Alert archive / Nebraska / Flash Flood Warnings in 2015
Flash Flood Warning 18, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Sep 23, 2015, 1:45 AM CDT for Dixon County, Nebraska. 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 23, 2015, 1:45 AM CDT (06:45 UTC)
- Expired
- Sep 23, 2015, 4:45 AM CDT
- In force
- 3 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Flood severity
- None
County Dixon County, NE
The radar
The Sioux Falls radar (KFSD), 123 km from the middle of the area, began a volume at 06:47 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 00:00Z, 6.8 hours before the alert went out and 140 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
- 504 J/kg
- Mixed-layer CIN
- -241 J/kg
- Mixed-layer LCL
- 1351 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 370 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
295
WGUS53 KFSD 230645
FFWFSD
NEC051-230945-
/O.NEW.KFSD.FF.W.0018.150923T0645Z-150923T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
145 AM CDT WED SEP 23 2015
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHWESTERN DIXON COUNTY IN NORTHEASTERN NEBRASKA...
* UNTIL 445 AM CDT
* AT 142 AM CDT...DOPPLER RADAR INDICATED A LINE OF SLOW MOVING
THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. RADAR
INDICATES UP TO THREE INCHES OF RAIN HAVE ALREADY FALLEN WITH UP
TO AN ADDITIONAL 2 INCHES OF RAIN POSSIBLE THROUGH THE NEXT FEW
HOURS. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
WAKEFIELD...CONCORD AND DIXON IN DIXON COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
&&
LAT...LON 4266 9701 4264 9686 4226 9686 4227 9702
$$
HANKO2 follow-up statements
278 WGUS73 KFSD 230814 FFSFSD FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 314 AM CDT WED SEP 23 2015 NEC051-230945- /O.CON.KFSD.FF.W.0018.000000T0000Z-150923T0945Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DIXON NE- 314 AM CDT WED SEP 23 2015 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 AM CDT FOR SOUTHWESTERN DIXON COUNTY... AT 312 AM CDT...DOPPLER RADAR CONTINUED TO INDICATED A LINE OF SLOW MOVING THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. RADAR ESTIMATES AS MUCH AS 7 INCHES HAS FALLEN IN PORTIONS OF THE WARNING AREA WITH AN ADDITIONAL 1 TO 2 INCHES POSSIBLE IN THE NEXT HOUR OR SO. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... WAKEFIELD...CONCORD AND DIXON IN DIXON COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU CAN DO SO SAFELY. && LAT...LON 4266 9701 4264 9686 4226 9686 4227 9702 $$ HANKO
135 WGUS73 KFSD 230937 FFSFSD FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 437 AM CDT WED SEP 23 2015 NEC051-230947- /O.EXP.KFSD.FF.W.0018.000000T0000Z-150923T0945Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DIXON NE- 437 AM CDT WED SEP 23 2015 ...THE FLASH FLOOD WARNING FOR SOUTHWESTERN DIXON COUNTY WILL EXPIRE AT 445 AM CDT... THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. LAT...LON 4266 9701 4264 9686 4226 9686 4227 9702 $$ HANKO
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 23, 4:14 AM CDT | Flash Flood Watch | FSD | Dakota, Dixon | 27 hr |
Nearby
Flash Flood Warnings in Nebraska, 2015Every flash flood warning in 2015
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.