Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 94, NWS Twin Cities, MN

May 26, 2012Dunn County, Pierce County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at May 26, 2012, 4:10 PM CDT for Dunn County, Pierce County, Saint Croix County, Wisconsin. It was in force for 65 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
May 26, 2012, 4:10 PM CDT (21:10 UTC)
Expired
May 26, 2012, 5:15 PM CDT
In force
65 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Dunn County, WI, Pierce County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 109 km from the middle of the area, began a volume at 21:10 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

TimeReportWhereRemark
May 26, 4:50 PM CDTHAIL 13 S Ellsworth, WI
May 26, 5:00 PM CDTHAIL 1.754 Sw Elmwood, WIGOLF BALL SIZED HAIL REPORTED BY TRAINED SPOTTER.
May 26, 5:03 PM CDTHAIL 1.54 Sw Elmwood, WIPING PONG SIZED HAIL REPORTED BY TRAINED SPOTTER...LASTED 4 MINUTES.
May 26, 5:15 PM CDTHAIL 1.25Elmwood, WI

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, 9.2 hours before the alert went out and 112 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 12:00Z on 2012-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2012-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
858 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
268 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

335 
WUUS53 KMPX 262110
SVRMPX
WIC033-093-109-262215-
/O.NEW.KMPX.SV.W.0094.120526T2110Z-120526T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
410 PM CDT SAT MAY 26 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN DUNN COUNTY IN WEST CENTRAL WISCONSIN...
  PIERCE COUNTY IN WEST CENTRAL WISCONSIN...
  SOUTHEASTERN ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 515 PM CDT

* AT 406 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR DIAMOND
  BLUFF...OR ABOUT 8 MILES NORTH OF RED WING...AND MOVING NORTHEAST
  AT 45 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  RIVER FALLS...
  ELLSWORTH...
  MENOMONIE...
  HAGER CITY...
  ESDAILE...
  BELDENVILLE...
  MARTEL...
  BALDWIN...
  SPRING VALLEY...
  WOODVILLE...
  ELMWOOD...
  HERSEY...
  WILSON...
  KNAPP...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4511 9194 4476 9174 4459 9256 4484 9274
TIME...MOT...LOC 2111Z 247DEG 38KT 4472 9258
WIND...HAIL <50MPH 1.00IN

$$

BAP
1 follow-up statement
060 
WWUS53 KMPX 262154
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
454 PM CDT SAT MAY 26 2012

WIC033-093-109-262215-
/O.CON.KMPX.SV.W.0094.000000T0000Z-120526T2215Z/
DUNN WI-ST. CROIX WI-PIERCE WI-
454 PM CDT SAT MAY 26 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
PIERCE...SOUTHEASTERN ST. CROIX AND SOUTHWESTERN DUNN COUNTIES UNTIL
515 PM CDT...

AT 449 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND DAMAGING
WINDS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES EAST OF ELLSWORTH...
MOVING NORTHEAST AT 45 MPH.

IN ADDITION...AT 450 PM THIS STORM PRODUCED HAIL THE SIZE OF 
QUARTERS THREE AND A HALF MILES SOUTHEAST OF ELLSWORTH.

LOCATIONS IMPACTED INCLUDE...
  MENOMONIE...SPRING VALLEY...WOODVILLE...ELMWOOD...HERSEY...        
  WILSON...KNAPP...BOYCEVILLE...WHEELER AND DOWNING...WAVERLY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE WINDOWS...SIDING AND VEHICLES. DAMAGING WINDS
ARE ALSO EXPECTED...WHICH CAN UPROOT TREES AND DOWN POWER LINES. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4464 9233 4491 9250 4511 9194 4476 9174
TIME...MOT...LOC 2154Z 247DEG 38KT 4475 9228
WIND...HAIL 60MPH 1.75IN

$$

BAP

The office that day

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

IssuedProductOfficeCountiesLasted
May 26, 2:15 PM CDTSevere Thunderstorm WarningMPXPepin, Pierce60 min
May 26, 3:09 PM CDTSpecial Weather StatementMPXPierce51 min
May 26, 3:19 PM CDTSpecial Weather StatementMPXPepin41 min
May 26, 3:33 PM CDTSevere Thunderstorm WarningMPXSaint Croix57 min
May 26, 5:09 PM CDTSevere Thunderstorm WarningMPXDunn, Eau Claire, Pepin, Pierce50 min
May 26, 5:51 PM CDTSevere Thunderstorm WarningMPXDunn, Eau Claire, Pepin24 min
May 26, 6:14 PM CDTSpecial Weather StatementMPXEau Claire46 min
May 26, 6:45 PM CDTSpecial Weather StatementMPXBarron60 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2012Every severe thunderstorm warning in 2012

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.