Alert archive / Iowa / Flash Flood Warnings in 2005
Flash Flood Warning 2, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Apr 6, 2005, 7:43 AM CDT for Clay County, Iowa. It was in force for 92 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
- Apr 6, 2005, 7:43 AM CDT (12:43 UTC)
- Expired
- Apr 6, 2005, 9:15 AM CDT
- In force
- 92 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
County Clay County, IA
The radar
The Sioux Falls radar (KFSD), 142 km from the middle of the area, began a volume at 12:46 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 12:00Z, 0.7 hours before the alert went out and 224 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 921 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KFSD 061245 FFWFSD IAC041-061415- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 743 AM CDT WED APR 6 2005 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * FLASH FLOOD WARNING FOR... CLAY COUNTY IN NORTHWEST IOWA * UNTIL 915 AM CDT * AT 743 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM THUNDERSTORMS ALONG A LINE EXTENDING FROM 5 MILES NORTH OF SPENCER TO 9 MILES SOUTH OF ROYAL. THE STORMS PRODUCING FLASH FLOODING WERE NEARLY STATIONARY. FLOODING OF STONEY CREEK IS LIKELY IN CLAY 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 4321 9495 4322 9524 4293 9539 4293 9501 $$ CPJ
3 follow-up statements
000 WGUS73 KFSD 061306 FFSFSD FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 804 AM CDT WED APR 6 2005 IAC041-061415- CLAY IA- 804 AM CDT WED APR 6 2005 ...A FLASH FLOOD WARNING CONTINUES UNTIL 915 AM CDT FOR CLAY COUNTY... AT 800 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS PRODUCING FLASH FLOODING OVER THE WARNED AREA. THE HEAVIEST RAINS WERE OCCURRING ALONG AND WEST OF A LINE...FROM FOSTORIA...TO SPENCER TO GREENVILLE. FLOODING OF STONY CREEK IS LIKELY. 2.80 INCHES OF RAIN HAS FALLEN IN SPENCER SINCE 645 AM CDT. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. LAT...LON 4324 9495 4325 9525 4293 9534 4293 9501 $$ CPJ
000 WGUS73 KFSD 061324 FFSFSD FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 822 AM CDT WED APR 6 2005 IAC041-061415- CLAY IA- 822 AM CDT WED APR 6 2005 ...A FLASH FLOOD WARNING CONTINUES UNTIL 915 AM CDT FOR CLAY COUNTY... AT 821 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS PRODUCING FLASH FLOODING OVER THE WARNED AREA. THE HEAVIEST RAINS WERE OCCURRING ALONG AND WEST OF A LINE...FROM FOSTORIA TO WEBB. SINCE 645 AM CDT...3.23 INCHES OF RAIN HAS FALLEN IN SPENCER. LATEST RADAR INDICATIONS SHOW THAT THE PRECIPITATION WAS BEGINNING TO WEAKEN. HOWEVER...SINCE HEAVY RAINS HAVE FALLEN IN THE LAST HOUR...FLASH FLOODING IS STILL LIKELY...ESPECIALLY NEAR RIVERS AND CREEKS. 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 4324 9495 4325 9525 4293 9521 4293 9494 $$ CPJ
000 WGUS73 KFSD 061413 FFSFSD FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 911 AM CDT WED APR 6 2005 IAC041-061421- CLAY IA- 911 AM CDT WED APR 6 2005 ...THE FLASH FLOOD WARNING FOR CLAY COUNTY EXPIRES AT 915 AM CDT... AT 910 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE INTENSITY OF RAIN ACROSS CLAY COUNTY WAS WEAKENING. THE THREAT OF FLASH FLOODING HAS DIMINISHED...THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. TOTAL RAINFALL SINCE 645 AM CDT AT THE SPENCER AIRPORT HAS BEEN 3.65 INCHES. LAT...LON 4324 9495 4325 9525 4293 9521 4293 9494 $$ CPJ
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 6, 4:36 AM CDT | Severe Thunderstorm Warning | FSD | Lyon | 24 min |
| Apr 6, 5:17 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 28 min |
Nearby
Flash Flood Warnings in Iowa, 2005Every flash flood warning in 2005
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.