Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 97, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 26, 2021, 2:44 PM CDT for Pierce County, Saint Croix County, Wisconsin; Washington County, Minnesota. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 26, 2021, 2:44 PM CDT (19:44 UTC)
- Expired
- Aug 26, 2021, 3:30 PM CDT
- In force
- 46 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Washington County, MN, Pierce County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 58 km from the middle of the area, began a volume at 19:46 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 7.7 hours before the alert went out and 60 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1566 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 146 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
173
WUUS53 KMPX 261944
SVRMPX
MNC163-WIC093-109-262030-
/O.NEW.KMPX.SV.W.0097.210826T1944Z-210826T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
244 PM CDT Thu Aug 26 2021
The National Weather Service in the Twin Cities has issued a
* Severe Thunderstorm Warning for...
Southern Washington County in east central Minnesota...
Northwestern Pierce County in west central Wisconsin...
Southwestern St. Croix County in west central Wisconsin...
* Until 330 PM CDT.
* At 243 PM CDT, a severe thunderstorm was located near Cottage
Grove, or 12 miles west of River Falls, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
River Falls, Woodbury, Maplewood, Cottage Grove, Inver Grove
Heights, Oakdale, Hastings, Rosemount, South St. Paul, Hudson, Lake
Elmo and St. Paul Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4474 9280 4475 9282 4475 9285 4477 9288
4478 9294 4477 9297 4477 9301 4489 9302
4489 9299 4497 9299 4509 9246 4475 9234
TIME...MOT...LOC 1943Z 253DEG 35KT 4484 9287
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
$$
PEM2 follow-up statements
755
WWUS53 KMPX 262005
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
305 PM CDT Thu Aug 26 2021
MNC163-262015-
/O.CAN.KMPX.SV.W.0097.000000T0000Z-210826T2030Z/
Washington MN-
305 PM CDT Thu Aug 26 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN WASHINGTON COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4474 9280 4477 9281 4482 9277 4490 9278
4491 9276 4494 9275 4497 9277 4502 9276
4509 9246 4475 9234
TIME...MOT...LOC 2005Z 253DEG 35KT 4490 9258
$$
WIC093-109-262030-
/O.CON.KMPX.SV.W.0097.000000T0000Z-210826T2030Z/
Pierce WI-St. Croix WI-
305 PM CDT Thu Aug 26 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM CDT
FOR NORTHWESTERN PIERCE AND SOUTHWESTERN ST. CROIX COUNTIES...
At 305 PM CDT, a severe thunderstorm was located near River Falls,
moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
River Falls, Hudson, Prescott, North Hudson, Ellsworth, Afton,
Hammond, Baldwin, Roberts, Lakeland, Martel and Willow River State
Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4474 9280 4477 9281 4482 9277 4490 9278
4491 9276 4494 9275 4497 9277 4502 9276
4509 9246 4475 9234
TIME...MOT...LOC 2005Z 253DEG 35KT 4490 9258
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
$$
PEM128
WWUS53 KMPX 262022
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
322 PM CDT Thu Aug 26 2021
WIC093-109-262032-
/O.EXP.KMPX.SV.W.0097.000000T0000Z-210826T2030Z/
Pierce WI-St. Croix WI-
322 PM CDT Thu Aug 26 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN PIERCE AND
SOUTHWESTERN ST. CROIX COUNTIES WILL EXPIRE AT 330 PM CDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with this thunderstorm.
LAT...LON 4474 9280 4477 9281 4482 9277 4490 9278
4491 9276 4494 9275 4497 9277 4502 9276
4509 9246 4475 9234
TIME...MOT...LOC 2022Z 253DEG 35KT 4494 9238
$$
PEMThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 3:21 PM CDT | Special Weather Statement | MPX | Dunn, Pierce, Saint Croix | 24 min |
| Aug 26, 3:47 PM CDT | Special Weather Statement | MPX | Chippewa, Dunn, Eau Claire | 58 min |
| Aug 26, 10:39 AM CDT | Severe Thunderstorm Warning | MPX | Lac qui Parle, Yellow Medicine | 51 min |
| Aug 26, 10:54 AM CDT | Special Weather Statement | MPX | Stevens | 36 min |
| Aug 26, 11:05 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Swift | 40 min |
| Aug 26, 11:32 AM CDT | Special Weather Statement | MPX | Chippewa | 28 min |
| Aug 26, 11:37 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Kandiyohi, Swift | 23 min |
| Aug 26, 12:08 PM CDT | Special Weather Statement | MPX | Kandiyohi, Meeker | 22 min |
| Aug 26, 12:22 PM CDT | Special Weather Statement | MPX | Renville | 23 min |
| Aug 26, 12:25 PM CDT | Wind Advisory | MPX | Benton, Chippewa, Douglas, Kandiyohi, Lac qui Parle, Meeker and 9 more | 3 hr |
| Aug 26, 12:52 PM CDT | Special Weather Statement | MPX | McLeod | 23 min |
| Aug 26, 1:15 PM CDT | Special Weather Statement | MPX | Carver | 30 min |
| Aug 26, 1:44 PM CDT | Special Weather Statement | MPX | Carver, Hennepin | 31 min |
| Aug 26, 1:47 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Hennepin | 28 min |
| Aug 26, 2:05 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Hennepin, Ramsey, Scott, Washington | 40 min |
| Aug 26, 2:14 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Hennepin, Ramsey | 46 min |
| Aug 26, 2:51 PM CDT | Special Weather Statement | MPX | Washington | 24 min |
| Aug 26, 5:44 PM CDT | Flash Flood Watch | MPX | Anoka, Benton, Blue Earth, Brown, Carver, Dakota and 22 more | 13 hr |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2021Severe Thunderstorm Warnings in Minnesota, 2021Every severe thunderstorm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.