Alert archive / Minnesota / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 77, NWS Twin Cities, MN

August 8, 20094 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 8, 2009, 4:11 AM CDT for 4 counties in Minnesota. It was in force for 38 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 8, 2009, 4:11 AM CDT (09:11 UTC)
Expired
Aug 8, 2009, 4:49 AM CDT
In force
38 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon

Counties Meeker County, MN, Sherburne County, MN, Stearns County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 77 km from the middle of the area, began a volume at 09:10 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 8, 4:25 AM CDTHAIL 1.251 Wsw Kimball, MNHAIL SHREDDED GARDEN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 9.2 hours before the alert went out and 75 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 2009-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2009-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 183 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
1 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
517 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
183 m²/s²
0-3 km storm-relative helicity
341 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 080911
SVRMPX
MNC093-141-145-171-081015-
/O.NEW.KMPX.SV.W.0077.090808T0911Z-090808T1015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
411 AM CDT SAT AUG 8 2009

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN STEARNS COUNTY IN CENTRAL MINNESOTA...
  WEST CENTRAL SHERBURNE COUNTY IN CENTRAL MINNESOTA...
  NORTHWESTERN WRIGHT COUNTY IN CENTRAL MINNESOTA...
  NORTHEASTERN MEEKER COUNTY IN CENTRAL MINNESOTA...

* UNTIL 515 AM CDT

* AT 410 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED 3 MILES SOUTH
  OF WATKINS...OR ABOUT 12 MILES NORTHEAST OF LITCHFIELD...AND MOVING
  NORTHEAST AT 20 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  WATKINS...
  KIMBALL...
  SOUTH HAVEN...
  FAIRHAVEN...
  ANNANDALE...
  LUXEMBURG...
  ST AUGUSTA...
  CLEARWATER...
  ENFIELD...
  CLEAR LAKE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4554 9407 4532 9384 4515 9446 4532 9455
TIME...MOT...LOC 0911Z 239DEG 19KT 4527 9438

$$
2 follow-up statements
000 
WWUS53 KMPX 080949
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
449 AM CDT SAT AUG 8 2009

MNC093-141-145-171-080955-
/O.CAN.KMPX.SV.W.0077.000000T0000Z-090808T1015Z/
STEARNS MN-SHERBURNE MN-WRIGHT MN-MEEKER MN-
449 AM CDT SAT AUG 8 2009

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MEEKER...
NORTHWESTERN WRIGHT...WEST CENTRAL SHERBURNE AND SOUTHEASTERN STEARNS
COUNTIES IS CANCELLED...

RADAR INDICATED THAT THE SEVERE STORM HAD WEAKENED. THEREFORE...THE 
SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED. STRONG THUNDERSTORMS 
REAMIN IN THE AREA...WITH VERY HEAV RAIN. 

LAT...LON 4554 9407 4532 9384 4515 9446 4532 9455
TIME...MOT...LOC 0945Z 239DEG 19KT 4536 9416

$$
000 
WWUS53 KMPX 080949 CCA
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
449 AM CDT SAT AUG 8 2009

MNC093-141-145-171-080955-
/O.CAN.KMPX.SV.W.0077.000000T0000Z-090808T1015Z/
STEARNS MN-SHERBURNE MN-WRIGHT MN-MEEKER MN-
449 AM CDT SAT AUG 8 2009

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MEEKER...
NORTHWESTERN WRIGHT...WEST CENTRAL SHERBURNE AND SOUTHEASTERN STEARNS
COUNTIES IS CANCELLED...

RADAR INDICATED THAT THE SEVERE STORM HAD WEAKENED. THEREFORE...THE 
SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED. STRONG THUNDERSTORMS 
REAMIN IN THE AREA...WITH VERY HEAVY RAIN. 

LAT...LON 4554 9407 4532 9384 4515 9446 4532 9455
TIME...MOT...LOC 0945Z 239DEG 19KT 4536 9416

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 10:39 PM CDTSpecial Weather StatementMPXSibley51 min
Aug 7, 11:04 PM CDTSpecial Weather StatementMPXRenville26 min
Aug 8, 12:24 AM CDTAreal Flood AdvisoryMPXAnoka, Carver, Dakota, Hennepin, McLeod, Ramsey and 3 more3 hr
Aug 8, 12:28 AM CDTAreal Flood AdvisoryMPXAnoka, Carver, Dakota, Hennepin, McLeod, Ramsey and 3 more3 hr
Aug 8, 1:01 AM CDTFlash Flood WarningMPXCarver, Dakota, Hennepin, Ramsey, Washington4 hr
Aug 8, 1:48 AM CDTFlash Flood WarningMPXCarver, Dakota, Scott, Washington4 hr
Aug 8, 4:06 AM CDTFlash Flood WatchMPXAnoka, Carver, Chippewa, Dakota, Goodhue, Hennepin and 14 more19 hr
Aug 8, 4:19 AM CDTHeat AdvisoryMPXBlue Earth, Brown, Carver, Dakota, Faribault, Freeborn and 14 more14 hr
Aug 8, 5:02 AM CDTAreal Flood AdvisoryMPXBenton, Mille Lacs, Sherburne, Stearns, Wright3 hr
Aug 8, 5:29 AM CDTSpecial Weather StatementMPXBenton61 min
Aug 8, 8:06 AM CDTSevere Thunderstorm WarningMPXRenville39 min
Aug 8, 9:32 AM CDTSpecial Weather StatementMPXHennepin, Ramsey43 min
Aug 8, 9:43 AM CDTFlash Flood WarningMPXAnoka, Hennepin, Wright3 hr
Aug 8, 3:46 PM CDTSevere Thunderstorm WarningMPXBrown, Redwood28 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2009Every severe thunderstorm warning in 2009

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.