Alert archive / Wisconsin / Flash Flood Warnings in 2003

Flash Flood Warning 11, NWS Green Bay, WI

August 3, 2003Waupaca County, Wisconsin

NWS Green Bay, WI issued this flash flood warning at Aug 3, 2003, 4:25 PM CDT for Waupaca County, Wisconsin. It was in force for 80 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: Aug 3, 2003, 4:25 PM CDT (21:25 UTC)
Expired: Aug 3, 2003, 5:45 PM CDT
In force: 80 min
Issued by: NWS Green Bay, WI
Area: Counties, with a storm outline in the text

County Waupaca County, WI

The radar

The Green Bay radar (KGRB), 75 km from the middle of the area, began a volume at 21:26 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, 9.4 hours before the alert went out and 76 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: 209 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 952 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 29 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 032126
FFWGRB
WIC135-032245-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
425 PM CDT SUN AUG 3 2003

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WAUPACA COUNTY IN WISCONSIN

* UNTIL 545 PM CDT

* AT 425 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A 
CLUSTER OF THUNDERSTORMS WITH TORRENTIAL RAIN AND SMALL HAIL. THE 
STRONGEST STORMS WERE LOCATED GENERALLY ALONG HIGHWAY 49...NEAR THE 
TOWNS OF IOLA...WAUPACA...OGDENSBURG AND WAUPACA. THE STORMS WERE 
NEARLY STATIONARY.

* RADAR ESTIMATES INDICATED UP TO 2 INCHES OF RAIN HAD ALREADY 
FALLEN IN  THIS AREA. THE VERY SLOW MOVEMENT OF THE THUNDERSTORMS 
WILL SIGNIFICANTLY INCREASE THE RISK OF FLASH 
FLOODING...PARTICULARLY IN THOSE AREAS THAT HAVE ALREADY RECEIVED 
EXCESSIVE RAINFALL OVER THE PAST FEW DAYS. 

ANOTHER 1 TO 3 INCHES OF RAIN IS LIKELY IN THIS AREA. SOME LOCATIONS 
WHICH ARE AT HIGHEST RISK OF FLASH FLOODING 
INCLUDE...NORTHLAND...IOLA...MANAWA...SYMCO...KING AND WAUPACA.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER
LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.

LAT...LON 4441 8918 4428 8915 4428 8878 4464 8886
          4464 8920

$$

BRUSKY

2 follow-up statements

000 
WGUS73 KGRB 032156
FFSGRB
WIC135-032245-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
450 PM CDT SUN AUG 3 2003

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR WAUPACA COUNTY...

AT 450 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A 
LINE OF THUNDERSTORMS WITH TORRENTIAL RAIN. THE STORMS CONTINUED TO 
PERSIST GENERALLY ALONG HIGHWAY 49 IN WESTERN WAUPACA COUNTY...NEAR 
THE TOWNS OF WAUPACA...NORTHLAND AND IOLA. THE STORMS WERE NEARLY 
STATIONARY.  A FLASH FLOOD WARNING IS IN EFFECT FOR WAUPACA COUNTY 
UNTIL 545 PM CDT.

RADAR ESTIMATES INDICATED THAT UP TO 3 INCHES OF RAIN HAD FALLEN IN 
THIS AREA SINCE 230 PM CDT. THE VERY SLOW MOVEMENT OF THE THUNDERSTORMS 
WILL SIGNIFICANTLY INCREASE THE RISK OF FLASH FLOODING. ANOTHER 1 TO 
3 INCHES OF RAIN IS LIKELY IN THIS AREA. SOME LOCATIONS WHICH 
CONTINUE TO BE AT HIGH RISK OF FLASH FLOODING 
INCLUDE...WAUPACA...IOLA...KING AND NORTHLAND...AS WELL AS OTHER 
COMMUNITIES NEAR HIGHWAY 49.

AT 445 PM CDT...WAUPACA COUNTY SHERIFF REPORTED 10 TO 12 INCHES OF 
WATER ON SEVERAL STREETS IN THE CITY OF WAUPACA.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER
LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.

$$

BRUSKY

000 
WGUS73 KGRB 032246
FFSGRB
WIC135-032315-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
545 PM CDT SUN AUG 3 2003

...FLASH FLOOD WARNING FOR WAUPACA COUNTY NO LONGER IN EFFECT...

AT 545 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A 
CLUSTER OF THUNDERSTORMS OVER WAUPACA COUNTY.  THE STORMS WERE 
WEAKENING AND MOVING SOUTHEAST AT 20 MPH. THE FLASH FLOOD WARNING 
WHICH HAD BEEN IN EFFECT FOR WAUPACA COUNTY HAS EXPIRED AND IS NO 
LONGER IN EFFECT.

RADAR ESTIMATES INDICATED THAT UP TO 4 INCHES OF RAIN HAD FALLEN IN 
THIS AREA THIS AFTERNOON.  AT 450 PM THE CITY OF WAUPACA REPORTED UP 
TO A FOOT OF WATER ON SOME STREETS.  ALTHOUGH THE HEAVY RAINFALL HAS 
ENDED...PONDING OF WATER ON AREA ROADS AND STREETS IN WAUPACA COUNTY 
WILL LINGER INTO EARLY THIS EVENING.   

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS 
SAFELY. 

$$

HELMAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 12:45 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Kewaunee	30 min
Aug 3, 1:16 PM CDT	Severe Thunderstorm Warning	GRB	Brown	29 min
Aug 3, 1:24 PM CDT	Severe Thunderstorm Warning	GRB	Outagamie, Winnebago	36 min
Aug 3, 1:55 PM CDT	Flash Flood Warning	GRB	Outagamie, Winnebago	3 hr
Aug 3, 3:05 PM CDT	Flash Flood Warning	GRB	Calumet	3 hr

Nearby

Flash Flood Warnings in Wisconsin, 2003 Every flash flood warning in 2003

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.