Alert archive / Wisconsin / Flash Flood Warnings in 1998

Flash Flood Warning 13, NWS Milwaukee, WI

August 5, 1998Rock County, Walworth County, Wisconsin

NWS Milwaukee, WI issued this flash flood warning at Aug 5, 1998, 9:00 PM CDT for Rock County, Walworth County, Wisconsin. It was in force for 3 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, 9:00 PM CDT (02:00 UTC)
Expired
Aug 6, 1998, 12:00 AM CDT
In force
3 hr
Issued by
NWS Milwaukee, WI
Area
Whole counties

Counties Rock County, WI, Walworth County, WI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.0 hours before the alert went out and 209 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 1998-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 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 1998-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 square meters per square second.1939Sfc1 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
6 J/kg
Mixed-layer CIN
-161 J/kg
Mixed-layer LCL
940 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
93 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 060202
FFWMKE
WIC105-127-060500-

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

THE NATIONAL WEATHER SERVICE IN MILWAUKEE/SULLIVAN WI HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  ROCK AND NORTHWEST WALWORTH COUNTY IN SOUTHERN WISCONSIN

* UNTIL MIDNIGHT CDT

* AT 900 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED
  ANOTHER BATCH OF THUNDERSTORMS MOVING NORTHWARD ACROSS ROCK AND
  WESTERN WALWORTH COUNTY.

* SOME OF THESE STORMS APPEAR CAPABLE OF PRODUCING RAINFALL RATES IN
  EXCESS OF AN INCH PER HOUR.  THIS WILL LIKELY CAUSE MORE FLOODING
  PROBLEMS IN THE WARNING AREA.

  MOTORISTS SHOULD NOT ATTEMPT TO CROSS ROADS COVERED WITH WATER.

  LISTEN FOR LATER STATEMENTS AND WARNINGS ON THIS DANGEROUS
  SITUATION.

NJ

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 11:59 PM CDTFlash Flood WarningMKXRock, Walworth6 hr
Aug 6, 6:22 AM CDTFlash Flood WarningMKXSheboygan4 hr
Aug 6, 2:04 PM CDTFlash Flood WarningMKXDodge, Jefferson, Waukesha6 hr
Aug 6, 2:04 PM CDTFlash Flood WarningMKXColumbia, Dane, Green6 hr
Aug 6, 2:04 PM CDTFlash Flood WarningMKXLafayette6 hr
Aug 6, 3:05 PM CDTFlash Flood WarningMKXMilwaukee, Ozaukee, Washington5 hr
Aug 6, 6:00 PM CDTFlash Flood WarningMKXRock, Walworth2 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.