Alert archive / Minnesota / Special Weather Statements in 2009

Special Weather Statement, NWS Twin Cities, MN

August 2, 20094 counties in Minnesota

NWS Twin Cities, MN issued this special weather statement at Aug 2, 2009, 10:37 PM CDT for 4 counties in Minnesota. It was in force for 68 min. 4 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
Aug 2, 2009, 10:37 PM CDT (03:37 UTC)
Expired
Aug 2, 2009, 11:45 PM CDT
In force
68 min
Issued by
NWS Twin Cities, MN

Counties Dakota County, MN, Hennepin County, MN, Ramsey County, MN, Scott County, MN

The radar

The Minneapolis radar (KMPX), 20 km from the middle of the area, began a volume at 03:39 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 2, 11:13 PM CDTTSTM WND DMG2 Sw Excelsior, MNTREE DOWN JUST EAST OF COUNTY ROAD 19 AND TONKA BAY ROAD.
Aug 2, 11:15 PM CDTTSTM WND DMG3 Ssw Excelsior, MNTREE DOWN AT COUNTY ROAD 19 AND MINNETONKA DRIVE.
Aug 2, 11:15 PM CDTHAIL 0.753 Ssw Excelsior, MN
Aug 2, 11:48 PM CDTHAIL 0.52 Sw Belle Plaine, MN

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, 3.6 hours before the alert went out and 22 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 2009-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1619 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 2009-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 255 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
1619 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
1198 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
255 m²/s²
0-3 km storm-relative helicity
395 m²/s²
Significant tornado parameter
2.1
Supercell composite
10.4

Open this sounding in Storm Lab

The text

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

000 
WWUS83 KMPX 030337
SPSMPX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1037 PM CDT SUN AUG 2 2009

MNZ060-062-063-068>070-030445-
CARVER-DAKOTA-HENNEPIN-RAMSEY-SCOTT-WASHINGTON-
1037 PM CDT SUN AUG 2 2009

...THUNDERSTORMS WILL MOVE INTO 
CARVER...DAKOTA...HENNEPIN...RAMSEY...SCOTT AND WASHINGTON COUNTIES 
BETWEEN 1045 PM CDT AND 1145 PM CDT...

AT 1031 PM CDT...WEATHER SERVICE RADAR WAS TRACKING A SEVERE 
THUNDERSTORM NEAR GLENCOE. THIS STORM WAS MOVING EAST AT 30 MPH.

THIS STORM HAS A HISTORY OF PRODUCING QUARTER SIZE TO GOLF BALL SIZE 
HAIL...AND 40 MPH WINDS.

* LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...  
  NORWOOD.
  YOUNG AMERICA. 
  COLOGNE.
  WACONIA.  
  SHAKOPEE.
  CHASKA.
  CHANHASSEN.
  EDEN PRAIRIE.
  EDINA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR THE AREA.

&&

LAT...LON 4455 9388 4462 9386 4464 9378 4467 9376
      4468 9384 4506 9373 4500 9277 4477 9279
      4477 9280 4474 9279 4455 9281
TIME...MOT...LOC 0332Z 267DEG 43KT 4481 9409

$$

LS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 8:45 PM CDTSevere Thunderstorm WarningMPXRedwood, Yellow Medicine45 min
Aug 2, 9:24 PM CDTSevere Thunderstorm WarningMPXRedwood, Renville, Yellow Medicine51 min
Aug 2, 9:40 PM CDTSevere Thunderstorm WarningMPXRenville49 min
Aug 2, 9:45 PM CDTTornado WarningMPXRedwood29 min
Aug 2, 9:55 PM CDTSevere Thunderstorm WarningMPXBrown, Redwood50 min
Aug 2, 10:06 PM CDTSevere Thunderstorm WarningMPXMcLeod, Sibley54 min
Aug 2, 10:20 PM CDTSevere Thunderstorm WarningMPXWatonwan39 min
Aug 2, 10:39 PM CDTSevere Thunderstorm WarningMPXCarver52 min
Aug 2, 10:43 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Brown47 min
Aug 2, 10:56 PM CDTSevere Thunderstorm WarningMPXMcLeod, Scott, Sibley49 min
Aug 2, 11:10 PM CDTSevere Thunderstorm WarningMPXCarver, Dakota, Hennepin, Scott40 min
Aug 2, 11:18 PM CDTSevere Thunderstorm WarningMPXDakota47 min
Aug 2, 11:29 PM CDTSpecial Weather StatementMPXSteele, Waseca46 min
Aug 2, 11:45 PM CDTSevere Thunderstorm WarningMPXLe Sueur, Rice, Scott20 min
Aug 2, 11:48 PM CDTSevere Thunderstorm WarningMPXGoodhue, Washington57 min
Aug 2, 9:16 PM CDTSevere Thunderstorm WarningMPXRusk44 min
Aug 3, 12:12 AM CDTSpecial Weather StatementMPXPepin48 min
Aug 3, 12:29 AM CDTSpecial Weather StatementMPXSaint Croix46 min
Aug 3, 12:35 AM CDTSpecial Weather StatementMPXChippewa, Dunn, Eau Claire40 min

Nearby

Special Weather Statements in Minnesota, 2009Every special weather statement 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.