Alert archive / South Dakota / Flash Flood Warnings in 2011
Flash Flood Warning 28, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Jul 26, 2011, 3:17 AM CDT for Beadle County, Kingsbury County, South Dakota. It was in force for 4 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 26, 2011, 3:17 AM CDT (08:17 UTC)
- Expired
- Jul 26, 2011, 7:09 AM CDT
- In force
- 4 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Flood severity
- None
Counties Beadle County, SD, Kingsbury County, SD
The radar
The Sioux Falls radar (KFSD), 124 km from the middle of the area, began a volume at 08:19 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
Aberdeen, SD (KABR), launched 00:00Z, 8.3 hours before the alert went out and 73 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
- 2164 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- -41 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
048 WGUS53 KFSD 260817 FFWFSD SDC005-077-261230- /O.NEW.KFSD.FF.W.0028.110726T0817Z-110726T1230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 317 AM CDT TUE JUL 26 2011 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * FLASH FLOOD WARNING FOR... EASTERN BEADLE COUNTY IN EAST CENTRAL SOUTH DAKOTA WESTERN KINGSBURY COUNTY IN EAST CENTRAL SOUTH DAKOTA * UNTIL 730 AM CDT * AT 310 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL SET TO RETURN ACROSS THE WARNED AREA. THIS AREA HAS ALREADY RECEIVED A RADAR ESTIMATED 3 TO 4 INCHES RAINFALL FROM EARLIER THUNDERSTORMS. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... IROQUOIS...AND SPECIFICALLY AREAS NEAR AND NORTH OF IROQUOIS ON THE MIDDLE AND SOUTH FORKS OF PEARL CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. && LAT...LON 4446 9772 4432 9769 4433 9792 4445 9790 $$
2 follow-up statements
481 WGUS73 KFSD 261017 FFSFSD FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 517 AM CDT TUE JUL 26 2011 SDC005-077-261230- /O.CON.KFSD.FF.W.0028.000000T0000Z-110726T1230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ KINGSBURY SD-BEADLE SD- 517 AM CDT TUE JUL 26 2011 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EASTERN BEADLE AND WESTERN KINGSBURY COUNTIES UNTIL 730 AM CDT... AT 515 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED ESTIMATED RAINFALL TOTALS FROM 3 TO 5 INCHES OCCURRED IN A SMALL AREA MAINLY NEAR AND NORTH OF IROQUOIS. WHILE THE THREAT OF ADDITIONAL HEAVY RAINFALL HAS GENERALLY ENDED THIS MORNING...THE RUNOFF FROM EARLIER HEAVY RAINFALL WILL CONTINUE TO IMPACT MAINLY THE SOUTH AND MIDDLE FORKS OF PEARL CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. && LAT...LON 4446 9772 4432 9769 4433 9792 4445 9790 $$ CHAPMAN
513 WGUS73 KFSD 261209 FFSFSD FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 709 AM CDT TUE JUL 26 2011 SDC005-077-261224- /O.CAN.KFSD.FF.W.0028.000000T0000Z-110726T1230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ KINGSBURY SD-BEADLE SD- 709 AM CDT TUE JUL 26 2011 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EASTERN BEADLE AND WESTERN KINGSBURY COUNTIES IS CANCELLED... EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED... PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY. LAT...LON 4446 9772 4432 9769 4433 9792 4445 9790 $$ CHAPMAN
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 7:24 PM CDT | Severe Thunderstorm Warning | FSD | Moody | 36 min |
| Jul 25, 7:53 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha, Moody | 37 min |
| Jul 25, 8:23 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha | 37 min |
| Jul 25, 8:53 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha | 37 min |
| Jul 25, 9:04 PM CDT | Severe Thunderstorm Warning | FSD | Moody | 41 min |
| Jul 25, 10:29 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Turner | 31 min |
| Jul 25, 10:54 PM CDT | Severe Thunderstorm Warning | FSD | Turner | 36 min |
Nearby
Flash Flood Warnings in South Dakota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.