Alert archive / Wisconsin / Flash Flood Warnings in 1990
Flash Flood Warning 4, NWS La Crosse, WI
NWS La Crosse, WI issued this flash flood warning at Aug 18, 1990, 2:41 AM CDT for Monroe County, Wisconsin. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Aug 18, 1990, 2:41 AM CDT (07:41 UTC)
- Expired
- Aug 18, 1990, 8:45 AM CDT
- In force
- 6 hr
- Issued by
- NWS La Crosse, WI
- Area
- Whole counties
County Monroe County, WI
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 7.7 hours before the alert went out and 209 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
- 729 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 740 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 47 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 KMSN 180741
FFWLSE
WIC081-181345-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
ISSUED BY MADISON WI
241 AM CDT SAT AUG 18 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 845 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN WEST CENTRAL WISCONSIN
...MONROE
MONROE COUNTY SHERIFFS REPORTS FLOODING AND MUD SLIDES ALONG I90 NEAR
JACKSON PASS. THE INTERSTATE IS TEMPORARILY CLOSED
BETWEEN TOMAH AND SPARTA.
MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A
SMALL ONE...ON FOOT.What forecasters said that day
The local office's own words before this flash flood 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, Aug 17, 8:51 PM CDT, 5 hours 50 minutes before
MNZ0019-190300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCHESTER MN 845 PM CDT FRI AUG 17 1990 ...STRONG THUNDERSTORMS DEVELOPING IN SOUTHEASTERN MINNESOTA... STRONG THUNDERSTORMS WITH HEAVY RAIN HAVE DEVELOPED IN SOUTHEASTERN MINNESOTA IN NORTHERN WINONA COUNTY. AT 845 PM CDT THE THUNDERSTORMS WERE LOCATED 18 MILES NORTHWEST OF THE TOWN OF WINONA. THE THUNDERSTORMS WERE MOVING EAST AT 15 MPH AND SHOULD CROSS THE MISSISSIPPI RIVER INTO WISCONSIN BY 930 P.M. THE THUNDERSTORMS WILL PRODUCE HEAVY RAINS...DANGEROUS LIGHTNING... AND POSSIBLY SOME SMALL HAIL. SHOWERS AND THUNDERSTORMS...SOME WITH LOCALLY HEAVY RAIN WILL CONTINUE TO DEVELOP IN SOUTHERN AND SOUTHEASTERN MINNES1OTA THROUGH THE NIGHT. BECHTOLD
Special weather statement, Aug 17, 9:13 PM CDT, 5 hours 28 minutes before
WIZ010-014-180300- SPECIAL WEATHER STATEMENT AND AREA WEATHER UPDATE NATIONAL WEATHER SERVICE LA CROSSE WI 913 PM CDT FRI AUG 17 1990 ...STRONG THUNDERSTORMS MOVING THROUGH CRAWFORD COUNTY AND INTO NORTHWEST BUFFALO COUNTY... AT 910 PM CDT...RADAR INDICATED STRONG THUNDERSTORMS IN CRAWFORD COUNTY FROM NEAR DE SOTA 30 MILES SOUTH OF LA CROSSE TO NEAR BOSCOBEL IN GRANT COUNTY. ANOTHER AREA OF STRONG THUNDERSTORMS WAS MOVING INTO BUFFALO COUNTY NEAR MAXVILLE 60 MILES NORTHWEST OF LA CROSSE. ALL THUNDERSTORMS WERE MOVING EAST AT 10 TO 15 MILES AN HOUR. STRONG THUNDERSTORMS WILL CONTINUETO AFFECT BUFFALO AND CRAWFORD COUNTIES UNTIL 1000 PM. HEAVY RAIN...DANGEROUS LIGHTNING...SMALL HAIL AND SOME URBAN AND SMALL STREAM FLOODING IS POSSIBLE WITH THESE STORMS. IF YOU ARE IN THE PATH OF THESE STORMS PLEASE REMAIN ALERT FOR CHANGING WEATHER CONDITIONS AND BE PREPARED TO GO INDOORS IF AND STAY THERE IF A THUNDERSTORM APPROACHES YOUR LOCATION. COUCH
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 3:38 PM CDT | Severe Thunderstorm Warning | ARX | Trempealeau | 37 min |
| Aug 18, 6:18 PM CDT | Flash Flood Warning | ARX | Monroe | 92 min |
Nearby
Flash Flood Warnings in Wisconsin, 1990Every flash flood warning in 1990
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.