Alert archive / Wisconsin / Flash Flood Warnings in 1997

Flash Flood Warning 10, NWS La Crosse, WI

August 23, 1997Winona County, Minnesota; La Crosse County, Trempealeau County, Wisconsin

NWS La Crosse, WI issued this flash flood warning at Aug 23, 1997, 8:06 PM CDT for Winona County, Minnesota; La Crosse County, Trempealeau County, Wisconsin. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 23, 1997, 8:06 PM CDT (01:06 UTC)
Expired
Aug 23, 1997, 11:00 PM CDT
In force
3 hr
Issued by
NWS La Crosse, WI
Area
Whole counties

Counties Winona County, MN, La Crosse County, WI, Trempealeau County, WI

The radar

The La Crosse radar (KARX), 33 km from the middle of the area, began a volume at 01:07 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.1 hours before the alert went out and 194 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, Minneapolis, MN at 00:00Z on 1997-08-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3368 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, Minneapolis, MN at 00:00Z on 1997-08-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 122 square meters per square second.19395878Sfc1 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
3368 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1119 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
122 m²/s²
0-3 km storm-relative helicity
207 m²/s²
Significant tornado parameter
2.0
Supercell composite
12.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLSE 240107
FFWLSE
MNC169-WIC011-063-121-240400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
806 PM CDT SAT AUG 23 1997

* FLASH FLOOD WARNING FOR
    BUFFALO COUNTY - WEST CENTRAL WISCONSIN
    SOUTHERN TREMPEALEAU COUNTY - WEST CENTRAL WISCONSIN
    LA CROSSE COUNTY - WEST CENTRAL WISCONSIN
    EASTERN WINONA COUNTY - SOUTHEASTERN MINNESOTA

* UNTIL 1100 PM CDT
 
* SOME LOCATIONS OR STREAMS AFFECTED
    WINONA
    LA CROSSE
    CENTERVILLE
    FOUNTAIN CITY

* CAUSE AND EFFECT...
    SEVERE THUNDERSTORMS HAVE PRODUCED VERY HEAVY RAINFALL ACROSS
    THE WARNED COUNTIES. RADAR ESTIMATED 2 TO 3 INCHES HAVE
    FALLEN IN PORTIONS OF SOUTHERN BUFFALO...WITH 1 TO 2 INCHES IN
    EASTERN WINONA. STREET FLOODING HAS BEEN REPORTED IN WINONA AND
    LA CROSSE.

* FORECAST CONDITIONS...
    AN ADDITIONAL 1 TO 2 INCHES OF RAIN IS POSSIBLE FOR THE NEXT
    2 TO 3 HOURS

LEAVE FLOOD PRONE AND LOW LYING AREAS IMMEDIATELY.

RIECK
 

&

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 23, 7:03 PM CDTTornado WarningARXWinona37 min
Aug 23, 7:34 PM CDTTornado WarningARXWinona46 min
Aug 23, 8:18 PM CDTSevere Thunderstorm WarningARXHouston62 min
Aug 23, 8:20 PM CDTTornado WarningARXWinona60 min
Aug 23, 8:58 PM CDTSevere Thunderstorm WarningARXFillmore47 min
Aug 23, 9:06 PM CDTTornado WarningARXHouston34 min
Aug 23, 9:59 PM CDTSevere Thunderstorm WarningARXFillmore46 min
Aug 23, 7:25 PM CDTTornado WarningARXBuffalo45 min
Aug 23, 7:33 PM CDTTornado WarningARXLa Crosse32 min
Aug 23, 7:54 PM CDTSevere Thunderstorm WarningARXTrempealeau66 min
Aug 23, 8:00 PM CDTSevere Thunderstorm WarningARXLa Crosse60 min
Aug 23, 8:06 PM CDTFlash Flood WarningARXBuffalo3 hr

Nearby

Flash Flood Warnings in Wisconsin, 1997Flash Flood Warnings in Minnesota, 1997Every flash flood 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.