Alert archive / Iowa / Flash Flood Warnings in 2004
Flash Flood Warning 5, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at May 22, 2004, 12:03 AM CDT for 4 counties in Iowa. It was in force for 87 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
- May 22, 2004, 12:03 AM CDT (05:03 UTC)
- Expired
- May 22, 2004, 1:30 AM CDT
- In force
- 87 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
Counties Cherokee County, IA, Clay County, IA, O'Brien County, IA, Plymouth County, IA
The radar
The Sioux Falls radar (KFSD), 107 km from the middle of the area, began a volume at 05:04 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, 5.1 hours before the alert went out and 182 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
- 2589 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 1462 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 166 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 6.9
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS53 KFSD 220503
FFWFSD
IAC035-041-141-149-220630-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1203 AM CDT SAT MAY 22 2004
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CHEROKEE COUNTY IN NORTHWEST IOWA
CLAY COUNTY IN NORTHWEST IOWA
OBRIEN COUNTY IN NORTHWEST IOWA
PLYMOUTH COUNTY IN NORTHWEST IOWA
* UNTIL 130 AM CDT
* AT 1154 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
ANOTHER LINE OF THUNDERSTORMS WITH HEAVY RAIN MOVING INTO PLYMOUTH
COUNTY. THESE STORMS WILL MOVE INTO CHEROKEE...OBRIEN...AND CLAY
COUNTIES BY 1245 AM CDT.
ADDITIONAL RAINFALL AMOUNTS OF AROUND ONE TO TWO INCHES ARE POSSIBLE
IN THE WARNED AREA. THIS WILL ADD TO 2 TO 4 INCHES OF RAIN THAT HAS
ALREADY FALLEN IN THIS AREA. THIS ADDITIONAL RAINFALL WILL CAUSE
MORE FLOODING OVER ROADWAYS AND IN FIELDS.
LAT...LON 4291 9649 4257 9649 4257 9589 4291 9539
4291 9493 4325 9496 4314 9570 4291 9587
$$
PSThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 8:19 PM CDT | Tornado Warning | FSD | Plymouth | 41 min |
| May 21, 8:37 PM CDT | Severe Thunderstorm Warning | FSD | Clay, O'Brien | 23 min |
| May 21, 8:56 PM CDT | Tornado Warning | FSD | Plymouth | 49 min |
| May 21, 9:25 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 35 min |
| May 21, 9:33 PM CDT | Severe Thunderstorm Warning | FSD | Clay | 27 min |
| May 21, 9:33 PM CDT | Severe Thunderstorm Warning | FSD | O'Brien | 42 min |
| May 21, 9:59 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Woodbury | 31 min |
| May 21, 10:12 PM CDT | Severe Thunderstorm Warning | FSD | Clay | 33 min |
| May 21, 10:14 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 31 min |
| May 21, 10:29 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista | 16 min |
| May 21, 11:07 PM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 23 min |
| May 21, 11:50 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 25 min |
Nearby
Flash Flood Warnings in Iowa, 2004Every flash flood warning in 2004
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.