Alert archive / Nebraska / Flash Flood Warnings in 2015

Flash Flood Warning 6, NWS North Platte, NE

August 7, 2015Chase County, Hayes County, Nebraska

NWS North Platte, NE issued this flash flood warning at Aug 7, 2015, 8:55 PM MDT for Chase County, Hayes County, Nebraska. It was in force for 5 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: Aug 7, 2015, 8:55 PM MDT (02:55 UTC)
Expired: Aug 8, 2015, 1:45 AM MDT
In force: 5 hr
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Flood severity: None

Counties Chase County, NE, Hayes County, NE

The radar

The Goodland radar (KGLD), 121 km from the middle of the area, began a volume at 02:55 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.9 hours before the alert went out and 99 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1367 J/kg
Mixed-layer CIN: -135 J/kg
Mixed-layer LCL: 1744 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS53 KLBF 080255
FFWLBF
NEC029-085-080745-
/O.NEW.KLBF.FF.W.0006.150808T0255Z-150808T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
955 PM CDT FRI AUG 7 2015

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN CHASE COUNTY IN SOUTHWESTERN NEBRASKA...
  SOUTHWESTERN HAYES COUNTY IN SOUTHWESTERN NEBRASKA...

* UNTIL 245 AM CDT/145 AM MDT/
    
* AT 951 PM CDT /851 PM MDT/...DOPPLER RADAR INDICATED A THUNDERSTORM
  PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. UP TO THREE INCHES OF
  RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN
  SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... 
  WAUNETA...HAMLET...AND ALONG THE FRENCHMAN AND STINKING WATER 
  CREEKS BOTH ABOVE AND BELOW ENDERS RESERVOIR.

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 4036 10140 4052 10139 4050 10108 4035 10106
      4035 10136

$$

JACOBS

1 follow-up statement

320 
WGUS73 KLBF 080749
FFSLBF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
249 AM CDT SAT AUG 8 2015

NEC029-085-080759-
/O.EXP.KLBF.FF.W.0006.000000T0000Z-150808T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHASE NE-HAYES NE-
249 AM CDT SAT AUG 8 2015

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN CHASE AND SOUTHWESTERN
HAYES COUNTIES HAS EXPIRED...

FLOOD WATERS HAVE RECEDED...AND ARE NO LONGER EXPECTED TO POSE A
THREAT TO LIFE OR PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD
CLOSURES.

LAT...LON 4036 10140 4052 10139 4050 10108 4035 10106
      4035 10136

$$

ROBERG

The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 7, 6:31 PM MDT	Special Weather Statement	LBF	Deuel	29 min
Aug 7, 6:34 PM MDT	Special Weather Statement	LBF	Chase	26 min
Aug 7, 6:51 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	24 min
Aug 7, 7:00 PM MDT	Severe Thunderstorm Warning	LBF	Chase	30 min
Aug 7, 7:12 PM MDT	Severe Thunderstorm Warning	LBF	Perkins	33 min
Aug 7, 7:14 PM MDT	Special Weather Statement	LBF	Grant, McPherson	46 min
Aug 7, 7:22 PM MDT	Severe Thunderstorm Warning	LBF	Chase	38 min
Aug 7, 7:32 PM MDT	Tornado Warning	LBF	Chase	28 min
Aug 7, 7:39 PM MDT	Flash Flood Warning	LBF	Chase	5 hr
Aug 7, 7:49 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	41 min
Aug 7, 7:53 PM MDT	Special Weather Statement	LBF	Hooker, Thomas	52 min
Aug 7, 7:58 PM MDT	Severe Thunderstorm Warning	LBF	Chase	47 min
Aug 7, 8:26 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Hayes	49 min
Aug 7, 8:35 PM MDT	Special Weather Statement	LBF	Brown	40 min
Aug 7, 8:48 PM MDT	Special Weather Statement	LBF	Hayes	27 min
Aug 7, 8:50 PM MDT	Special Weather Statement	LBF	Frontier	25 min
Aug 7, 8:59 PM MDT	Special Weather Statement	LBF	Cherry	46 min
Aug 7, 9:12 PM MDT	Areal Flood Advisory	LBF	Lincoln	3 hr
Aug 7, 10:14 PM MDT	Special Weather Statement	LBF	Lincoln	46 min

Nearby

Flash Flood Warnings in Nebraska, 2015 Every 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.