Twin Cities, MN

Weather Forecast Office

Summary of August 16, 2017 Tornadoes and Heavy Rainfall Event

Overview

During the evening of August 16th, a line of showers and thunderstorms lifted north through southern Minnesota with rotation in some of the stronger embedded cells. Multiple tornadoes occurred during the evening hours. In addition, a prolonged period of moderate to heavy rain produced up to 9 inches of rain in southwestern Minnesota.

Tornado
Storm Reports
Rainfall

Tornadoes:

Tornado #1 - South of Nicollet, MN
Nicollet County

Date	16 August 2017
Time (Local)	4:46 PM-4:52 PM CDT
EF Rating	EF-0
Est. Peak Winds	75-80 mph
Path Length	3.87 miles
Max Width	75 yards
Injuries/Deaths	0
Summary: Tornado developed south of Nicollet and lifted north northwest. It caused mainly tree damage, but did hit a farmstead and damaged a garage and grove of trees. Placement of the tornado track was based on high-res satellite imagery.

Track Map

Tornado #2 - South of Nicollet, MN
Nicollet County

Date	16 August 2017
Time (Local)	5:03 PM-5:09 PM CDT
EF Rating	EF-0
Est. Peak Winds	55-60 mph
Path Length	1.94 miles
Max Width	25 yards
Injuries/Deaths	0
Summary: Another tornado developed south of Nicollet and lifted north. It was observed by a local citizen, and caused mainly crops and tree damage. Placement of tornado track was based on high-res satellite imagery.

Track Map

Tornado #3 - New Sweden, MN
Nicollet County

Date	16 August 2017
Time (Local)	5:32 PM-5:34 PM CDT
EF Rating	EF-0
Est. Peak Winds	70 mph
Path Length	1.27 miles
Max Width	20 yards
Injuries/Deaths	0
Summary: A spotter reported two tornadoes near New Sweden. This tornado was confirmed by viewing high-res satellite imagery. Corn fields were damaged.

Track Map

Track Map EF-Scale

Tornado #4 - New Sweden, MN
Nicollet and Sibley Counties

Date	16 August 2017
Time (Local)	5:33-5:48 PM CDT
EF Rating	EF-1
Est. Peak Winds	100-105 mph
Path Length	5.25 miles
Max Width	75 yards
Injuries/Deaths	0
Summary: Tornado The strongest tornado of the day developed in northern Nicollet County and lifted into Sibley County. This was a multi-vortex tornado. A video shows one vortex stuck a farmsted directly causing significant damage to trees and out buildings.

Track Map

Tornado #5 - Gaylord, MN
Sibley County

Date	16 August 2017
Time (Local)	6:15-6:19 PM CDT
EF Rating	EF-0
Est. Peak Winds	65 mph
Path Length	1.37 miles
Max Width	60 yards
Injuries/Deaths	0
Summary: A tornado moved across corn fields and was recorded on video by a storm chaser. The tornado track placement was based on video and high-res satellite imagery.

Track Map

Tornado #6 - Winthrop, MN
Sibley County

Date	16 August 2017
Time (Local)	6:26 PM-6:33 PM CDT
EF Rating	EF-0
Est. Peak Winds	80-85 mph
Path Length	4.08 miles
Max Width	75 yards
Injuries/Deaths	0
Summary: A tornado developed east-northeast of Winthrop and tracked toward the west-northwest. It flattened some corn, uprooted trees, and caused other tree damage. Near the end of its path, it destroyed a structurally compromised barn. The maximum wind speed is estimated to have been 80 mph. Most of the path was determined through combination of the NWS Storm Survey and high-res satellite imagery.

Track Map

Track Map

Tornado #7 - New Prague, MN
Le Sueur and Scott Counties

Date	16 August 2017
Time (Local)	7:05 PM- 7:21 PM CDT
EF Rating	EF-0
Est. Peak Winds	65 mph
Path Length	1.3 miles
Max Width	10 yards
Injuries/Deaths	0
Summary: A weak circulation develop south of New Prague and moved across the western part of town. There was minor tree damage in Le Sueur County that matched up with radar. The tornado knocked over a tree in a cemetery, caused minor damage to trees and outbuildings, and blew over a chimney in Scott County.

Track Map

Tornado #8 - Stewart, MN
Sibley County

Date	16 August 2017
Time (Local)	7:21 PM - 7:22 PM CDT
EF Rating	EF-0
Est. Peak Winds	70 mph
Path Length	0.6 Miles
Max Width	25 yards
Injuries/Deaths	0
Summary: A storm chaser provided a video of a brief tornado that moved across some fields before it dissipated. No crop damage was noted.

Track Map

Tornado #9 - Prior Lake, MN
Scott County

Date	16 August 2017
Time (Local)	7:46 PM-7:49 PM CDT
EF Rating	EF-0
Est. Peak Winds	70-75 mph
Path Length	1.2 miles
Max Width	75 yards
Injuries/Deaths	0
Summary: A tornado developed near the intersection of 145th Street NW and Mystic Lake Drive. It tracked 1.2 miles northwest. Fencing and tents were blown over, trees were uprooted, and a fish house was spun around.

Track Map

Tornado #10 - Biscay/Hutchinson, MN
McLeod County

Date	16 August 2017
Time (Local)	8:05 PM - 8:07 PM CDT
EF Rating	EF-0
Est. Peak Winds	70 mph
Path Length	0.8 mile
Max Width	50 yards
Injuries/Deaths	0
Summary: A brief EF-0 tornado between Hutchinson and Biscay. It tracked through corn fields and damaged a few trees.

