Alert archive / Iowa / Flash Flood Warnings in 2003
Flash Flood Warning 4, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Jun 24, 2003, 2:25 AM CDT for Cherokee County, Ida County, Woodbury County, Iowa. It was in force for 4 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 24, 2003, 2:25 AM CDT (07:25 UTC)
- Expired
- Jun 24, 2003, 6:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
Counties Cherokee County, IA, Ida County, IA, Woodbury County, IA
The radar
The Sioux Falls radar (KFSD), 139 km from the middle of the area, began a volume at 07:26 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
Minneapolis, MN (KMPX), launched 00:00Z, 7.4 hours before the alert went out and 292 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
- 1955 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1314 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 6.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KFSD 240726 FFWFSD IAC035-093-193-241100- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 225 AM CDT TUE JUN 24 2003 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHERN CHEROKEE COUNTY IN NORTHWEST IOWA NORTHEASTERN WOODBURY COUNTY IN NORTHWEST IOWA NORTHWESTERN IDA COUNTY IN NORTHWEST IOWA * UNTIL 600 AM CDT * AT 223 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAINFALL WAS CONTINUING OCCURRING OVER MUCH OF WOODBURY...NORTHERN IDA...AND SOUTHERN CHEROKEE COUNTY. THUNDERSTORMS WERE CONTINUING TO REDEVELOP...AND WILL MOVE OVER THE ALREADY SATURATED AND HILLY AREAS OF SOUTHERN CHEROKEE...NORTHEASTERN WOODBURY...AND NORTHWESTERN IDA COUNTIES. RADAR ESTIMATES FROM 3 TO 4 INCHES OF RAINFALL ARE COMMON IN THESE AREAS...WITH AN ADDITIONAL INCH OR TWO EXPECTED THROUGH THE NEXT HOUR OR TWO. 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 4275 9541 4257 9541 4247 9588 4274 9586 $$ CHAPMAN
3 follow-up statements
000 WGUS73 KFSD 240856 FFSFSD IAC035-093-193-240915- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 355 AM CDT TUE JUN 24 2003 ...FLASH FLOOD WARNING CONTINUES UNTIL 600 AM CDT FOR... ...SOUTHERN CHEROKEE COUNTY IN NORTHWEST IOWA... ...NORTHEASTERN WOODBURY COUNTY IN NORTHWEST IOWA... ...NORTHWESTERN IDA COUNTY IN NORTHWEST IOWA... AT 355 AM...SHOWERS AND THUNDERSTORMS CONTINUE TO MOVE THROUGH NORTHWEST IOWA...BUT ARE SLOWLY STARTING TO END OVER WESTERN PORTIONS OF WOODBURY COUNTY. OVER THE PAST TWO HOURS...A RADAR ESTIMATED 1 TO 2 INCHES RAINFALL HAS BEEN ADDED TO THE ALREADY SATURATED GROUND. NUMEROUS SMALL CREEKS AND DRAWS WILL CONTINUE TO FIND RISING WATERS IN THE HILLY TERRAIN OF THE LITTLE SIOUX RIVER BASIN. LAW ENFORCEMENT FOR WOODBURY COUNTY REPORTED FLOODING OF CREEKS IN PIERSON...IN NORTHEASTERN WOODBURY COUNTY. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. $$ CHAPMAN
000 WGUS73 KFSD 240858 CCA FFSFSD IAC035-093-193-241100- FLASH FLOOD STATEMENT...CORRECTED EXPIRATION TIME NATIONAL WEATHER SERVICE SIOUX FALLS SD 355 AM CDT TUE JUN 24 2003 ...FLASH FLOOD WARNING CONTINUES UNTIL 600 AM CDT FOR... ...SOUTHERN CHEROKEE COUNTY IN NORTHWEST IOWA... ...NORTHEASTERN WOODBURY COUNTY IN NORTHWEST IOWA... ...NORTHWESTERN IDA COUNTY IN NORTHWEST IOWA... AT 355 AM...SHOWERS AND THUNDERSTORMS CONTINUE TO MOVE THROUGH NORTHWEST IOWA...BUT ARE SLOWLY STARTING TO END OVER WESTERN PORTIONS OF WOODBURY COUNTY. OVER THE PAST TWO HOURS...A RADAR ESTIMATED 1 TO 2 INCHES RAINFALL HAS BEEN ADDED TO THE ALREADY SATURATED GROUND. NUMEROUS SMALL CREEKS AND DRAWS WILL CONTINUE TO FIND RISING WATERS IN THE HILLY TERRAIN OF THE LITTLE SIOUX RIVER BASIN. LAW ENFORCEMENT FOR WOODBURY COUNTY REPORTED FLOODING OF CREEKS IN PIERSON...IN NORTHEASTERN WOODBURY COUNTY. 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. $$ CHAPMAN
000 WGUS73 KFSD 241142 FFSFSD IAC035-093-193-241230- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 640 AM CDT TUE JUN 24 2003 ...FLASH FLOOD WARNING HAS EXPIRED FOR... ...SOUTHERN CHEROKEE COUNTY IN NORTHWEST IOWA... ...NORTHEASTERN WOODBURY COUNTY IN NORTHWEST IOWA... ...NORTHWESTERN IDA COUNTY IN NORTHWEST IOWA... THUNDERSTORMS HAVE ENDED ACROSS NORTHWEST IOWA...AND NO FURTHER RAINFALL IS EXPECTED THIS MORNING. THEREFORE THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE. AN OBSERVER IN CORRECTIONVILLE IOWA REPORTED 3.49 INCHES OF RAINFALL OVERNIGHT. THIS RAINFALL HAS RESULTED IN A RAPID RISE IN THE RIVER LEVEL ON THE LITTLE SIOUX RIVER. ALTHOUGH STILL BELOW FLOOD STAGE AS OF 6 AM CDT...PERSONS LIVING ALONG THE LITTLE SIOUX RIVER SHOULD WATCH FOR CONTINUED RISES...AND TAKE APPROPRIATE ACTION IF NECESSARY. $$ HACKER
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 9:12 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 48 min |
| Jun 23, 9:37 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 23 min |
| Jun 23, 10:02 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 28 min |
| Jun 23, 10:22 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Plymouth | 38 min |
| Jun 23, 10:38 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista | 52 min |
| Jun 23, 10:50 PM CDT | Tornado Warning | FSD | Ida, Woodbury | 25 min |
| Jun 23, 11:12 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 48 min |
| Jun 23, 11:19 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 56 min |
| Jun 23, 11:21 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 39 min |
| Jun 23, 11:31 PM CDT | Severe Thunderstorm Warning | FSD | Sioux | 44 min |
| Jun 23, 11:37 PM CDT | Severe Thunderstorm Warning | FSD | Clay, O'Brien | 53 min |
| Jun 23, 11:53 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 22 min |
| Jun 23, 11:55 PM CDT | Severe Thunderstorm Warning | FSD | Ida | 65 min |
| Jun 24, 12:05 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 25 min |
| Jun 24, 12:16 AM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee | 44 min |
| Jun 24, 12:52 AM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 38 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.