Alert archive / Minnesota / Special Weather Statements in 2009

Special Weather Statement, NWS Twin Cities, MN

August 25, 20096 counties in Minnesota

NWS Twin Cities, MN issued this special weather statement at Aug 25, 2009, 3:46 AM CDT for 6 counties in Minnesota. It was in force for 59 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 25, 2009, 3:46 AM CDT (08:46 UTC)
Expired: Aug 25, 2009, 4:45 AM CDT
In force: 59 min
Issued by: NWS Twin Cities, MN

Counties Dakota County, MN, Faribault County, MN, Le Sueur County, MN, Rice County, MN, Steele County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 76 km from the middle of the area, began a volume at 08:46 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 nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 8.8 hours before the alert went out and 396 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2098 J/kg
Mixed-layer CIN: -282 J/kg
Mixed-layer LCL: 1196 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Twin Cities, MN wrote its last area forecast discussion before this special weather statement went out at Aug 25, 3:38 AM CDT, 8 minutes earlier.

Area forecast discussion, Aug 25, 3:38 AM CDT, 8 minutes before

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Hazardous weather outlook, Aug 25, 1:03 AM CDT, 2 hours 43 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
103 AM CDT TUE AUG 25 2009

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
251000-
DOUGLAS-TODD-MORRISON-MILLE LACS-KANABEC-STEVENS-POPE-STEARNS-
BENTON-SHERBURNE-ISANTI-CHISAGO-LAC QUI PARLE-SWIFT-CHIPPEWA-
KANDIYOHI-MEEKER-WRIGHT-HENNEPIN-ANOKA-RAMSEY-WASHINGTON-
YELLOW MEDICINE-RENVILLE-MCLEOD-SIBLEY-CARVER-SCOTT-DAKOTA-
REDWOOD-BROWN-NICOLLET-LE SUEUR-RICE-GOODHUE-WATONWAN-BLUE EARTH-
WASECA-STEELE-MARTIN-FARIBAULT-FREEBORN-POLK-BARRON-RUSK-
ST. CROIX-PIERCE-DUNN-PEPIN-EAU CLAIRE-
103 AM CDT TUE AUG 25 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL AND
SOUTHERN MINNESOTA...AND WEST CENTRAL WISCONSIN.

.DAY ONE...TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED TO EXPAND OVERNIGHT ACROSS
PARTS OF CENTRAL AND SOUTH CENTRAL MINNESOTA...AND WEST CENTRAL
WISCONSIN. THE GREATEST RISK OF STRONG THUNDERSTORMS WOULD BE OVER
SOUTH CENTRAL MINNESOTA AHEAD OF THE APPROACHING COLD FRONT. SMALL
HAIL...GUSTY WINDS AND LOCALIZED HEAVY RAINFALL ARE POSSIBLE WITH
SOME OF THE STRONGER STORMS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SCATTERED THUNDERSTORMS ARE EXPECTED TO BE ONGOING ON TUESDAY
MORNING ACROSS SOUTH CENTRAL MINNESOTA AND PARTS OF WEST CENTRAL
WISCONSIN. A FEW STRONGER STORMS WILL STILL BE POSSIBLE ACROSS
FAR SOUTHERN MINNESOTA...WITH THE POSSIBILITY OF SMALL HAIL...GUSTY
WINDS AND LOCALIZED HEAVY RAINFALL.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION WILL NOT BE NEEDED.

In the hours before

Special weather statement, Aug 25, 2:42 AM CDT, 1 hour 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
242 AM CDT TUE AUG 25 2009

MNZ074-075-082-083-091-092-250845-
BLUE EARTH-BROWN-FARIBAULT-MARTIN-NICOLLET-WATONWAN-
242 AM CDT TUE AUG 25 2009

AT 240 AM CDT...WEATHER SERVICE RADAR WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM ST JAMES TO 14 MILES SOUTH
OF CEYLON. THESE STORMS WERE MOVING NORTHEAST AT 40 MPH.

HAIL UP TO DIME SIZE AND WINDS UP TO 40 MPH ARE EXPECTED WITH THESE
STORMS.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  ST JAMES.
  LA SALLE.
  WILBERT.
  HANSKA.
  NORTHROP.
  GRANADA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE THUNDERSTORMS COULD INTENSIFY QUICKLY...SO BE READY TO ACT IF A
WARNING IS ISSUED.

&&

LAT...LON 4350 9476 4405 9471 4441 9400 4364 9403
      4349 9428
TIME...MOT...LOC 0741Z 231DEG 35KT 4402 9461 4334 9467

Special weather statement, Aug 25, 3:32 AM CDT, 14 minutes before

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Local storm report, Aug 25, 3:37 AM CDT, 9 minutes before

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Special weather statement, Aug 25, 3:46 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 2:42 AM CDT	Special Weather Statement	MPX	Blue Earth, Martin, Watonwan	63 min
Aug 25, 2:58 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Martin, Nicollet, Sibley, Watonwan	47 min
Aug 25, 3:32 AM CDT	Special Weather Statement	MPX	Swift	58 min
Aug 25, 5:44 AM CDT	Areal Flood Advisory	MPX	Dakota, Goodhue	3 hr
Aug 25, 4:41 AM CDT	Special Weather Statement	MPX	Pierce	64 min
Aug 25, 6:19 AM CDT	Special Weather Statement	MPX	Barron	41 min
Aug 25, 7:15 AM CDT	Areal Flood Advisory	MPX	Barron, Polk	4 hr

Nearby

Special Weather Statements in Minnesota, 2009 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.