Alert archive / Wisconsin / Tornado Warnings in 1999

Tornado Warning 1, NWS La Crosse, WI

June 6, 1999Taylor County, Wisconsin

NWS La Crosse, WI issued this tornado warning at Jun 6, 1999, 5:18 PM CDT for Taylor County, Wisconsin. It was in force for 17 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 6, 1999, 5:18 PM CDT (22:18 UTC)
Expired
Jun 6, 1999, 5:35 PM CDT
In force
17 min
Issued by
NWS La Crosse, WI
Area
Whole counties

County Taylor County, WI

The radar

The La Crosse radar (KARX), 164 km from the middle of the area, began a volume at 22:21 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 watch it was issued in

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

IssuedProductOfficeLasted
Jun 6, 4:00 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.3 hours before the alert went out and 206 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 12:00Z on 1999-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1488 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 12:00Z on 1999-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 206 square meters per square second.193958Sfc1 km3 km6 km9 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
1488 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
803 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
206 m²/s²
0-3 km storm-relative helicity
240 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.9

Open this sounding in Storm Lab

The text

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

785 
WFUS1 KLSE 062219 RRA
TORLSE
WIC119-062235-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
518 PM CDT SUN JUN 6 1999

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* TORNADO WARNING FOR...
  TAYLOR COUNTY IN NORTH CENTRAL WISCONSIN

* UNTIL 535 PM CDT

* AT 517 PM CDT...AREA LAW ENFORCEMENT INDICATED A TORNADO NEAR RIB
  LAKE... MOVING NORTHEAST AT 40 MPH.

* THE TORNADO WILL BE NEAR...
  NEAR HIGHWAY 102...AT 518 PM

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR

NELSON/RIECK


&

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.

NWS La Crosse, WI wrote its last area forecast discussion before this tornado warning went out at Jun 6, 2:56 PM CDT, 2 hours 22 minutes earlier.

Area forecast discussion, Jun 6, 2:56 PM CDT, 2 hours 22 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LA CROSSE WI
252 PM CDT SUN JUNE 6 1999

MAIN FOCUS AGAIN THIS AFTERNOON AND EVENING IS SEVERE WEATHER
POTENTIAL.  SVR AND TOR WATCHES IN EFFECT FOR ENTIRE CWA EXCEPT FOR
TAYLOR COUNTY THROUGH THIS EVENING.  GIVEN INCREASING LINEAR SPEED
SHEAR DUE TO H3 JET NOSING INTO CENTRAL IOWA...EXPECT AN ACTIVE
EVENING ON THE RADAR.

THE GOOD NEWS IS THAT ALL MODELS ADVERTISE RIDGING AND GOOD DRYING
AFTER MIDNIGHT AS THE VIGOROUS SHORTWAVE AND UPPER TROF MOVE
NORTHEASTWARD OVERNIGHT AND MONDAY.

MAIN CONCERNS BEYOND TONIGHT FOCUS ON MAX TEMPERATURES NEXT TWO
DAYS.  EVEN WITH HEIGHTS SOMEWHAT DEPRESSED ON MONDAY...850 TEMPS
REMAIN WARM AND GIVEN THE DRYING OCCURRING IN THE LOW LEVELS AND
GOOD MIXING...EXPECT LITTLE COOLING FROM TODAY'S READINGS.  RIDGE
AMPLIFIES ON TUESDAY FOR WARMER CONDITIONS...PROBABLY WELL INTO THE
LOWER TO MIDDLE 90S OVER SOUTHWEST WISCONSIN.

.LSE...NONE.

DEVOIR

In the hours before

Special weather statement, Jun 6, 12:10 PM CDT, 5 hours 8 minutes before
IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-070000-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LA CROSSE WI
1210 PM CDT SUN JUN 6 1999

...MODERATE RISK FOR SEVERE THUNDERSTORMS ACROSS SOUTHEAST
MINNESOTA...NORTHEAST IOWA...AND WESTERN AND CENTRAL WISCONSIN THIS
AFTERNOON AND EVENING...

