Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 23, NWS Twin Cities, MN

May 25, 2021Chippewa County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at May 25, 2021, 4:50 PM CDT for Chippewa County, Wisconsin. It was in force for 25 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: May 25, 2021, 4:50 PM CDT (21:50 UTC)
Expired: May 25, 2021, 5:15 PM CDT
In force: 25 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Chippewa County, WI

The radar

The La Crosse radar (KARX), 149 km from the middle of the area, began a volume at 21:51 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 25, 2:53 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.8 hours before the alert went out and 256 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 96 J/kg
Mixed-layer CIN: -140 J/kg
Mixed-layer LCL: 1118 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

703 
WUUS53 KMPX 252150
SVRMPX
WIC017-252215-
/O.NEW.KMPX.SV.W.0023.210525T2150Z-210525T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
450 PM CDT Tue May 25 2021

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Northern Chippewa County in west central Wisconsin...

* Until 515 PM CDT.

* At 450 PM CDT, a severe thunderstorm was located 6 miles east of
  Bloomer, or 19 miles north of Eau Claire, moving east at 45 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Trained weather spotters.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Cornell around 505 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4503 9146 4519 9151 4530 9116 4529 9093
      4520 9092 4513 9093
TIME...MOT...LOC 2150Z 252DEG 37KT 4513 9137 

HAIL...1.00IN
WIND...60MPH
 
$$

Dye

1 follow-up statement

691 
WWUS53 KMPX 252208
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
508 PM CDT Tue May 25 2021

WIC017-252218-
/O.EXP.KMPX.SV.W.0023.000000T0000Z-210525T2215Z/
Chippewa WI-
508 PM CDT Tue May 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CHIPPEWA COUNTY WILL
EXPIRE AT 515 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 small hail
and gusty winds are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
northwestern and west central Wisconsin.

LAT...LON 4503 9146 4519 9151 4530 9116 4529 9093
      4520 9092 4513 9093
TIME...MOT...LOC 2208Z 252DEG 37KT 4519 9113 

$$

Dye

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 25, 2:59 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Dunn, Saint Croix	31 min
May 25, 3:24 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Chippewa, Dunn, Rusk	25 min
May 25, 3:42 PM CDT	Severe Thunderstorm Warning	MPX	Pepin	21 min
May 25, 3:46 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Rusk	44 min
May 25, 4:44 PM CDT	Special Weather Statement	MPX	Chippewa	46 min
May 25, 4:49 PM CDT	Special Weather Statement	MPX	Eau Claire	41 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2021 Every 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.