Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 52, NWS Twin Cities, MN

May 9, 2022Eau Claire County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at May 9, 2022, 8:59 PM CDT for Eau Claire County, Wisconsin. It was in force for 31 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 9, 2022, 8:59 PM CDT (01:59 UTC)
Expired
May 9, 2022, 9:30 PM CDT
In force
31 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Tornado
Possible
Hail
1.0 in
Wind
60.0 mph

County Eau Claire County, WI

The radar

The La Crosse radar (KARX), 96 km from the middle of the area, began a volume at 01:59 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.

IssuedProductOfficeLasted
May 9, 2:50 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.0 hours before the alert went out and 192 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2022-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 923 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2022-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -82 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
923 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
1801 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
-82 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The text

As transmitted.

518 
WUUS53 KMPX 100159
SVRMPX
WIC035-100230-
/O.NEW.KMPX.SV.W.0052.220510T0159Z-220510T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
859 PM CDT Mon May 9 2022

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Eastern Eau Claire County in west central Wisconsin...

* Until 930 PM CDT.

* At 859 PM CDT, a severe thunderstorm was located over Osseo, or 16
  miles north of Whitehall, moving northeast 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.

* This severe thunderstorm will be near...
  Augusta around 905 PM CDT.
  Fairchild around 915 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for west central
Wisconsin.

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

A Tornado Watch remains in effect until 1000 PM CDT for west central
Wisconsin.

&&

LAT...LON 4460 9141 4481 9122 4482 9092 4460 9093
TIME...MOT...LOC 0159Z 239DEG 44KT 4460 9120 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

PEM
1 follow-up statement
950 
WWUS53 KMPX 100222
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
922 PM CDT Mon May 9 2022

WIC035-100232-
/O.EXP.KMPX.SV.W.0052.000000T0000Z-220510T0230Z/
Eau Claire WI-
922 PM CDT Mon May 9 2022

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN EAU CLAIRE COUNTY WILL
EXPIRE AT 930 PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A Tornado Watch remains in effect until 1000 PM CDT for west central
Wisconsin.

LAT...LON 4460 9141 4481 9122 4482 9092 4460 9093
TIME...MOT...LOC 0222Z 239DEG 44KT 4474 9088 

$$

PEM

The office that day

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

IssuedProductOfficeCountiesLasted
May 9, 7:08 PM CDTTornado WarningMPXDunn, Pepin, Pierce37 min
May 9, 7:22 PM CDTSevere Thunderstorm Warning Considerable damage threatMPXDunn, Eau Claire, Pepin, Pierce23 min
May 9, 7:24 PM CDTTornado WarningMPXDunn36 min
May 9, 7:45 PM CDTSevere Thunderstorm WarningMPXDunn, Eau Claire, Pepin45 min
May 9, 7:46 PM CDTTornado Warning Tornado observedMPXChippewa, Dunn18 min
May 9, 8:06 PM CDTSpecial Weather StatementMPXRusk24 min
May 9, 8:08 PM CDTSpecial Weather StatementMPXChippewa37 min
May 9, 8:11 PM CDTSpecial Weather StatementMPXEau Claire34 min
May 9, 8:23 PM CDTTornado WarningMPXEau Claire37 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2022Every severe thunderstorm warning in 2022

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.