Alert archive / Minnesota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 247, NWS Twin Cities, MN

July 31, 20086 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 31, 2008, 6:17 AM CDT for 6 counties in Minnesota. It was in force for 58 min. 11 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
Jul 31, 2008, 6:17 AM CDT (11:17 UTC)
Expired
Jul 31, 2008, 7:15 AM CDT
In force
58 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon

Counties Chippewa County, MN, Kandiyohi County, MN, Meeker County, MN, Redwood County, MN, Renville County, MN, Swift County, MN

The radar

The Minneapolis radar (KMPX), 123 km from the middle of the area, began a volume at 11:18 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
Jul 31, 6:20 AM CDTHAIL 11 N Danube, MN
Jul 31, 6:50 AM CDTTSTM WND DMGOlivia, MNLARGE TREES DOWN BOTH NORTH AND SOUTH SIDE OF TOWN.
Jul 31, 6:54 AM CDTTSTM WND GST 51Wabasso, MN
Jul 31, 7:03 AM CDTTSTM WND DMGRaymond, MNTREES AND POWER LINES DOWN.
Jul 31, 7:11 AM CDTTSTM WND DMGPrinsburg, MNTREES AND POWER LINES DOWN.
Jul 31, 7:13 AM CDTTSTM WND DMG4 E Prinsburg, MNTREES AND POWER LINES DOWN.
Jul 31, 7:16 AM CDTTSTM WND DMG5 Sse Clara City, MNMANY TREES DOWN OR BROAKEN OFF
Jul 31, 7:16 AM CDTTSTM WND DMGBlomkest, MNTREES AND POWER LINES DOWN.
Jul 31, 7:20 AM CDTTSTM WND DMGLake Lillian, MNTREES AND POWER LINES DOWN.
Jul 31, 7:20 AM CDTTSTM WND GST 60Raymond, MN
Jul 31, 7:23 AM CDTTSTM WND GST 751 Sse Renville, MNWEST HIGH SCHOOL.

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
Jul 31, 4:51 AM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 11.3 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2008-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 148 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 2008-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
148 J/kg
Mixed-layer CIN
-303 J/kg
Mixed-layer LCL
1998 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
147 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.

000 
WUUS53 KMPX 311117
SVRMPX
MNC023-067-093-127-129-151-311215-
/O.NEW.KMPX.SV.W.0247.080731T1117Z-080731T1215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
617 AM CDT THU JUL 31 2008

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  KANDIYOHI COUNTY IN CENTRAL MINNESOTA...
  EXTREME EASTERN SWIFT COUNTY IN WEST CENTRAL MINNESOTA...
  EXTREME SOUTHWESTERN MEEKER COUNTY IN CENTRAL MINNESOTA...
  EASTERN CHIPPEWA COUNTY IN WEST CENTRAL MINNESOTA...
  RENVILLE COUNTY IN CENTRAL MINNESOTA...
  REDWOOD COUNTY IN SOUTHWEST MINNESOTA...

* UNTIL 715 AM CDT

* AT 613 AM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING NICKEL SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 65 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
  10 MILES WEST OF SUNBURG TO 22 MILES WEST OF MILROY...AND MOVING   
  EAST AT 36 MPH.  THERE HAVE BEEN REPORTS OF DAMAGING WINDS AROUND  
  MADISON IN LAC QUI PARLE AND APPLETON IN SWIFT COUNTY WITH THESE   
  STORMS.

* SOME LOCATIONS INCLUDE...
  SUNBURG...
  PENNOCK...
  RAYMOND...
  MILROY...
  NEW LONDON...
  PRINSBURG...
  WILLMAR...
  VESTA...
  LUCAN...
  SPICER...
  RENVILLE...
  BELVIEW...

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

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 AM CDT
THURSDAY MORNING FOR SOUTHERN MINNESOTA.

LAT...LON 4539 9482 4450 9467 4453 9489 4430 9509
      4424 9555 4452 9557 4454 9537 4540 9527
TIME...MOT...LOC 1116Z 270DEG 31KT 4533 9541 4454 9594

$$

BAP
1 follow-up statement
000 
WWUS53 KMPX 311136
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
636 AM CDT THU JUL 31 2008

MNC023-067-093-127-129-151-311215-
/O.CON.KMPX.SV.W.0247.000000T0000Z-080731T1215Z/
KANDIYOHI MN-SWIFT MN-MEEKER MN-CHIPPEWA MN-RENVILLE MN-REDWOOD MN-
635 AM CDT THU JUL 31 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 AM CDT
FOR RENVILLE...EXTREME SOUTHWESTERN MEEKER  AND KANDIYOHI COUNTIES IN
CENTRAL MINNESOTA...AND REDWOOD COUNTY IN SOUTHWEST MINNESOTA...AND
EASTERN CHIPPEWA  AND EXTREME EASTERN SWIFT COUNTIES IN WEST CENTRAL
MINNESOTA...

