Alert archive / Wisconsin / Flash Flood Warnings in 1997

Flash Flood Warning 2, NWS Green Bay, WI

July 16, 1997Waushara County, Wisconsin

NWS Green Bay, WI issued this flash flood warning at Jul 16, 1997, 8:57 PM CDT for Waushara County, Wisconsin. It was in force for 2 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
Jul 16, 1997, 8:57 PM CDT (01:57 UTC)
Expired
Jul 16, 1997, 11:00 PM CDT
In force
2 hr
Issued by
NWS Green Bay, WI
Area
Whole counties

County Waushara County, WI

The radar

The Green Bay radar (KGRB), 100 km from the middle of the area, began a volume at 01:56 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, 2.0 hours before the alert went out and 100 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 1997-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 536 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 1997-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 square meters per square second.19395878Sfc1 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
536 J/kg
Mixed-layer CIN
-290 J/kg
Mixed-layer LCL
2104 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
171 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KGRB 170159
FFWGRB
WIC137-170400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
857 PM CDT WED JUL 16 1997

* FLASH FLOOD WARNING FOR
  WAUSHARA COUNTY - CENTRAL WISCONSIN

* UNTIL 1100 PM CDT
 
* SOME LOCATIONS OR STREAMS AFFECTED
  WAUTOMA
  COLOMA
  HANCOCK
  RICHFORD

* CAUSE AND EFFECT...
  VERY HEAVY RAINFALL FROM THUNDERSTORMS THIS EVENING HAS CAUSED
  FLOODING OVER PORTIONS OF WAUSHARA COUNTY. POLICE IN WAUTOMA AND
  HANCOCK HAVE REPORTED  FLOODING IN THOSE COMMUNITIES.

* FORECAST CONDITIONS...
  DOPPLER RADAR IN GREEN BAY HAS SHOWN 5 TO 6 INCHES OF RAIN
  TODAY OVER WAUSHARA COUNTY...WITH AN ADDITIONAL 2 TO 3 INCHES
  POSSIBLE THROUGH 11 PM.

  LEAVE FLOOD PRONE AND LOW LYING AREAS IMMEDIATELY.
 
  NEVER DRIVE INTO A FLOODED STRETCH OF ROAD.  THE DEPTH OF WATER
  MAY BE ENOUGH TO FLOAT YOUR VEHICLE.

  PLH/DI

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 7:06 PM CDTFlash Flood WarningGRBWaushara119 min
Jul 16, 11:00 PM CDTFlash Flood WarningGRBWaushara7 hr

Nearby

Flash Flood Warnings in Wisconsin, 1997Every 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.