Track Map

Tornado #11 - Lester Prairie, MN
McLeod County

Date	16 August 2017
Time (Local)	8:08 PM - 8:09 PM CDT
EF Rating	EF-0
Est. Peak Winds	75 mph
Path Length	0.1 mile
Max Width	30 yards
Injuries/Deaths	0
Summary: A brief EF-0 tornado on the south side of Lester Prairie produced a concentrated area of tree damage as it headed west. A funnel cloud was observed a few minutes earlier on the east side of town.

Track Map

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

Storm Reports

Public Information Statement...UPDATED
National Weather Service Twin Cities/Chanhassen MN
423 PM CDT Sun Aug 20 2017

...TWO NEW TORNADOES FOUND IN MCLEOD AND SIBLEY COUNTIES...

.OVERVIEW...A band of heavy rain with embedded tornadoes lifted
north through Minnesota during the afternoon and evening of 
August 16 2017. The tornado count has been updated to 10 with more 
tornadoes still possible as videos are reviewed. 

.NICOLLET TORNADO 1...

Rating:                 EF-0
Estimated peak wind:    75-80 mph
Path length /Statute/:  1.5 miles
Path width /Maximum/:   75 yards
Fatalities:             0
Injuries:               0

Start date:             08_16_2017 
Start time:             446 PM CDT
Start location:         4 S Nicollet, MN
Start lat/lon:          44.2368 / -94.1865 

End date:               08_16_2017
End time:               452 PM CDT
End location:           2 S Nicollet, MN
End lat/lon:            44.2561 / -94.1945

SURVEY SUMMARY: Tornado developed south of Nicollet and 
lifted north northwest. It caused mainly tree damage, but
did hit a farmstead and damaged a garage and grove of 
trees.

.NICOLLET TORNADO 2...

Rating:                 EF-0
Estimated peak wind:    55-60 mph
Path length /Statute/:  0.6 miles
Path width /Maximum/:   25 yards
Fatalities:             0
Injuries:               0

Start date:             08_16_2017 
Start time:             504 PM CDT
Start location:         5 S Nicollet, MN
Start lat/lon:          44.2296 / -94.1783 

End date:               08_16_2017
End time:               509 PM CDT
End location:           4 S Nicollet, MN
End lat/lon:            44.2380 / -94.1783

SURVEY SUMMARY: A few minutes later another tornado 
developed south of Nicollet and lifted north. It was 
observed by a local citizen, and caused mainly crops 
and tree damage.

.NEW SWEDEN...

Rating:                 EF-1
Estimated peak wind:    100-105 mph
Path length /Statute/:  3.1 miles
Path width /Maximum/:   75 yards
Fatalities:             0
Injuries:               0

Start date:             08_16_2017 
Start time:             535 PM CDT
Start location:         8 S Gaylord, MN
Start lat/lon:          44.4380 / -94.1962

End date:               08_16_2017
End time:               547 PM CDT
End location:           6 SSW Gaylord, MN
End lat/lon:            44.4704 / -94.2461

SURVEY SUMMARY: The strongest tornado of the day 
developed in northern Nicollet county and lifted into
Sibley county. This was a multi-vortex tornado. Video
shows one vortex struck a farmstead directly 
causing significant damage to trees and out buildings.

.GAYLORD TORNADO...

Rating:                 EF-0
Estimated peak wind:    55 mph
Path length /Statute/:  0.5 miles
Path width /Maximum/:   60 yards
Fatalities:             0
Injuries:               0

Start date:             08_16_2016 
Start time:             614 PM CDT
Start location:         1 SW Gaylord, MN
Start Lat/Lon:          44.5407 / -94.2386

End date:               08_16_2017
End time:               617 PM CDT
End location:           1 WSW Gaylord, MN
End lat/lon:            44.5482 / -94.3402

SURVEY_SUMMARY: A weak tornado crossed HWY 19 per video and spotter 
reports. It dissipated shortly thereafter. 

.WINTHROP #1 TORNADO...

Rating:                 EF-0
Estimated peak wind:    80 mph
Path length /Statute/:  0.25 miles
Path width /Maximum/:   75 yards
Fatalities:             0
Injuries:               0

Start date:             08_16_2017 
Start time:             626 PM CDT
Start location:         4 ENE Winthrop, MN
Start lat/lon:          44.5719 / -94.3023 

End date:               08_16_2017
End time:               626 PM CDT
End location:           4 ENE Winthrop, MN
End lat/lon:            44.5719 / -94.3023

SURVEY SUMMARY: Tornado developed 4 miles ENE of Winthrop and  
traveled about 1/4 mile to the north northwest. It flattened 
some corn, uprooted a tree, and caused other tree damage. 

.WINTHROP #2 TORNADO...

Rating:                 EF-0
Estimated peak wind:    80 mph
Path length /Statute/:  0.16 miles
Path width /Maximum/:   25 yards
Fatalities:             0
Injuries:               0

Start date:             08_16_2017 
Start time:             633 PM CDT
Start location:         3 NNE Winthrop, MN
Start lat/lon:          44.5795 / -94.3457

End date:               08_16_2017
End time:               633 PM CDT
End location:           3 NNE Winthrop, MN
End lat/lon:            44.5795 / -94.3457

SURVEY SUMMARY: A tornado developed 3 NNE of Winthrop, flattened 
corn, destroyed a structurally compromised barn and produced some 
tree damage.

.NEW PRAGUE TORNADO...

Rating:                 EF-0
Estimated peak wind:    55-60 mph
Path length /Statute/:  0.5 miles
Path width /Maximum/:   10 yards
Fatalities:             0
Injuries:               0

Start date:             08_16_2017 
Start time:             705 PM CDT
Start location:         2 S New Prague, MN
Start lat/lon:          44.5359 / -93.5852

End date:               08_16_2017
End time:               708 PM CDT
End location:           2 SW New Prague, MN
End lat/lon:            44.5435 / -93.5902

SURVEY SUMMARY: A weak circulation develop south of New
Prague and moved across the far southwest part of town.
There was minor tree damage which matched up with radar.

