Alert archive / Iowa / Flash Flood Warnings in 2003
Flash Flood Warning 12, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Jul 9, 2003, 3:33 AM CDT for Ida County, Iowa. It was in force for 3 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
- Jul 9, 2003, 3:33 AM CDT (08:33 UTC)
- Expired
- Jul 9, 2003, 6:30 AM CDT
- In force
- 3 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
County Ida County, IA
The radar
The Omaha radar (KOAX), 140 km from the middle of the area, began a volume at 08:32 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, 8.6 hours before the alert went out and 140 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
- 1531 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 1503 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 131 m²/s²
- 0-3 km storm-relative helicity
- 235 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 9.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KFSD 090836 FFWFSD IAC093-091130- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 333 AM CDT WED JUL 9 2003 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * FLASH FLOOD WARNING FOR... IDA COUNTY IN NORTHWEST IOWA * UNTIL 630 AM CDT * AT 333 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WERE PRODUCING VERY HEAVY RAINFALL APPROACHING IDA COUNTY. RAINFALL OF 1 TO 3 INCHES HAVE FALLEN IN THE PAST 2 HOURS ACROSS IDA COUNTY. WITH MORE THUNDERSTORMS APPROACHING ANOTHER 1 TO 2 INCHES OF RAIN IS EXPECTED THROUGH 530 AM CDT. THIS WILL RESULT IN FLASH FLOODING. 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 4255 9567 4227 9566 4223 9546 4255 9543 $$ SCHUMACHER
2 follow-up statements
000 WGUS73 KFSD 090952 FFSFSD IAC093-091130- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 451 AM CDT WED JUL 9 2003 ...FLASH FLOOD WARNING CONTINUES UNTIL 630 AM FOR... ...IDA COUNTY IN NORTHWEST IOWA... RAIN CONTINUES ACROSS IDA COUNTY EARLY THIS MORNING...WITH REPORTS OF STREET FLOODING OCCURRING ALONG HIGHWAY M25 NORTH OF GALVA. THE VERY HEAVY RAIN THAT FELL EARLIER HAS ENDED...BUT ADDITIONAL RAINFALL THROUGH MID MORNING WILL CAUSE CONTINUED PROBLEMS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. $$ 08
000 WGUS73 KFSD 091128 FFSFSD IAC093-091330- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 628 AM CDT WED JUL 9 2003 ...FLASH FLOOD WARNING WILL EXPIRE AT 630 AM CDT FOR... ...IDA COUNTY IN NORTHWEST IOWA... THE RAIN HAS ENDED AND FLASH FLOODING IS NO LONGER A THREAT. PLEASE USE CAUTION WHILE TRAVELING EARLY THIS MORNING AS PONDING OF WATER ON ROADWAYS IS STILL LIKELY. $$ 08
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 12:48 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Ida | 27 min |
| Jul 9, 2:16 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 29 min |
| Jul 9, 2:37 AM CDT | Flash Flood Warning | FSD | Cherokee | 113 min |
| Jul 9, 2:44 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 31 min |
| Jul 9, 4:05 AM CDT | Flash Flood Warning | FSD | Buena Vista | 3 hr |
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.