Alert archive / Wisconsin / Tornado Warnings in 1991

Tornado Warning 14, NWS Green Bay, WI

September 14, 1991Adams County, Marquette County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Sep 14, 1991, 7:17 PM CDT for Adams County, Marquette County, Wisconsin. It was in force for 43 min.

The area

The counties it named.

The facts

Issued
Sep 14, 1991, 7:17 PM CDT (00:17 UTC)
Expired
Sep 14, 1991, 8:00 PM CDT
In force
43 min
Issued by
NWS Green Bay, WI
Area
Whole counties

Counties Adams County, WI, Marquette County, WI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.3 hours before the alert went out and 135 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

Open this sounding in Storm Lab

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 tornado 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, 1 hour 16 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, 38 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, 9:03 PM CDTSevere Thunderstorm WarningGRBDane, Green, Rock57 min

Nearby

Tornado Warnings in Wisconsin, 1991Every tornado warning in 1991Tornadoes 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.