Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 244, NWS Twin Cities, MN

August 3, 20125 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 3, 2012, 8:20 PM CDT for 5 counties in Minnesota. It was in force for 55 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
Aug 3, 2012, 8:20 PM CDT (01:20 UTC)
Expired
Aug 3, 2012, 9:15 PM CDT
In force
55 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
65.0 mph

Counties Chippewa County, MN, Lac qui Parle County, MN, Renville County, MN, Swift County, MN, Yellow Medicine County, MN

The radar

The Sioux Falls radar (KFSD), 167 km from the middle of the area, began a volume at 01:22 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

TimeReportWhereRemark
Aug 3, 9:00 PM CDTTSTM WND DMGClontarf, MNSEVERAL LARGE TREES DOWN. REPORT RELAYED VIA LAW ENFORCEMENT.

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.

IssuedProductOfficeLasted
Aug 3, 7:33 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.3 hours before the alert went out and 176 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2012-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 576 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2012-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
576 J/kg
Mixed-layer CIN
-95 J/kg
Mixed-layer LCL
1840 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
257 m²/s²
Significant tornado parameter
0.1
Supercell composite
7.5

Open this sounding in Storm Lab

The text

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

560 
WUUS53 KMPX 040120
SVRMPX
MNC023-073-129-151-173-040215-
/O.NEW.KMPX.SV.W.0244.120804T0120Z-120804T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
820 PM CDT FRI AUG 3 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHIPPEWA COUNTY IN WEST CENTRAL MINNESOTA...
  EASTERN LAC QUI PARLE COUNTY IN WEST CENTRAL MINNESOTA...
  NORTHWESTERN RENVILLE COUNTY IN CENTRAL MINNESOTA...
  SWIFT COUNTY IN WEST CENTRAL MINNESOTA...
  YELLOW MEDICINE COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 915 PM CDT

* AT 815 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING DAMAGING WINDS OF 65 MPH. THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM APPLETON TO 8 MILES EAST OF
  MADISON TO PROVIDENCE TO CANBY...AND MOVING EAST AT 45 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MONTEVIDEO...
  BENSON...
  GRANITE FALLS...
  APPLETON...
  PROVIDENCE...
  ST LEO...
  MILAN...
  HOLLOWAY...
  BOYD...
  WATSON...
  BIG BEND CITY...
  CLARKFIELD...
  DANVERS...
  SPRING CREEK...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4480 9615 4520 9613 4522 9611 4524 9612
      4541 9611 4541 9535 4496 9533 4479 9535
      4459 9554 4459 9561 4462 9562 4462 9631
TIME...MOT...LOC 0120Z 268DEG 37KT 4526 9600 4498 9596
          4482 9597 4469 9612
WIND...HAIL 65MPH <.75IN

$$
SPD
2 follow-up statements
060 
WWUS53 KMPX 040130
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
830 PM CDT FRI AUG 3 2012

MNC023-073-129-151-173-040215-
/O.CON.KMPX.SV.W.0244.000000T0000Z-120804T0215Z/
LAC QUI PARLE MN-CHIPPEWA MN-RENVILLE MN-SWIFT MN-YELLOW MEDICINE MN-
830 PM CDT FRI AUG 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
RENVILLE COUNTY IN CENTRAL MINNESOTA...AND YELLOW MEDICINE...SWIFT...
CHIPPEWA AND EASTERN LAC QUI PARLE COUNTIES IN WEST CENTRAL MINNESOTA
UNTIL 915 PM CDT...

AT 828 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS OF 65 MPH. 
THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM HOLLOWAY TO
WATSON TO BOYD TO ST LEO...MOVING EAST AT 45 MPH.

IN ADDITION...NEARLY 65 MPH WIND GUSTS WAS REPORTED AT ORTONVILLE AT 
814 PM WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
  MONTEVIDEO...BENSON...GRANITE FALLS...BIG BEND CITY...CLARKFIELD...
  DANVERS...SPRING CREEK...CLONTARF...HAZEL RUN...GLUEK...HANLEY
  FALLS...MAYNARD...DE GRAFF...MINNESOTA FALLS AND WOOD LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4480 9615 4520 9613 4522 9611 4524 9612
      4541 9611 4541 9535 4496 9533 4479 9535
      4459 9554 4459 9561 4462 9562 4462 9631
TIME...MOT...LOC 0129Z 268DEG 37KT 4526 9587 4498 9583
          4482 9584 4469 9599
WIND...HAIL 60MPH <.75IN

$$
SPD/DE
756 
WWUS53 KMPX 040155
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
855 PM CDT FRI AUG 3 2012

