Alert archive / Wisconsin / Flash Flood Warnings in 1999

Flash Flood Warning 7, NWS Milwaukee, WI

June 10, 1999Sauk County, Wisconsin

NWS Milwaukee, WI issued this flash flood warning at Jun 10, 1999, 2:23 PM CDT for Sauk County, Wisconsin. It was in force for 67 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 10, 1999, 2:23 PM CDT (19:23 UTC)
Expired
Jun 10, 1999, 3:30 PM CDT
In force
67 min
Issued by
NWS Milwaukee, WI
Area
Whole counties

County Sauk County, WI

The radar

The La Crosse radar (KARX), 109 km from the middle of the area, began a volume at 19:26 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 7.4 hours before the alert went out and 189 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 12:00Z on 1999-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1348 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 12:00Z on 1999-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 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
1348 J/kg
Mixed-layer CIN
-71 J/kg
Mixed-layer LCL
1077 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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, Jun 10, 11:30 AM CDT, 2 hours 53 minutes before
WIZ046-047-051-052-056>060-062>072-101600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1130 AM CDT THU JUN 10 1999

...SLIGHT RISK OF HAZARDOUS WEATHER THIS AFTERNOON AND TONIGHT...
...FOR SOUTH CENTRAL AND SOUTHEAST WISCONSIN...

DISCUSSION...
WARM...HUMID...SUNNY CONDITIONS ARE LEADING TO RAPID DESTABILIZATION
OF THE ATMOSPHERE OVER SOUTHERN WISCONSIN. A CONVECTIVELY INDUCED
DISTURBANCE OVER SOUTH CENTRAL IOWA WILL TRACK NORTHEAST INTO WISCONSIN
LATER THIS AFTERNOON AND EVENING. THE COMBINATION OF THIS DISTURBANCE
AND THE DESTABILIZING ATMOSPHERE WILL LIKELY LEAD TO THUNDERSTORM
DEVELOPMENT THIS AFTERNOON AND EVENING.  SOME OF THESE STORMS MAY
PRODUCE DAMAGING WINDS...LARGE  HAIL AND TORRENTIAL RAINFALL.

SPOTTER ACTIVATION...
STORM SPOTTER GROUPS WILL LIKELY BE NEEDED TODAY OR TONIGHT.

DAVIS
Special weather statement, Jun 10, 11:30 AM CDT, 2 hours 53 minutes before
WIZ046-047-051-052-056>060-062>072-101600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1130 AM CDT THU JUN 10 1999

...SLIGHT RISK OF HAZARDOUS WEATHER THIS AFTERNOON AND TONIGHT...
...FOR SOUTH CENTRAL AND SOUTHEAST WISCONSIN...

DISCUSSION...
WARM...HUMID...SUNNY CONDITIONS ARE LEADING TO RAPID DESTABILIZATION
OF THE ATMOSPHERE OVER SOUTHERN WISCONSIN. A CONVECTIVELY INDUCED
DISTURBANCE OVER SOUTH CENTRAL IOWA WILL TRACK NORTHEAST INTO WISCONSIN
LATER THIS AFTERNOON AND EVENING. THE COMBINATION OF THIS DISTURBANCE
AND THE DESTABILIZING ATMOSPHERE WILL LIKELY LEAD TO THUNDERSTORM
DEVELOPMENT THIS AFTERNOON AND EVENING.  SOME OF THESE STORMS MAY
PRODUCE DAMAGING WINDS...LARGE  HAIL AND TORRENTIAL RAINFALL.

SPOTTER ACTIVATION...
STORM SPOTTER GROUPS WILL LIKELY BE NEEDED TODAY OR TONIGHT.

DAVIS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 1:33 PM CDTSevere Thunderstorm WarningMKXWashington42 min
Jun 10, 1:46 PM CDTSevere Thunderstorm WarningMKXSauk59 min
Jun 10, 2:23 PM CDTFlash Flood WarningMKXSauk3 hr
Jun 10, 2:38 PM CDTSevere Thunderstorm WarningMKXRacine, Walworth, Waukesha67 min
Jun 10, 2:44 PM CDTSevere Thunderstorm WarningMKXJefferson61 min
Jun 10, 3:16 PM CDTSevere Thunderstorm WarningMKXDodge, Washington59 min
Jun 10, 3:53 PM CDTSevere Thunderstorm WarningMKXMilwaukee, Ozaukee67 min
Jun 10, 4:21 PM CDTSevere Thunderstorm WarningMKXRock, Walworth64 min
Jun 10, 4:58 PM CDTSevere Thunderstorm WarningMKXJefferson, Waukesha62 min
Jun 10, 5:56 PM CDTSevere Thunderstorm WarningMKXColumbia, Dodge64 min
Jun 10, 6:23 PM CDTSevere Thunderstorm WarningMKXWalworth62 min
Jun 10, 6:35 PM CDTSevere Thunderstorm WarningMKXKenosha, Racine65 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; radar from the NEXRAD Level II archive.