Alert archive / Iowa / Flash Flood Warnings in 2007
Flash Flood Warning 13, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at May 5, 2007, 11:06 PM CDT for 4 counties in Iowa. It was in force for 6 hr. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 5, 2007, 11:06 PM CDT (04:06 UTC)
- Expired
- May 6, 2007, 5:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Cherokee County, IA, Ida County, IA, Plymouth County, IA, Woodbury County, IA
The radar
The Sioux Falls radar (KFSD), 135 km from the middle of the area, began a volume at 04:08 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 6, 2:45 AM CDT | FLASH FLOOD | 2 N Galva, IA | COUNTY ROADS FLOODED |
| May 6, 2:45 AM CDT | FLASH FLOOD | 5 S Aurelia, IA | COUNTY ROADS FLOODED |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 4.1 hours before the alert went out and 145 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
- 2431 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 1133 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 7.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KFSD 060407 FFWFSD IAC035-093-149-193-061000- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 1106 PM CDT SAT MAY 5 2007 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * FLASH FLOOD WARNING FOR... CHEROKEE COUNTY IN NORTHWEST IOWA IDA COUNTY IN NORTHWEST IOWA PLYMOUTH COUNTY IN NORTHWEST IOWA WOODBURY COUNTY IN NORTHWEST IOWA * UNTIL 500 AM CDT * AT 1103 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LARGE AREA OF THUNDERSTORMS OVER EASTERN NEBRASKA. THESE STORMS WILL MOVE IN TO NORTHWEST IOWA...AND HAVE THE POTENTIAL TO PRODUCE 2 TO 4 INCHES OF ADDITIONAL RAINFALL. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SALIX...ANTHON...LAWTON...MOVILLE...CORRECTIONVILLE...CUSHING... HOLSTEIN...PIERSON...GALVA...HINTON...KINGSLEY...WASHTA...QUIMBY... MERRILL...LE MARS...AURELIA...CHEROKEE...REMSEN...MARCUS... CLEGHORN...CRAIG...STRUBLE AND LARRABEE ADDITIONAL RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN THE WARNED AREA. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. 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. 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. MOVE TO HIGHER GROUND. LAT...LON 4225 9630 4225 9540 4290 9541 4291 9654 $$ 08
2 follow-up statements
000 WGUS73 KFSD 060732 FFSFSD FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 229 AM CDT SUN MAY 6 2007 IAC035-093-149-193-061000- CHEROKEE IA-PLYMOUTH IA-WOODBURY IA-IDA IA- 229 AM CDT SUN MAY 6 2007 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 AM CDT FOR IDA...WOODBURY...PLYMOUTH AND CHEROKEE COUNTIES... AT 228 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE NUMEROUS SHOWERS AND THUNDERSTORMS OVER THE WARNED AREA. WIDESPREAD RAINFALL AMOUNTS OF THREE QUARTERS TO 1.25 INCHES HAVE OCCURRED...WITH UP TO 4 INCHES IN PORTIONS OF EASTERN IDA COUNTY. ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES IS LIKELY THROUGH 5 AM WITH THE HEAVIEST AMOUNTS IN IDA COUNTY. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. LAT...LON 4225 9630 4225 9540 4290 9541 4291 9654 $$ CJ
000 WGUS73 KFSD 060954 FFSFSD FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 452 AM CDT SUN MAY 6 2007 IAC035-093-149-193-061002- CHEROKEE IA-PLYMOUTH IA-WOODBURY IA-IDA IA- 452 AM CDT SUN MAY 6 2007 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 500 AM CDT FOR IDA... WOODBURY...PLYMOUTH AND CHEROKEE COUNTIES... MODERATE RAINS WILL CONTINUE ACROSS THE AREA THROUGH 8 AM WITH ADDITIONAL ACCUMLATIONS AROUND ONE INCH. WIDESPREAD FLASH FLOODING IS NOT EXPECTED...HOWEVER...AREAS OF URBAN AND SMALL STREAM FLOODING IS EXPECTED AND A FLOOD WARNING REMAINS IN EFFECT UNTIUL 830 AM. LAT...LON 4225 9630 4225 9540 4290 9541 4291 9654 $$ CJ
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 8:11 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 64 min |
| May 5, 10:10 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 35 min |
| May 5, 10:29 PM CDT | Severe Thunderstorm Warning | FSD | O'Brien | 31 min |
| May 5, 10:46 PM CDT | High Wind Warning | FSD | Dickinson, Lyon, O'Brien, Osceola, Sioux | 8 hr |
| May 6, 12:22 AM CDT | Flash Flood Warning | FSD | Buena Vista, Clay, O'Brien | 6 hr |
Nearby
Flash Flood Warnings in Iowa, 2007Every flash flood warning in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.