Alert archive / Minnesota / Winter Weather Advisories in 2008

Winter Weather Advisory 18, NWS Twin Cities, MN

December 20, 200833 counties in Minnesota; 9 counties in Wisconsin

NWS Twin Cities, MN issued this winter weather advisory at Dec 20, 2008, 8:48 PM CST for 33 counties in Minnesota; 9 counties in Wisconsin. It was in force for 21 hr.

The area

The counties it named.

The facts

Issued: Dec 20, 2008, 8:48 PM CST (02:48 UTC)
Expired: Dec 21, 2008, 6:00 PM CST
In force: 21 hr
Issued by: NWS Twin Cities, MN

All 42 counties

Anoka County, MN, Benton County, MN, Carver County, MN, Chippewa County, MN, Chisago County, MN, Dakota County, MN, Douglas County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Le Sueur County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Nicollet County, MN, Pope County, MN, Ramsey County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Washington County, MN, Wright County, MN, Yellow Medicine County, MN, Barron County, WI, Chippewa County, WI, Dunn County, WI, Eau Claire County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Rusk County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 34 km from the middle of the area, began a volume at 02:49 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

Minneapolis, MN (KMPX), launched 00:00Z, 2.8 hours before the alert went out and 33 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 798 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: -45 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter weather advisory 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 winter weather advisory went out at Dec 20, 6:53 PM CST, 1 hour 55 minutes earlier.

Area forecast discussion, Dec 20, 6:53 PM CST, 1 hour 55 minutes before

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Hazardous weather outlook, Dec 20, 12:39 PM CST, 8 hours 9 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1239 PM CST SAT DEC 20 2008

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
211200-
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-
1239 PM CST SAT DEC 20 2008

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

BLIZZARD CONDITIONS ARE EXPECTED TO PERSIST IN WEST AND SOUTH
CENTRAL MINNESOTA INTO TONIGHT AS NORTHWEST WINDS CONTINUE TO
INCREASE. DESPITE SNOW CEASING IN WESTERN MINNESOTA BY LATE
AFTERNOON...THE WINDS WILL LEAD TO BLOWING OF SNOW AND NEAR
WHITEOUT CONDITIONS AT TIMES. WINTER STORM CONDITIONS ARE EXPECTED
OVER THE REMAINDER OF THE OUTLOOK AREA...WITH ACCUMULATING SNOW
INTO EARLY EVENING AND DEVELOPING BLOWING SNOW BY TONIGHT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

AREAS OF LIGHT SNOW AND BLOWING AND DRIFTING SNOW...STRONG
WINDS...AND ASSOCIATED COLD WIND CHILLS WILL CONTINUE MUCH OF
SUNDAY AS THE WEATHER SYSTEM MOVES GRADUALLY EAST OF THE AREA.

YET ANOTHER LOW PRESSURE AREA WITH POTENTIAL ACCUMULATING SNOW
HAS ITS SIGHTS SET ON OUR AREA MONDAY NIGHT AND TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS AND SNOWFALL OBSERVERS ARE URGED TO REPORT SNOWFALL
AMOUNTS TO THE NATIONAL WEATHER SERVICE.

In the hours before

Local storm report, Dec 20, 6:35 PM CST, 2 hours 13 minutes before

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Local storm report, Dec 20, 7:09 PM CST, 1 hour 39 minutes before

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Local storm report, Dec 20, 7:17 PM CST, 1 hour 31 minutes before

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Local storm report, Dec 20, 8:07 PM CST, 41 minutes before

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Local storm report, Dec 20, 8:17 PM CST, 31 minutes before

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Local storm report, Dec 20, 8:42 PM CST, 6 minutes before

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      <p id="message2">
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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
Dec 21, 3:15 PM CST	Wind Chill Warning	MPX	Blue Earth, Brown, Faribault, Freeborn, Martin, Redwood and 3 more	11 hr
Dec 21, 3:15 PM CST	Wind Chill Advisory	MPX	Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 36 more	18 hr

Nearby

Winter Weather Advisories in Minnesota, 2008 Winter Weather Advisories in Wisconsin, 2008 Every winter weather advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.