Alert archive / Wisconsin / Flash Flood Warnings in 1997

Flash Flood Warning 3, NWS Green Bay, WI

July 16, 1997Waushara County, Wisconsin

NWS Green Bay, WI issued this flash flood warning at Jul 16, 1997, 11:00 PM CDT for Waushara County, Wisconsin. It was in force for 7 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 16, 1997, 11:00 PM CDT (04:00 UTC)
Expired
Jul 17, 1997, 6:00 AM CDT
In force
7 hr
Issued by
NWS Green Bay, WI
Area
Whole counties

County Waushara County, WI

The radar

The Green Bay radar (KGRB), 100 km from the middle of the area, began a volume at 04:05 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 4.0 hours before the alert went out and 100 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, Green Bay/Straub, WI at 00:00Z on 1997-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 536 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, Green Bay/Straub, WI at 00:00Z on 1997-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 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
536 J/kg
Mixed-layer CIN
-290 J/kg
Mixed-layer LCL
2104 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
171 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KGRB 170403
FFWGRB
WIC137-171100-

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
1100 PM CDT WED JUL 16 1997
 
...FLOOD WARNING FOR THE REMAINDER OF THE NIGHT FOR WAUSHARA
COUNTY...

DOPPLER RADAR INDICATES AS MUCH AS 6 TO 7 INCHES OF RAIN FELL
EARLIER TONIGHT FROM THE THUNDERSTORMS THAT MOVED SLOWLY ACROSS
THAT AREA. IT WILL TAKE SEVERAL HOURS FOR THIS AMOUNT OF WATER
TO RECEDE IN THE AREAS THAT WERE FLOODED.

MORE THUNDERSTORMS MAY MOVE INTO THE AREA TOWARD MORNING. ANY
ADDITIONAL RAIN WILL ONLY AGGRAVATE THE FLOODING SITUATION.
 
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT ATTEMPT TO
CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY.

ISAACSON

The office that day

Everything else NWS Green Bay, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 16, 7:06 PM CDTFlash Flood WarningGRBWaushara119 min
Jul 16, 8:57 PM CDTFlash Flood WarningGRBWaushara2 hr

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.