Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 86, NWS Twin Cities, MN

May 24, 2012Dunn County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at May 24, 2012, 3:45 PM CDT for Dunn County, Wisconsin. It was in force for 30 min. 1 report 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 24, 2012, 3:45 PM CDT (20:45 UTC)
Expired: May 24, 2012, 4:15 PM CDT
In force: 30 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

County Dunn County, WI

The radar

The La Crosse radar (KARX), 133 km from the middle of the area, began a volume at 20:46 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 24, 3:50 PM CDT	TSTM WND DMG	1 N Eau Galle, WI	NUMEROUS TREES DOWN.

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 24, 2:22 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.8 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: 13 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 668 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 6 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.

775 
WUUS53 KMPX 242045
SVRMPX
WIC033-242115-
/O.NEW.KMPX.SV.W.0086.120524T2045Z-120524T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
345 PM CDT THU MAY 24 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DUNN COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 415 PM CDT

* AT 340 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING DAMAGING WINDS OF 60 MPH. THIS STORM WAS LOCATED 7 MILES
  SOUTHWEST OF MENOMONIE...AND MOVING NORTHEAST AT 75 MPH.  NICKEL
  SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IN THE WARNING INCLUDE...
  MENOMONIE...
  EAU GALLE...
  KNAPP...
  ELK MOUND...
  BOYCEVILLE...
  TAINTER LAKE...
  WHEELER...
  COLFAX...
  RIDGELAND...
  SAND CREEK...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT THURSDAY EVENING
FOR SOUTHEAST MINNESOTA AND NORTHWESTERN WISCONSIN.

&&

LAT...LON 4486 9166 4474 9180 4468 9198 4469 9214
      4482 9214 4521 9204 4521 9167 4513 9167
      4512 9165 4488 9164
TIME...MOT...LOC 2045Z 209DEG 63KT 4489 9194
WIND...HAIL 60MPH 0.88IN

$$

2 follow-up statements

942 
WWUS53 KMPX 242059
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
359 PM CDT THU MAY 24 2012

WIC033-242115-
/O.CON.KMPX.SV.W.0086.000000T0000Z-120524T2115Z/
DUNN WI-
359 PM CDT THU MAY 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR DUNN COUNTY
UNTIL 415 PM CDT...

AT 354 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS OF 60 MPH.  THIS
STORM WAS LOCATED NEAR TAINTER LAKE...OR 8 MILES NORTH OF
MENOMONIE...MOVING NORTHEAST AT 70 MPH. NICKEL SIZE HAIL MAY ALSO
ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  RIDGELAND AND SAND CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 4474 9180 4471 9198 4490 9204 4495 9207
      4521 9204 4521 9167 4513 9167 4512 9165
      4486 9166
TIME...MOT...LOC 2058Z 209DEG 63KT 4505 9181
WIND...HAIL 60MPH 0.88IN

$$

325 
WWUS53 KMPX 242106
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
406 PM CDT THU MAY 24 2012

WIC033-242115-
/O.CON.KMPX.SV.W.0086.000000T0000Z-120524T2115Z/
DUNN WI-
406 PM CDT THU MAY 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN DUNN
COUNTY UNTIL 415 PM CDT...

AT 402 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS OF 60 MPH.  THIS
STORM WAS LOCATED 5 MILES SOUTHWEST OF SAND CREEK...OR 17 MILES
NORTHEAST OF MENOMONIE...MOVING NORTHEAST AT 70 MPH. PENNY SIZE HAIL
MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF EXTREME NORTHEASTERN DUNN COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 4474 9180 4484 9187 4503 9190 4521 9204
      4521 9167 4513 9167 4512 9165 4486 9166
TIME...MOT...LOC 2106Z 209DEG 63KT 4517 9171
WIND...HAIL 60MPH 0.75IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 3:50 AM CDT	Wind Advisory	MPX	Chippewa, Eau Claire, Rusk	14 hr
May 24, 8:17 AM CDT	Special Weather Statement	MPX	Barron, Chippewa, Dunn, Pepin, Rusk	73 min
May 24, 8:57 AM CDT	Special Weather Statement	MPX	Saint Croix	63 min
May 24, 10:41 AM CDT	Severe Thunderstorm Warning	MPX	Pierce	27 min
May 24, 11:23 AM CDT	Special Weather Statement	MPX	Pierce	52 min
May 24, 12:24 PM CDT	Special Weather Statement	MPX	Dunn	51 min
May 24, 12:58 PM CDT	Special Weather Statement	MPX	Polk	32 min
May 24, 1:32 PM CDT	Special Weather Statement	MPX	Chippewa, Rusk	58 min
May 24, 2:14 PM CDT	Special Weather Statement	MPX	Pierce	31 min
May 24, 3:06 PM CDT	Special Weather Statement	MPX	Barron, Dunn, Pepin	54 min
May 24, 4:03 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Dunn, Eau Claire, Pepin	57 min
May 24, 4:13 PM CDT	Special Weather Statement	MPX	Rusk	47 min
May 24, 4:55 PM CDT	Severe Thunderstorm Warning	MPX	Eau Claire	35 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.