Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 13, NWS Green Bay, WI

May 12, 2004Marathon County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at May 12, 2004, 4:45 PM CDT for Marathon County, Wisconsin. It was in force for 45 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: May 12, 2004, 4:45 PM CDT (21:45 UTC)
Expired: May 12, 2004, 5:30 PM CDT
In force: 45 min
Issued by: NWS Green Bay, WI
Area: Counties, with a storm outline in the text

County Marathon County, WI

The watch it was issued in

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

Issued	Product	Office	Lasted
May 12, 12:20 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.8 hours before the alert went out and 152 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: 127 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 1117 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

247 
WUUS53 KGRB 122145
SVRGRB
WIC073-122230-


BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
444 PM CDT WED MAY 12 2004

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

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

* UNTIL 530 PM CDT

* AT 444 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  SEVERE THUNDERSTORM WITH STRONG WINDS AND HAIL. THE STORM WAS
  LOCATED NEAR EDGAR. THAT PLACES IT 17 MILES WEST OF WAUSAU. IT 
  WAS MOVING NORTHEAST AT 35 MPH. OTHER STORMS WERE SCATTERED
  ACROSS WESTERN MARATHON COUNTY.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MARATHON CITY AROUND 450 PM...
  LITTLE CHICAGO AROUND 455 PM...
  HAMBURG AROUND 455 PM...
  BROKAW AROUND 505 PM...

IF YOU ARE IN THE WARNED AREA...PREPARE FOR WINDS IN EXCESS OF 60
MPH...HAIL...AND DEADLY LIGHTNING. SEEK SHELTER IMMEDIATELY.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.

LAT...LON 4469 9029 4469 8960 4512 8950 4512 9006

$$

JKL

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 3:59 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln	46 min
May 12, 4:30 PM CDT	Severe Thunderstorm Warning	GRB	Wood	30 min
May 12, 5:15 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Wood	45 min
May 12, 5:28 PM CDT	Severe Thunderstorm Warning	GRB	Langlade	47 min
May 12, 6:42 PM CDT	Special Marine Warning	GRB		2 hr
May 12, 6:42 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.