Alert archive / Wisconsin / Freeze Warnings in 2009

Freeze Warning 4, NWS Green Bay, WI

September 29, 20097 counties in Wisconsin

NWS Green Bay, WI issued this freeze warning at Sep 29, 2009, 3:49 AM CDT for 7 counties in Wisconsin. It took effect at Sep 30, 2009, 12:00 AM CDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 29, 2009, 3:49 AM CDT (08:49 UTC)
In effect from
Sep 30, 2009, 12:00 AM CDT
Expired
Sep 30, 2009, 8:00 AM CDT
In force
8 hr
Issued by
NWS Green Bay, WI

Counties Florence County, WI, Forest County, WI, Langlade County, WI, Lincoln County, WI, Marinette County, WI, Oneida County, WI, Vilas County, WI

The radar

The Green Bay radar (KGRB), 141 km from the middle of the area, began a volume at 08:50 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 00:00Z, 8.8 hours before the alert went out and 144 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 00:00Z on 2009-09-29Temperature 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 00:00Z on 2009-09-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 206 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
1003 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
206 m²/s²
0-3 km storm-relative helicity
206 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 freeze warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Green Bay, WI wrote its last area forecast discussion before this freeze warning went out at Sep 29, 3:47 AM CDT, 2 minutes earlier.

Area forecast discussion, Sep 29, 3:47 AM CDT, 2 minutes before
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Hazardous weather outlook, Sep 28, 3:33 PM CDT, 12 hours 16 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREEN BAY WI
333 PM CDT MON SEP 28 2009

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-291200-
VILAS-ONEIDA-FOREST-FLORENCE-NORTHERN MARINETTE-LINCOLN-LANGLADE-
MENOMINEE-NORTHERN OCONTO-DOOR-MARATHON-SHAWANO-WOOD-PORTAGE-
WAUPACA-OUTAGAMIE-BROWN-KEWAUNEE-WAUSHARA-WINNEBAGO-CALUMET-
MANITOWOC-SOUTHERN MARINETTE-SOUTHERN OCONTO-
333 PM CDT MON SEP 28 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
AND NORTHEAST WISCONSIN.

.DAY ONE...TONIGHT

WINDS WILL CONTINUE TO RANGE BETWEEN 20 AND 30 MPH WITH GUSTS UP
TO 45 MPH THROUGH EARLY THIS EVENING ACROSS PORTIONS OF CENTRAL
AND EAST-CENTRAL WISCONSIN. WIND GUSTS OVER 50 MPH ARE POSSIBLE
ACROSS NORTHERN DOOR COUNTY THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH MONDAY

A HARD FREEZE IS POSSIBLE OVER PORTIONS OF NORTH-CENTRAL AND FAR
NORTHEAST WISCONSIN TUESDAY NIGHT. ELSEWHERE...FROST IS EXPECTED OVER
MUCH OF CENTRAL AND NORTHEAST WISCONSIN AWAY FROM THE WATERS OF
GREEN BAY AND LAKE MICHIGAN TUESDAY NIGHT AND AGAIN WEDNESDAY
NIGHT. SEE THE LATEST HEADLINES FOR MORE DETAILS.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE REQUESTED TO REPORT PEAK WIND GUSTS OVER 40 MPH TO
THE NATIONAL WEATHER SERVICE IN GREEN BAY.

LMZ521-522-541>543-291200-
THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK
ISLAND PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN-
333 PM CDT MON SEP 28 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST LAKE
MICHIGAN AND THE WATERS OF GREEN BAY.

.DAY ONE...TONIGHT

GALES FORCE WINDS WILL CONTINUE THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH MONDAY

WINDS WILL DIMINISH ON TUESDAY...BUT MAY STILL BE STRONG ENOUGH
TO CREATE HAZARDOUS BOATING CONDITIONS FOR SMALL CRAFT.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 29, 3:49 AM CDTFrost AdvisoryGRBBrown, Calumet, Marathon, Marinette, Menominee, Oconto and 7 more28 hr
Sep 29, 6:55 AM CDTWind AdvisoryGRBDoor9 hr
Sep 29, 10:22 AM CDTGale WarningGRB6 hr
Sep 29, 10:22 AM CDTSmall Craft AdvisoryGRB24 hr

Nearby

Freeze Warnings in Wisconsin, 2009Every freeze warning 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.