.PRIOR LAKE TORNADO...

Rating:                 EF-0
Estimated peak wind:    70 mph
Path length /Statute/:  1.2 miles
Path width /Maximum/:   75 yards
Fatalities:             0
Injuries:               0

Start date:             08_16_2017 
Start time:             746 PM CDT
Start location:         2 WNW Prior Lake, MN
Start lat/lon:          44.7246 / -93.4707

End date:               08_16_2017
End time:               749 PM CDT
End location:           4 NW Prior Lake, MN
End lat/lon:            44.7375 / -93.4847

SURVEY SUMMARY: A tornado spun up near the intersection of 154th
St. NW and Mystic Lake Drive. It tracked 1.2 miles northwest, 
just missing Mystic Lake Casino. Fencing and tents were blown 
over, trees were uprooted, and a fish house was spun around. 

.BISCAY TORNADO...

Rating:                 EF-0
Estimated peak wind:    70 mph
Path length /Statute/:  0.75 miles
Path width /Maximum/:   50 yards
Fatalities:             0
Injuries:               0

Start date:             08_16_2017 
Start time:             805 PM CDT
Start location:         2 NW Biscay
Start Lat/Lon:          44.8516 / -94.3090

End date:               08_16_2017
End time:               807 PM CDT
End location:           3 NW Biscay
End lat/lon:            44.8508 / -94.3246

SURVEY_SUMMARY: Tornado produced corn damage as it tracked west with 
an estimated wind speed of 70 mph.

.LESTER PRAIRIE TORNADO...

Rating:                 EF-0
Estimated peak wind:    75 mph
Path length /Statute/:  Brief
Path width /Maximum/:   30 yards
Fatalities:             0
Injuries:               0

Start date:             08_16_2017 
Start time:             808 PM CDT
Start location:         Lester Prairie, MN
Start lat/lon:          44.8804 / -94.0469

End date:               08_16_2017
End time:               808 PM CDT
End location:           Lester Prairie, MN
End lat/lon:            44.8804 / -94.0469

SURVEY SUMMARY: A brief EF-0 tornado on the south side of Lester 
Prairie. It uprooted some trees and broke many tree limbs. 

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

EF0...Weak......65 to 85 mph
EF1...Weak......86 to 110 mph
EF2...Strong....111 to 135 mph
EF3...Strong....136 to 165 mph
EF4...Violent...166 To 200 mph
EF5...Violent...>200 mph

NOTE:
The information in this statement is PRELIMINARY and subject to
change pending final review of the events and publication in
NWS Storm Data.

Rainfall Map (Table of Reports Below)

Rain Reports

Public Information Statement
National Weather Service Twin Cities/Chanhassen MN
1139 AM CDT Thu Aug 17 2017

...Rainfall Reports from Past 24 Hours...

Location                     Amount    Time/Date       Provider

...Minnesota...

...Anoka County...
Coon Rapids 2ESE             2.85 in   1050 AM 08/17   CWOP
Ramsey 2ESE                  1.71 in   1043 AM 08/17   CWOP
Anoka 1S                     1.65 in   0600 AM 08/17   COCORAHS
St. Francis                  1.50 in   0800 AM 08/17   COCORAHS
St. Francis 1S               1.43 in   1033 AM 08/17   CWOP
Coon Rapids 1NW              1.41 in   1050 AM 08/17   CWOP
Anoka 2SE                    1.28 in   1053 AM 08/17   CWOP
Coon Rapids 3NNE             1.27 in   0700 AM 08/17   COCORAHS
Columbia Heights 1WSW        1.18 in   1055 AM 08/17   CWOP
Ham Lake  2E                 1.18 in   0700 AM 08/17   COCORAHS
Circle Pines 1E              1.12 in   0700 AM 08/17   COCORAHS

...Benton County...
Royalton 2S                  2.09 in   1000 AM 08/17   HADS
Rice                         1.40 in   0700 AM 08/17   COOP

...Blue Earth County...
Mankato AP                   1.51 in   0656 AM 08/17   AWOS
Skyline                      1.13 in   0700 AM 08/17   COCORAHS

...Brown County...
New Ulm                      3.30 in   0500 AM 08/17   COCORAHS
Springfield 1NW              2.94 in   1041 AM 08/17   CWOP
Springfield                  2.52 in   1030 AM 08/17   GOES
Cobden                       1.73 in   1045 AM 08/17   GOES
Sveadahl 5NNW                1.69 in   0700 AM 08/17   COCORAHS
Leavenworth                  1.67 in   1045 AM 08/17   GOES

...Carver County...
Chanhassen                   2.85 in   0700 AM 08/17   COCORAHS
Chanhassen (NWS)             2.62 in   0700 AM 08/17   COOP
Jordan                       2.15 in   1045 AM 08/17   GOES
Victoria 2ENE                2.08 in   0800 AM 08/17   COCORAHS
Chaska 1ESE                  2.07 in   0655 AM 08/17   COCORAHS
Carver 3S                    1.77 in   0949 AM 08/17   RAWS
Carver 1W                    1.70 in   0700 AM 08/17   COCORAHS
Waconia 1.1 SW               1.50 in   0700 AM 08/17   COCORAHS
Waconia                      1.47 in   0600 AM 08/17   UCOOP
Chanhassen 2SW               1.38 in   0700 AM 08/17   UCOOP
Mayer                        1.21 in   1030 AM 08/17   UCOOP
Victoria 1WSW                1.17 in   1052 AM 08/17   CWOP
Victoria 1WSW                1.14 in   0700 AM 08/17   COCORAHS

