Alert archive / South Dakota / Flash Flood Warnings in 2011
Flash Flood Warning 15, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Jun 26, 2011, 6:55 PM CDT for 4 counties in South Dakota; Dixon County, Nebraska. It was in force for 3 hr. 1 report 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, 6:55 PM CDT (23:55 UTC)
- Expired
- Jun 26, 2011, 10:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Flood severity
- None
Counties Dixon County, NE, Clay County, SD, Lincoln County, SD, Turner County, SD, Union County, SD
The radar
The Sioux Falls radar (KFSD), 87 km from the middle of the area, began a volume at 23:56 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, 7:30 PM CDT | FLASH FLOOD | 6 N Vermillion, SD | WATER RUNNING OVER UNIVERSITY ROAD |
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 12:00Z, 11.9 hours before the alert went out and 177 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
- 859 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
493
WGUS53 KFSD 262355
FFWFSD
NEC051-SDC027-083-125-127-270300-
/O.NEW.KFSD.FF.W.0015.110626T2355Z-110627T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
655 PM CDT SUN JUN 26 2011
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CLAY COUNTY IN SOUTHEAST SOUTH DAKOTA
NORTHWESTERN DIXON COUNTY IN NORTHEAST NEBRASKA
NORTHWESTERN UNION COUNTY IN SOUTHEAST SOUTH DAKOTA
SOUTHEASTERN TURNER COUNTY IN SOUTHEAST SOUTH DAKOTA
SOUTHWESTERN LINCOLN COUNTY IN SOUTHEAST SOUTH DAKOTA
* UNTIL 1000 PM CDT
* AT 651 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 OCCURRED IN PORTIONS
OF CLAY COUNTY. ADDITIONAL RAINFALL OF UP TO ONE INCH MAY OCCUR IN
SOUTHERN CLAY COUNTY...WITH AROUND 2 INCHES OF RAINFALL POSSIBLE
AS THE STORMS MOVE INTO NORTHERN CLAY COUNTY...SOUTHERN TURNER
COUNTY...AND SOUTHWESTERN LINCOLN COUNTY. MUCH OF THIS RAIN WILL
OCCUR IN LESS THAN AN HOUR.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
BERESFORD...VERMILLION...CENTERVILLE...MECKLING...VIBORG AND
WAKONDA. CLAY CREEK IN CLAY COUNTY MAY ALSO EXPERIENCE FLASH
FLOODING.
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 4270 9703 4275 9703 4277 9705 4276 9712
4280 9717 4283 9715 4320 9713 4317 9672
4267 9681
$$
SCHUMACHER2 follow-up statements
602
WGUS73 KFSD 270144
FFSFSD
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
844 PM CDT SUN JUN 26 2011
NEC051-SDC083-125-270155-
/O.CAN.KFSD.FF.W.0015.000000T0000Z-110627T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DIXON NE-LINCOLN SD-TURNER SD-
844 PM CDT SUN JUN 26 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHEASTERN
TURNER...SOUTHWESTERN LINCOLN AND NORTHWESTERN DIXON COUNTIES IS
CANCELLED...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.
LAT...LON 4272 9682 4278 9697 4275 9703 4277 9705
4276 9712 4280 9717 4283 9715 4304 9714
4304 9674 4295 9676
$$
SDC027-127-270300-
/O.CON.KFSD.FF.W.0015.000000T0000Z-110627T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLAY SD-UNION SD-
844 PM CDT SUN JUN 26 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR WESTERN UNION AND CLAY
COUNTIES UNTIL 1000 PM CDT...
AT 837 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL HAVE ENDED ACROSS THE WARNED
AREA. HOWEVER...RADAR ESTIMATES OF RAINFALL OF 1 TO 3 INCHES HAD
OCCURRED ACROSS THE AREA THIS EVENING. THIS WILL STILL CAUSE
EXCESSIVE RUNOFF THAT MAY CAUSE RAPID RISES TO SMALL
CREEKS...ESPECIALLY NORTH OF VERMILLION.
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 AREAS NEAR BAPTIST CREEK AND SMALL CREEKS NEAR THE
VERMILLION RIVER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE
BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE ALSO SUBJECT
TO FLOODING.
&&
LAT...LON 4272 9682 4278 9697 4275 9703 4277 9705
4276 9712 4280 9717 4283 9715 4304 9714
4304 9674 4295 9676
$$
SCHUMACHER751
WGUS73 KFSD 270252
FFSFSD
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
952 PM CDT SUN JUN 26 2011
SDC027-127-270307-
/O.EXP.KFSD.FF.W.0015.000000T0000Z-110627T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLAY SD-UNION SD-
952 PM CDT SUN JUN 26 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR WESTERN UNION AND
CLAY COUNTIES WILL BE ALLOWED TO EXPIRE AT 1000 PM CDT...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA WERE BEGINNING TO RECEDE...ENDING
THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT
TO YOUR LOCAL LAW ENFORCEMENT AGENCY.
AT 929 PM CDT...A TRAINED WEATHER SPOTTER REPORTED THAT WATER WAS
OVER THE ROAD WHERE THE VERMILLION RIVER CROSSES UNIVERSITY ROAD 5
MILES SOUTH OF HUB CITY.
LAT...LON 4272 9682 4278 9697 4275 9703 4277 9705
4276 9712 4280 9717 4283 9715 4304 9714
4304 9674 4295 9676
$$
SCHUMACHERThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 6:55 PM CDT | Severe Thunderstorm Warning | FSD | Dakota, Dixon | 35 min |
Nearby
Flash Flood Warnings in South Dakota, 2011Flash Flood Warnings in Nebraska, 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.