Alert archive / Iowa / Flash Flood Warnings in 2012
Flash Flood Warning 11, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at May 19, 2012, 10:11 PM CDT for Clay County, Dickinson County, O'Brien County, Iowa; Jackson County, Minnesota. It was in force for 3 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
- May 19, 2012, 10:11 PM CDT (03:11 UTC)
- Expired
- May 20, 2012, 1:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Flood severity
- None
Counties Clay County, IA, Dickinson County, IA, O'Brien County, IA, Jackson County, MN
The radar
The Sioux Falls radar (KFSD), 132 km from the middle of the area, began a volume at 03:11 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
Minneapolis, MN (KMPX), launched 00:00Z, 3.2 hours before the alert went out and 208 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
- 1062 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 2089 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 139 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.6
The text
As transmitted, in the capitals the NWS used until 2016.
334 WGUS53 KFSD 200311 FFWFSD IAC041-059-141-MNC063-200600- /O.NEW.KFSD.FF.W.0011.120520T0311Z-120520T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 1011 PM CDT SAT MAY 19 2012 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * FLASH FLOOD WARNING FOR... DICKINSON COUNTY IN NORTHWEST IOWA NORTHEASTERN O'BRIEN COUNTY IN NORTHWEST IOWA NORTHERN CLAY COUNTY IN NORTHWEST IOWA SOUTHEASTERN JACKSON COUNTY IN SOUTHWEST MINNESOTA * UNTIL 100 AM CDT * AT 1002 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR ESTIMATES 2 TO 4 INCHES OF RAINFALL HAS FALLEN OVER MUCH OF THE AREA...WITH LOCALIZED HIGHER AMOUNTS POSSIBLE. ADDITIONAL RAINFALL OF 1 TO 2 INCHES IS POSSIBLE BEFORE THE HEAVIEST RAIN LIFTS NORTH OF THE AREA AROUND 11 PM. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... JACKSON...SPENCER...SPIRIT LAKE...ARNOLDS PARK...EVERLY... FOSTORIA...LAKE PARK...LAKEFIELD...MILFORD...OKOBOJI...ORLEANS... WAHPETON AND WEST OKOBOJI. 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 4308 9504 4310 9545 4372 9524 4372 9488 $$ JH
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 7:56 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Ida, Plymouth, Woodbury | 38 min |
| May 19, 9:09 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Ida, Plymouth, Woodbury | 51 min |
| May 19, 9:38 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Clay, O'Brien, Plymouth | 37 min |
Nearby
Flash Flood Warnings in Iowa, 2012Flash Flood Warnings in Minnesota, 2012Every flash flood warning in 2012
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.