...Chippewa County...
Montevideo                   3.91 in   0700 AM 08/17   COCORAHS
Montevideo 1S                3.78 in   1050 AM 08/17   CWOP
Watson 1 NE                  3.10 in   0800 AM 08/17   COOP
Laq Qui Parle Dam            2.49 in   1000 AM 08/17   GOES
Milan 5E                     2.31 in   1045 AM 08/17   USARMY-COE

...Chisago County...
Scandia 3NNE                 1.58 in   1055 AM 08/17   CWOP
4 NW Scandia                 1.16 in   0700 AM 08/17   COCORAHS
Center City                  1.15 in   0700 AM 08/17   COCORAHS
Branch 8ENE                  1.00 in   1050 AM 08/17   CWOP

...Dakota County...
Burnsville 3ENE              2.51 in   0620 AM 08/17   COCORAHS
Burnsville 3SSW              2.24 in   0640 AM 08/17   COCORAHS
Hastings 1WSW                1.75 in   0639 AM 08/17   COCORAHS
Hastings (L/D 2)             1.58 in   0800 AM 08/17   COOP
Inver Grove Hgts 1ENE        1.55 in   0700 AM 08/17   COCORAHS
Hastings 1SSW                1.55 in   0500 AM 08/17   COCORAHS
Eagan 1NW                    1.53 in   0620 AM 08/17   COCORAHS
Lakeville 2WSW               1.47 in   0755 AM 08/17   COCORAHS
South St. Paul AP            1.41 in   0653 AM 08/17   AWOS
Rosemount 3W                 1.37 in   0732 AM 08/17   COCORAHS
Rosemount 3SW                1.27 in   0620 AM 08/17   COCORAHS
Eagan 2SE                    1.26 in   1059 AM 08/17   CWOP
Inver Grove Hgts 1WSW        1.21 in   0745 AM 08/17   COCORAHS
3 E Apple Valley             1.21 in   0640 AM 08/17   COCORAHS
Lakeville 2NE                1.20 in   1048 AM 08/17   CWOP
Apple Valley 2E              1.19 in   0600 AM 08/17   COCORAHS
Rosemount 3WNW               1.15 in   0700 AM 08/17   COCORAHS
Apple Valley 2NNW            1.14 in   1225 AM 08/17   COCORAHS
Rosemount 2NW                1.11 in   0700 AM 08/17   COCORAHS
Eagan 2ESE                   1.07 in   1050 AM 08/17   CWOP
Miesville 2WSW               1.03 in   0605 AM 08/17   COCORAHS

...Douglas County...
Nelson 2WSW                  1.31 in   0700 AM 08/17   COCORAHS
Farwell 5N                   1.27 in   0730 AM 08/17   COCORAHS
Brandon 0.4 WNW              1.17 in   0800 AM 08/17   COCORAHS
Alexandria 1ENE              1.11 in   0700 AM 08/17   COCORAHS
Millerville 5E               1.00 in   0800 AM 08/17   COCORAHS

...Goodhue County...
Lake City 1NNW               2.98 in   0700 AM 08/17   COCORAHS
Lake City 2NW                2.01 in   1049 AM 08/17   CWOP
Red Wing (L/D 3)             2.01 in   0800 AM 08/17   COOP
Frontenac                    2.00 in   1045 AM 08/17   UCOOP
Wanamingo                    1.61 in   1030 AM 08/17   GOES
Sogn                         1.43 in   1030 AM 08/17   GOES
Vasa 5E                      1.35 in   0700 AM 08/17   COCORAHS
Wanamingo 3SSE               1.31 in   0700 AM 08/17   COCORAHS
Zumbrota 2NNE                1.24 in   0515 AM 08/17   COCORAHS
Red Wing 4SE                 1.21 in   0800 AM 08/17   COCORAHS
Wanamingo 4SSE               1.17 in   0800 AM 08/17   COCORAHS
Dennison 6E                  1.11 in   0700 AM 08/17   COCORAHS
Vasa 5NNE                    1.04 in   0800 AM 08/17   COCORAHS
Red Wing 4W                  1.03 in   0700 AM 08/17   COCORAHS
Cannon Falls 2S              1.02 in   1030 AM 08/17   GOES
Zumbrota                     1.01 in   0700 AM 08/17   COOP

