Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 89, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 8, 2020, 5:53 PM CDT for 4 counties in Wisconsin. It was in force for 37 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 8, 2020, 5:53 PM CDT (22:53 UTC)
- Expired
- Aug 8, 2020, 6:30 PM CDT
- In force
- 37 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Dunn County, WI, Eau Claire County, WI, Pepin County, WI, Pierce County, WI
The radar
The La Crosse radar (KARX), 108 km from the middle of the area, began a volume at 22:53 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 8, 6:08 PM CDT | TSTM WND DMG | 1 Ne Durand, WI | A LARGE TREE WAS BLOWN DOWN IN DURAND. TIME IS BASED ON RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 10.9 hours before the alert went out and 127 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
- 1441 J/kg
- Mixed-layer CIN
- -202 J/kg
- Mixed-layer LCL
- 776 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 250 m²/s²
- 0-3 km storm-relative helicity
- 273 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted.
627
WUUS53 KMPX 082253
SVRMPX
WIC033-035-091-093-082330-
/O.NEW.KMPX.SV.W.0089.200808T2253Z-200808T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
553 PM CDT Sat Aug 8 2020
The National Weather Service in The Twin Cities has issued a
* Severe Thunderstorm Warning for...
Pepin County in west central Wisconsin...
Southeastern Pierce County in west central Wisconsin...
Southern Dunn County in west central Wisconsin...
Southwestern Eau Claire County in west central Wisconsin...
* Until 630 PM CDT.
* At 553 PM CDT, a severe thunderstorm was located 7 miles north of
Pepin, or 11 miles north of Wabasha, moving east at 45 mph. These
storms have a history of producing damaging wind.
HAZARD...60 mph wind gusts.
SOURCE...Law enforcement.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Durand, Pepin, Eau Galle, Plum City, Stockholm, Rock Falls,
Arkansaw, Caryville, Downsville, Porcupine and Ella.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4460 9196 4459 9197 4460 9200 4458 9203
4442 9208 4441 9210 4445 9223 4450 9231
4459 9234 4470 9248 4482 9165 4460 9149
TIME...MOT...LOC 2253Z 265DEG 41KT 4454 9210
HAIL...<.75IN
WIND...60MPH
$$
ETA3 follow-up statements
692
WWUS53 KMPX 082312
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
612 PM CDT Sat Aug 8 2020
WIC093-082322-
/O.CAN.KMPX.SV.W.0089.000000T0000Z-200808T2330Z/
Pierce WI-
612 PM CDT Sat Aug 8 2020
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PIERCE COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4460 9196 4459 9197 4460 9200 4458 9203
4442 9208 4441 9210 4454 9213 4475 9213
4482 9165 4460 9149
TIME...MOT...LOC 2312Z 265DEG 41KT 4456 9179
$$
WIC033-035-091-082330-
/O.CON.KMPX.SV.W.0089.000000T0000Z-200808T2330Z/
Pepin WI-Dunn WI-Eau Claire WI-
612 PM CDT Sat Aug 8 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR PEPIN...SOUTHERN DUNN AND SOUTHWESTERN EAU CLAIRE COUNTIES...
At 612 PM CDT, a severe thunderstorm was located near Mondovi, moving
east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Durand, Eau Galle, Rock Falls, Arkansaw, Caryville, Downsville,
Porcupine and Ella.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4460 9196 4459 9197 4460 9200 4458 9203
4442 9208 4441 9210 4454 9213 4475 9213
4482 9165 4460 9149
TIME...MOT...LOC 2312Z 265DEG 41KT 4456 9179
HAIL...<.75IN
WIND...60MPH
$$587
WWUS53 KMPX 082319
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
619 PM CDT Sat Aug 8 2020
WIC033-035-091-082330-
/O.CON.KMPX.SV.W.0089.000000T0000Z-200808T2330Z/
Pepin WI-Dunn WI-Eau Claire WI-
619 PM CDT Sat Aug 8 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR NORTHEASTERN PEPIN...SOUTHERN DUNN AND SOUTHWESTERN EAU CLAIRE
COUNTIES...
At 619 PM CDT, a severe thunderstorm was located over Mondovi, moving
east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Durand, Eau Galle, Rock Falls, Arkansaw, Caryville and Downsville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4460 9196 4459 9197 4460 9200 4458 9203
4460 9213 4475 9213 4482 9165 4460 9149
TIME...MOT...LOC 2319Z 265DEG 41KT 4457 9167
HAIL...<.75IN
WIND...60MPH
$$684
WWUS53 KMPX 082326
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
626 PM CDT Sat Aug 8 2020
WIC033-035-091-082335-
/O.EXP.KMPX.SV.W.0089.000000T0000Z-200808T2330Z/
Pepin WI-Dunn WI-Eau Claire WI-
626 PM CDT Sat Aug 8 2020
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PEPIN...SOUTHERN
DUNN AND SOUTHWESTERN EAU CLAIRE COUNTIES WILL EXPIRE AT 630 PM
CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
LAT...LON 4460 9196 4459 9197 4460 9200 4458 9203
4460 9213 4475 9213 4482 9165 4460 9149
TIME...MOT...LOC 2325Z 265DEG 41KT 4458 9158
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 3:10 AM CDT | Special Weather Statement | MPX | Rusk | 65 min |
| Aug 8, 4:19 AM CDT | Special Weather Statement | MPX | Rusk | 41 min |
| Aug 8, 5:25 PM CDT | Severe Thunderstorm Warning | MPX | Pepin, Pierce | 35 min |
| Aug 8, 6:38 PM CDT | Special Weather Statement | MPX | Chippewa, Eau Claire | 52 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2020Every severe thunderstorm warning in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.