Alert archive / Wisconsin / Flash Flood Warnings in 1997

Flash Flood Warning 5, NWS Milwaukee, WI

June 21, 1997Dodge County, Washington County, Wisconsin

NWS Milwaukee, WI issued this flash flood warning at Jun 21, 1997, 4:16 AM CDT for Dodge County, Washington County, Wisconsin. It was in force for 119 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 21, 1997, 4:16 AM CDT (09:16 UTC)
Expired: Jun 21, 1997, 6:15 AM CDT
In force: 119 min
Issued by: NWS Milwaukee, WI
Area: Whole counties

Counties Dodge County, WI, Washington County, WI

The radar

The Milwaukee radar (KMKX), 48 km from the middle of the area, began a volume at 09:19 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 00:00Z, 9.3 hours before the alert went out and 124 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3468 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 648 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 187 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 9.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMKE 210920
FFWMKE
WIC027-089-131-211115-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
416 AM CDT SAT JUN 21 1997

* FLASH FLOOD WARNING FOR
  SOUTHEASTERN DODGE COUNTY - SOUTHEASTERN WISCONSIN
  SOUTHERN OZAUKEE COUNTY - SOUTHEASTERN WISCONSIN
  SOUTHERN WASHINGTON COUNTY - SOUTHEASTERN WISCONSIN

* UNTIL 615 AM CDT
 
* SOME AREAS AFFECTED
  ASHIPPUN, GERMANTOWN, AND MEQUON.

* CAUSE AND EFFECT
  A NEARLY STATIONARY BAND OF STRONG THUNDERSTORMS WAS PRODUCING
  RAINFALL RATES OF 1 TO 2 INCHES PER HOUR.

* FORECAST CONDITIONS
  ADDITIONAL STORMS ARE FORMING TO THE SOUTH, AND MOVING NORTHWARD
  INTO THE WARNING AREA.

DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

BROWNING

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 2:32 AM CDT	Severe Thunderstorm Warning	MKX	Ozaukee, Sheboygan	48 min
Jun 21, 3:01 AM CDT	Flash Flood Warning	MKX	Milwaukee	119 min
Jun 21, 3:10 AM CDT	Severe Thunderstorm Warning	MKX	Iowa, Lafayette	65 min
Jun 21, 3:55 AM CDT	Severe Thunderstorm Warning	MKX	Dane, Green	55 min
Jun 21, 4:16 AM CDT	Flash Flood Warning	MKX	Ozaukee	119 min
Jun 21, 4:53 AM CDT	Severe Thunderstorm Warning	MKX	Dane, Jefferson	62 min
Jun 21, 5:53 AM CDT	Severe Thunderstorm Warning	MKX	Lafayette	62 min
Jun 21, 6:55 AM CDT	Severe Thunderstorm Warning	MKX	Green	60 min
Jun 21, 7:32 AM CDT	Severe Thunderstorm Warning	MKX	Rock, Walworth	63 min
Jun 21, 7:40 AM CDT	Flash Flood Warning	MKX	Milwaukee, Waukesha	2 hr
Jun 21, 4:54 PM CDT	Flash Flood Warning	MKX	Waukesha	4 hr

Nearby

Flash Flood Warnings in Wisconsin, 1997 Every flash flood warning in 1997

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.