Alert archive / Wisconsin / Flash Flood Warnings in 1993

Flash Flood Warning 18, NWS Green Bay, WI

July 9, 1993Green County, Iowa County, Wisconsin

NWS Green Bay, WI issued this flash flood warning at Jul 9, 1993, 1:21 AM CDT for Green County, Iowa County, Wisconsin. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Jul 9, 1993, 1:21 AM CDT (06:21 UTC)
Expired
Jul 9, 1993, 7:30 AM CDT
In force
6 hr
Issued by
NWS Green Bay, WI
Area
Whole counties

Counties Green County, WI, Iowa County, WI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 6.4 hours before the alert went out and 231 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 1993-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 45 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 1993-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 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
45 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
672 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
206 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 KMSN 090622
FFWMSN
WIC045-049-091230-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MADISON WI
121 AM CDT FRI JUL 9 1993
 
THE NATIONAL WEATHER SERVICE IN MADISON HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  730 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL WISCONSIN
 
   ...GREEN COUNTY...IOWA COUNTY
 
AT 120 AM CDT RADAR DETECTED STRONG TO SEVERE THUNDERSTORMS WITH VERY
HEAVY RAINFALL OVER IOWA AND GREEN COUNTIES. HAM RADIO REPORTS INDICATE
THAT 2 INCHES OF RAIN FELL IN HOLLANDALE OR 35 MILES SOUTHWEST OF
MADISON BETWEEN 1230 AND 100 AM.
 
THE GROUND OVER BOTH IOWA AND GREEN COUNTIES IS SATURATED FROM RECENT
RAINS AND MORE RAINFALL WILL RUN OFF QUICKLY.
 
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.
 
 
PIERCE
&

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 9, 12:25 AM CDTSevere Thunderstorm WarningGRBIowa65 min
Jul 9, 1:08 AM CDTSevere Thunderstorm WarningGRBDane52 min
Jul 9, 1:23 AM CDTFlash Flood WarningGRBDane6 hr
Jul 9, 1:41 AM CDTFlash Flood WarningGRBColumbia6 hr
Jul 9, 2:07 AM CDTFlash Flood WarningGRBGreen Lake, Marquette6 hr

Nearby

Flash Flood Warnings in Wisconsin, 1993Every flash flood warning in 1993

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.