...Hennepin County...
Eden Prairie 2WSW            2.79 in   0700 AM 08/17   COCORAHS
Eden Prairie 3SE             2.64 in   0857 AM 08/17   COCORAHS
Chanhassen 2SE               2.61 in   0800 AM 08/17   COCORAHS
Long Lake 1NW                2.56 in   0600 AM 08/17   COCORAHS
Saint Louis Park 2ESE        2.42 in   0915 AM 08/17   COCORAHS
Long Lake                    2.34 in   0700 AM 08/17   COCORAHS
Eden Prairie 3ESE            2.12 in   1050 AM 08/17   CWOP
Golden Valley                2.10 in   0555 AM 08/17   COCORAHS
Lake Minnetonka 1WSW         2.08 in   0500 AM 08/17   COCORAHS
Eden Prairie 2E              2.07 in   0800 AM 08/17   COCORAHS
Osseo                        2.07 in   0700 AM 08/17   COCORAHS
Long Lake 4SW                2.05 in   0700 AM 08/17   COCORAHS
Brooklyn Park 1W             2.00 in   1050 AM 08/17   CWOP
Plymouth 1E                  2.00 in   0800 AM 08/17   COCORAHS
Plymouth 2ENE                2.00 in   0700 AM 08/17   COCORAHS
Hopkins                      1.98 in   0800 AM 08/17   COCORAHS
Eden Prairie AP              1.93 in   0653 AM 08/17   ASOS
Golden Valley                1.93 in   0700 AM 08/17   COCORAHS
Brooklyn Center 1E           1.92 in   0700 AM 08/17   COCORAHS
Champlin 1SW                 1.92 in   0700 AM 08/17   COCORAHS
Osseo 1 NW                   1.87 in   0800 AM 08/17   COCORAHS
New Hope 1.9 S               1.83 in   1030 AM 08/17   COCORAHS
Edina 1SW                    1.82 in   0807 AM 08/17   COCORAHS
Robbinsdale 2ESE             1.80 in   0700 AM 08/17   COCORAHS
Falcon Heights 3SSW          1.77 in   0700 AM 08/17   COCORAHS
Robbinsdale                  1.76 in   0700 AM 08/17   COCORAHS
Crystal AP                   1.70 in   0653 AM 08/17   ASOS
St. Louis Park               1.70 in   0700 AM 08/17   COCORAHS
Minneapolis 4NNW             1.68 in   0700 AM 08/17   COCORAHS
Lake Minnetonka 1WSW         1.60 in   1056 AM 08/17   CWOP
Robbinsdale                  1.60 in   1058 AM 08/17   CWOP
Maple Grove 1SSW             1.60 in   0715 AM 08/17   COCORAHS
Minneapolis 1 WSW            1.59 in   0800 AM 08/17   COCORAHS
Golden Valley 2WSW           1.59 in   0700 AM 08/17   COCORAHS
Brooklyn Park 2E             1.58 in   0800 AM 08/17   COCORAHS
Richfield 3ENE               1.57 in   0600 AM 08/17   COCORAHS
Lake Minnetonka Area         1.56 in   0630 AM 08/17   COCORAHS
Minneapolis-St. Paul AP-MSP  1.56 in   0653 AM 08/17   ASOS
Minnetonka                   1.52 in   1040 AM 08/17   CWOP
Plymouth 3 NW                1.52 in   0900 AM 08/17   COCORAHS
Loretto 2NW                  1.50 in   1040 AM 08/17   CWOP
Maple Grove 1N               1.49 in   0900 AM 08/17   COCORAHS
Maple Grove 1SSW             1.48 in   0700 AM 08/17   COCORAHS
St. Louis Park 1E            1.45 in   1055 AM 08/17   CWOP
Richfield 3ENE               1.43 in   0700 AM 08/17   COCORAHS
Minneapolis (Target Fld)     1.42 in   0800 AM 08/17   COCORAHS
Maple Grove 1N               1.41 in   0800 AM 08/17   COCORAHS
Bloomington 3W               1.36 in   1043 AM 08/17   CWOP
Dayton 1NNE                  1.29 in   0700 AM 08/17   COCORAHS
Edina 1 N                    1.25 in   0700 AM 08/17   COCORAHS
Minneapolis 3SE              1.25 in   0610 AM 08/17   COCORAHS
Columbia Hgts 1S             1.23 in   0700 AM 08/17   COCORAHS
Plymouth 2WSW                1.21 in   1046 AM 08/17   CWOP
Maple Grove 3SW              1.18 in   0630 AM 08/17   COCORAHS
Richfield 3NNE               1.15 in   1049 AM 08/17   CWOP
Bloomington 1 ESE            1.14 in   0800 AM 08/17   COCORAHS
Edina 1SE                    1.06 in   0650 AM 08/17   COCORAHS
St. Bonifacius 4ENE          1.01 in   1053 AM 08/17   CWOP
Minneapolis Dwtn (Miss R)    1.00 in   0800 AM 08/17   COOP
Edina 1SE                    1.00 in   0700 AM 08/17   COCORAHS

...Isanti County...
Cambridge                    1.11 in   1100 AM 08/17   CWOP

...Kanabec County...
Mora                         1.09 in   1000 AM 08/17   HADS

...Kandiyohi County...
Willmar 5N                   4.11 in   0600 AM 08/17   COOP
Willmar                      4.10 in   0830 AM 08/17   COCORAHS
Pennock 6NNE                 3.89 in   0700 AM 08/17   COCORAHS
Willmar 1 ESE                3.82 in   0800 AM 08/17   COCORAHS
Willmar 2ENE                 3.43 in   1044 AM 08/17   CWOP
New London 6WSW              3.20 in   0700 AM 08/17   COCORAHS
Regal                        2.74 in   0700 AM 08/17   COCORAHS

...Lac qui Parle County...
Montevideo 2SW               3.62 in   1000 AM 08/17   USARMY-COE
Montevideo 1SW               3.57 in   0700 AM 08/17   COOP
Providence                   3.04 in   1030 AM 08/17   GOES
Dawson                       2.70 in   0700 AM 08/17   COOP
Dawson                       2.66 in   1030 AM 08/17   GOES
Madison                      2.30 in   0800 AM 08/17   COOP

...Le Sueur County...
New Prague                   1.92 in   0700 AM 08/17   COCORAHS
Montgomery 3E                1.89 in   0700 AM 08/17   COCORAHS

