Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 89, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 24, 2021, 6:50 AM CDT for Chippewa County, Eau Claire County, Wisconsin. It was in force for 25 min. 4 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
- Aug 24, 2021, 6:50 AM CDT (11:50 UTC)
- Expired
- Aug 24, 2021, 7:15 AM CDT
- In force
- 25 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Chippewa County, WI, Eau Claire County, WI
The radar
The La Crosse radar (KARX), 101 km from the middle of the area, began a volume at 11:51 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 24, 6:52 AM CDT | TSTM WND GST 63 | 2 S Eau Claire, WI | |
| Aug 24, 6:56 AM CDT | TSTM WND DMG | 2 Wnw Eau Claire, WI | STRONG WINDS RIPPED VENTS OFF THE ROOF OF AN APARTMENT COMPLEX, CAUSING MAJOR LEAKING TO APARTMENTS BELOW FROM THE HEAVY RAIN. |
| Aug 24, 6:57 AM CDT | TSTM WND DMG | 2 Ne Eau Claire, WI | REPORT FROM MPING: 3-INCH TREE LIMBS BROKEN; POWER POLES BROKEN. |
| Aug 24, 7:00 AM CDT | TSTM WND DMG | 2 Nnw Altoona, WI | 12-18 INCH DIAMETER TREE SNAPPED, LARGE BRANCHES OVER ROADWAY. PICTURE VIA WQOW. |
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 00:00Z, 11.8 hours before the alert went out and 182 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
- 501 J/kg
- Mixed-layer CIN
- -147 J/kg
- Mixed-layer LCL
- 1780 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
925
WUUS53 KMPX 241150
SVRMPX
WIC017-035-241215-
/O.NEW.KMPX.SV.W.0089.210824T1150Z-210824T1215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
650 AM CDT Tue Aug 24 2021
The National Weather Service in the Twin Cities has issued a
* Severe Thunderstorm Warning for...
Southeastern Chippewa County in west central Wisconsin...
Eau Claire County in west central Wisconsin...
* Until 715 AM CDT.
* At 650 AM CDT, a severe thunderstorm was located near Fall Creek,
or 11 miles southeast of Eau Claire, moving east at 55 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.
* This severe thunderstorm will be near...
Augusta around 700 AM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4460 9153 4487 9157 4496 9092 4460 9092
TIME...MOT...LOC 1150Z 256DEG 50KT 4470 9133
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
TDH2 follow-up statements
946
WWUS53 KMPX 241200
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
700 AM CDT Tue Aug 24 2021
WIC017-035-241215-
/O.CON.KMPX.SV.W.0089.000000T0000Z-210824T1215Z/
Chippewa WI-Eau Claire WI-
700 AM CDT Tue Aug 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 AM CDT
FOR SOUTHEASTERN CHIPPEWA AND EAU CLAIRE COUNTIES...
At 700 AM CDT, a severe thunderstorm was located near Fall Creek, or
14 miles southeast of Eau Claire, moving east at 45 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe storm will be near...
Augusta around 705 AM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4460 9149 4486 9153 4493 9092 4460 9092
TIME...MOT...LOC 1200Z 255DEG 41KT 4472 9121
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
TDH702
WWUS53 KMPX 241211
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
711 AM CDT Tue Aug 24 2021
WIC017-035-241221-
/O.EXP.KMPX.SV.W.0089.000000T0000Z-210824T1215Z/
Chippewa WI-Eau Claire WI-
711 AM CDT Tue Aug 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CHIPPEWA AND EAU
CLAIRE COUNTIES WILL EXPIRE AT 715 AM 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 9149 4486 9153 4493 9092 4460 9092
TIME...MOT...LOC 1211Z 256DEG 50KT 4474 9112
$$
TDHThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 5:05 AM CDT | Special Weather Statement | MPX | Pierce | 40 min |
| Aug 24, 5:30 AM CDT | Special Weather Statement | MPX | Pepin | 45 min |
| Aug 24, 7:00 AM CDT | Special Weather Statement | MPX | Saint Croix | 30 min |
| Aug 24, 7:13 AM CDT | Special Weather Statement | MPX | Eau Claire | 32 min |
| Aug 24, 7:28 AM CDT | Special Weather Statement | MPX | Pierce, Saint Croix | 32 min |
| Aug 24, 8:00 AM CDT | Special Weather Statement | MPX | Dunn | 30 min |
| Aug 24, 8:32 AM CDT | Special Weather Statement | MPX | Chippewa, Rusk | 28 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.