Alert archive / Iowa / Flash Flood Warnings in 2016
Flash Flood Warning 4, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at May 23, 2016, 5:58 PM CDT for Plymouth County, Sioux County, Iowa; Union 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
- May 23, 2016, 5:58 PM CDT (22:58 UTC)
- Expired
- May 23, 2016, 9:30 PM CDT
- In force
- 4 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Flood severity
- None
Counties Plymouth County, IA, Sioux County, IA, Union County, SD
The radar
The Sioux Falls radar (KFSD), 85 km from the middle of the area, began a volume at 23:00 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, 11.0 hours before the alert went out and 176 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
- 426 J/kg
- Mixed-layer CIN
- -163 J/kg
- Mixed-layer LCL
- 780 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 184 m²/s²
- 0-3 km storm-relative helicity
- 219 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
324 WGUS53 KFSD 232258 FFWFSD IAC149-167-SDC127-240230- /O.NEW.KFSD.FF.W.0004.160523T2258Z-160524T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 558 PM CDT MON MAY 23 2016 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTH CENTRAL SIOUX COUNTY IN NORTHWESTERN IOWA... WESTERN PLYMOUTH COUNTY IN NORTHWESTERN IOWA... CENTRAL UNION COUNTY IN SOUTHEASTERN SOUTH DAKOTA... * UNTIL 930 PM CDT * AT 557 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. 1 TO 3 INCHES OF RAIN IN LESS THAN 2 HOURS MAY BE POSSIBLE. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... SIOUX CENTER...IRETON...MAURICE AND CRAIG. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. && LAT...LON 4306 9603 4263 9648 4267 9666 4309 9619 $$ DUX
2 follow-up statements
329 WGUS73 KFSD 232352 FFSFSD FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 652 PM CDT MON MAY 23 2016 IAC149-167-SDC127-240230- /O.CON.KFSD.FF.W.0004.000000T0000Z-160524T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SIOUX IA-PLYMOUTH IA-UNION SD- 652 PM CDT MON MAY 23 2016 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR SOUTH CENTRAL SIOUX...WESTERN PLYMOUTH AND CENTRAL UNION COUNTIES... AT 651 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. RADAR ESTIMATED UPWARDS TO 2 TO 4 INCHES OF RAIN HAVE FALLEN SINCE 5 PM. SCATTERED THUNDERSTORMS MAY CONTINUE THROUGH 8 PM BEFORE ENDING. FLASH FLOODING IS LIKELY OCCURRING DUE TO THIS HEAVY RAINFALL. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... SIOUX CENTER...IRETON...MAURICE AND CRAIG. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. && LAT...LON 4306 9603 4263 9648 4267 9666 4309 9619 $$ DUX
517 WGUS73 KFSD 240224 FFSFSD FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 924 PM CDT MON MAY 23 2016 IAC149-167-SDC127-240233- /O.EXP.KFSD.FF.W.0004.000000T0000Z-160524T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SIOUX IA-PLYMOUTH IA-UNION SD- 924 PM CDT MON MAY 23 2016 ...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL SIOUX...WESTERN PLYMOUTH AND CENTRAL UNION COUNTIES WILL EXPIRE AT 930 PM CDT... THE HEAVY RAIN HAS ENDED AND FLOOD WATERS CONTINUE TO RECEDE. WHILE FLASH FLOODING WILL NOT CONTINUE OVERNIGHT...PONDING OF WATER MAY CONTINUE INTO TUESDAY MORNING AND RISES WILL OCCUR IN AREA STREAMS AND CREEKS. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES. LAT...LON 4306 9603 4263 9648 4267 9666 4309 9619 $$ DUX
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 4:27 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Woodbury | 33 min |
| May 23, 5:22 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 23 min |
| May 23, 5:25 PM CDT | Flash Flood Warning | FSD | O'Brien, Plymouth, Sioux | 4 hr |
| May 23, 5:29 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, O'Brien, Osceola, Sioux | 46 min |
| May 23, 5:39 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 36 min |
| May 23, 6:06 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Osceola | 39 min |
| May 23, 6:09 PM CDT | Flash Flood Warning | FSD | Osceola | 4 hr |
| May 23, 6:23 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Plymouth | 37 min |
| May 23, 6:49 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Clay, O'Brien | 23 min |
| May 22, 8:34 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 41 min |
| May 22, 9:13 PM CDT | Severe Thunderstorm Warning | FSD | Brule, Charles Mix, Gregory | 47 min |
| May 22, 9:51 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Brule, Charles Mix, Douglas | 39 min |
| May 22, 10:06 PM CDT | Severe Thunderstorm Warning | FSD | Gregory | 39 min |
| May 22, 10:23 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Brule, Davison, Douglas, Jerauld, Sanborn | 52 min |
| May 22, 10:45 PM CDT | Flash Flood Warning | FSD | Aurora, Brule, Charles Mix, Gregory | 6 hr |
Nearby
Flash Flood Warnings in Iowa, 2016Flash Flood Warnings in South Dakota, 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.