Alert archive / Iowa / Flash Flood Warnings in 2016
Flash Flood Warning 3, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at May 23, 2016, 5:25 PM CDT for O'Brien County, Plymouth County, Sioux County, Iowa. It was in force for 4 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
- May 23, 2016, 5:25 PM CDT (22:25 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 O'Brien County, IA, Plymouth County, IA, Sioux County, IA
The radar
The Sioux Falls radar (KFSD), 98 km from the middle of the area, began a volume at 22:26 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 |
|---|---|---|---|
| May 23, 5:55 PM CDT | FLASH FLOOD | Le Mars, IA | STREETS FLOODED AND OVER RAILROAD TRACKS |
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, 10.4 hours before the alert went out and 168 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.
721
WGUS53 KFSD 232225
FFWFSD
IAC141-149-167-240230-
/O.NEW.KFSD.FF.W.0003.160523T2225Z-160524T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
525 PM CDT MON MAY 23 2016
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN SIOUX COUNTY IN NORTHWESTERN IOWA...
WESTERN O'BRIEN COUNTY IN NORTHWESTERN IOWA...
CENTRAL PLYMOUTH COUNTY IN NORTHWESTERN IOWA...
* UNTIL 930 PM CDT
* AT 525 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO TO THREE INCHES OF
RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN
SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
LE MARS...ORANGE CITY...SHELDON...REMSEN...SANBORN...ALTON...HINTON...
MERRILL...HOSPERS...GRANVILLE...ARCHER...STRUBLE...BRUNSVILLE AND OYENS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
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 4264 9651 4326 9582 4325 9555 4256 9617
4256 9622
$$
DUX3 follow-up statements
568
WGUS73 KFSD 232304
FFSFSD
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
604 PM CDT MON MAY 23 2016
IAC141-149-167-240230-
/O.CON.KFSD.FF.W.0003.000000T0000Z-160524T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SIOUX IA-O'BRIEN IA-PLYMOUTH IA-
604 PM CDT MON MAY 23 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR
SOUTHEASTERN SIOUX...WESTERN O'BRIEN AND CENTRAL PLYMOUTH COUNTIES...
AT 602 PM CDT...TRAINED WEATHER SPOTTERS REPORTED THUNDERSTORMS
PRODUCING HEAVY RAIN AND FLASH FLOODING. AT 555 PM CDT TRAINED
SPOTTERS REPORTED STREETS FLOODED AND WATER OVER THE RAILROAD TRACKS
ON CENTRAL STREET IN THE CITY OF LE MARS. UP TO THREE INCHES OF RAIN
HAVE ALREADY FALLEN.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
LE MARS...ORANGE CITY...SHELDON...REMSEN...SANBORN...ALTON...HINTON...
MERRILL...HOSPERS...GRANVILLE...ARCHER...STRUBLE...BRUNSVILLE AND OYENS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY.
&&
LAT...LON 4264 9651 4326 9582 4325 9555 4256 9617
4256 9622
$$
DUX203
WGUS73 KFSD 232356
FFSFSD
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
656 PM CDT MON MAY 23 2016
IAC141-149-167-240230-
/O.CON.KFSD.FF.W.0003.000000T0000Z-160524T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SIOUX IA-O'BRIEN IA-PLYMOUTH IA-
656 PM CDT MON MAY 23 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR
SOUTHEASTERN SIOUX...WESTERN O'BRIEN AND CENTRAL PLYMOUTH COUNTIES...
AT 654 PM CDT...TRAINED WEATHER SPOTTERS REPORTED THAT THUNDERSTORMS
HAD PRODUCED HEAVY RAIN IN ACROSS THE WARNING AREA. UP TO THREE TO 4
INCHES OF RAIN HAS ALREADY FALLEN. SPOTTERS REPORTED THAT THE CITY
OF LE MARS WAS EXPERIENCING CONSIDERABLE STREET FLOODING. FLASH
FLOODING IS EXPECTED TO CONTINUE THIS EVENING ACROSS THE WARNING
AREA. THUNDERSTORMS WILL COME TO AN END BY 9 PM.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
LE MARS...ORANGE CITY...SHELDON...REMSEN...SANBORN...ALTON...HINTON...
MERRILL...HOSPERS...GRANVILLE...ARCHER...STRUBLE...BRUNSVILLE AND OYENS.
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.
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 4264 9651 4326 9582 4325 9555 4256 9617
4256 9622
$$
DUX487
WGUS73 KFSD 240223
FFSFSD
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
923 PM CDT MON MAY 23 2016
IAC141-149-167-240232-
/O.EXP.KFSD.FF.W.0003.000000T0000Z-160524T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SIOUX IA-O'BRIEN IA-PLYMOUTH IA-
923 PM CDT MON MAY 23 2016
...THE FLASH FLOOD WARNING FOR SOUTHEASTERN SIOUX...WESTERN O'BRIEN
AND CENTRAL PLYMOUTH COUNTIES WILL EXPIRE AT 930 PM CDT...
THE HEAVY RAIN HAS ENDED AND FLOOD WATERS CONTINUE TO RECEDE. WHILE
FLASH FLOODING WILL NOT CONTINUE OVERNIGHT...PONDING OF WATER MAY
CONTINUE INTO TUESDAY MORNING AND RISES WILL OCCUR IN AREA STREAMS
AND CREEKS. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.
LAT...LON 4264 9651 4326 9582 4325 9555 4256 9617
4256 9622
$$
DUXThe 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, 5:29 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, 5:58 PM CDT | Flash Flood Warning | FSD | Plymouth, Sioux | 4 hr |
| 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 |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.