Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 30, NWS La Crosse, WI

August 7, 1996Crawford County, Vernon County, Wisconsin; Allamakee County, Iowa

NWS La Crosse, WI issued this severe thunderstorm warning at Aug 7, 1996, 2:15 AM CDT for Crawford County, Vernon County, Wisconsin; Allamakee County, Iowa. It was in force for 45 min. 6 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: Aug 7, 1996, 2:15 AM CDT (07:15 UTC)
Expired: Aug 7, 1996, 3:00 AM CDT
In force: 45 min
Issued by: NWS La Crosse, WI
Area: Whole counties

Counties Allamakee County, IA, Crawford County, WI, Vernon County, WI

The radar

The La Crosse radar (KARX), 51 km from the middle of the area, began a volume at 07:17 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
Aug 7, 2:20 AM CDT	Thunderstorm Wind 52	Postville, IA
Aug 7, 2:25 AM CDT	Thunderstorm Wind 52	Rossville, IA
Aug 7, 2:36 AM CDT	Thunderstorm Wind 52	Lansing, IA
Aug 7, 2:43 AM CDT	Thunderstorm Wind 52	La Farge, WI
Aug 7, 2:43 AM CDT	Thunderstorm Wind 52	Lynxville, WI
Aug 7, 2:50 AM CDT	Thunderstorm Wind 52	Prairie Du Chien, 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

Davenport, (KDVN), launched 00:00Z, 7.3 hours before the alert went out and 200 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: 4709 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 974 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLSE 070717
SVRLSE
IAC005-WIC023-123-081-070800-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
215 AM CDT WED AUG 7 1996
 
THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  300 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST IOWA
 
   ...ALLAMAKEE COUNTY
 
 
IN SOUTHWEST WISCONSIN
 
   ...CRAWFORD COUNTY...VERNON COUNTY
 
IN WEST CENTRAL WISCONSIN
 
   ...MONROE COUNTY
 
AT 215 AM...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 30 MILES
NORTHEAST OF LA CROSSE TO 5 MILES WEST OF THE CITY OF LA CROSSE TO 20
MILES SOUTHEAST OF DECORAH. THE STORMS WERE MOVING EAST AT 40 MILES AN
HOUR AND WILL AFFECT SPARTA...VIROQUA...FERRYVILLE AND WAUKON BY 230 AM.
 
THIS SEVERE THUNDERSTORM WILL PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN 
INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.
 
THOMPSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 1:26 AM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Trempealeau	34 min
Aug 7, 1:40 AM CDT	Severe Thunderstorm Warning	ARX	Clark, Taylor	50 min
Aug 7, 1:55 AM CDT	Severe Thunderstorm Warning	ARX	La Crosse	35 min
Aug 7, 1:55 AM CDT	Severe Thunderstorm Warning	ARX	Jackson	35 min
Aug 7, 2:15 AM CDT	Severe Thunderstorm Warning	ARX	Monroe	45 min
Aug 7, 2:29 AM CDT	Severe Thunderstorm Warning	ARX	Jackson, La Crosse	16 min
Aug 7, 2:37 AM CDT	Severe Thunderstorm Warning	ARX	Grant	53 min
Aug 7, 2:52 AM CDT	Severe Thunderstorm Warning	ARX	Adams, Juneau	68 min
Aug 7, 2:57 AM CDT	Severe Thunderstorm Warning	ARX	Richland	48 min
Aug 7, 1:45 AM CDT	Severe Thunderstorm Warning	ARX	Winneshiek	45 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1996 Severe Thunderstorm Warnings in Iowa, 1996 Every severe thunderstorm warning in 1996

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.