Alert archive / Wisconsin / Flash Flood Warnings in 1998

Flash Flood Warning 10, NWS Milwaukee, WI

August 5, 1998Green County, Rock County, Wisconsin

NWS Milwaukee, WI issued this flash flood warning at Aug 5, 1998, 4:45 PM CDT for Green County, Rock 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
Aug 5, 1998, 4:45 PM CDT (21:45 UTC)
Expired
Aug 5, 1998, 9:00 PM CDT
In force
4 hr
Issued by
NWS Milwaukee, WI
Area
Whole counties

Counties Green County, WI, Rock County, WI

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.8 hours before the alert went out and 152 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 1998-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 288 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 1998-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
288 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
524 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
44 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 KMKE 052145
FFWMKE
WIC045-065-105-060140-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
445 PM CDT WED AUG 5 1998

THE NATIONAL WEATHER SERVICE IN MILWAUKEE/SULLIVAN WI HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GREEN COUNTY IN SOUTH CENTRAL WISCONSIN
  LAFAYETTE COUNTY IN SOUTH CENTRAL WISCONSIN
  ROCK COUNTY IN SOUTH CENTRAL WISCONSIN

* UNTIL 900 PM CDT

* AT 430 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A BAND OF THUNDERSTORMS BETWEEN DARLINGTON AND JANESVILLE.  THESE
  STORMS WERE DUMPING HEAVY RAINS AS THEY DRIFTED SLOWLY NORTHWARD
  ACROSS LOCATIONS THAT HAD RECEIVED VERY HEAVY RAINS EARLIER.

* THUNDERSTORMS ARE EXPECTED TO CONTINUE OVER MANY LOCATIONS IN
  THESE THREE COUNTIES EARLY THIS EVENING.  SOME OF THESE STORMS
  MAY PRODUCE RAINFALL OF UP TO 1 OR 2 INCHES PER HOUR.


IF YOU ARE OUTDOORS...MOVE TO A PLACE OF SHELTER IMMEDIATELY IF A
STORM APPROACHES.  MOTORISTS SHOULD REMAIN ALERT FOR REDUCED
VISIBILITIES DURING DOWNPOURS OF RAIN.  STREETS MAY FLOOD QUICKLY.

NJ/WB/TH

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 8:42 AM CDTFlash Flood WarningMKXRock3 hr
Aug 5, 4:45 PM CDTFlash Flood WarningMKXLafayette4 hr
Aug 5, 6:35 PM CDTFlash Flood WarningMKXWalworth2 hr

Nearby

Flash Flood Warnings in Wisconsin, 1998Every flash flood warning in 1998

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.