Alert archive / Iowa / Flash Flood Warnings in 2011
Flash Flood Warning 17, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Jun 26, 2011, 7:56 PM CDT for 4 counties in Iowa. It was in force for 3 hr. 8 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 26, 2011, 7:56 PM CDT (00:56 UTC)
- Expired
- Jun 26, 2011, 11:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cherokee County, IA, O'Brien County, IA, Plymouth County, IA, Sioux County, IA
The radar
The Sioux Falls radar (KFSD), 105 km from the middle of the area, began a volume at 00:55 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 |
|---|---|---|---|
| Jun 26, 8:30 PM CDT | FLASH FLOOD | Le Mars, IA | QUITE A BIT OF STREET FLOODING IN TOWN. |
| Jun 26, 9:15 PM CDT | FLASH FLOOD | Marcus, IA | WATER OVER MANY GRAVEL ROADS AROUND MARCUS. |
| Jun 26, 9:37 PM CDT | FLASH FLOOD | Marcus, IA | CULVERT WASHED OUT ALONG IOWA HIGHWAY 3 BETWEEN MARCUS AND REMSEN. |
| Jun 26, 9:37 PM CDT | HEAVY RAIN 0 | 4 S Paullina, IA | 4.5 INCHES OF RAIN IN AN HOUR |
| Jun 26, 10:10 PM CDT | FLASH FLOOD | 2 S Marcus, IA | PICK UP WASHED OFF ROAD DUE TO FLOODING ALONG C AVENUE SOUTH OF MARCUS. NO INJUERIES WERE REPORTED. |
| Jun 26, 10:10 PM CDT | FLASH FLOOD | Marcus, IA | SIX INCHES OF WATER OVER MANY AREA COUNTY ROADS. |
| Jun 26, 10:15 PM CDT | FLASH FLOOD | Remsen, IA | CONSIDERABLE AMOUNT OF FLOODING TAKING PLACE IN TOWN. |
| Jun 26, 10:24 PM CDT | HEAVY RAIN 0 | Le Mars, IA | 3.05 INCHES OF RAIN. |
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, 0.9 hours before the alert went out and 183 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
- 2873 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 501 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 248 m²/s²
- 0-3 km storm-relative helicity
- 308 m²/s²
- Significant tornado parameter
- 6.2
- Supercell composite
- 26.5
The text
As transmitted, in the capitals the NWS used until 2016.
642 WGUS53 KFSD 270056 FFWFSD IAC035-141-149-167-270400- /O.NEW.KFSD.FF.W.0017.110627T0056Z-110627T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 756 PM CDT SUN JUN 26 2011 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN PLYMOUTH COUNTY IN NORTHWEST IOWA NORTHWESTERN CHEROKEE COUNTY IN NORTHWEST IOWA SOUTHEASTERN SIOUX COUNTY IN NORTHWEST IOWA SOUTHWESTERN O'BRIEN COUNTY IN NORTHWEST IOWA * UNTIL 1100 PM CDT * AT 751 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR ESTIMATES OF 1 TO 2 INCHES OF RAIN HAVE FALLEN SO FAR OVER NORTHEASTERN PLYMOUTH AND NORTHWESTERN CHEROKEE COUNTY. ADDITIONAL RAINFALL OF 1 TO 2 INCHES IS EXPECTED WITH THESE STORMS WITH THE HEAVIEST RAINFALL EXPECTED NEAR THE INTERSECTION OF PLYMOUTH...SIOUX...O'BRIEN...AND CHEROKEE COUNTIES. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...LE MARS...ORANGE CITY...ALTON...CLEGHORN...GRANVILLE...MARCUS... PAULLINA AND REMSEN. FLASH FLOODING MAY ALSO OCCUR ALONG WHISKEY CREEK AND DEEP CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 4300 9560 4279 9563 4279 9619 4300 9610 $$ SCHUMACHER
2 follow-up statements