AT 630 AM CDT...RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS...CAPABLE OF PRODUCING NICKEL SIZE HAIL AND DESTRUCTIVE
WINDS IN EXCESS OF 75 MPH.  THESE SEVERE STORMS WERE LOCATED ALONG A
LINE EXTENDING FROM 11 MILES SOUTHWEST OF SUNBURG TO 11 MILES
SOUTHWEST OF RAYMOND TO 11 MILES WEST OF BELVIEW TO 14 MILES
NORTHWEST OF MILROY...AND MOVING EAST AT 36 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE THORPE...SVEA...PRIAM...
HAWICK...BECHYN...WILLMAR...WANDA...WABASSO...VESTA AND SUNBURG.

THIS IS A DANGEROUS SITUATION. PREPARE IMMEDIATELY FOR DESTRUCTIVE
WINDS...WHICH CAN UPROOT TREES...DOWN POWER LINES...AND CAUSE DAMAGE
TO ROOFS AND WINDOWS. EVACUATE MOBILE HOMES AS THEY MAY BE
OVERTURNED. LARGE HAIL IS ALSO EXPECTED...WHICH CAN CAUSE DAMAGE TO
VEHICLES AND WINDOWS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND
STAY AWAY FROM WINDOWS.

THIS STORM HAS A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE ACROSS 
LAC QUE PARLE AND SWIFT COUNTIES. THIS IS AN EXTREMELY DANGEROUS 
SITUATION.

LAT...LON 4539 9482 4450 9467 4453 9489 4430 9509
      4424 9555 4452 9557 4454 9537 4540 9527
TIME...MOT...LOC 1135Z 270DEG 31KT 4523 9532 4493 9536
          4465 9549 4450 9576

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 5:12 AM CDTSevere Thunderstorm WarningMPXChippewa, Lac qui Parle, Swift48 min
Jul 31, 5:20 AM CDTSevere Thunderstorm WarningMPXLac qui Parle, Yellow Medicine55 min
Jul 31, 5:47 AM CDTSevere Thunderstorm WarningMPXChippewa, Kandiyohi, Meeker, Renville43 min
Jul 31, 5:54 AM CDTSevere Thunderstorm WarningMPXChippewa, Lac qui Parle, Renville, Swift, Yellow Medicine66 min
Jul 31, 6:09 AM CDTSevere Thunderstorm WarningMPXLac qui Parle, Yellow Medicine51 min
Jul 31, 6:30 AM CDTSevere Thunderstorm WarningMPXMcLeod, Nicollet, Renville, Sibley60 min
Jul 31, 6:48 AM CDTTornado WarningMPXChippewa, Kandiyohi, Swift42 min
Jul 31, 6:55 AM CDTSevere Thunderstorm WarningMPXChippewa, Swift50 min
Jul 31, 6:56 AM CDTSevere Thunderstorm WarningMPXBrown, Le Sueur, Nicollet, Redwood, Renville, Sibley64 min
Jul 31, 7:06 AM CDTSevere Thunderstorm WarningMPXMcLeod, Meeker, Wright54 min
Jul 31, 7:15 AM CDTSevere Thunderstorm WarningMPXKandiyohi, Redwood, Renville46 min
Jul 31, 7:20 AM CDTHigh Wind WarningMPXLac qui Parle, Yellow Medicine100 min
Jul 31, 7:27 AM CDTSevere Thunderstorm WarningMPXWatonwan63 min
Jul 31, 7:32 AM CDTSevere Thunderstorm WarningMPXCarver, Le Sueur, McLeod, Nicollet, Renville, Scott and 1 more58 min
Jul 31, 7:36 AM CDTTornado WarningMPXKandiyohi, McLeod, Meeker39 min
Jul 31, 7:39 AM CDTSevere Thunderstorm WarningMPXBlue Earth, Le Sueur, Nicollet, Waseca66 min
Jul 31, 7:59 AM CDTSevere Thunderstorm WarningMPXFaribault, Martin61 min
Jul 31, 8:10 AM CDTSevere Thunderstorm WarningMPXDakota, Hennepin, Le Sueur, Rice, Scott, Steele and 1 more50 min
Jul 31, 8:21 AM CDTSevere Thunderstorm WarningMPXFreeborn54 min
Jul 31, 8:34 AM CDTSevere Thunderstorm WarningMPXDakota, Goodhue56 min
Jul 31, 8:47 AM CDTTornado WarningMPXGoodhue, Rice, Steele18 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2008Every severe thunderstorm warning in 2008

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.