...Martin County...
Fairmont AP                  1.03 in   0656 AM 08/17   AWOS

...McLeod County...
Brownton                     2.70 in   0800 AM 08/17   COOP
Brownton                     2.67 in   1030 AM 08/17   GOES
Hutchinson 5N                2.29 in   0645 AM 08/17   COCORAHS
Glencoe 3WSW                 2.13 in   0709 AM 08/17   COCORAHS
Hutchinson AP                1.90 in   0653 AM 08/17   AWOS
Silver Lake 1NNW             1.83 in   0700 AM 08/17   COCORAHS
Hutchinson                   1.80 in   1045 AM 08/17   UCOOP
Glencoe                      1.70 in   0800 AM 08/17   COCORAHS
Glencoe 3NW                  1.67 in   0700 AM 08/17   COCORAHS
Hutchinson 1 SSE             1.61 in   0700 AM 08/17   COCORAHS
Hutchinson 1NW               1.58 in   0700 AM 08/17   COCORAHS
Lester Prairie               1.37 in   1045 AM 08/17   HADS

...Meeker County...
Cosmos 1E                    3.18 in   1030 AM 08/17   GOES
Litchfield 3S                2.82 in   1011 AM 08/17   RAWS
Manannah                     2.41 in   1030 AM 08/17   GOES
3 WSW Watkins                2.10 in   0900 AM 08/17   COCORAHS
Dassel                       1.86 in   0700 AM 08/17   COCORAHS

...Mille Lacs County...
Onamia 4WNW                  1.47 in   0746 AM 08/17   COCORAHS
Milaca                       1.44 in   0730 AM 08/17   COOP
Princeton 1NE                1.32 in   0700 AM 08/17   COCORAHS
Princeton 1NNE               1.27 in   1032 AM 08/17   CWOP
Milaca 7NNW                  1.27 in   1000 AM 08/17   HADS
Bock 3WNW                    1.19 in   1050 AM 08/17   CWOP
Foreston 1WNW                1.16 in   1053 AM 08/17   CWOP
Onamia (RS)                  1.14 in   0800 AM 08/17   COOP
Princeton 1WNW               1.06 in   1045 AM 08/17   HADS

...Morrison County...
Little Falls 2SSE            2.60 in   1007 AM 08/17   RAWS
Motley 6SE                   2.34 in   0700 AM 08/17   COCORAHS
Randall                      2.17 in   1031 AM 08/17   CWOP
Sobieski 3E                  2.16 in   1000 AM 08/17   HADS
Camp Ripley 4E               1.94 in   0800 AM 08/17   COCORAHS
Bowlus 2E                    1.86 in   1000 AM 08/17   HADS
Royalton 4E                  1.62 in   1015 AM 08/17   HADS
Pine Center 4SSE             1.52 in   0700 AM 08/17   COCORAHS
Granite Ledge 7N             1.39 in   1048 AM 08/17   CWOP

...Nicollet County...
New Ulm 3SE                  3.33 in   0423 AM 08/17   COOP
St. Peter 6WSW               1.22 in   0700 AM 08/17   COCORAHS
Kasota 4WSW                  1.10 in   0653 AM 08/17   COCORAHS

...Ramsey County...
St. Paul Dwtn AP             1.97 in   0653 AM 08/17   ASOS
St. Paul (UMN-AG Exp Frm)    1.92 in   0800 AM 08/17   COOP
Falcon Hgts 1SSW             1.88 in   0700 AM 08/17   COCORAHS
Falcon Hgts                  1.87 in   1015 AM 08/17   HADS
North St Paul 1NNW           1.82 in   0630 AM 08/17   COCORAHS
Roseville 1NW                1.72 in   0700 AM 08/17   COCORAHS
St. Paul 3WNW                1.66 in   0730 AM 08/17   COCORAHS
Roseville 2WNW               1.56 in   0600 AM 08/17   COCORAHS
Mendota Hgts 2WNW            1.44 in   0700 AM 08/17   COCORAHS
Roseville                    1.40 in   0615 AM 08/17   COCORAHS
St. Paul 1N                  1.32 in   0515 AM 08/17   COCORAHS
North St. Paul 1WNW          1.24 in   0700 AM 08/17   COCORAHS
Roseville 2ESE               1.23 in   1047 AM 08/17   CWOP
1 E Little Canada            1.20 in   0700 AM 08/17   COCORAHS
St. Paul 1SW                 1.15 in   1050 AM 08/17   CWOP
St. Paul 1WSW                1.13 in   1051 AM 08/17   CWOP
Roseville 2ESE               1.09 in   0700 AM 08/17   COCORAHS
North Oaks 1WNW              1.09 in   0700 AM 08/17   COCORAHS

...Redwood County...
Redwood Falls AP             9.45 in   0653 AM 08/17   ASOS
Redwood Falls                8.12 in   0630 AM 08/17   COOP
Lucan                        4.58 in   0544 AM 08/17   COCORAHS
Vesta                        3.98 in   0900 AM 08/17   COOP
Redwood Falls                3.97 in   1030 AM 08/17   GOES
Wabasso 3E                   2.05 in   0700 AM 08/17   COCORAHS
Lamberton                    1.26 in   1030 AM 08/17   GOES

...Renville County...
Morton                       6.82 in   1030 AM 08/17   GOES
Beaver Falls                 6.47 in   1045 AM 08/17   GOES
Maynard                      6.07 in   1045 AM 08/17   GOES
Bird Island 7SSE             5.88 in   0630 AM 08/17   COCORAHS
Delhi 5NE                    5.75 in   0700 AM 08/17   COCORAHS
Danube 2WNW                  5.70 in   0700 AM 08/17   COCORAHS
Granite Falls                5.26 in   1045 AM 08/17   UCOOP
Lake Lillian 5SE             3.85 in   0645 AM 08/17   COCORAHS

...Rice County...
Veseli 1W                    2.03 in   0500 AM 08/17   COCORAHS
Montgomery 3ENE              2.01 in   0530 AM 08/17   COCORAHS
Veseli 2E                    1.74 in   0700 AM 08/17   COCORAHS
Morristown                   1.07 in   1053 AM 08/17   CWOP
Morristown                   1.02 in   1030 AM 08/17   GOES

