summary: A tornado tracked from southwest of Greenwood to west of Loyal for approximately 5 minutes, damaging trees, barns, and silos along its path.

Track Map

Downloadable KMZ File


Greenwood, WI NWS La Crosse Damage Survey	Greenwood, WI NWS La Crosse Damage Survey	Greenwood, WI NWS La Crosse Damage Survey	Greenwood, WI NWS La Crosse Damage Survey

Tornado - Lake City, MN
WABASHA COUNTY

Date	September 24, 2019
Time (Local)	7:58-8:01 p.m. CDT
EF Rating	EF-0
Est. Peak Winds	80 mph
Path Length	1.1 miles
Max Width	35 yards
Injuries/Deaths	0 / 0
Summary: A tornado tracked through Lake City, damaging trees, some building roofs, and dry docked boats near the marina. Several trees fell on homes and mobile homes as well.

Track Map

Downloadable KMZ File


Lake City, MN NWS La Crosse Damage Survey	Lake City, MN NWS La Crosse Damage Survey	Lake City, MN NWS La Crosse Damage Survey	Lake City, MN NWS La Crosse Damage Survey

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

Photos:


Tree damage in Hammond, MN (Courtesy Tina Mann)	Roof damage in Rochester (Courtesy John Howard-Carroll)	Tree damage in Austin (Courtesy William Ingram)	Tree damage in Austin (Courtesy William Ingram)


Tornado damage in Lake City (Courtesy Mitchell Hawkins)	Damage in Lake City (Courtesy Mitchell Hawkins)	Tree damage in Lake City (Courtesy Jodee Glenna)	Tree damage in Lake City (Courtesy Jodee Glenna)

Storm Reports:

Local Storm Reports from September 24, 2019

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LA CROSSE WI
538 AM CDT WED SEP 25 2019

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

0739 PM     TSTM WND GST     4 NW GENOA              44.15N 92.68W
09/24/2019  E55 MPH          OLMSTED            MN   FIRE DEPT/RESCUE



0743 PM     TSTM WND GST     1 N MANTORVILLE         44.08N 92.76W
09/24/2019  E50 MPH          DODGE              MN   PUBLIC



0746 PM     TSTM WND DMG     DODGE CENTER            44.03N 92.85W
09/24/2019                   DODGE              MN   LAW ENFORCEMENT

            A TREE BLOWN DOWN.

0748 PM     TSTM WND DMG     LAKE CITY               44.45N 92.27W
09/24/2019                   WABASHA            MN   PUBLIC

            TREE AND POWER LINE DAMAGE. RELAYED VIA
            BROADCAST MEDIA. TIME ESTIMATED FROM RADAR.

0754 PM     TSTM WND GST     LAKE CITY               44.44N 92.28W
09/24/2019  M55 MPH          WABASHA            MN   AMATEUR RADIO

            TREES AND BRANCHES DOWN ALONG HIGHWAY 63.
            TIME ESTIMATED FROM RADAR.

0755 PM     TSTM WND GST     ZUMBRO FALLS            44.28N 92.42W
09/24/2019  E70 MPH          WABASHA            MN   LAW ENFORCEMENT

            POWER OUTAGES REPORTED.

0755 PM     TSTM WND DMG     3 ENE BERNE             44.17N 92.71W
09/24/2019                   DODGE              MN   PUBLIC

            A TREE BLOWN DOWN.

0757 PM     TSTM WND GST     3 E AUSTIN              43.67N 92.92W
09/24/2019  M60 MPH          MOWER              MN   AWOS

            AWOS STATION KAUM AUSTIN MUNICIPAL AIRPORT PEAK GUST

0758 PM     TSTM WND GST     ZUMBRO FALLS            44.28N 92.42W
09/24/2019  E80 MPH          WABASHA            MN   PUBLIC



0759 PM     LIGHTNING        BLOOMING PRAIRIE        43.87N 93.04W
09/24/2019                   DODGE              MN   LAW ENFORCEMENT

            LIGHTNING STRIKE CAUSED STRUCTURE FIRE.

0800 PM     TSTM WND DMG     HAMMOND                 44.22N 92.37W
09/24/2019                   WABASHA            MN   PUBLIC

            TREE DOWN ON CAR. RELAYED VIA BROADCAST
            MEDIA. TIME ESTIMATED FROM RADAR.

0810 PM     TSTM WND GST     3 NNW STEWARTVILLE      43.90N 92.50W
09/24/2019  M60 MPH          OLMSTED            MN   ASOS

            ASOS STATION KRST ROCHESTER INTERNATIONAL
            AIRPORT.

