Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 247, NWS Twin Cities, MN

August 3, 20128 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 3, 2012, 9:07 PM CDT for 8 counties in Minnesota. It was in force for 53 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, 9:07 PM CDT (02:07 UTC)
Expired
Aug 3, 2012, 10:00 PM CDT
In force
53 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Chippewa County, MN, Kandiyohi County, MN, Meeker County, MN, Pope County, MN, Renville County, MN, Stearns County, MN, Swift County, MN, Yellow Medicine County, MN

The radar

The Minneapolis radar (KMPX), 139 km from the middle of the area, began a volume at 02:09 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, 10:00 PM CDTTSTM WND DMGRichmond, MNFEW 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.

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

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.1 hours before the alert went out and 137 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.

195 
WUUS53 KMPX 040207
SVRMPX
MNC023-067-093-121-129-145-151-173-040300-
/O.NEW.KMPX.SV.W.0247.120804T0207Z-120804T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
907 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...
  KANDIYOHI COUNTY IN CENTRAL MINNESOTA...
  WESTERN MEEKER COUNTY IN CENTRAL MINNESOTA...
  SOUTHERN POPE COUNTY IN WEST CENTRAL MINNESOTA...
  NORTHERN RENVILLE COUNTY IN CENTRAL MINNESOTA...
  SOUTHWESTERN STEARNS COUNTY IN CENTRAL MINNESOTA...
  EASTERN SWIFT COUNTY IN WEST CENTRAL MINNESOTA...
  NORTHEASTERN YELLOW MEDICINE COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 1000 PM CDT

* AT 905 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING DAMAGING WINDS OF 60 MPH. THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 9 MILES SOUTHWEST OF SEDAN TO
  RAYMOND TO COTTONWOOD...AND MOVING EAST AT 50 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  GRANITE FALLS...
  BENSON...
  MONTEVIDEO...
  WILLMAR...
  OLIVIA...
  LITCHFIELD...
  KERKHOVEN...
  CLARA CITY...
  MAYNARD...
  GLUEK...
  DE GRAFF...
  HAZEL RUN...
  CLONTARF...
  DANVERS...

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.

&&

LAT...LON 4489 9576 4489 9573 4495 9574 4506 9570
      4541 9583 4541 9574 4554 9575 4566 9453
      4518 9444 4498 9447 4498 9450 4472 9450
      4471 9582
TIME...MOT...LOC 0207Z 251DEG 45KT 4547 9532 4505 9529
          4461 9556
WIND...HAIL 60MPH <.75IN

$$
SPD
2 follow-up statements
980 
WWUS53 KMPX 040221
SVSMPX

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

MNC023-067-093-121-129-145-151-173-040300-
/O.CON.KMPX.SV.W.0247.000000T0000Z-120804T0300Z/
CHIPPEWA MN-KANDIYOHI MN-MEEKER MN-POPE MN-RENVILLE MN-STEARNS MN-
SWIFT MN-YELLOW MEDICINE MN-
921 PM CDT FRI AUG 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
STEARNS...NORTHERN RENVILLE...WESTERN MEEKER AND KANDIYOHI COUNTIES
IN CENTRAL MINNESOTA...AND NORTHEASTERN YELLOW MEDICINE...EASTERN
SWIFT...SOUTHEASTERN POPE AND EASTERN CHIPPEWA COUNTIES IN WEST
CENTRAL MINNESOTA UNTIL 1000 PM CDT...

AT 917 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 7 MILES
SOUTHEAST OF SEDAN TO PRIAM TO ECHO...MOVING EAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  OLIVIA...LITCHFIELD...RENVILLE...BELGRADE...SVEA...NEW LONDON...
  SPICER...KANDIYOHI...GEORGEVILLE...ELROSA...BLOMKEST...DANUBE...
  HAWICK...LAKE HENRY AND ATWATER.

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 4490 9558 4520 9548 4539 9553 4554 9559
      4566 9453 4518 9444 4498 9447 4498 9450
      4472 9450 4471 9560
TIME...MOT...LOC 0221Z 251DEG 45KT 4553 9508 4511 9505
          4467 9533
WIND...HAIL 60MPH <.75IN

$$
SPD
422 
WWUS53 KMPX 040233
SVSMPX

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

MNC173-040247-
/O.CAN.KMPX.SV.W.0247.000000T0000Z-120804T0300Z/
YELLOW MEDICINE MN-
933 PM CDT FRI AUG 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL YELLOW MEDICINE
COUNTY IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

LAT...LON 4492 9536 4521 9526 4537 9530 4555 9543
      4566 9453 4518 9444 4498 9447 4498 9450
      4472 9450 4471 9535
TIME...MOT...LOC 0232Z 251DEG 45KT 4557 9489 4515 9486
          4471 9515

$$

MNC023-067-093-121-129-145-151-040300-
/O.CON.KMPX.SV.W.0247.000000T0000Z-120804T0300Z/
CHIPPEWA MN-KANDIYOHI MN-MEEKER MN-POPE MN-RENVILLE MN-STEARNS MN-
SWIFT MN-
933 PM CDT FRI AUG 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
STEARNS...NORTHERN RENVILLE...WESTERN MEEKER AND KANDIYOHI COUNTIES
IN CENTRAL MINNESOTA...AND EASTERN SWIFT...SOUTHEASTERN POPE AND
EASTERN CHIPPEWA COUNTIES IN WEST CENTRAL MINNESOTA UNTIL 1000 PM
CDT...

AT 930 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 ELROSA TO
KANDIYOHI TO 6 MILES WEST OF BECHYN...MOVING EAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  OLIVIA...LITCHFIELD...HAWICK...LAKE HENRY...ATWATER...LAKE
  LILLIAN...PAYNESVILLE...NEW MUNICH...GROVE CITY...THORPE...
  MANANNAH...ROSCOE...BIRD ISLAND...ALBANY AND FARMING.

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 4492 9536 4521 9526 4537 9530 4555 9543
      4566 9453 4518 9444 4498 9447 4498 9450
      4472 9450 4471 9535
TIME...MOT...LOC 0232Z 251DEG 45KT 4557 9489 4515 9486
          4471 9515
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, 8:20 PM CDTSevere Thunderstorm WarningMPXChippewa, Lac qui Parle, Renville, Swift, Yellow Medicine55 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, 9:47 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.