MNC023-073-129-151-173-040215-
/O.CON.KMPX.SV.W.0244.000000T0000Z-120804T0215Z/
LAC QUI PARLE MN-CHIPPEWA MN-RENVILLE MN-SWIFT MN-YELLOW MEDICINE MN-
855 PM CDT FRI AUG 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
RENVILLE COUNTY IN CENTRAL MINNESOTA...AND EASTERN YELLOW MEDICINE...
CENTRAL SWIFT...CHIPPEWA AND SOUTHEASTERN LAC QUI PARLE COUNTIES IN
WEST CENTRAL MINNESOTA UNTIL 915 PM CDT...

AT 853 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS OF 60 MPH. 
THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM DE GRAFF TO
GLUEK TO GRANITE FALLS TO HANLEY FALLS...MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  MINNESOTA FALLS...WOOD LAKE...CLARA CITY...SWIFT FALLS AND MURDOCK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4463 9612 4499 9590 4516 9589 4525 9589
      4540 9594 4541 9535 4496 9533 4479 9535
      4459 9554 4459 9561 4462 9562
TIME...MOT...LOC 0155Z 268DEG 37KT 4527 9549 4499 9545
          4483 9546 4470 9561
WIND...HAIL 60MPH <.75IN

$$
SPD

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 7:14 PM CDTSpecial Weather StatementMPXChippewa, Lac qui Parle, Swift, Yellow Medicine46 min
Aug 3, 7:37 PM CDTSevere Thunderstorm WarningMPXLac qui Parle, Yellow Medicine53 min
Aug 3, 8:26 PM CDTSevere Thunderstorm WarningMPXDouglas, Pope, Stevens49 min
Aug 3, 9:01 PM CDTSevere Thunderstorm WarningMPXBrown, Redwood, Renville, Yellow Medicine59 min
Aug 3, 9:07 PM CDTSevere Thunderstorm WarningMPXChippewa, Kandiyohi, Meeker, Pope, Renville, Stearns and 2 more53 min
Aug 3, 9:47 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Brown, McLeod, Nicollet, Redwood, Renville and 1 more58 min
Aug 3, 9:52 PM CDTSevere Thunderstorm WarningMPXMcLeod, Meeker, Renville, Sherburne, Stearns, Wright38 min
Aug 3, 10:25 PM CDTSpecial Weather StatementMPXAnoka, Carver, Hennepin, McLeod, Sherburne, Wright65 min
Aug 3, 10:29 PM CDTSpecial Weather StatementMPXLe Sueur, Nicollet, Rice, Scott61 min
Aug 3, 10:39 PM CDTSevere Thunderstorm WarningMPXCarver, Hennepin36 min
Aug 3, 10:44 PM CDTSevere Thunderstorm WarningMPXAnoka, Benton, Isanti, Mille Lacs, Sherburne, Wright46 min
Aug 3, 10:54 PM CDTSevere Thunderstorm WarningMPXAnoka, Carver, Hennepin, Sherburne, Wright25 min
Aug 3, 11:01 PM CDTSpecial Weather StatementMPXBlue Earth, Faribault, Freeborn, Martin, Steele, Waseca44 min
Aug 3, 11:06 PM CDTSevere Thunderstorm WarningMPXAnoka, Carver, Chisago, Dakota, Hennepin, Ramsey and 2 more39 min
Aug 3, 11:12 PM CDTSevere Thunderstorm WarningMPXAnoka, Chisago, Isanti33 min
Aug 3, 11:18 PM CDTSevere Thunderstorm WarningMPXDakota, Goodhue, Rice, Scott, Washington42 min
Aug 3, 11:38 PM CDTSevere Thunderstorm WarningMPXChisago, Washington67 min
Aug 3, 11:44 PM CDTSevere Thunderstorm WarningMPXDakota, Goodhue, Washington61 min
Aug 4, 12:19 AM CDTSpecial Weather StatementMPXBrown26 min
Aug 4, 1:13 AM CDTSpecial Weather StatementMPXMartin47 min
Aug 4, 1:25 AM CDTSevere Thunderstorm WarningMPXFaribault, Martin65 min
Aug 4, 4:28 AM CDTSpecial Weather StatementMPXFaribault47 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012Every 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.