Alert archive / Iowa / Flash Flood Warnings in 2003
Flash Flood Warning 7, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Jun 25, 2003, 4:00 AM CDT for Cherokee County, Plymouth County, Woodbury County, Iowa. 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 outline as issued.
The facts
- Issued
- Jun 25, 2003, 4:00 AM CDT (09:00 UTC)
- Expired
- Jun 25, 2003, 6:00 AM CDT
- In force
- 2 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
Counties Cherokee County, IA, Plymouth County, IA, Woodbury County, IA
The radar
The Sioux Falls radar (KFSD), 129 km from the middle of the area, began a volume at 09:02 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
Omaha, NE (KOAX), launched 00:00Z, 9.0 hours before the alert went out and 156 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.
- Mixed-layer CAPE
- 3681 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 1413 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 167 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 10.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS53 KFSD 250900
FFWFSD
IAC035-149-193-251100-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
400 AM CDT WED JUN 25 2003
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEAST PLYMOUTH COUNTY IN NORTHWEST IOWA
CHEROKEE COUNTY IN NORTHWEST IOWA
NORTHEAST WOODBURY COUNTY IN NORTHWEST IOWA
* UNTIL 600 AM CDT
* AT 356 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAINFALL WAS OCCURRING OVER THE WARNED AREA. RADAR
ESTIMATES THAT BETWEEN 1 AND 2 INCHES OF RAIN ARE POSSIBLE IN
AN HOUR ACROSS THE AREA. ALSO OTHER THUNDERSTORMS CONTINUE TO
DEVELOP OVER EASTERN NEBRASKA...AND MAY MOVE ACROSS THE WARNED
AREA LATER THIS MORNING PRODUCING FURTHER HEAVY RAINS.
THE RAIN IS FALLING ACROSS THE LITTLE SIOUX RIVER BASIN WHERE GROUND
IS ALREADY SATURATED FROM PREVIOUS RAINS. THIS MAY LEAD TO RAPID
RISES IN THE RIVER LEVELS ACROSS THE WARNED AREA.
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.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH 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.
LAT...LON 4269 9604 4240 9602 4261 9570 4263 9544
4290 9545
$$
BOUSTEAD2 follow-up statements
000 WGUS73 KFSD 251041 FFSFSD IAC035-149-193-251100- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 539 AM CDT WED JUN 25 2003 ...FLASH FLOOD WARNING CONTINUES UNTIL 6 AM FOR... ...SOUTHEAST PLYMOUTH COUNTY IN NORTHWEST IOWA... ...CHEROKEE COUNTY IN NORTHWEST IOWA... ...NORTHEAST WOODBURY COUNTY IN NORTHWEST IOWA... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES THAT THE HEAVIEST RAIN HAS EXITED THE WARNED AREA. RADAR ESTIMATES THAT BETWEEN 1 AND 2 INCHES OF RAIN HAS FALLEN FROM KINGSLEY TO MARCUS TO NEAR CORRECTIONVILLE. RUN OFF FROM THIS RAIN WILL CONTINUE THROUGH 6 AM. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. $$ BOUSTEAD
000 WGUS73 KFSD 251107 FFSFSD IAC035-149-193-251130- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 607 AM CDT WED JUN 25 2003 ...FLASH FLOOD WARNING HAS EXPIRED FOR... ...SOUTHEAST PLYMOUTH COUNTY IN NORTHWEST IOWA... ...CHEROKEE COUNTY IN NORTHWEST IOWA... ...NORTHEAST WOODBURY COUNTY IN NORTHWEST IOWA... LIGHTER SHOWERS AND A FEW THUNDERSTORMS WILL MOVE OVER THE AREA THROUGH MID MORNING. HOWEVER NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES THAT THE HEAVIEST RAIN HAS EXITED THE WARNED AREA. THEREFORE THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE. $$ HACKER
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 10:56 PM CDT | Tornado Warning | FSD | Lyon | 34 min |
| Jun 24, 11:09 PM CDT | Severe Thunderstorm Warning | FSD | Sioux | 36 min |
| Jun 24, 11:30 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 30 min |
Nearby
Flash Flood Warnings in Iowa, 2003Every 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.