Alert archive / Wisconsin / Tornado Warnings in 2008

Tornado Warning 4, NWS Green Bay, WI

April 25, 2008Calumet County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Apr 25, 2008, 6:48 PM CDT for Calumet County, Wisconsin. It was in force for 9 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: Apr 25, 2008, 6:48 PM CDT (23:48 UTC)
Expired: Apr 25, 2008, 6:57 PM CDT
In force: 9 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon

County Calumet County, WI

The radar

The Green Bay radar (KGRB), 58 km from the middle of the area, began a volume at 23:50 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 12:00Z, 11.8 hours before the alert went out and 56 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 806 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 240 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.

000 
WFUS53 KGRB 252348
TORGRB
WIC015-260015-
/O.NEW.KGRB.TO.W.0004.080425T2348Z-080426T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
648 PM CDT FRI APR 25 2008

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* TORNADO WARNING FOR...
  CALUMET COUNTY IN EAST CENTRAL WISCONSIN...

* UNTIL 715 PM CDT

* AT 645 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO 8 MILES WEST OF CHILTON...OR 11
  MILES EAST OF OSHKOSH...MOVING NORTHEAST AT 46 MPH.

* THE TORNADO WILL BE NEAR...
  CHILTON BY 655 PM...

SPOTTERS WERE WATCHING A ROTATING WALL CLOUD OVER LAKE WINNEBAGO 
WEST OF STOCKBRIDGE AT 645 PM. A TORNADO COULD FORM WITH LITTLE 
NOTICE. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE 
INDOORS AND GO TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM 
WINDOWS.

LAT...LON 4397 8841 4398 8840 4411 8840 4419 8832
      4401 8807 4392 8827 4393 8828 4393 8834
TIME...MOT...LOC 2348Z 236DEG 40KT 4403 8829

$$

RDM

1 follow-up statement

000 
WWUS53 KGRB 252357
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
658 PM CDT FRI APR 25 2008

WIC015-260008-
/O.CAN.KGRB.TO.W.0004.000000T0000Z-080426T0015Z/
CALUMET-
658 PM CDT FRI APR 25 2008

...THE TORNADO WARNING FOR CALUMET COUNTY IS CANCELLED...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED.

GUSTY WINDS AND SMALL HAIL ARE STILL POSSIBLE WITH THESE
THUNDERSTORMS.

LAT...LON 4397 8841 4398 8840 4411 8840 4419 8832
      4401 8807 4392 8827 4393 8828 4393 8834
TIME...MOT...LOC 2358Z 236DEG 40KT 4409 8816

$$

RDM

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 4:34 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Wood	56 min
Apr 25, 5:07 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Wood	38 min
Apr 25, 5:45 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Wood	45 min
Apr 25, 5:55 PM CDT	Severe Thunderstorm Warning	GRB	Calumet, Outagamie, Winnebago	25 min
Apr 25, 6:09 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Outagamie, Shawano	23 min
Apr 25, 6:21 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln	39 min
Apr 25, 6:22 PM CDT	Tornado Warning	GRB	Calumet, Winnebago	23 min
Apr 25, 6:26 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Door, Kewaunee, Oconto, Shawano	49 min
Apr 25, 6:59 PM CDT	Severe Thunderstorm Warning	GRB	Oneida	46 min

Nearby

Tornado Warnings in Wisconsin, 2008 Every tornado warning in 2008 Tornadoes in 2008

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.