Alert archive / Minnesota / Flash Flood Warnings in 1997

Flash Flood Warning 7, NWS La Crosse, WI

July 19, 1997Winona County, Minnesota

NWS La Crosse, WI issued this flash flood warning at Jul 19, 1997, 10:49 AM CDT for Winona County, Minnesota. 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 19, 1997, 10:49 AM CDT (15:49 UTC)
Expired
Jul 19, 1997, 2:30 PM CDT
In force
4 hr
Issued by
NWS La Crosse, WI
Area
Whole counties

County Winona County, MN

The radar

The La Crosse radar (KARX), 51 km from the middle of the area, began a volume at 15:51 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 12:00Z, 3.8 hours before the alert went out and 174 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 12:00Z on 1997-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1867 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, Minneapolis, MN at 12:00Z on 1997-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 148 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
1867 J/kg
Mixed-layer CIN
-97 J/kg
Mixed-layer LCL
675 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
148 m²/s²
0-3 km storm-relative helicity
273 m²/s²
Significant tornado parameter
0.0
Supercell composite
16.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLSE 191551
FFWLSE
MNC169-191930-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1049 AM CDT SAT JUL 19 1997

* FLASH FLOOD WARNING FOR
    WINONA COUNTY - SOUTHEASTERN MINNESOTA

* UNTIL 230 PM CDT
 
* SOME LOCATIONS OR STREAMS AFFECTED
    ALL RIVERS AND STREAMS IN WINONA COUNTY
    GARVIN BROOK

* CAUSE AND EFFECT...
    VERY HEAVY RAINFALL FROM SLOW MOVING THUNDERSTORMS HAS CAUSED
    FLOODING ACROSS THE COUNTY

* FORECAST CONDITIONS...
    AN ADDITIONIAL ONE INCH OF RAIN CAN BE EXPECTED BETWEEN 11 AM
    AND NOON.  OTHER THUNDERSTORMS WILL BRING ADDITIONAL RAIN
    THIS AFTERNOON

LEAVE FLOOD PRONE AND LOW LYING AREAS IMMEDIATELY.
THE WINONA COUNT<Y EOC HAS REPORTED THAT A TWO TO THREE FOOT HIGH
WALL OF WATER IS HEADED TOWARDS STOCKTON ALONG GRAVIN BROOK.  IF
YOU ARE IN A LOW LYING AREA TAKE ACTION IMMEDIATELY.

NELSON
 

&

Nearby

Flash 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.