0812 PM     TSTM WND DMG     5 WSW MARION            43.92N 92.45W
09/24/2019                   OLMSTED            MN   PUBLIC

            TREES DOWN, PART OF A BARN ROOF PEELED OFF,
            AND CALF HUTCHES TOSSED. RELAYED VIA
            BROADCAST MEDIA. TIME ESTIMATED FROM RADAR.

0813 PM     TSTM WND GST     3 NE ROCHESTER          44.04N 92.42W
09/24/2019  M41 MPH          OLMSTED            MN   BROADCAST MEDIA



0815 PM     TSTM WND DMG     ROCHESTER               44.01N 92.48W
09/24/2019                   OLMSTED            MN   PUBLIC

            SEVERAL PHOTOS OF TREES DOWN THROUGHOUT
            ROCHESTER. RELAYED VIA BROADCAST MEDIA. TIME
            ESTIMATED FROM RADAR.

0820 PM     TSTM WND DMG     5 WNW VIOLA             44.09N 92.37W
09/24/2019                   OLMSTED            MN   PUBLIC

            3 INCH DIAMETER TREE LIMB DOWN. PHOTO VIA
            SOCIAL MEDIA.

0824 PM     TSTM WND DMG     1 SSE ALMA              44.31N 91.91W
09/24/2019                   BUFFALO            WI   PUBLIC

            SEVERAL TREES BLOWN DOWN ALONG COUNTY RD E.

0829 PM     TSTM WND DMG     MODENA                  44.46N 91.80W
09/24/2019                   BUFFALO            WI   PUBLIC

            SEVERAL TREES BLOWN DOWN IN TOWN.

0835 PM     TSTM WND GST     UTICA                   43.98N 91.96W
09/24/2019  E60 MPH          WINONA             MN   PUBLIC

            ESTIMATED 50 TO 60 MPH.

0837 PM     TSTM WND GST     1 S SAINT CHARLES       43.95N 92.07W
09/24/2019  E50 MPH          WINONA             MN   TRAINED SPOTTER

            ESTIMATED 50 MPH WINDS NEAR THE INTERSECTION
            OF I-90 AND HWY 74.

0842 PM     TSTM WND GST     2 NW BETHANY            44.04N 91.94W
09/24/2019  M55 MPH          WINONA             MN   TRAINED SPOTTER

            ESTIMATED 50 TO 55 MPH.

0847 PM     TSTM WND DMG     ELEVA                   44.58N 91.47W
09/24/2019                   TREMPEALEAU        WI   LAW ENFORCEMENT

            TREES AND POWERLINES BLOWN DOWN.

0848 PM     TSTM WND DMG     LEWISTON                43.98N 91.87W
09/24/2019                   WINONA             MN   PUBLIC

            LARGE TREES DOWN. RELAYED VIA BROADCAST
            MEDIA. TIME ESTIMATED FROM RADAR.

0850 PM     TSTM WND GST     FOUNTAIN CITY           44.12N 91.70W
09/24/2019  E55 MPH          BUFFALO            WI   TRAINED SPOTTER

            ESTIMATED 50 TO 60 MPH GUST.

0850 PM     TSTM WND DMG     1 ENE WINONA            44.05N 91.64W
09/24/2019                   WINONA             MN   PUBLIC

            ROOF DAMAGE REPORTED AT SUBWAY.

0854 PM     TSTM WND DMG     WINONA                  44.05N 91.66W
09/24/2019                   WINONA             MN   EMERGENCY MNGR

            NUMEROUS REPORTS OF TREES DOWN.
            APPROXIMATELY 1200 HOMES WITHOUT POWER IN
            WINONA, GOODVIEW, AND MINNESOTA CITY. TIME
            ESTIMATED FROM RADAR.

0859 PM     TSTM WND DMG     GOODVIEW                44.07N 91.71W
09/24/2019                   WINONA             MN   EMERGENCY MNGR

            TREES DOWN AND BLOCKING ROAD. TREES ON FIRE
            FROM POWER LINES.

0900 PM     TSTM WND DMG     OSSEO                   44.58N 91.22W
09/24/2019                   TREMPEALEAU        WI   LAW ENFORCEMENT

            TREES AND POWERLINES BLOWN DOWN.

0900 PM     TSTM WND DMG     1 E WINONA              44.05N 91.64W
09/24/2019                   WINONA             MN   PUBLIC

            TREE DAMAGE ON WINONA STATE UNIVERSITY
            CAMPUS. PHOTOS VIA SOCIAL MEDIA. TIME
            ESTIMATED FROM RADAR.

0910 PM     TSTM WND DMG     DODGE                   44.14N 91.55W
09/24/2019                   TREMPEALEAU        WI   LAW ENFORCEMENT

            TREES AND POWERLINES BLOWN DOWN.

0911 PM     TSTM WND DMG     GALESVILLE              44.08N 91.36W
09/24/2019                   TREMPEALEAU        WI   LAW ENFORCEMENT

            TREES AND POWERLINES BLOWN DOWN.

