Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 51, NWS Twin Cities, MN

May 22, 2011Dunn County, Pierce County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at May 22, 2011, 2:41 PM CDT for Dunn County, Pierce County, Saint Croix County, Wisconsin. It was in force for 49 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: May 22, 2011, 2:41 PM CDT (19:41 UTC)
Expired: May 22, 2011, 3:30 PM CDT
In force: 49 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The Minneapolis radar (KMPX), 104 km from the middle of the area, began a volume at 19:42 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
May 22, 3:12 PM CDT	HAIL 1	4 Nw Elmwood, WI
May 22, 3:14 PM CDT	HAIL 1.5	3 W Elmwood, WI
May 22, 3:15 PM CDT	HAIL 1.75	Elmwood, WI	HAD PING PONG TO GOLF BALL SIZE HAIL IN ELMWOOD. ALSO HAD GUSTY WINDS...BUT NO REPORTS OF WIND DAMAGE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 22, 12:07 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.7 hours before the alert went out and 107 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: 20 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 981 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 207 m²/s²
0-3 km storm-relative helicity: 243 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

975 
WUUS53 KMPX 221941
SVRMPX
WIC033-093-109-222030-
/O.NEW.KMPX.SV.W.0051.110522T1941Z-110522T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
241 PM CDT SUN MAY 22 2011

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 330 PM CDT

* AT 237 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.
  THIS STORM WAS LOCATED NEAR HAGER CITY...OR ABOUT OVER RED WING...
  AND MOVING NORTHEAST AT 50 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  ELLSWORTH...
  BAY CITY...
  ESDAILE...
  MAIDEN ROCK...
  BELDENVILLE...
  PLUM CITY...
  MARTEL...
  ELMWOOD...
  SPRING VALLEY...
  HAMMOND...
  BALDWIN...
  WOODVILLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH AND LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

THIS STORM HAS A HISTORY OF PRODUCING LARGE DAMAGING HAIL. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY EVENING FOR
SOUTHEASTERN MINNESOTA AND NORTHWESTERN WISCONSIN.

&&

LAT...LON 4468 9204 4468 9213 4455 9215 4454 9220
      4454 9232 4456 9234 4457 9250 4461 9260
      4465 9264 4504 9243 4483 9191
TIME...MOT...LOC 1941Z 215DEG 42KT 4459 9250
WIND...HAIL 60MPH 1.00IN

$$

1 follow-up statement

425 
WWUS53 KMPX 222010
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
310 PM CDT SUN MAY 22 2011

WIC033-093-109-222030-
/O.CON.KMPX.SV.W.0051.000000T0000Z-110522T2030Z/
ST. CROIX WI-DUNN WI-PIERCE WI-
310 PM CDT SUN MAY 22 2011

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

AT 305 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES SOUTH OF
SPRING VALLEY...OR 11 MILES EAST OF ELLSWORTH...MOVING NORTHEAST AT
40 MPH.

LOCATIONS IMPACTED INCLUDE...
  ELMWOOD...HAMMOND...SPRING VALLEY...BALDWIN AND WOODVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4469 9211 4468 9213 4466 9214 4466 9219
      4473 9243 4484 9253 4504 9243 4486 9199
TIME...MOT...LOC 2010Z 222DEG 36KT 4481 9222
WIND...HAIL 60MPH 1.00IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 10:57 AM CDT	Special Weather Statement	MPX	Pierce	48 min
May 22, 11:28 AM CDT	Special Weather Statement	MPX	Dunn, Pierce, Saint Croix	47 min
May 22, 12:05 PM CDT	Special Weather Statement	MPX	Barron, Dunn, Polk, Saint Croix	40 min
May 22, 12:58 PM CDT	Special Weather Statement	MPX	Barron, Chippewa, Rusk	47 min
May 22, 1:16 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Rusk	44 min
May 22, 2:55 PM CDT	Tornado Warning	MPX	Dunn, Pierce, Saint Croix	35 min
May 22, 3:22 PM CDT	Severe Thunderstorm Warning	MPX	Dunn	38 min
May 22, 3:34 PM CDT	Tornado Warning	MPX	Polk	41 min
May 22, 3:44 PM CDT	Special Weather Statement	MPX	Chippewa, Dunn, Eau Claire, Pepin	46 min
May 22, 4:16 PM CDT	Special Weather Statement	MPX	Rusk	29 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2011 Every severe thunderstorm warning in 2011

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.