Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 79, NWS Green Bay, WI

October 29, 2004Lincoln County, Marathon County, Wood County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Oct 29, 2004, 9:30 PM CDT for Lincoln County, Marathon County, Wood County, Wisconsin. It was in force for 60 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: Oct 29, 2004, 9:30 PM CDT (02:30 UTC)
Expired: Oct 29, 2004, 10:30 PM CDT
In force: 60 min
Issued by: NWS Green Bay, WI
Area: Counties, with a storm outline in the text

Counties Lincoln County, WI, Marathon County, WI, Wood County, WI

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Oct 29, 6:30 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.5 hours before the alert went out and 184 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: 1106 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 634 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 150 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 4.3

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KGRB 300230
SVRGRB
WIC069-073-141-300330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
927 PM CDT FRI OCT 29 2004

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MARATHON COUNTY IN WISCONSIN
  WOOD COUNTY IN WISCONSIN
  LINCOLN COUNTY IN WISCONSIN

* UNTIL 1030 PM CDT

* AT 927 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  LINE OF SEVERE THUNDERSTORMS WITH 60 MPH WINDS. THE LINE WAS
  LOCATED FROM 36 MILES NORTHWEST OF MARSHFIELD TO 52 MILES SOUTHWEST
  OF MARSHFIELD. THE LINE WAS MOVING NORTHEAST AT 55 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  COLBY BY 945 PM...
  MARSHFIELD BY 1005 PM...
  STRATFORD BY 1010 PM...
  MERRILL BY 1025 PM...
  
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO WARNING.
IF A TORNADO IS SPOTTED...MOVE TO A BASEMENT OR SMALL INTERIOR ROOM
ON THE LOWEST FLOOR OF YOUR BUILDING.

LAT...LON 4504 9080 4466 9082 4399 9104 4441 9006
      4522 8954 4551 8958

$$

HELMAN

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Oct 29, 9:05 PM CDT, 25 minutes earlier.

Area forecast discussion, Oct 29, 9:05 PM CDT, 25 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREEN BAY WI
905 PM CDT FRI OCT 29 2004

.SHORT TERM...CURRENT ZONES REFLECT CONVECTIVE TRENDS WELL.
DID SOME MINOR ADJUSTMENTS TO TIMING TO FRESHEN UP ZONES.

THE OTHER CONCERN WAS ALONG THE LAKESHORE. DENSE FOG WAS
REPORTED ACROSS KEWAUNEE AND MANITOWOC COUNTIES INTO SOUTHERN
DOOR COUNTY AS WE SPEAK. THE KEWAUNEE AND MANITOWOC COUNTY
SHERIFF DEPARTMENT REPORTED VISIBILITIES DOWN TO A QUARTER OF A
MILE OR LESS.

UPDATED ZONES OUT. WILL TRY TO ADJUST GRIDS TO MATCH FOG AND
CONVECTIVE TRENDS. UPDATED GRIDS SHOULD BE OUT BY 10 PM.
&&

.GRB WATCHES/WARNINGS/ADVISORIES...

DENSE FOG ADVISORY FOR WIZ022-040-050.

&&

ECKBERG
WWW.CRH.NOAA.GOV/GRB

Hazardous weather outlook, Oct 29, 12:00 PM CDT, 9 hours 30 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREEN BAY WI
1200 PM CDT FRI OCT 29 2004

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-301700-
VILAS-ONEIDA-FOREST-FLORENCE-NORTHERN MARINETTE-SOUTHERN MARINETTE-
LINCOLN-LANGLADE-MENOMINEE-NORTHERN OCONTO-SOUTHERN OCONTO-DOOR-
MARATHON-SHAWANO-WOOD-PORTAGE-WAUPACA-OUTAGAMIE-BROWN-KEWAUNEE-WAUSHARA-
WINNEBAGO-CALUMET-MANITOWOC-
1200 PM CDT FRI OCT 29 2004

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

...SEVERE STORMS POSSIBLE LATE THIS AFTERNOON AND TONIGHT...

A STRONG STORM SYSTEM WILL MOVE FROM THE CENTRAL PLAINS TODAY INTO
NORTHWEST WISCONSIN LATE TONIGHT. WIDESPREAD LOW CLOUDS AND FOG HAVE
FORMED OVER NORTHEAST WISCONSIN THIS MORNING IN THE WARM AND VERY MOIST
AIR AHEAD OF THE STORM.  THE CLOUDS WILL SLOWLY CLEAR FROM SOUTH TO
NORTH OVER THE AREA THIS AFTERNOON. INCREASING INSTABILITY DUE TO SOLAR
INSOLATION WILL INCREASE THE POTENTIAL FOR THE DEVELOPMENT OF SCATTERED
STRONG THUNDERSTORMS LATE THIS AFTERNOON...ESPECIALLY OVER CENTRAL
WISCONSIN. A STRONG SQUALL LINE IS ALSO EXPECTED TO DEVELOP AHEAD OF AN
ADVANCING COLD FRONT IN CENTRAL MINNESOTA THIS AFTERNOON. THE SQUALL
LINE IS EXPECTED TO MOVE THROUGH NORTHEAST WISCONSIN BETWEEN 6 PM AND
MIDNIGHT TONIGHT.  THERE IS A MODERATE RISK FOR SEVERE STORMS OVER
CENTRAL WISCONSIN THIS AFTERNOON AND TONIGHT SOUTHWEST OF A LINE FROM
WAUSAU TO OMRO. THERE IS A SLIGHT RISK OF SEVERE STORMS OVER THE
REMAINDER OF NORTHEAST WISCONSIN.

HEAVY RAIN...LARGE HAIL AND DAMAGING WINDS ARE EXPECTED WITH THE
STORMS...THOUGH THERE IS A POTENTIAL FOR ISOLATED TORNADOES...MAINLY
OVER CENTRAL WISCONSIN.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

GUSTY WINDS MAY PRODUCE HAZARDOUS CONDITIONS FOR BOATERS SATURDAY AND
SATURDAY NIGHT. A SMALL CRAFT ADVISORY MAY NEED TO BE ISSUED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY LATE THIS AFTERNOON OR EVENING.

TE
WWW.CRH.NOAA.GOV/GRB

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 29, 10:31 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln, Marathon	59 min
Oct 29, 10:44 PM CDT	Severe Thunderstorm Warning	GRB	Wood	46 min
Oct 29, 11:14 PM CDT	Severe Thunderstorm Warning	GRB	Oneida	46 min
Oct 29, 11:59 PM CDT	Special Marine Warning	GRB		2 hr

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2004 Every severe thunderstorm warning in 2004

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.