0912 PM     TSTM WND DMG     6 NW HUMBIRD            44.60N 90.96W
09/24/2019                   JACKSON            WI   TRAINED SPOTTER

            TREE UPROOTED AND DOWN ACROSS POWER LINE.

0914 PM     TSTM WND GST     WESTBORO                45.35N 90.30W
09/24/2019  M42 MPH          TAYLOR             WI   PUBLIC



0915 PM     TSTM WND DMG     6 N HUMBIRD             44.62N 90.89W
09/24/2019                   CLARK              WI   LAW ENFORCEMENT

            TREES AND POWER LINES BLOWN DOWN.

0918 PM     HAIL             2 SE HATFIELD           44.39N 90.72W
09/24/2019  E0.25 INCH       JACKSON            WI   PUBLIC



0927 PM     TSTM WND DMG     GREENWOOD               44.77N 90.60W
09/24/2019                   CLARK              WI   LAW ENFORCEMENT

            TREES AND POWER LINES BLOWN DOWN.

0929 PM     TSTM WND DMG     LOYAL                   44.74N 90.50W
09/24/2019                   CLARK              WI   LAW ENFORCEMENT

            TREES AND POWER LINES BLOWN DOWN.

0943 PM     TSTM WND GST     3 SW SPENCER            44.71N 90.34W
09/24/2019  E60 MPH          CLARK              WI   TRAINED SPOTTER



0945 PM     HEAVY RAIN       3 SSW HAMMOND           44.18N 92.41W
09/24/2019  M0.96 INCH       OLMSTED            MN   MESONET

            MESONET STATION EW7548 ROCHESTER.

0946 PM     HEAVY RAIN       3 ESE DOUGLAS           44.08N 92.52W
09/24/2019  M1.04 INCH       OLMSTED            MN   MESONET

            MESONET STATION FW3896 ROCHESTER.

0946 PM     HEAVY RAIN       1 NNE BYRON             44.04N 92.64W
09/24/2019  M1.07 INCH       OLMSTED            MN   MESONET

            MESONET STATION EW5820 BYRON.

1054 PM     HEAVY RAIN       3 NNW STEWARTVILLE      43.90N 92.50W
09/24/2019  M0.77 INCH       OLMSTED            MN   ASOS

            ASOS STATION KRST ROCHESTER INTERNATIONAL
            AIRPORT.

1101 PM     HEAVY RAIN       2 NNE FRENCH ISLAND     43.88N 91.25W
09/24/2019  M1.07 INCH       LA CROSSE          WI   ASOS

            ASOS STATION KLSE LA CROSSE REGIONAL
            AIRPORT.

Peak Wind Reports:

...HIGHEST WIND REPORTS...

Location Speed Time/Date Lat/Lon

...Iowa...

...Chickasaw County...
2 N Ionia 38 MPH 1020 PM 09/24 43.07N/92.46W

...Floyd County...
Charles City Airport 41 MPH 1015 PM 09/24 43.07N/92.62W

...Minnesota...

...Dodge County...
2 E Kasson 49 MPH 0735 PM 09/24 44.02N/92.71W
Dodge Center Airport 39 MPH 0756 PM 09/24 44.02N/92.82W

...Mower County...
1 ENE Dexter 65 MPH 0816 PM 09/24 43.73N/92.68W
Austin Municipal Airport 60 MPH 0757 PM 09/24 43.67N/92.92W

...Olmsted County...
Rochester International Airp 60 MPH 0810 PM 09/24 43.90N/92.50W
Jct CR 7 I-90 Mile Post 226 57 MPH 0920 PM 09/24 43.96N/92.21W
3 N Stewartville 50 MPH 0820 PM 09/24 43.90N/92.48W
Mayo Helipad 47 MPH 0816 PM 09/24 44.02N/92.48W
Rochester 39 MPH 0815 PM 09/24 44.09N/92.51W
Rochester 36 MPH 0810 PM 09/24 44.09N/92.49W

...Wabasha County...
Wabasha 47 MPH 0828 PM 09/24 44.30N/92.00W
Lake City 36 MPH 0815 PM 09/24 44.45N/92.27W

...Winona County...
1 E Ridgeway 51 MPH 1020 PM 09/24 43.91N/91.54W
Winona Municipal Airport 45 MPH 0855 PM 09/24 44.07N/91.70W

...Wisconsin...

...La Crosse County...
La Crosse Regional Airport 40 MPH 0756 PM 09/24 43.88N/91.25W

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:


Radar from 9:27 p.m. September 24, 2019 around the time Greenwood, WI tornado initially touched down.	Radar from 7:58 p.m. September 24, 2019 around the time Lake City, MN tornado initially touched down.	Caption	Caption