Alert archive / Iowa / Flash Flood Warnings in 2011
Flash Flood Warning 27, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Jul 14, 2011, 7:41 AM CDT for Jackson County, Nobles County, Minnesota; 5 counties in Iowa. It was in force for 3 hr. 5 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
- Jul 14, 2011, 7:41 AM CDT (12:41 UTC)
- Expired
- Jul 14, 2011, 10:30 AM CDT
- In force
- 3 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Flood severity
- None
Counties Buena Vista County, IA, Clay County, IA, Dickinson County, IA, O'Brien County, IA, Osceola County, IA, Jackson County, MN, Nobles County, MN
The radar
The Sioux Falls radar (KFSD), 128 km from the middle of the area, began a volume at 12:42 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 |
|---|---|---|---|
| Jul 14, 7:51 AM CDT | FLASH FLOOD | Spirit Lake, IA | STREET FLOODING AVERAGING 6 INCHES DEEP IN PARTS OF TOWN |
| Jul 14, 8:06 AM CDT | HEAVY RAIN 0 | 5 Ne Melvin, IA | 2.70 INCHES OF RAIN IN ABOUT 3 HOURS. SOME PONDING IN FIELDS. |
| Jul 14, 8:21 AM CDT | FLASH FLOOD | Lake Park, IA | SEVERAL STREETS FLOODED IN LAKE PARK |
| Jul 14, 9:05 AM CDT | HEAVY RAIN 0 | Harris, IA | 4 INCHES OF RAIN THIS MORNING |
| Jul 14, 9:05 AM CDT | HEAVY RAIN 4 | Harris, IA | 4 INCHES OF RAIN THIS MORNING |
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, 0.7 hours before the alert went out and 217 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
- 784 J/kg
- Mixed-layer CIN
- -179 J/kg
- Mixed-layer LCL
- 547 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 147 m²/s²
- 0-3 km storm-relative helicity
- 199 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
444
WGUS53 KFSD 141241
FFWFSD
IAC021-041-059-141-143-MNC063-105-141530-
/O.NEW.KFSD.FF.W.0027.110714T1241Z-110714T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
741 AM CDT THU JUL 14 2011
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CLAY COUNTY IN NORTHWEST IOWA
DICKINSON COUNTY IN NORTHWEST IOWA
EASTERN O'BRIEN COUNTY IN NORTHWEST IOWA
EASTERN OSCEOLA COUNTY IN NORTHWEST IOWA
NORTHERN BUENA VISTA COUNTY IN NORTHWEST IOWA
SOUTHEASTERN NOBLES COUNTY IN SOUTHWEST MINNESOTA
SOUTHERN JACKSON COUNTY IN SOUTHWEST MINNESOTA
* UNTIL 1030 AM CDT
* AT 733 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.
AREAS OF ONE TO TWO INCHES OF RAIN CAN BE EXPECTED WITH THESE
STORMS. DICKINSON COUNTY IOWA EMERGENCY MANAGEMENT REPORTS SOME
STREET FLOODING ALREADY OCCURRING IN SPIRIT LAKE.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR...MAINLY STREET FLOODING IN URBAN AREAS. SOME LOCATIONS THAT
COULD EXPERIENCE FLOODING INCLUDE...JACKSON...SPENCER...SPIRIT
LAKE...WORTHINGTON...ARNOLDS PARK...MILFORD...OCHEYEDAN...AND
OKOBOJI.
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.
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 4282 9494 4283 9538 4291 9539 4291 9541
4309 9546 4324 9559 4366 9565 4367 9489
$$
GILLISPIE2 follow-up statements
540
WGUS73 KFSD 141341
FFSFSD
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
841 AM CDT THU JUL 14 2011
IAC021-041-059-141-143-MNC063-105-141530-
/O.CON.KFSD.FF.W.0027.000000T0000Z-110714T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OSCEOLA IA-O'BRIEN IA-DICKINSON IA-BUENA VISTA IA-CLAY IA-JACKSON MN-
NOBLES MN-
841 AM CDT THU JUL 14 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHEASTERN NOBLES...
SOUTHERN JACKSON...CLAY...NORTHERN BUENA VISTA...DICKINSON...EASTERN
O'BRIEN AND EASTERN OSCEOLA COUNTIES UNTIL 1030 AM CDT...
AT 837 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.
DOPPLER RADAR ESTIMATED THAT 1 TO 3 INCHES OF RAIN HAS FALLEN SINCE
600 AM...AND AN ADDITIONAL INCH OF RAIN IS POSSIBLE THROUGH 1000 AM.
SLOW MOVING THUNDERSTORMS ARE PRODUCING VERY HEAVY RAINFALL IN THE
WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH
FLOODING TO OCCUR. STREET FLOODING HAS BEEN REPORTED IN SPIRIT LAKE
AND LAKE PARK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS
AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING
AREAS ARE ALSO SUBJECT TO FLOODING.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 4282 9494 4283 9538 4291 9539 4291 9541
4309 9546 4324 9559 4366 9565 4367 9489
$$
GILLISPIE873
WGUS73 KFSD 141524
FFSFSD
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1024 AM CDT THU JUL 14 2011
IAC021-041-059-141-143-MNC063-105-141540-
/O.EXP.KFSD.FF.W.0027.000000T0000Z-110714T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OSCEOLA IA-O'BRIEN IA-DICKINSON IA-BUENA VISTA IA-CLAY IA-JACKSON MN-
NOBLES MN-
1024 AM CDT THU JUL 14 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHEASTERN
NOBLES...SOUTHERN JACKSON...CLAY...NORTHERN BUENA VISTA...
DICKINSON...EASTERN O'BRIEN AND EASTERN OSCEOLA COUNTIES WILL BE
ALLOWED TO EXPIRE AT 1030 AM CDT...
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 4282 9494 4283 9538 4291 9539 4291 9541
4309 9546 4324 9559 4366 9565 4367 9489
$$
GILLISPIEThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 5:35 AM CDT | Flash Flood Warning | FSD | Pipestone, Rock | 115 min |
| Jul 14, 8:16 AM CDT | River Flood Warning | FSD | Jackson | 8 days |
| Jul 14, 9:28 AM CDT | River Flood Warning | FSD | Rock | 5 days |
| Jul 14, 9:42 AM CDT | River Flood Warning | FSD | Pipestone | 12 hr |
| Jul 14, 8:16 AM CDT | River Flood Warning | FSD | Lyon | 4 hr |
| Jul 14, 8:16 AM CDT | River Flood Warning | FSD | Lyon | 4 days |
| Jul 14, 8:16 AM CDT | River Flood Warning | FSD | Clay | 6 days |
| Jul 14, 11:06 AM CDT | River Flood Warning | FSD | Cherokee | 11 days |
| Jul 14, 3:31 PM CDT | Excessive Heat Watch | FSD | Buena Vista, Cherokee, Ida, Plymouth, Woodbury | 12 hr |
Nearby
Flash Flood Warnings in Iowa, 2011Flash Flood Warnings in Minnesota, 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.