Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 43, NWS Green Bay, WI

September 14, 1991Dane County, Green County, Rock County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Sep 14, 1991, 9:03 PM CDT for Dane County, Green County, Rock County, Wisconsin. It was in force for 57 min.

The area

The counties it named.

The facts

Issued
Sep 14, 1991, 9:03 PM CDT (02:03 UTC)
Expired
Sep 14, 1991, 10:00 PM CDT
In force
57 min
Issued by
NWS Green Bay, WI
Area
Whole counties

Counties Dane County, WI, Green County, WI, Rock County, WI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.1 hours before the alert went out and 212 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 1991-09-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 555 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 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 1991-09-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 218 square meters per square second.1939587897117136Sfc1 km3 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
555 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
654 m above ground
0-6 km bulk shear
108 kt
0-1 km storm-relative helicity
218 m²/s²
0-3 km storm-relative helicity
232 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.8

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The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Special weather statement, Sep 14, 6:01 PM CDT, 3 hours 2 minutes before
WIZ008-142345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
600 PM CDT SAT SEP 14 1991

...STRONG THUNDERSTORMS APPROACHING SHAWANO AND WAUPACA COUNTIES...

AT 555 PM WEATHER RADAR SHOWED VERY STRONG THUNDERSTORMS MOVING INTO
WESTERN SHAWANO COUNTY NEAR WITTENBERG AND EXTENDING SOUTHWEST INTO
PORTAGE COUNTY NEAR AMHERST JUNCTION.

THESE STORMS ARE MOVING TO THE EAST AT AROUND 30 MILES AN HOUR AND
WILL MOVE INTO CENTAL SHAWANO COUNTY NEAR THE CITY OF SHAWANO AND
EXTEND TO WESTERN WAUPACA COUNTY NEAR THE CITY OF WAUPACA BY 630 PM.

THESE THUNDERSTORMS HAVE A HISTORY OF PRODUCING WIND GUSTS TO 50 MILES
AN HOUR...HEAVY RAINS...AND DANGEROUS LIGHTNING.  YOU SHOULD BE ALERT
FOR THUNDERSTORMS IN THIS AREA AND LISTEN FOR LATER STATEMENTS.
Special weather statement, Sep 14, 6:39 PM CDT, 2 hours 24 minutes before
WIZ008-150030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
640 PM CDT SAT SEP 14 1991

...VERY STRONG THUNDERSTORMS IN SHAWANO AND WAUPACA COUNTIES...

AT 635 PM WEATHER RADAR SHOWED VERY STRONG THUNDERSTORMS NEAR THE CITY
OF SHAWANO IN CENTRAL SHAWANO COUNTY.  ANOTHER STRONG THUNDERSTORM WAS
LOCATED NEAR MARION IN THE SOUTHERN PART OF THE COUNTY.

THESE STORMS ARE MOVING TO THE EAST AT AROUND 30 MILES AN HOUR AND
WILL MOVE TO CENTRAL OCONTO...NORTHERN BROWN AND OUTAGAMIE COUNTIES BY
730 PM.  THE SHERIFFS DEPARTMENT IN SHAWANO COUNTY REPORTED HEAVY RAINS
AND WIND GUSTS ESTIMATED TO 35 MILES AN HOUR AT TIGERTON AT 625 PM.
THE CITY OF SHAWANO HAS ALSO HAD POWER OUTAGES DUbE TO LIGHTNING STRIKES.

THESE THUNDERSTORMS HAVE A HISTORY OF PRODUCING WIND GUSTS TO 50 MILES
AN HOUR...HEAVY RAINS...AND DANGEROUS LIGHTNING.  YOU SHOULD BE ALERT
FOR THUNDERSTORMS IN THIS AREA AND LISTEN FOR LATER STATEMENTS.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 14, 7:17 PM CDTTornado WarningGRBAdams, Marquette43 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1991Every severe thunderstorm warning in 1991

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.