Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 13, NWS La Crosse, WI

September 9, 1991Crawford County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Sep 9, 1991, 6:35 PM CDT for Crawford County, Wisconsin. It was in force for 55 min.

The area

The counties it named.

The facts

Issued: Sep 9, 1991, 6:35 PM CDT (23:35 UTC)
Expired: Sep 9, 1991, 7:30 PM CDT
In force: 55 min
Issued by: NWS La Crosse, WI
Area: Whole counties

County Crawford County, WI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.6 hours before the alert went out and 266 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: 649 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 824 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 219 m²/s²
0-3 km storm-relative helicity: 222 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLSE 092335
SVRLSE
WIC023-100030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
635 PM CDT MON SEP 9 1991
 
THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  730 PM CDT
    FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHWEST WISCONSIN
 
   ...CRAWFORD COUNTY
 
AT 630 PM...RADAR INDICATED A SEVERE THUNDERSTORM IN EXTREME NORTHEAST
IOWA NEAR HARPERS FERRY...OR 40 MILES SOUTH OF LA CROSSE. THE STORM
WAS MOVING EAST AT 20 MILES AN HOUR AND WILL BE AFFECTING LYNXVILLE...
MOUNT STERLING...GAYS MILLS...STEUBEN...AND MOUNT ZION BETWEEN 630
AND 730 PM.
 
AT 610 THIS STORM PRODUCED GOLF BALL SIZED HAIL AT POSTVILLE.
 
THESE STORMS CAN AND SOMETIMES DO PRODUCE TORNADOES WITH LITTLE
OR NO ADVANCE WARNING...SO BE ON THE LOOKOUT.
 
 
 
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAILL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
 
INGRAM
NNNN

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 9, 3:37 PM CDT, 2 hours 58 minutes before

WIZ010-014-092130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
337 PM CDT MON SEP 9 1991

AT 335 PM...RADAR INDICATED A LINE OF THUNDERSTORMS EXTENDING FROM LA
CROSSE THROUGH EXTREME SOUTHEAST MINNESOTA...INTO EXTREME NORTHEAST
IOWA.  ANOTHER THUNDERSTORM WAS LOCATED NEAR BLACK RIVER FALLS
...OR 40 MILES NORTHEAST OF LA CROSSE.

ALL THUNDERSTORMS WERE MOVING NORTHEAST AT 40 MILES AN HOUR AND
WILL PRODUCE SOME BRIEF HEAVY RAIN.^..GUSTY WINDS...AND DANGEROUS
LIGHTNING.

IF A THUNDERSTORM APPROACHES YOUR AREA...MOVE INDOORS.  GET OFF
AREA LAKES AND RIVERS AND HEAD FOR SHELTER.  REMEMBER...LIGHTNING
IS A STORMS WORST KILLER.

INGRAM

Special weather statement, Sep 9, 3:40 PM CDT, 2 hours 55 minutes before

WIZ010-014-092130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
340 PM CDT MON SEP 9 1991

AT 335 PM...RADAR INDICATED A LINE OF THUNDERSTORMS EXTENDING FROM LA
CROSSE THROUGH EXTREME SOUTHEAST MINNESOTA...INTO EXTREME NORTHEAST
IOWA.  ANOTHER THUNDERSTORM WAS LOCATED NEAR BLACK RIVER FALLS
...OR 40 MILES NORTHEAST OF LA CROSSE.

PEA SIZED HAIL WAS REPORTED AT CALEDONIA MINNESOTA AT 335 PM.

ALL THUNDERSTORMS WERE MOVING NORTHEAST AT 40 MILES AN HOUR AND
WILL PRODUCE SOME BRIEF HEAVY RAIN...GUSTY WINDS...AND DANGEROUS
LIGHTNING...AND SMALL HAIL.

IF A THUNDERSTORM APPROACHES YOUR AREA...MOVE INDOORS.  GET OFF
AREA LAKES AND RIVERS AND HEAD FOR SHELTER.  REMEMBER...LIGHTNING
IS A STORMS WORST KILLER.

INGRAM

Special weather statement, Sep 9, 4:18 PM CDT, 2 hours 17 minutes before

WIZ010-014-092220-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
417 PM CDT MON SEP 9 1991

AT 415 PM...RADAR INDICATED TWO BANDS OF SHOWERS AND THUNDERSTORMS
IN WEST CENTRAL WISCONSIN.  THE NORTHERN BAND EXTENDED FROM
WHITEHALL...40 MILES NORTH OF LA CROSSE...THEN TO THE NORTHEAST INTO
CENTRAL WISCONSIN.