...Scott County...
Prior Lake 1WSW              2.48 in   0700 AM 08/17   COCORAHS
Prior Lake 2WSW              2.19 in   1047 AM 08/17   CWOP
Shakopee 1NW                 2.06 in   1057 AM 08/17   CWOP
Jordan 2NE                   2.04 in   0630 AM 08/17   COCORAHS
Jordan 1SW                   1.73 in   0530 AM 08/17   COOP
Savage 2WNW                  1.64 in   1046 AM 08/17   CWOP
New Market 4W                1.61 in   0653 AM 08/17   COCORAHS
New Prague                   1.58 in   1100 AM 08/17   CWOP
Jordan 6E                    1.56 in   1052 AM 08/17   CWOP
Elko                         1.12 in   1055 AM 08/17   CWOP
Prior Lake                   1.09 in   1100 AM 08/17   CWOP
Savage                       1.05 in   1046 AM 08/17   CWOP

...Sherburne County...
Zimmerman                    1.44 in   1053 AM 08/17   CWOP
Princeton 2WSW               1.39 in   0400 AM 08/17   COCORAHS
Elk River                    1.19 in   0900 AM 08/17   COCORAHS
St. Cloud AP                 1.15 in   0653 AM 08/17   ASOS
Elk River 1SSW               1.14 in   1049 AM 08/17   CWOP
Santiago 3E                  1.09 in   1020 AM 08/17   RAWS
Elk River                    1.06 in   0700 AM 08/17   COOP

...Sibley County...
Arlington                    1.43 in   1045 AM 08/17   GOES

...Stearns County...
Melrose                      3.18 in   0700 AM 08/17   COOP
St. Martin 1NW               2.95 in   1000 AM 08/17   HADS
Brooten 3NNE                 2.71 in   1015 AM 08/17   HADS
Paynesville 1SSW             2.54 in   0700 AM 08/17   COCORAHS
Westport 3ESE                2.48 in   0700 AM 08/17   COCORAHS
Sauk Centre AP               2.02 in   0653 AM 08/17   AWOS
Kimball 3N                   1.77 in   0600 AM 08/17   COOP
Rice 1W                      1.68 in   0700 AM 08/17   COCORAHS
St. Cloud 5W                 1.44 in   0745 AM 08/17   COCORAHS
Avon 4ESE                    1.26 in   1050 AM 08/17   CWOP
St. Cloud (SCSU)             1.25 in   0600 AM 08/17   UCOOP
Clearwater 3W                1.11 in   1050 AM 08/17   CWOP

...Stevens County...
Morris (AG Exp Frm)          2.01 in   0800 AM 08/17   COOP
Morris 1 SSE                 1.77 in   0700 AM 08/17   COCORAHS
Donnelly 2WNW                1.62 in   0700 AM 08/17   COCORAHS
Morris 4SW                   1.49 in   1039 AM 08/17   CWOP

...Swift County...
Benson                       2.13 in   1045 AM 08/17   GOES
Benson                       1.77 in   1030 AM 08/17   GOES
Clontarf                     1.49 in   1045 AM 08/17   GOES

...Todd County...
Swanville                    2.75 in   0700 AM 08/17   COCORAHS
Long Prairie                 2.51 in   0600 AM 08/17   COOP
Philbrook 4SSW               2.00 in   1045 AM 08/17   GOES
Hewitt 1NNW                  1.35 in   0640 AM 08/17   COCORAHS

...Waseca County...
Morristown 2SW               1.13 in   0630 AM 08/17   COCORAHS

...Washington County...
Lakeland 2WNW                1.47 in   0700 AM 08/17   COCORAHS
Woodbury                     1.47 in   0600 AM 08/17   COCORAHS
St. Paul Park                1.39 in   0700 AM 08/17   COCORAHS
Woodbury                     1.39 in   0640 AM 08/17   COCORAHS
Stillwater 2 SW              1.37 in   0800 AM 08/17   COOP
Cottage Grove 1ESE           1.26 in   1049 AM 08/17   CWOP
Stillwater                   1.26 in   0630 AM 08/17   COCORAHS
Woodbury                     1.22 in   0700 AM 08/17   COCORAHS
Hugo 2WSW                    1.13 in   1052 AM 08/17   CWOP
Mahtomedi                    1.08 in   0800 AM 08/17   COCORAHS
Stillwater 1NE               1.00 in   0640 AM 08/17   COCORAHS

...Watonwan County...
Madelia                      1.86 in   1052 AM 08/17   CWOP
La Salle 5SE                 1.33 in   1030 AM 08/17   GOES
La Salle 2NW                 1.27 in   0700 AM 08/17   COCORAHS
St. James                    1.04 in   0700 AM 08/17   COCORAHS

...Wright County...
Cokato 4NE                   1.52 in   1045 AM 08/17   HADS
Clearwater                   1.50 in   1045 AM 08/17   HADS
French Lake                  1.43 in   1054 AM 08/17   CWOP
Clearwater 4SSE              1.31 in   0825 AM 08/17   COCORAHS
Maple Lake                   1.29 in   0700 AM 08/17   COCORAHS
Maple Lake 2SSW              1.27 in   1052 AM 08/17   CWOP
Delano                       1.17 in   1030 AM 08/17   HADS
Hanover                      1.15 in   0800 AM 08/17   COCORAHS
Rockford                     1.11 in   0700 AM 08/17   COOP
Rockford                     1.10 in   0700 AM 08/17   COCORAHS
Big Lake 2SSE                1.02 in   1057 AM 08/17   CWOP
Buffalo                      1.01 in   0725 AM 08/17   COCORAHS
St. Michael 1E               1.01 in   0800 AM 08/17   COCORAHS

...Yellow Medicine County...
Montevideo 4S                4.66 in   0700 AM 08/17   COCORAHS
Hanley Falls                 4.57 in   1045 AM 08/17   GOES
Clarkfield 4NE               4.45 in   0700 AM 08/17   COCORAHS
Hanley Falls                 4.27 in   1045 AM 08/17   GOES
Boyd 5SW                     2.80 in   0700 AM 08/17   COCORAHS
Canby                        2.41 in   0730 AM 08/17   COCORAHS
Canby                        2.37 in   0800 AM 08/17   COOP

...Wisconsin...

