Alert archive / Wisconsin / Flash Flood Warnings in 2002

Flash Flood Warning 3, NWS Green Bay, WI

April 18, 2002Marinette County, Wisconsin

NWS Green Bay, WI issued this flash flood warning at Apr 18, 2002, 8:30 PM CDT for Marinette County, Wisconsin. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 18, 2002, 8:30 PM CDT (01:30 UTC)
Expired: Apr 18, 2002, 9:00 PM CDT
In force: 30 min
Issued by: NWS Green Bay, WI
Area: Counties, with a storm outline in the text

County Marinette County, WI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.5 hours before the alert went out and 131 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: 188 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 2321 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 216 m²/s²
0-3 km storm-relative helicity: 288 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 
WGUS53 KGRB 190130
FFWGRB
WIC075-190200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
828 PM CDT THU APR 18 2002

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN MARINETTE COUNTY IN WISCONSIN

* UNTIL 900 PM CDT

* AT 828 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
  THUNDERSTORMS WITH TORRENTIAL RAIN. THE STORMS WERE CENTERED NEAR
  DUNBAR...OR 14 MILES SOUTH OF IRON MOUNTAIN MICHIGAN. THE STORMS
  WERE MOVING NORTHEAST AT 35 MPH.

* RADAR ESTIMATES INDICATED THAT UP TO 1 TO 2 INCHES OF RAIN HAD
  FALLEN IN THIS AREA. THE MOVEMENT OF THE STORMS WILL RESULT IN     
  MORE RAIN FALLING OVER AREAS WHICH ALREADY RECEIVED HEAVY RAIN.    
  ANOTHER 1 TO 2 INCHES OF RAIN IS LIKELY IN THIS AREA. SOME         
  LOCATIONS WHICH ARE AT HIGH RISK OF FLASH FLOODING 
  INCLUDE...DUNBAR AND PEMBINE.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND QUICKLY. DO NOT
ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY
FOOT OR BY AUTOMOBILE. IF YOUR VEHICLE STALLS...ABANDON IT
IMMEDIATELY AND SEEK HIGHER GROUND.

LAT...LON 4570 8826 4556 8812 4558 8772 4573 8775

ECKBERG

1 follow-up statement

000 
RWUS32 KGRB 190206
FFSGRB
WIC037-041-075-085-125-190300-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
900 PM CDT THU APR 18 2002

...FLASH FLOOD WARNING FOR VILAS...FOREST...FLORENCE...ONEIDA AND 
NORTHERN MARINETTE COUNTIES NO LONGER IN EFFECT...

AT 900 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A 
CLUSTER OF THUNDERSTORMS OVER MOST OF NORTHERN WISCONSIN. THE STORMS
WERE LOCATED EAST OF A LINE FROM EAGLE RIVER TO 10 MILES WEST OF 
RHINELANDER. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 45 MPH. THE 
STORMS WILL CONTINUE TO MOVE EAST AND BE OUT OF THE AREA BY 
MIDNIGHT. THE FLASH FLOOD WARNING WHICH HAD BEEN IN EFFECT HAS 
EXPIRED AND IS NO LONGER IN EFFECT.

RADAR ESTIMATES INDICATED THAT UP TO 4 INCHES OF RAIN HAD FALLEN IN 
THIS AREA. 

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODS AND FLASH FLOODS. IF FLOODING IS OBSERVED ACT 
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

$$

KALLAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 18, 7:03 PM CDT	Flash Flood Warning	GRB	Florence, Forest, Oneida, Vilas	117 min
Apr 18, 7:17 PM CDT	Severe Thunderstorm Warning	GRB	Florence	28 min
Apr 18, 7:26 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln, Oneida	49 min
Apr 18, 7:26 PM CDT	Tornado Warning	GRB	Marathon	34 min
Apr 18, 7:42 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Shawano	63 min
Apr 18, 7:50 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Menominee	55 min
Apr 18, 8:08 PM CDT	Severe Thunderstorm Warning	GRB	Outagamie, Shawano, Waupaca	52 min
Apr 18, 8:25 PM CDT	Special Marine Warning	GRB		110 min
Apr 18, 8:25 PM CDT	Special Marine Warning	GRB		110 min
Apr 18, 8:25 PM CDT	Special Marine Warning	GRB		110 min
Apr 18, 8:59 PM CDT	Severe Thunderstorm Warning	GRB	Calumet, Winnebago	46 min
Apr 18, 9:13 PM CDT	Severe Thunderstorm Warning	GRB	Manitowoc	32 min

Nearby

Flash Flood Warnings in Wisconsin, 2002 Every flash flood warning in 2002

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.