Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 244, NWS Twin Cities, MN

August 23, 20118 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 23, 2011, 3:38 AM CDT for 8 counties in Minnesota. It was in force for 56 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
Aug 23, 2011, 3:38 AM CDT (08:38 UTC)
Expired
Aug 23, 2011, 4:34 AM CDT
In force
56 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Chippewa County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Meeker County, MN, Pope County, MN, Stearns County, MN, Swift County, MN, Yellow Medicine County, MN

The radar

The Minneapolis radar (KMPX), 135 km from the middle of the area, began a volume at 08:40 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 23, 3:34 AM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 8.6 hours before the alert went out and 133 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 2011-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 114 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 2011-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 square meters per square second.193958Sfc1 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
114 J/kg
Mixed-layer CIN
-258 J/kg
Mixed-layer LCL
1559 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
155 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.

558 
WUUS53 KMPX 230838
SVRMPX
MNC023-067-073-093-121-145-151-173-230945-
/O.NEW.KMPX.SV.W.0244.110823T0838Z-110823T0945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
338 AM CDT TUE AUG 23 2011

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...
  EAST CENTRAL LAC QUI PARLE COUNTY IN WEST CENTRAL MINNESOTA...
  NORTHWESTERN MEEKER COUNTY IN CENTRAL MINNESOTA...
  SOUTHEASTERN POPE COUNTY IN WEST CENTRAL MINNESOTA...
  STEARNS COUNTY IN CENTRAL MINNESOTA...
  EASTERN SWIFT COUNTY IN WEST CENTRAL MINNESOTA...
  EXTREME NORTH CENTRAL YELLOW MEDICINE COUNTY IN WEST CENTRAL
  MINNESOTA...

* UNTIL 445 AM CDT

* AT 335 AM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 6
  MILES WEST OF SAUK CENTRE TO DE GRAFF TO 7 MILES NORTH OF
  PROVIDENCE...AND MOVING EAST AT 30 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MONTEVIDEO...
  WILLMAR...
  DE GRAFF...
  SEDAN...
  SAUK CENTRE...
  SUNBURG...
  WATSON...
  ELROSA...
  KERKHOVEN...
  MEIRE GROVE...
  BELGRADE...
  MELROSE...
  GEORGEVILLE...
  ST ROSA...

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 4577 9429 4527 9462 4490 9527 4490 9549
      4485 9573 4487 9631 4528 9553 4577 9511
TIME...MOT...LOC 0838Z 270DEG 25KT 4571 9504 4528 9538
          4492 9605
WIND...HAIL 60MPH 1.00IN

$$

BAP
1 follow-up statement
823 
WWUS53 KMPX 230934
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
434 AM CDT TUE AUG 23 2011

MNC023-067-073-093-121-145-151-173-230948-
/O.CAN.KMPX.SV.W.0244.000000T0000Z-110823T0945Z/
LAC QUI PARLE MN-CHIPPEWA MN-KANDIYOHI MN-MEEKER MN-POPE MN-
STEARNS MN-SWIFT MN-YELLOW MEDICINE MN-
434 AM CDT TUE AUG 23 2011

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN STEARNS... 
NORTHWESTERN MEEKER AND NORTHWEST KANDIYOHI COUNTIES IN CENTRAL 
MINNESOTA...AND EXTREME NORTH CENTRAL YELLOW MEDICINE...EASTERN 
SWIFT...SOUTHEASTERN POPE...CHIPPEWA AND EAST CENTRAL LAC QUI PARLE 
COUNTIES IN WEST CENTRAL MINNESOTA IS CANCELLED...

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

LAT...LON 4577 9429 4527 9462 4490 9527 4490 9549
      4485 9573 4487 9631 4528 9553 4577 9511
TIME...MOT...LOC 0933Z 270DEG 25KT 4572 9396 4506 9439
          4450 9507

$$

BAP

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 23, 12:08 AM CDTSpecial Weather StatementMPXMartin, Watonwan52 min
Aug 23, 12:44 AM CDTSpecial Weather StatementMPXRedwood46 min
Aug 23, 1:24 AM CDTSpecial Weather StatementMPXRenville51 min
Aug 23, 2:01 AM CDTSpecial Weather StatementMPXNicollet44 min
Aug 23, 2:04 AM CDTSevere Thunderstorm WarningMPXBlue Earth, Brown, Nicollet26 min
Aug 23, 2:13 AM CDTSpecial Weather StatementMPXDouglas, Stevens62 min
Aug 23, 2:24 AM CDTSevere Thunderstorm WarningMPXDouglas, Pope, Stevens, Todd66 min
Aug 23, 2:30 AM CDTSevere Thunderstorm WarningMPXLe Sueur, Nicollet, Rice, Sibley45 min
Aug 23, 2:51 AM CDTSpecial Weather StatementMPXFreeborn39 min
Aug 23, 2:55 AM CDTSevere Thunderstorm WarningMPXDouglas, Pope, Stearns, Stevens, Swift, Todd65 min
Aug 23, 2:57 AM CDTSpecial Weather StatementMPXCarver48 min
Aug 23, 3:08 AM CDTSevere Thunderstorm WarningMPXChippewa, Lac qui Parle, Swift67 min
Aug 23, 3:12 AM CDTSevere Thunderstorm WarningMPXScott33 min
Aug 23, 3:40 AM CDTSpecial Weather StatementMPXDakota50 min
Aug 23, 4:04 AM CDTSevere Thunderstorm WarningMPXKandiyohi, McLeod, Meeker, Renville, Stearns, Yellow Medicine56 min
Aug 23, 4:28 AM CDTSpecial Weather StatementMPXBenton, Isanti, McLeod, Renville, Sherburne, Wright47 min
Aug 23, 5:12 AM CDTSevere Thunderstorm WarningMPXAnoka, Carver, Hennepin, Wright46 min
Aug 23, 5:30 AM CDTSevere Thunderstorm WarningMPXAnoka, Dakota, Ramsey46 min
Aug 23, 5:52 AM CDTSpecial Weather StatementMPXWashington38 min
Aug 23, 6:12 AM CDTSevere Thunderstorm WarningMPXFaribault33 min
Aug 23, 6:42 AM CDTSpecial Weather StatementMPXFreeborn33 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011Every 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.