Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 45, NWS Twin Cities, MN

May 3, 2012Chippewa County, Dunn County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at May 3, 2012, 11:14 AM CDT for Chippewa County, Dunn County, Saint Croix County, Wisconsin. It was in force for 61 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 3, 2012, 11:14 AM CDT (16:14 UTC)
Expired: May 3, 2012, 12:15 PM CDT
In force: 61 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Chippewa County, WI, Dunn County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 137 km from the middle of the area, began a volume at 16:15 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 4.2 hours before the alert went out and 140 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: 1755 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 521 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

944 
WUUS53 KMPX 031614
SVRMPX
WIC017-033-109-031715-
/O.NEW.KMPX.SV.W.0045.120503T1614Z-120503T1715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1114 AM CDT THU MAY 3 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN CHIPPEWA COUNTY IN WEST CENTRAL WISCONSIN...
  NORTHERN DUNN COUNTY IN WEST CENTRAL WISCONSIN...
  NORTHEASTERN ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 1215 PM CDT

* AT 1111 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS OF 60 MPH. THIS
  STORM WAS LOCATED NEAR GLENWOOD CITY...OR ABOUT 17 MILES SOUTHEAST
  OF AMERY...AND MOVING SOUTHEAST AT 35 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  CONNORSVILLE...
  MENOMONIE...
  EMERALD...
  FOREST...
  GLENWOOD CITY...
  BOYCEVILLE...
  KNAPP...
  WHEELER...
  TAINTER LAKE...
  COLFAX...
  ELK MOUND...

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.

&&

LAT...LON 4486 9159 4486 9165 4477 9166 4502 9231
      4521 9222 4521 9219 4510 9148
TIME...MOT...LOC 1614Z 299DEG 29KT 4509 9216
WIND...HAIL 60MPH 1.00IN

$$

2 follow-up statements

272 
WWUS53 KMPX 031638
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1138 AM CDT THU MAY 3 2012

WIC109-031653-
/O.CAN.KMPX.SV.W.0045.000000T0000Z-120503T1715Z/
ST. CROIX WI-
1138 AM CDT THU MAY 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ST. CROIX COUNTY
IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT
OF THE WARNED AREA.

LAT...LON 4495 9212 4515 9206 4518 9199 4510 9148
      4486 9159 4486 9165 4477 9166
TIME...MOT...LOC 1638Z 299DEG 29KT 4503 9187

$$

WIC017-033-031715-
/O.CON.KMPX.SV.W.0045.000000T0000Z-120503T1715Z/
CHIPPEWA WI-DUNN WI-
1138 AM CDT THU MAY 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL DUNN
AND SOUTHWESTERN CHIPPEWA COUNTIES UNTIL 1215 PM CDT...

AT 1137 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
WINDS OF 60 MPH.  THIS STORM WAS LOCATED NEAR WHEELER...OR 10 MILES
NORTH OF MENOMONIE...MOVING SOUTHEAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  MENOMONIE...TAINTER LAKE...COLFAX AND ELK MOUND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4495 9212 4515 9206 4518 9199 4510 9148
      4486 9159 4486 9165 4477 9166
TIME...MOT...LOC 1638Z 299DEG 29KT 4503 9187
WIND...HAIL 60MPH 1.00IN

$$

493 
WWUS53 KMPX 031711
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1211 PM CDT THU MAY 3 2012

WIC017-033-031726-
/O.EXP.KMPX.SV.W.0045.000000T0000Z-120503T1715Z/
CHIPPEWA WI-DUNN WI-
1211 PM CDT THU MAY 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL DUNN AND SOUTHWESTERN
CHIPPEWA COUNTIES WILL EXPIRE AT 1215 PM CDT...

THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED AND MOVED OUT OF
THE WARNED AREA...HOWEVER SMALL HAIL AND GUSTY WINDS OF 40 TO 50 MPH 
ARE STILL POSSIBLE WITH THE LINE OF THUNDERSTORMS.

LAT...LON 4495 9212 4515 9206 4518 9199 4510 9148
      4486 9159 4486 9165 4477 9166
TIME...MOT...LOC 1711Z 299DEG 29KT 4490 9154

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 2, 8:46 PM CDT	Severe Thunderstorm Warning	MPX	Pepin	29 min
May 2, 9:50 PM CDT	Special Weather Statement	MPX	Eau Claire	40 min
May 3, 3:37 AM CDT	Special Weather Statement	MPX	Polk	38 min
May 3, 3:51 AM CDT	Special Weather Statement	MPX	Barron, Polk	39 min
May 3, 5:14 AM CDT	Special Weather Statement	MPX	Chippewa, Rusk	46 min
May 3, 9:37 AM CDT	Special Weather Statement	MPX	Polk	38 min
May 3, 10:22 AM CDT	Severe Thunderstorm Warning	MPX	Pierce, Saint Croix	56 min
May 3, 10:36 AM CDT	Severe Thunderstorm Warning	MPX	Saint Croix	30 min
May 3, 10:45 AM CDT	Special Weather Statement	MPX	Polk	45 min
May 3, 10:59 AM CDT	Special Weather Statement	MPX	Barron, Dunn, Pepin, Pierce, Saint Croix	61 min
May 3, 12:09 PM CDT	Special Weather Statement	MPX	Chippewa, Eau Claire	66 min
May 3, 6:51 PM CDT	Severe Thunderstorm Warning	MPX	Dunn, Pierce	24 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2012 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.