Alert archive / Wisconsin / Flash Flood Warnings in 1998

Flash Flood Warning 21, NWS Milwaukee, WI

August 6, 1998Milwaukee County, Waukesha County, Wisconsin

NWS Milwaukee, WI issued this flash flood warning at Aug 6, 1998, 7:55 PM CDT for Milwaukee County, Waukesha 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 6, 1998, 7:55 PM CDT (00:55 UTC)
Expired
Aug 7, 1998, 12:00 AM CDT
In force
4 hr
Issued by
NWS Milwaukee, WI
Area
Whole counties

Counties Milwaukee County, WI, Waukesha County, WI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.9 hours before the alert went out and 162 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 1998-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1998-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
679 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
145 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 070055
FFWMKE
WIC079-133-070500-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
755 PM CDT THU AUG 6 1998

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

* FLASH FLOOD WARNING FOR...
  MILWAUKEE COUNTY IN SOUTHEASTERN WISCONSIN AND
  EASTERN WAUKESHA COUNTY IN SOUTHEASTERN WISCONSIN

* UNTIL MIDNIGHT

* AT 752 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT
  THUNDERSTORMS WERE GRADUALLY DECREASING IN INTENSITY AND AREAL
  COVERAGE.  THIS OVERALL TREND SHOULD CONTINUE THIS EVENING.

* HOWEVER...IT WILL BE AWHILE BEFORE THE WATER IN FLOODED AREAS RECEDES
  TO LEVELS WHERE IT NO LONGER CAUSES SIGNIFICANT PROBLEMS.  AND ANY
  NEW STORMS THAT POP UP WILL ONLY AGGRAVATE THE SITUATION.  SO IT
  IS NECESSARY TO EXTEND THE WARNING FOR A FEW MORE HOURS.

AT 735 PM...THE MENOMONEE RIVER IN WAUWATOSA REACHED A RECORD STAGE
OF 17.82 FEET.  THE OLD RECORD WAS 16.63...SET LAST YEAR ON JUNE 21ST.
FLOOD STAGE IS 9 FEET.

MOTORISTS SHOULD BE ESPECIALLY CAREFUL AT NIGHT AND AVOID DRIVING
INTO MOVING WATER OF UNKNOWN DEPTH...LOW WATER CROSSINGS AND FLOOD
PRONE AREAS.

NJ

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.