Alert archive / Wisconsin / Flash Flood Warnings in 1999

Flash Flood Warning 5, NWS Milwaukee, WI

May 17, 1999Green County, Lafayette County, Wisconsin

NWS Milwaukee, WI issued this flash flood warning at May 17, 1999, 4:10 AM CDT for Green County, Lafayette County, Wisconsin. It was in force for 14 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
May 17, 1999, 4:10 AM CDT (09:10 UTC)
Expired
May 17, 1999, 6:00 PM CDT
In force
14 hr
Issued by
NWS Milwaukee, WI
Area
Whole counties

Counties Green County, WI, Lafayette County, WI

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 9.2 hours before the alert went out and 128 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 00:00Z on 1999-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3009 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 1999-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 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
3009 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
1174 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.7
Supercell composite
5.9

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, May 17, 1:56 AM CDT, 2 hours 14 minutes before
WIZ046-047-051-056>058-062>064-067>069-170730-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
156 AM CDT MON MAY 17 1999

THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFECT UNTIL 5 AM HAS
BEEN CANCELLED FOR THE FOLLOWING COUNTIES ONLY...

SAUK...IOWA...LAFAYETTE...MARQUETTE...GREEN LAKE...COLUMBIA...DANE...
GREEN...FOND DU LAC...DODGE...JEFFERSON AND ROCK.

THE WATCH REMAINS IN EFFECT FOR A SMALL CORNER OF FAR SOUTHEAST
WISCONSIN.
Special weather statement, May 17, 1:56 AM CDT, 2 hours 14 minutes before
WIZ046-047-051-056>058-062>064-067>069-170730-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
156 AM CDT MON MAY 17 1999

THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFECT UNTIL 5 AM HAS
BEEN CANCELLED FOR THE FOLLOWING COUNTIES ONLY...

SAUK...IOWA...LAFAYETTE...MARQUETTE...GREEN LAKE...COLUMBIA...DANE...
GREEN...FOND DU LAC...DODGE...JEFFERSON AND ROCK.

THE WATCH REMAINS IN EFFECT FOR A SMALL CORNER OF FAR SOUTHEAST
WISCONSIN.
Special weather statement, May 17, 2:30 AM CDT, 1 hour 40 minutes before
WIZ052-059-060-065-066-070>072-170805-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
230 AM CDT MON MAY 17 1999

...SEVERE THUNDERSTORM WATCH NUMBER 280 HAS BEEN CANCELLED FOR THE
REMAINDER OF SOUTHEAST WISCONSIN...

SEVERE THUNDERSTORM WATCH NUMER 280 HAS BEEN CANCELLED FOR ALL
OF SOUTHERN WISCONSIN.  THE SEVERE WEATHER HAS MOVED OUT OVER LAKE
MICHIGAN WITH THE THREAT OF SEVERE WEATHER FOR SOUTHERN WISCONSIN
OVER FOR THE REMAINDER OF THE NIGHT.

JH
Special weather statement, May 17, 2:30 AM CDT, 1 hour 40 minutes before
WIZ052-059-060-065-066-070>072-170805-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
230 AM CDT MON MAY 17 1999

...SEVERE THUNDERSTORM WATCH NUMBER 280 HAS BEEN CANCELLED FOR THE
REMAINDER OF SOUTHEAST WISCONSIN...

SEVERE THUNDERSTORM WATCH NUMER 280 HAS BEEN CANCELLED FOR ALL
OF SOUTHERN WISCONSIN.  THE SEVERE WEATHER HAS MOVED OUT OVER LAKE
MICHIGAN WITH THE THREAT OF SEVERE WEATHER FOR SOUTHERN WISCONSIN
OVER FOR THE REMAINDER OF THE NIGHT.

JH

The office that day

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

IssuedProductOfficeCountiesLasted
May 16, 7:37 PM CDTSevere Thunderstorm WarningMKXKenosha63 min
May 16, 9:15 PM CDTSevere Thunderstorm WarningMKXLafayette60 min
May 16, 9:20 PM CDTSevere Thunderstorm WarningMKXIowa60 min
May 16, 10:10 PM CDTFlash Flood WarningMKXIowa, Lafayette3 hr
May 16, 10:10 PM CDTFlash Flood WarningMKXSauk3 hr
May 16, 10:17 PM CDTSevere Thunderstorm WarningMKXGreen, Lafayette58 min
May 16, 10:43 PM CDTFlash Flood WarningMKXColumbia, Marquette3 hr
May 16, 11:06 PM CDTSevere Thunderstorm WarningMKXDane59 min
May 16, 11:23 PM CDTFlash Flood WarningMKXGreen3 hr
May 17, 12:30 AM CDTSevere Thunderstorm WarningMKXRock60 min
May 17, 1:24 AM CDTSevere Thunderstorm WarningMKXWalworth61 min
May 17, 1:30 AM CDTSevere Thunderstorm WarningMKXKenosha, Racine60 min

Nearby

Flash Flood Warnings in Wisconsin, 1999Every flash flood warning in 1999

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.