Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 33, NWS Twin Cities, MN

May 2, 2012Goodhue County, Minnesota; Pepin County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at May 2, 2012, 8:46 PM CDT for Goodhue County, Minnesota; Pepin County, Wisconsin. It was in force for 29 min. 2 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 2, 2012, 8:46 PM CDT (01:46 UTC)
Expired: May 2, 2012, 9:15 PM CDT
In force: 29 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Goodhue County, MN, Pepin County, WI

The radar

The La Crosse radar (KARX), 106 km from the middle of the area, began a volume at 01:46 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 2, 9:10 PM CDT	HAIL 1	Pepin, WI	BP EMPLOYEE REPORTED AT LEAST QUARTER SIZE HAIL WITH HEAVY RAIN.
May 2, 9:14 PM CDT	HAIL 1	7 Nw Wabasha, WI

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 2, 5:25 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.8 hours before the alert went out and 120 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: 84 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1937 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

132 
WUUS53 KMPX 030146
SVRMPX
MNC049-WIC091-030215-
/O.NEW.KMPX.SV.W.0033.120503T0146Z-120503T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
846 PM CDT WED MAY 2 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME EAST CENTRAL GOODHUE COUNTY IN SOUTHEAST MINNESOTA...
  SOUTHWESTERN PEPIN COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 915 PM CDT

* AT 842 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 LAKE CITY...AND MOVING EAST AT 30 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  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 LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4442 9213 4443 9221 4445 9225 4445 9237
      4446 9237 4449 9236 4453 9204 4452 9203
      4446 9205 4440 9209
TIME...MOT...LOC 0146Z 267DEG 28KT 4439 9225
WIND...HAIL 60MPH 1.00IN

$$

JRB

2 follow-up statements

037 
WWUS53 KMPX 030203
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
903 PM CDT WED MAY 2 2012

MNC049-030217-
/O.CAN.KMPX.SV.W.0033.000000T0000Z-120503T0215Z/
GOODHUE MN-
903 PM CDT WED MAY 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME EAST CENTRAL GOODHUE
COUNTY IS CANCELLED...

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

LAT...LON 4442 9213 4443 9221 4445 9226 4446 9225
      4449 9230 4453 9204 4452 9203 4446 9205
      4440 9209
TIME...MOT...LOC 0202Z 267DEG 28KT 4438 9207

$$

WIC091-030215-
/O.CON.KMPX.SV.W.0033.000000T0000Z-120503T0215Z/
PEPIN WI-
903 PM CDT WED MAY 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
PEPIN COUNTY UNTIL 915 PM CDT...

AT 900 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE 
THUNDERSTORM WITH A HISTORY OF PRODUCING GOLF BALL SIZE HAIL...AND 
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR 
WABASHA...MOVING EAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4442 9213 4443 9221 4445 9226 4446 9225
      4449 9230 4453 9204 4452 9203 4446 9205
      4440 9209
TIME...MOT...LOC 0202Z 267DEG 28KT 4438 9207
WIND...HAIL 60MPH 1.75IN

$$

JRB

059 
WWUS53 KMPX 030220
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
920 PM CDT WED MAY 2 2012

WIC091-030235-
/O.EXP.KMPX.SV.W.0033.000000T0000Z-120503T0215Z/
PEPIN WI-
920 PM CDT WED MAY 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN PEPIN COUNTY HAS
EXPIRED...

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

LAT...LON 4442 9213 4443 9221 4445 9226 4446 9225
      4449 9230 4453 9204 4452 9203 4446 9205
      4440 9209
TIME...MOT...LOC 0203Z 267DEG 28KT 4437 9206

$$

JRB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 2, 7:12 PM CDT	Severe Thunderstorm Warning	MPX	Brown	63 min
May 2, 7:29 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	61 min
May 2, 7:30 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue, Rice, Steele	60 min
May 2, 7:32 PM CDT	Tornado Warning	MPX	Rice, Steele, Waseca	28 min
May 2, 7:51 PM CDT	Areal Flood Advisory	MPX	Goodhue, Rice	3 hr
May 2, 7:58 PM CDT	Special Weather Statement	MPX	Nicollet	62 min
May 2, 8:22 PM CDT	Flash Flood Warning	MPX	Goodhue	3 hr
May 2, 8:27 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	33 min
May 2, 9:08 PM CDT	Special Weather Statement	MPX	Lac qui Parle	52 min
May 2, 9:25 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Swift	50 min
May 2, 10:01 PM CDT	Tornado Warning	MPX	Chippewa, Lac qui Parle	44 min
May 2, 10:12 PM CDT	Severe Thunderstorm Warning	MPX	Pope, Stevens, Swift	48 min
May 2, 10:25 PM CDT	Tornado Warning	MPX	Chippewa, Lac qui Parle	35 min
May 2, 10:55 PM CDT	Severe Thunderstorm Warning	MPX	Pope, Swift	50 min
May 2, 11:00 PM CDT	Tornado Warning	MPX	Chippewa	45 min
May 2, 11:46 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi	59 min
May 3, 12:47 AM CDT	Special Weather Statement	MPX	Meeker, Stearns	58 min
May 3, 1:05 AM CDT	Severe Thunderstorm Warning	MPX	Meeker	55 min
May 3, 1:59 AM CDT	Special Weather Statement	MPX	Anoka, Carver, Hennepin, Sherburne, Wright	76 min
May 3, 6:24 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Todd	36 min
May 3, 6:49 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Morrison, Todd	41 min
May 3, 7:34 AM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison	41 min
May 3, 7:57 AM CDT	Special Weather Statement	MPX	Scott	48 min
May 3, 8:31 AM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Rice, Scott	59 min
May 3, 9:00 AM CDT	Special Weather Statement	MPX	Wright	45 min
May 3, 9:37 AM CDT	Special Weather Statement	MPX	Anoka, Carver, Hennepin, Ramsey	38 min
May 3, 10:12 AM CDT	Special Weather Statement	MPX	Le Sueur	48 min
May 3, 10:22 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Washington	56 min
May 3, 10:36 AM CDT	Severe Thunderstorm Warning	MPX	Washington	30 min
May 3, 10:55 AM CDT	Special Weather Statement	MPX	Goodhue, Rice	50 min
May 3, 3:05 PM CDT	Special Weather Statement	MPX	Steele, Waseca	40 min
May 3, 3:37 PM CDT	Special Weather Statement	MPX	Steele	38 min
May 3, 4:25 PM CDT	Special Weather Statement	MPX	Faribault	50 min
May 3, 6:19 PM CDT	Special Weather Statement	MPX	Waseca	26 min
May 3, 6:30 PM CDT	Severe Thunderstorm Warning	MPX	Waseca	20 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, 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, 11:14 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Dunn, 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 Minnesota, 2012 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.