A VERY MOIST AND UNSTABLE AIR MASS WAS LOCATED OVER THE UPPER
MISSISSIPPI VALLEY THIS AFTERNOON...WITH SOME CONVECTION ALREADY
DEVELOPING. A LINE OF SURFACE CONVERGENCE OVER WESTERN MN WILL MOVE
EAST AS THE AFTERNOON WEARS ON...PROVIDING MORE OF A FOCUS FOR
THUNDERSTORM DEVELOPMENT. WITH THE ATMOSPHERE SO UNSTABLE AND LINGERING
BOUNDARIES FROM EARLY MORNING SHOWERS AND STORMS...STORMS COULD STILL
DEVELOP ALMOST ANYWHERE ACROSS THE AREA. FOR TONIGHT...A DISTURBANCE
ALOFT WILL COUPLE WITH A COLD FRONT PUSHING IN FROM THE
PLAINS...PROVIDING ANOTHER FOCUS FOR POSSIBLE SEVERE THUNDERSTORMS.

THE MAIN SEVERE THREAT WILL BE DAMAGING WINDS AND LARGE HAIL. TRAINING
THUNDERSTORMS WILL ALSO BE POSSIBLE...WHICH COULD CAUSE FLOODING
PROBLEMS TO MANY ALREADY SATURATED LOCATIONS.

SPOTTER GROUPS SHOULD REMAIN ALERT FOR POSSIBLE ACTIVATION THIS
AFTERNOON AND EVENING.

RIECK
Special weather statement, Jun 6, 12:10 PM CDT, 5 hours 8 minutes before
IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-070000-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LA CROSSE WI
1210 PM CDT SUN JUN 6 1999

...MODERATE RISK FOR SEVERE THUNDERSTORMS ACROSS SOUTHEAST
MINNESOTA...NORTHEAST IOWA...AND WESTERN AND CENTRAL WISCONSIN THIS
AFTERNOON AND EVENING...

A VERY MOIST AND UNSTABLE AIR MASS WAS LOCATED OVER THE UPPER
MISSISSIPPI VALLEY THIS AFTERNOON...WITH SOME CONVECTION ALREADY
DEVELOPING. A LINE OF SURFACE CONVERGENCE OVER WESTERN MN WILL MOVE
EAST AS THE AFTERNOON WEARS ON...PROVIDING MORE OF A FOCUS FOR
THUNDERSTORM DEVELOPMENT. WITH THE ATMOSPHERE SO UNSTABLE AND LINGERING
BOUNDARIES FROM EARLY MORNING SHOWERS AND STORMS...STORMS COULD STILL
DEVELOP ALMOST ANYWHERE ACROSS THE AREA. FOR TONIGHT...A DISTURBANCE
ALOFT WILL COUPLE WITH A COLD FRONT PUSHING IN FROM THE
PLAINS...PROVIDING ANOTHER FOCUS FOR POSSIBLE SEVERE THUNDERSTORMS.

THE MAIN SEVERE THREAT WILL BE DAMAGING WINDS AND LARGE HAIL. TRAINING
THUNDERSTORMS WILL ALSO BE POSSIBLE...WHICH COULD CAUSE FLOODING
PROBLEMS TO MANY ALREADY SATURATED LOCATIONS.

SPOTTER GROUPS SHOULD REMAIN ALERT FOR POSSIBLE ACTIVATION THIS
AFTERNOON AND EVENING.

RIECK

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 5, 7:26 PM CDTSevere Thunderstorm WarningARXTaylor34 min
Jun 5, 9:52 PM CDTSevere Thunderstorm WarningARXBuffalo68 min
Jun 5, 10:31 PM CDTSevere Thunderstorm WarningARXTrempealeau59 min
Jun 6, 3:02 PM CDTSevere Thunderstorm WarningARXMonroe63 min
Jun 6, 3:29 PM CDTSevere Thunderstorm WarningARXJuneau56 min
Jun 6, 5:38 PM CDTSevere Thunderstorm WarningARXBuffalo, Trempealeau32 min

Nearby

Tornado Warnings in Wisconsin, 1999Every tornado warning in 1999Tornadoes in 1999

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.