757 WGUS73 KFSD 270226 FFSFSD FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 926 PM CDT SUN JUN 26 2011 IAC035-141-149-167-270400- /O.CON.KFSD.FF.W.0017.000000T0000Z-110627T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SIOUX IA-PLYMOUTH IA-O'BRIEN IA-CHEROKEE IA- 926 PM CDT SUN JUN 26 2011 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHWESTERN CHEROKEE... SOUTHWESTERN O'BRIEN...NORTHEASTERN PLYMOUTH AND SOUTHEASTERN SIOUX COUNTIES UNTIL 1100 PM CDT... AT 914 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS CONTINUE ACROSS THE AREA. WHILE THE HEAVIEST RAINFALL HAS MOVED TO THE EAST...MODERATE RAINFALL CONTINUES TO FALL ACROSS THE AREA. THIS RAINFALL IS EXPECTED TO PRODUCE ANOTHER HALF INCH OF RAIN. THIS ADDITIONAL RAINFALL WILL BE ADDED TO THE 2 TO 4 INCHES THAT HAS ALREADY FALLEN. THIS WILL PRODUCE ADDITIONAL FLASH FLOODING ACROSS THE AREA. AT 915 PM CDT...THE CHEROKEE COUNTY EMERGENCY MANAGER REPORTS THERE IS WATER OVER ROADS NEAR MARCUS. SLOW MOVING THUNDERSTORMS ARE PRODUCING VERY HEAVY RAINFALL IN THE WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...ALTON...CLEGHORN...GRANVILLE...MARCUS...PAULLINA AND REMSEN. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE ALSO SUBJECT TO FLOODING. && LAT...LON 4300 9560 4279 9563 4279 9619 4300 9610 $$ SCHUMACHER
328 WGUS73 KFSD 270359 FFSFSD FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1059 PM CDT SUN JUN 26 2011 IAC035-141-149-167-270412- /O.EXP.KFSD.FF.W.0017.000000T0000Z-110627T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SIOUX IA-PLYMOUTH IA-O'BRIEN IA-CHEROKEE IA- 1059 PM CDT SUN JUN 26 2011 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHWESTERN CHEROKEE...SOUTHWESTERN O'BRIEN...NORTHEASTERN PLYMOUTH AND SOUTHEASTERN SIOUX COUNTIES WILL BE ALLOWED TO EXPIRE AT 1100 PM CDT... ...A FLOOD WARNING IS IN EFFECT UNTIL 1100 AM CDT MONDAY... HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS AND CREEKS IN THE WARNED AREA ARE BEGINNING TO SLOWLY RECEDE...BUT FLOODING OF ROADS REMAINS...ESPEICALLY IN RURAL AREAS. IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY. LAT...LON 4300 9560 4279 9563 4279 9619 4300 9610 $$ SCHUMACHER
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 7:27 PM CDT | Flash Flood Warning | FSD | Woodbury | 3 hr |
| Jun 26, 7:29 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 31 min |
| Jun 26, 7:37 PM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 38 min |
| Jun 26, 7:59 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 31 min |
| Jun 26, 8:14 PM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 31 min |
| Jun 26, 8:17 PM CDT | Flash Flood Warning | FSD | Plymouth | 3 hr |
| Jun 26, 8:21 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Woodbury | 24 min |
| Jun 26, 8:32 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 28 min |
| Jun 26, 8:41 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Woodbury | 34 min |
| Jun 26, 8:44 PM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 31 min |
| Jun 26, 8:52 PM CDT | Flash Flood Warning | FSD | Cherokee | 2 hr |
| Jun 26, 8:56 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista | 34 min |
| Jun 26, 8:58 PM CDT | High Wind Warning | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 4 hr |
| Jun 26, 8:59 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 31 min |
| Jun 26, 9:02 PM CDT | Flash Flood Warning | FSD | Buena Vista, Clay | 3 hr |
| Jun 26, 9:29 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista | 31 min |
| Jun 26, 10:54 PM CDT | Areal Flood Warning | FSD | Cherokee, O'Brien, Plymouth, Sioux | 36 hr |
| Jun 27, 3:16 PM CDT | River Flood Warning | FSD | Woodbury | 42 hr |
Nearby
Flash Flood Warnings in Iowa, 2011Every flash flood warning in 2011
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.