Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 106, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Jul 13, 1997, 10:58 PM CDT for Jackson County, La Crosse County, Trempealeau County, Wisconsin. It was in force for 62 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 13, 1997, 10:58 PM CDT (03:58 UTC)
- Expired
- Jul 14, 1997, 12:00 AM CDT
- In force
- 62 min
- Issued by
- NWS La Crosse, WI
- Area
- Whole counties
Counties Jackson County, WI, La Crosse County, WI, Trempealeau County, WI
The radar
The La Crosse radar (KARX), 40 km from the middle of the area, began a volume at 03:58 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 13, 11:10 PM CDT | Thunderstorm Wind 52 | Bangor, WI | |
| Jul 13, 11:15 PM CDT | Thunderstorm Wind 52 | Hatfield, WI |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 4.0 hours before the alert went out and 240 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
- 2980 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 915 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 93 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 140400 RRA
SVRLSE
WIC053-063-121-140500-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1058 PM CDT SUN JUL 13 1997
* SEVERE THUNDERSTORM WARNING FOR
SOUTHERN TREMPEALEAU COUNTY - WEST CENTRAL WISCONSIN
JACKSON COUNTY - WEST CENTRAL WISCONSIN
LA CROSSE COUNTY - WEST CENTRAL WISCONSIN
* UNTIL 1200 AM CDT
* SOME LOCATIONS AFFECTED
GALESVILLE
BLACK RIVER FALLS
LA CROSSE
* AT 1050 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS 15 MILES WEST OF BLACK RIVER FALLS
TO NEAR WINONA. THIS LINE OF STORMS WAS MOVING EAST AT 30 MPH.
TREES WERE REPORTED DOWN IN INDEPENDENCE AROUND 1045 PM.
* THESE STORMS WILL BE NEAR BLACK RIVER FALLS AND LA CROSSE BY 1120
PM.
THE MAIN THREAT FROM THESE STORMS IS DAMAGING WINDS. DO NOT GO
OUTDOORS.
RRS
&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 Jul 13, 2:55 PM CDT, 8 hours 3 minutes earlier.
Area forecast discussion, Jul 13, 2:55 PM CDT, 8 hours 3 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LA CROSSE WI 255 PM CDT SUN JUL 13 1997 FORECAST PROBLEMS TONIGHT ARE CHANCES AND INTENSITY OF THUNDERSTORMS. EARLY THIS AFTERNOON A WARM...MOIST AND UNSTABLE AIRMASS REMAINED IN PLACE ACROSS THE UPPER MIDWEST. THE COLD FRONT/SURFACE TROUGH WAS IN THE EASTERN DAKOTAS INTO EASTERN NEBRASKA. 12Z NGM APPEARED CLOSE WITH 18Z SURFACE FEATURES...WHILE BOTH NGM/ETA WERE SIMILAR AND CLOSE WITH UPPER FEATURES. 18Z SURFACE RUC ANALYSIS INDICATED STRENGTHENING SURFACE CONVERGENCE INTO THE SD/MN/NE/IA BORDER AREA. LACK OF CUMULUS ACROSS SOUTHCENTRAL MN...SOUTHWEST INTO KS INDICATING WHERE CAP IS STRONG THIS AFTERNOON. 12Z MODELS SIMILAR IN TRACKING THE STRONG NORTHERN PLAINS SHORTWAVE IN TO NORTHWEST MN AND MOVING THE COLD FRONT/TROUGH TO NEAR KDLH-KLSE-KDSM BY 12Z MON. CONVECTION EXPECTED TO FIRE ALONG THE FRONT/TROUGH IN THE SD/MN/NE/IA BORDER AREA LATER THIS AFTERNOON AS MID AND UPPER LEVEL COOLING ASSOCIATED WITH THE WESTERN SD SHORTWAVE ERODES THE CAP. UPPER LEVEL DIVERGENCE WITH THE SHORTWAVE/UPPER JET SHOULD AUGMENT LOW LEVEL CONVERGENCE IN THAT AREA AS WELL. MESO ANALYSIS INDICATING LI/S TO -10 OR LESS OVER MUCH OF IOWA...SOUTHERN MN/WI AHEAD OF THE FRONT EARLY THIS AFTERNOON...FOR RAPID DEVELOPMENT ONCE CAP GOES. STORMS SHOULD THEN RIDE THE SHORTWAVE/COLD FRONT/TROUGH EAST INTO THE FORECAST AREA OVERNIGHT. INCREASING SHEAR WITH THE APPROACHING UPPER TROUGH WILL HELP TO ORGANIZE STORMS TONIGHT WITH SEVERE CONVECTIVE WIND GUSTS POSSIBLE...DAY 1 SEVERE OUTLOOK LOOKS GOOD. AIRMASS OVER THE FORECAST AREA IS ALMOST TOO WARM FOR SIGNIFICANT HAIL TONIGHT... FREEZING LEVELS AT OR ABOVE 14000 FT. PRECIPITABLE WATERS OF 1.5 TO 2 INCHES WILL MAKE LOCALLY HEAVY RAINS A REAL THREAT WITH ANY STORMS TONIGHT. ANY STORMS IN THE FORECAST AREA TONIGHT SHOULD HAVE FORWARD SPEEDS NEAR 25 MPH...KEEPING THE FLASH FLOOD THREAT DOWN. NGM-FWC/AVN-FAN TEMPERATURE GUIDANCE SIMILAR AND LOOK GOOD FOR TONIGHT. POPS FOR TONIGHT SIMILAR AS WELL...WENT AT OR ABOVE THE LIGHTLY HIGHER FAN NUMBERS. RRS
Nearby
Severe Thunderstorm Warnings in Wisconsin, 1997Every severe thunderstorm warning in 1997
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.