THE SECOND BAND EXTENDED FROM NEAR MARSHFIELD TO LA CROSSE THEN
INTO EXTREME SOUTHEAST MINNESOTA AND NORTHEAST IOWA.

THE THUNDERSTORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR AND
WILL PRODUCE SOME VERY HEAVY RAIN...GUSTY WINDS...DANGEROUS
LIGHTNING...AND SMALL HAIL.

IF A THUNDERSTORM APPROACHES YOUR AREA...MOVE INDOORS.  GET OFF
AREA LAKES AND RIVERS AND HEAD FOR SHELTER. STAY INDOORS UNTIL THE
STORM PASSES.  REMEMBER...LIGHTNING IS A STORMS WORST KILLER.

INGRAM

Special weather statement, Sep 9, 4:26 PM CDT, 2 hours 9 minutes before

MNZ019-092215-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ROCHESTER MN
415 PM CDT MON SEP 9 1991

...A LINE OF STRONG THUNDERSTORMS CONTINUE ACROSS SOUTHEAST MINNESOTA
INTO WEST CENTRAL WISCONSIN...

AT 405 PM RADAR INDICATED A LINE OF THUNDERSTORMS SOME WITH INTENSE
RAIN AND SMALL HAIL FROM 30 MILES SOUTHWEST OF LA CROSSE TO 50 MILES
NORTHEAST OF LA CROSSE. OTHER THUNDERSTORMS WERE IN CENTRAL IOWA NEAR
WATERLOO AND IN WESTERN WISONSIN NEAR ARCADIA. A NEW THUNDERSTORM HAD
ALSO DEVELOPED 30 MILES NORTHWEST OF ROCHESTER NEAR KENYON.

THESE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MPH.

NO SEVERE WEATHER HAS BEEN REPORTED WITH THESE STORMS.

DANGEROUS LIGHTNING...POSSIBLE HAIL...AvND VERY HEAVY RAIN CAN BE
EXPECTED.

PERSONS IN FILMORE COUNTY OF EXTREME SOUTHEAST MINNESOTA AND
VERNON...LA CROSSE...AND MONROE COUNTIES OF WEST CENTRAL WISCONSIN
SHOULD REMAIN ALERT AS THESE THUNDERSTORMS APPROACH YOUR AREA.

KRUSE

Special weather statement, Sep 9, 5:36 PM CDT, 59 minutes before

WIZ010-014-092335-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
535 PM CDT MON SEP 9 1991

AT 530 PM...RADAR INDICATED SHOWERS AND THUNDERSTORMS IN WEST CENTRAL
WISCONSIN...EXTREME NORTHEAST IOWA INTO CENTRAL IOWA. IN THE
LA CROSSE TRI STATE AREA...THE STORMS WERE LOCATED IN JACKSON COUNTY
NEAR BLACK RIVER FALLS...WHICH IS 40 MILES NORTHEAST OF LA CROSSE.
A NEWLY DEVELOPED STORM WAS LOCATED JUST NORTH OF THE CITY OF
LA CROSSE.

IN EXTREME NORTHEAST IOWA THE STORMS WERE JUST WEST OF THE
MISSISSIPPI RIVER NEAR LANSING IOWA...30 MILES SOUTH OF LA CROSSE...
AND WILL BE MOVING INTO ADJACENT AREAS OF VERNON AND CRAWFORD
COUNTIES BETWEEN 530 AND 630 PM.  BRIEF HEAVY RAIN AND DANGEROUS
LIGHTNING IS POSSIBLE WITH THESE STORMS.

ALL OF THE STORMS WERE MOVING EAST AT 25 MILES AN HOUR.

INGRAM

Local storm report, Sep 9, 5:56 PM CDT, 39 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
556 PM CDT MON SEP 9 1991

SEPTEMBER 9...PRELIMINARY REPORT...

415 PM     1 INCH HAIL REPORTED AT QUILLIAN/S GROCERY ON THE
           SOUTH SIDE OF THE CITY OF LA CROSSE.  LA CROSSE COUNTY

430 PM     3/4 INCH HAIL REPORTED AT THE INTERSECTION OF MAIN
           STREET AND LOSEY BOULEVARD...IN THE CITY OF LA CROSSE.
           LA CROSSE COUNTY

435 PM     PEA SIZED HAIL ON GRANDAD BLUFF.  LA CROSSE COUNTY

INGRAM

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 9, 4:26 PM CDT	Severe Thunderstorm Warning	ARX	La Crosse	39 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1991 Every 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.