Alert archive / Wisconsin / Flash Flood Warnings in 1997

Flash Flood Warning 9, NWS La Crosse, WI

July 26, 1997Vernon County, Wisconsin

NWS La Crosse, WI issued this flash flood warning at Jul 26, 1997, 3:18 PM CDT for Vernon County, Wisconsin. It was in force for 4 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
Jul 26, 1997, 3:18 PM CDT (20:18 UTC)
Expired
Jul 26, 1997, 7:00 PM CDT
In force
4 hr
Issued by
NWS La Crosse, WI
Area
Whole counties

County Vernon County, WI

The radar

The La Crosse radar (KARX), 38 km from the middle of the area, began a volume at 20:22 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

Davenport, (KDVN), launched 12:00Z, 8.3 hours before the alert went out and 221 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, Davenport, at 12:00Z on 1997-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2842 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 1997-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.193958Sfc1 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
2842 J/kg
Mixed-layer CIN
-135 J/kg
Mixed-layer LCL
1370 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLSE 262019
FFWLSE
WIC123-270000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
318 PM CDT SAT JUL 26 1997

* FLASH FLOOD WARNING FOR
    VERNON COUNTY - SOUTHWESTERN WISCONSIN

* UNTIL 700 PM CDT
 
* SOME LOCATIONS OR STREAMS AFFECTED
    KICKAPOO RIVER
    SMALL RIVERS AND STREAMS ACROSS THE COUNTY

* CAUSE AND EFFECT...
    STRONG THUNDERSTORMS WITH RAINFALL RATES OVER AN INCH PER HOUR
    WERE MOVING ACROSS .THE COUNTY.

* FORECAST CONDITIONS...
    ACCUMULATIONS OF UP TO TWO INCHES CAN BE EXPECTED BY 5 PM.

LEAVE FLOOD PRONE AND LOW LYING AREAS IMMEDIATELY.

NELSON/LUSSKY

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 26, 3:30 PM CDTSevere Thunderstorm WarningARXJuneau, Vernon45 min
Jul 26, 3:55 PM CDTSevere Thunderstorm WarningARXAdams50 min

Nearby

Flash Flood Warnings in Wisconsin, 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.