Alert archive / Minnesota / Winter Weather Advisories in 2010

Winter Weather Advisory 4, NWS Twin Cities, MN

January 21, 201026 counties in Minnesota; 9 counties in Wisconsin

NWS Twin Cities, MN issued this winter weather advisory at Jan 21, 2010, 6:25 PM CST for 26 counties in Minnesota; 9 counties in Wisconsin. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Jan 21, 2010, 6:25 PM CST (00:25 UTC)
Expired
Jan 22, 2010, 12:00 AM CST
In force
6 hr
Issued by
NWS Twin Cities, MN
All 35 counties

Anoka County, MN, Benton County, MN, Carver County, MN, Chisago County, MN, Dakota County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Le Sueur County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Steele County, MN, Todd County, MN, Waseca County, MN, Washington County, MN, Wright 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), 36 km from the middle of the area, began a volume at 00:24 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, 0.4 hours before the alert went out and 38 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 2010-01-22Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2010-01-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
510 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
50 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 Jan 21, 5:20 PM CST, 1 hour 5 minutes earlier.

Area forecast discussion, Jan 21, 5:20 PM CST, 1 hour 5 minutes before
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Hazardous weather outlook, Jan 21, 2:06 PM CST, 4 hours 19 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
206 PM CST THU JAN 21 2010

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
221200-
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-
206 PM CST THU JAN 21 2010

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

AREAS OF FOG WILL LINGER OVER SOUTHWEST MINNESOTA THROUGH TONIGHT.
PERIODS OF LIGHT FREEZING RAIN OR FREEZING DRIZZLE WILL CONTINUE
OVER CENTRAL AND EASTERN MINNESOTA AND WEST CENTRAL WISCONSIN INTO
THIS EVENING. PATCHY FREEZING DRIZZLE WILL OCCUR ACROSS MUCH OF THE
OUTLOOK AREA OVERNIGHT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A LOW PRESSURE SYSTEM IS EXPECTED TO PUSH EAST FROM THE ROCKIES
AND INTO THE NORTHERN PLAINS ON FRIDAY AND THEN GRADUALLY MOVE
OVER THE OUTLOOK AREA DURING THE WEEKEND. THIS SYSTEM WILL LIKELY
BRING A PERIOD OF FREEZING RAIN TO THE REGION FRIDAY NIGHT AND
EARLY SATURDAY.

HOWEVER...PLENTY OF UNCERTAINTY REMAINS WITH THIS SYSTEM
REGARDING PRECIPITATION TYPE FOR THE REMAINDER OF SATURDAY AND
SUNDAY. AT THIS TIME...A CONTINUED THREAT FOR MIXED PRECIPITATION
EXISTS...INCLUDING FREEZING RAIN...SLEET AND SNOW....ESPECIALLY
ACROSS WESTERN AREAS OF MINNESOTA. CONTINUE TO MONITOR THE
FORECAST FOR UPDATES AND FURTHER DETAILS CONCERNING THIS POTENTIAL
STORM SYSTEM.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION WILL NOT BE NEEDED.

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 22, 3:27 AM CSTWinter Storm WatchMPXChippewa, Douglas, Kandiyohi, Lac qui Parle, Meeker, Morrison and 8 more8 hr
Jan 22, 11:50 AM CSTWinter Storm WarningMPXChippewa, Douglas, Lac qui Parle, Pope, Stevens, Swift and 2 more28 hr
Jan 22, 11:50 AM CSTWinter Weather AdvisoryMPXAnoka, Benton, Brown, Carver, Chisago, Hennepin and 17 more28 hr
Jan 22, 2:51 PM CSTFreezing Rain AdvisoryMPXBlue Earth, Dakota, Faribault, Freeborn, Goodhue, Le Sueur and 5 more21 hr

Nearby

Winter Weather Advisories in Minnesota, 2010Winter Weather Advisories in Wisconsin, 2010Every winter weather advisory in 2010

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.