...Barron County...
Dallas 4E                    1.47 in   0700 AM 08/17   COCORAHS
Prairie Farm 3W              1.47 in   0700 AM 08/17   COCORAHS
Rice Lake                    1.44 in   0800 AM 08/17   COOP
Chetek AP                    1.37 in   0655 AM 08/17   AWOS
Chetek 2SE                   1.33 in   0700 AM 08/17   COCORAHS
Haugen 2SE                   1.20 in   0800 AM 08/17   COCORAHS
Cumberland 2WNW              1.16 in   0700 AM 08/17   COCORAHS
Rice Lake AP                 1.13 in   0655 AM 08/17   AWOS
Cumberland 2WNW              1.05 in   0630 AM 08/17   COCORAHS
Clayton 3ENE                 1.02 in   0700 AM 08/17   COCORAHS

...Chippewa County...
Colfax 7ESE                  2.14 in   1046 AM 08/17   CWOP
Eau Claire AP                1.44 in   0656 AM 08/17   ASOS
Jim Falls 3NW                1.22 in   0630 AM 08/17   COOP
Bloomer                      1.20 in   0800 AM 08/17   COOP

...Dunn County...
Menomonie                    2.27 in   0900 AM 08/17   COCORAHS
Elk Mound 4SE                2.02 in   0800 AM 08/17   COCORAHS
Menomonie AP                 1.84 in   0655 AM 08/17   AWOS
Elk Mound                    1.74 in   0700 AM 08/17   UCOOP
Cedar Falls (Hydro)          1.64 in   0700 AM 08/17   COOP
Wheeler                      1.52 in   0615 AM 08/17   COOP
Knapp 2E                     1.51 in   0700 AM 08/17   COCORAHS
Downsville 6E                1.31 in   0700 AM 08/17   COCORAHS
Boyceville 3NNE              1.15 in   0700 AM 08/17   COCORAHS

...Eau Claire County...
Eau Claire 1S                1.89 in   1055 AM 08/17   CWOP
Augusta 4NW                  1.88 in   0700 AM 08/17   COCORAHS
Altoona                      1.67 in   0600 AM 08/17   COCORAHS
Eau Claire                   1.47 in   1053 AM 08/17   CWOP
Eau Claire-Dells Dam         1.43 in   0600 AM 08/17   GOES
Altoona 1E                   1.36 in   1100 AM 08/17   CWOP
Eau Claire 3SSW              1.34 in   0630 AM 08/17   COCORAHS
Eau Claire 2SSW              1.33 in   1100 AM 08/17   CWOP
Augusta 1NW                  1.11 in   1005 AM 08/17   RAWS
Eau Claire 3SW               1.10 in   1200 AM 08/17   COOP

...Pepin County...
Stockholm 1S                 2.57 in   1015 AM 08/17   USARMY-COE
Durand                       1.32 in   0730 AM 08/17   COCORAHS
Durand                       1.06 in   1045 AM 08/17   USARMY-COE

...Pierce County...
Ellsworth 1S                 2.89 in   0900 AM 08/17   COCORAHS
Ellsworth 1E                 2.45 in   0700 AM 08/17   COOP
River Falls 1S               2.19 in   0700 AM 08/17   COCORAHS
Spring Valley 1WSW           2.18 in   0730 AM 08/17   COCORAHS
El Paso 7NW                  2.13 in   0726 AM 08/17   COCORAHS
River Falls 1SW              2.02 in   0735 AM 08/17   COCORAHS
El Paso 1NW                  1.84 in   0800 AM 08/17   COCORAHS
Prescott                     1.69 in   0700 AM 08/17   COCORAHS
River Falls                  1.53 in   0500 AM 08/17   COCORAHS
Ellsworth 6WNW               1.29 in   0600 AM 08/17   COCORAHS
Spring Valley 1SSW           1.28 in   1044 AM 08/17   CWOP
River Falls                  1.20 in   0605 AM 08/17   UCOOP
Ellsworth 3ESE               1.10 in   0829 AM 08/17   COCORAHS

...Polk County...
Balsam Lake 4SE              1.24 in   0700 AM 08/17   COCORAHS
Amery 2S                     1.21 in   0730 AM 08/17   COCORAHS

...Rusk County...
Tony AP                      1.19 in   0655 AM 08/17   AWOS
Sheldon                      1.10 in   0600 AM 08/17   UCOOP
Ladysmith 2SW                1.06 in   1005 AM 08/17   RAWS

...St. Croix County...
Baldwin                      1.75 in   0700 AM 08/17   COOP
River Falls 1NW              1.68 in   0700 AM 08/17   COCORAHS
Roberts                      1.41 in   0800 AM 08/17   COOP
Glenwood City 5WNW           1.26 in   1050 AM 08/17   CWOP
Spring Valley                1.02 in   1030 AM 08/17   USARMY-COE

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.

$$

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Arctic Air Mass Lingers for Areas of the East; Critical Fire Weather for the Plains; Active Weather Pattern for Hawaii

Summary of August 16, 2017 Tornadoes and Heavy Rainfall Event