Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 47, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Jun 6, 1999, 9:24 PM CDT for La Crosse County, Trempealeau County, Wisconsin. It was in force for 61 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, 9:24 PM CDT (02:24 UTC)
- Expired
- Jun 6, 1999, 10:25 PM CDT
- In force
- 61 min
- Issued by
- NWS La Crosse, WI
- Area
- Whole counties
Counties La Crosse County, WI, Trempealeau County, WI
The radar
The La Crosse radar (KARX), 32 km from the middle of the area, began a volume at 02:27 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 6, 5:15 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 2.4 hours before the alert went out and 205 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.
- Mixed-layer CAPE
- 8 J/kg
- Mixed-layer CIN
- -229 J/kg
- Mixed-layer LCL
- 2739 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 195 m²/s²
- 0-3 km storm-relative helicity
- 234 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLSE 070228 COR SVRLSE WIC063-121-070325- BULLETIN - IMMEDIATE BROADCAST REQUESTED...COR SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 925 PM CDT SUN JUN 6 1999 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN TREMPEALEAU COUNTY IN WEST CENTRAL WISCONSIN NORTHERN LA CROSSE COUNTY IN WEST CENTRAL WISCONSIN * UNTIL 1025 PM CDT * AT 923 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS 20 MILES WEST OF LA CROSSE... MOVING NORTHEAST AT 40 MPH. * THIS LINE OF SEVERE THUNDERSTORMS WILL BE NEAR... HOLMEN AND ONALASKA BY 940 PM TREMPEALEAU BY 940 PM THE MAIN THREAT FROM THESE STORMS IS DAMAGING WIND. STAY INSIDE AND AWAY FROM WINDOWS! A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT. REMEMBER SEVERE THUNDERSTORMS CAN...AND OCCASIONALLY DO PRODUCE TORNADOS WITH LITTLE WARNING. NELSON/RIECK
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.
NWS La Crosse, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 6, 2:56 PM CDT, 6 hours 28 minutes earlier.
Area forecast discussion, Jun 6, 2:56 PM CDT, 6 hours 28 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
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 9:05 PM CDT | Severe Thunderstorm Warning | ARX | Buffalo | 50 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 1999Every severe thunderstorm warning 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.