Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 32, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 17, 2021, 6:18 PM CDT for Dunn County, Eau Claire County, Pepin County, Wisconsin. It was in force for 27 min. 3 reports 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
- Jun 17, 2021, 6:18 PM CDT (23:18 UTC)
- Expired
- Jun 17, 2021, 6:45 PM CDT
- In force
- 27 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Dunn County, WI, Eau Claire County, WI, Pepin County, WI
The radar
The La Crosse radar (KARX), 104 km from the middle of the area, began a volume at 23:21 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 |
|---|---|---|---|
| Jun 17, 6:19 PM CDT | TSTM WND DMG | 1 Se Altoona, WI | TREE DOWN ON POWERLINE, TIME ESTIMATED VIA RADAR. |
| Jun 17, 6:19 PM CDT | TSTM WND DMG | 1 Se Altoona, WI | CORRECTION FOR REPORT SOURCE. TREE DOWN ON POWERLINE, TIME ESTIMATED VIA RADAR. |
| Jun 17, 6:22 PM CDT | TSTM WND DMG | 2 Sse Eau Claire, WI | LARGE BRANCHES DOWN, TIME ESTIMATED VIA 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, 11.3 hours before the alert went out and 144 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
- 288 J/kg
- Mixed-layer CIN
- -583 J/kg
- Mixed-layer LCL
- 1902 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 223 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.0
The text
As transmitted.
513
WUUS53 KMPX 172318
SVRMPX
WIC033-035-091-172345-
/O.NEW.KMPX.SV.W.0032.210617T2318Z-210617T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
618 PM CDT Thu Jun 17 2021
The National Weather Service in the Twin Cities has issued a
* Severe Thunderstorm Warning for...
Northeastern Pepin County in west central Wisconsin...
Southeastern Dunn County in west central Wisconsin...
Southwestern Eau Claire County in west central Wisconsin...
* Until 645 PM CDT.
* At 618 PM CDT, a severe thunderstorm was located 7 miles east of
Durand, or 9 miles northwest of Mondovi, moving east at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Altoona and Eau Claire.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in the Twin Cities.
&&
LAT...LON 4460 9200 4459 9203 4468 9202 4481 9140
4459 9138
TIME...MOT...LOC 2318Z 256DEG 44KT 4465 9182
HAIL...1.00IN
WIND...60MPH
$$
CTG1 follow-up statement
345
WWUS53 KMPX 172333
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
633 PM CDT Thu Jun 17 2021
WIC033-035-091-172345-
/O.CON.KMPX.SV.W.0032.000000T0000Z-210617T2345Z/
Pepin WI-Dunn WI-Eau Claire WI-
633 PM CDT Thu Jun 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR NORTHEASTERN PEPIN...SOUTHEASTERN DUNN AND SOUTHWESTERN EAU
CLAIRE COUNTIES...
At 632 PM CDT, a severe thunderstorm was located 9 miles northeast of
Mondovi, moving east at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Eau Claire, Altoona, Rock Falls and Caryville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
the Twin Cities.
&&
LAT...LON 4460 9181 4474 9173 4481 9140 4459 9138
TIME...MOT...LOC 2332Z 256DEG 44KT 4469 9157
HAIL...1.00IN
WIND...60MPH
$$
CTGThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 3:21 AM CDT | Special Weather Statement | MPX | Pepin | 39 min |
| Jun 17, 4:12 AM CDT | Special Weather Statement | MPX | Eau Claire | 33 min |
| Jun 17, 3:54 PM CDT | Fire Weather Watch | MPX | Barron, Polk, Rusk, Saint Croix | 11 hr |
| Jun 17, 6:20 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Eau Claire | 55 min |
| Jun 17, 6:40 PM CDT | Severe Thunderstorm Warning | MPX | Eau Claire | 35 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.