Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 206, NWS Twin Cities, MN

July 30, 2011Goodhue County, Minnesota; Pepin County, Pierce County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 30, 2011, 11:55 PM CDT for Goodhue County, Minnesota; Pepin County, Pierce County, Wisconsin. It was in force for 35 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: Jul 30, 2011, 11:55 PM CDT (04:55 UTC)
Expired: Jul 31, 2011, 12:30 AM CDT
In force: 35 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Goodhue County, MN, Pepin County, WI, Pierce County, WI

The radar

The Minneapolis radar (KMPX), 102 km from the middle of the area, began a volume at 04:57 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 00:00Z, 4.9 hours before the alert went out and 105 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: 2387 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1239 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 176 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 8.4

Open this sounding in Storm Lab

The text

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

216 
WUUS53 KMPX 310455
SVRMPX
MNC049-WIC091-093-310530-
/O.NEW.KMPX.SV.W.0206.110731T0455Z-110731T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1155 PM CDT SAT JUL 30 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN GOODHUE COUNTY IN SOUTHEAST MINNESOTA...
  SOUTHWESTERN PEPIN COUNTY IN WEST CENTRAL WISCONSIN...
  SOUTH CENTRAL PIERCE COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 1230 AM CDT

* AT 1152 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM BAY CITY TO
  GOODHUE...AND MOVING SOUTHEAST AT 40 MPH.  NICKEL SIZE HAIL MAY
  ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IN THE WARNING INCLUDE...
  BAY CITY...
  ESDAILE...
  GOODHUE...
  MAIDEN ROCK...
  FRONTENAC...
  BELLECHESTER...
  STOCKHOLM...
  PEPIN...

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.

REPORT ANY SIGNIFICANT WIND OR HAIL DAMAGE TO THE NEAREST LAW
ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4450 9272 4465 9245 4449 9205 4440 9209
      4443 9221 4445 9225 4445 9241 4437 9242
      4436 9245 4436 9254 4428 9254 4428 9256
TIME...MOT...LOC 0455Z 330DEG 36KT 4457 9239 4444 9264
WIND...HAIL 60MPH 0.88IN

$$

3 follow-up statements

982 
WWUS53 KMPX 310503
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1203 AM CDT SUN JUL 31 2011

MNC049-WIC091-093-310530-
/O.CON.KMPX.SV.W.0206.000000T0000Z-110731T0530Z/
GOODHUE MN-PEPIN WI-PIERCE WI-
1203 AM CDT SUN JUL 31 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
PIERCE...SOUTHWESTERN PEPIN AND EASTERN GOODHUE COUNTIES UNTIL 1230
AM CDT...

AT 1201 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM MAIDEN
ROCK TO GOODHUE...MOVING SOUTHEAST AT 35 MPH. NICKEL SIZE HAIL MAY
ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  FRONTENAC...BELLECHESTER...STOCKHOLM AND PEPIN.

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.

THIS STORM HAS EXHIBITED SOME WEAK ROTATION JUST WEST OF FRONTENAC. 
TORNADOES CAN DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH 
ONE IS 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.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.

&&

LAT...LON 4450 9272 4465 9245 4449 9205 4440 9209
      4443 9221 4445 9225 4445 9241 4437 9242
      4436 9245 4436 9254 4428 9254 4428 9256
TIME...MOT...LOC 0503Z 323DEG 30KT 4456 9233 4439 9258
WIND...HAIL 60MPH 0.88IN

$$

618 
WWUS53 KMPX 310514
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1214 AM CDT SUN JUL 31 2011

MNC049-WIC091-093-310530-
/O.CON.KMPX.SV.W.0206.000000T0000Z-110731T0530Z/
GOODHUE MN-PEPIN WI-PIERCE WI-
1214 AM CDT SUN JUL 31 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
PIERCE...SOUTHWESTERN PEPIN AND EASTERN GOODHUE COUNTIES UNTIL 1230
AM CDT...

AT 1214 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM MAIDEN
ROCK TO BELLECHESTER...MOVING SOUTHEAST AT 35 MPH. PENNY SIZE HAIL
MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  STOCKHOLM AND PEPIN.

