Alert archive / Iowa / Flash Flood Warnings in 2016
Flash Flood Warning 33, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Sep 15, 2016, 5:53 PM CDT for 4 counties in Iowa. 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
- Sep 15, 2016, 5:53 PM CDT (22:53 UTC)
- Expired
- Sep 15, 2016, 9:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Flood severity
- None
Counties Buena Vista County, IA, Cherokee County, IA, Clay County, IA, O'Brien County, IA
The radar
The Sioux Falls radar (KFSD), 136 km from the middle of the area, began a volume at 22:53 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
Omaha, NE (KOAX), launched 12:00Z, 10.9 hours before the alert went out and 179 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
- 696 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 648 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted.
298 WGUS53 KFSD 152253 FFWFSD IAC021-035-041-141-160200- /O.NEW.KFSD.FF.W.0033.160915T2253Z-160916T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 553 PM CDT THU SEP 15 2016 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHERN O'BRIEN COUNTY IN NORTHWESTERN IOWA... CHEROKEE COUNTY IN NORTHWESTERN IOWA... CLAY COUNTY IN NORTHWESTERN IOWA... BUENA VISTA COUNTY IN NORTHWESTERN IOWA... * UNTIL 900 PM CDT * AT 552 PM CDT...DOPPLER RADAR INDICATED SCATTERED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN THE WARNED AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU CAN DO SO SAFELY. && LAT...LON 4256 9585 4311 9585 4312 9491 4256 9491 $$ GILLISPIE
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 11:34 AM CDT | Flash Flood Warning | FSD | Lyon | 3 hr |
| Sep 15, 1:40 PM CDT | Flash Flood Warning | FSD | Lyon, Osceola, Sioux | 3 hr |
| Sep 15, 2:11 PM CDT | Flash Flood Warning | FSD | Lyon | 3 hr |
| Sep 15, 4:07 PM CDT | Flash Flood Warning | FSD | Clay, Dickinson, O'Brien, Osceola, Sioux | 3 hr |
| Sep 15, 4:37 PM CDT | Flash Flood Warning | FSD | Lyon, Osceola, Sioux | 3 hr |
Nearby
Flash Flood Warnings in Iowa, 2016Every flash flood warning in 2016
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.