Alert archive / Wisconsin / Winter Weather Advisories in 2012

Winter Weather Advisory 1, NWS Milwaukee, WI

January 11, 201220 counties in Wisconsin

NWS Milwaukee, WI issued this winter weather advisory at Jan 11, 2012, 2:51 PM CST for 20 counties in Wisconsin. It took effect at Jan 12, 2012, 3:00 AM CST. It was in force for 24 hr.

The area

The counties it named.

The facts

Issued
Jan 11, 2012, 2:51 PM CST (20:51 UTC)
In effect from
Jan 12, 2012, 3:00 AM CST
Expired
Jan 13, 2012, 3:15 AM CST
In force
24 hr
Issued by
NWS Milwaukee, WI

Counties Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Kenosha County, WI, Lafayette County, WI, Marquette County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Rock County, WI, Sauk County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 31 km from the middle of the area, began a volume at 20:53 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.9 hours before the alert went out and 157 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, Green Bay/Straub, WI at 12:00Z on 2012-01-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Green Bay/Straub, WI at 12:00Z on 2012-01-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1428 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
110 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 Milwaukee, WI wrote its last area forecast discussion before this winter weather advisory went out at Jan 11, 2:25 PM CST, 26 minutes earlier.

Area forecast discussion, Jan 11, 2:25 PM CST, 26 minutes before
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Hazardous weather outlook, Jan 11, 3:33 AM CST, 11 hours 18 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
333 AM CST WED JAN 11 2012

WIZ046-047-051-052-056>060-062>072-120945-
MARQUETTE-GREEN LAKE-FOND DU LAC-SHEBOYGAN-SAUK-COLUMBIA-DODGE-
WASHINGTON-OZAUKEE-IOWA-DANE-JEFFERSON-WAUKESHA-MILWAUKEE-
LAFAYETTE-GREEN-ROCK-WALWORTH-RACINE-KENOSHA-
333 AM CST WED JAN 11 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL
WISCONSIN...SOUTH CENTRAL WISCONSIN AND SOUTHEAST WISCONSIN.

.DAY ONE...TODAY AND TONIGHT

A WINTER STORM WATCH GOES INTO EFFECT AFTER 3 AM TONIGHT...ROUGHLY
WEST OF A LINE STRETCHING FROM BERLIN IN GREEN LAKE COUNTY TO
BRODHEAD IN GREEN COUNTY.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A WINTER STORM WATCH IS IN EFFECT FOR ALL OF SOUTH CENTRAL AND
SOUTHEAST WISCONSIN THROUGH EARLY FRIDAY MORNING AS AN INTENSE LOW
PRESSURE SYSTEM TAKES SHAPE OVER THE CENTRAL GREAT LAKES REGION.

SNOW WILL OVERSPREAD THE ENTIRE AREA BY THURSDAY MORNING AND
CONTINUE INTO FRIDAY. THIS LONG DURATION SNOWFALL SHOULD LEAD TO
SNOW TOTALS RANGING FROM AROUND 6 INCHES OVER SOUTHERN LAFAYETTE
AND GREEN COUNTIES...TO 8 TO 9 INCHES OVER A LARGE PART OF
SOUTHEAST WISCONSIN...INCLUDING THE MILWAUKEE METRO AREA. THE
MADISON METRO AREA COULD SEE UP TO 7 INCHES.

IN ADDITION...BRISK NORTHWEST WINDS OF 15 TO 25 MPH WITH A FEW
HIGHER GUSTS SHOULD RESULT IN SOME BLOWING AND DRIFTING SNOW.
TRAVEL WILL LIKELY BE IMPACTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED...BUT SNOWFALL REPORTS
WILL BE APPRECIATED OVER THE NEXT COUPLE OF DAYS.

LMZ643>646-120945-
SHEBOYGAN TO PORT WASHINGTON WI-
PORT WASHINGTON TO NORTH POINT LIGHT WI-
NORTH POINT LIGHT TO WIND POINT WI-
WIND POINT WI TO WINTHROP HARBOR IL-
333 AM CST WED JAN 11 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE MICHIGAN.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A SMALL CRAFT ADVISORY WILL BE NEEDED FROM THURSDAY AFTERNOON
THROUGH FRIDAY NIGHT AS STRONG LOW PRESSURE DEVELOPS OVER THE
GREAT LAKES REGION. BRISK NORTHWEST WINDS WILL GENERATE LARGE
WAVES...THE HIGHEST WAVES WILL BE TOWARD OPEN WATER. WIND SPEEDS
WILL APPROACH GALE WARNING LEVELS FOR A TIME THURSDAY NIGHT.

DAVIS

WWW.WEATHER.GOV/MKX

The office that day

Everything else NWS Milwaukee, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 11, 3:51 AM CSTWinter Storm WatchMKXColumbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 14 more11 hr
Jan 11, 3:33 PM CSTSmall Craft AdvisoryMKX54 hr

Nearby

Winter Weather Advisories in Wisconsin, 2012Every winter weather advisory in 2012

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.