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.

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS 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.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.

&&

LAT...LON 4444 9268 4453 9253 4464 9243 4449 9205
      4440 9209 4443 9221 4445 9225 4445 9241
      4437 9242 4436 9245 4436 9254 4428 9254
      4428 9256
TIME...MOT...LOC 0514Z 323DEG 30KT 4452 9226 4435 9251
WIND...HAIL 60MPH 0.75IN

$$

422 
WWUS53 KMPX 310521
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1221 AM CDT SUN JUL 31 2011

MNC049-WIC091-093-310530-
/O.CON.KMPX.SV.W.0206.000000T0000Z-110731T0530Z/
GOODHUE MN-PEPIN WI-PIERCE WI-
1221 AM CDT SUN JUL 31 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
PIERCE...SOUTHWESTERN PEPIN AND EAST CENTRAL GOODHUE COUNTIES UNTIL
1230 AM CDT...

AT 1221 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
STOCKHOLM TO BELLECHESTER...MOVING SOUTHEAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  STOCKHOLM AND PEPIN.

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.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.

&&

LAT...LON 4428 9256 4443 9252 4461 9235 4449 9205
      4440 9209 4443 9221 4445 9225 4445 9241
      4437 9242 4436 9245 4436 9254 4428 9254
TIME...MOT...LOC 0521Z 323DEG 30KT 4452 9225 4432 9247
WIND...HAIL 60MPH <.75IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 7:10 PM CDT	Tornado Warning	MPX	Todd	50 min
Jul 30, 7:15 PM CDT	Severe Thunderstorm Warning	MPX	Douglas	30 min
Jul 30, 7:28 PM CDT	Areal Flood Advisory	MPX	Todd	3 hr
Jul 30, 7:42 PM CDT	Severe Thunderstorm Warning	MPX	Todd	63 min
Jul 30, 7:45 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec	45 min
Jul 30, 8:01 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec, Mille Lacs	29 min
Jul 30, 8:15 PM CDT	Severe Thunderstorm Warning	MPX	Stearns	60 min
Jul 30, 8:18 PM CDT	Severe Thunderstorm Warning	MPX	Isanti, Kanabec, Mille Lacs	72 min
Jul 30, 8:22 PM CDT	Tornado Warning	MPX	Isanti, Kanabec, Mille Lacs	38 min
Jul 30, 8:50 PM CDT	Severe Thunderstorm Warning	MPX	Isanti	55 min
Jul 30, 8:53 PM CDT	Tornado Warning	MPX	Isanti	35 min
Jul 30, 8:56 PM CDT	Areal Flood Advisory	MPX	Anoka, Isanti, Kanabec, Mille Lacs, Sherburne	6 hr
Jul 30, 9:07 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Stearns	38 min
Jul 30, 9:20 PM CDT	Severe Thunderstorm Warning	MPX	Anoka	55 min
Jul 30, 9:48 PM CDT	Special Weather Statement	MPX	McLeod, Meeker	42 min
Jul 30, 9:50 PM CDT	Severe Thunderstorm Warning	MPX	Ramsey, Washington	55 min
Jul 30, 9:54 PM CDT	Areal Flood Advisory	MPX	Anoka, Dakota, Hennepin, Ramsey, Washington	6 hr
Jul 30, 10:21 PM CDT	Severe Thunderstorm Warning	MPX	Anoka	39 min
Jul 30, 11:20 PM CDT	Special Weather Statement	MPX	Le Sueur	40 min
Jul 30, 11:26 PM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Scott, Sibley	31 min
Jul 30, 11:32 PM CDT	Special Weather Statement	MPX	Goodhue	43 min
Jul 31, 4:00 PM CDT	Heat Advisory	MPX	Anoka, Blue Earth, Brown, Carver, Chippewa, Dakota and 29 more	28 hr
Jul 30, 9:43 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Polk	47 min
Jul 30, 10:44 PM CDT	Special Weather Statement	MPX	Barron	46 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2011 Severe Thunderstorm Warnings in Minnesota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.