Alert archive / Nebraska / Flash Flood Warnings in 2015

Flash Flood Warning 3, NWS North Platte, NE

June 16, 2015Keith County, Perkins County, Nebraska

NWS North Platte, NE issued this flash flood warning at Jun 16, 2015, 9:13 PM MDT for Keith County, Perkins County, Nebraska. It was in force for 6 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: Jun 16, 2015, 9:13 PM MDT (03:13 UTC)
Expired: Jun 17, 2015, 3:00 AM MDT
In force: 6 hr
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Flood severity: None

Counties Keith County, NE, Perkins County, NE

The radar

The North Platte radar (KLNX), 126 km from the middle of the area, began a volume at 03:15 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
Jun 16, 10:47 PM MDT	FLASH FLOOD	3 S Ogallala, NE	NEBRASKA HIGHWAY 61 IS HALF COVERED WITH WATER, WITH SOME LOCATIONS BEING 6 TO 8 INCHES DEEP.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.2 hours before the alert went out and 66 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: 830 J/kg
Mixed-layer CIN: -76 J/kg
Mixed-layer LCL: 1529 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 370 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 10.2

Open this sounding in Storm Lab

The text

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

506 
WGUS53 KLBF 170313
FFWLBF
NEC101-135-170900-
/O.NEW.KLBF.FF.W.0003.150617T0313Z-150617T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
913 PM MDT TUE JUN 16 2015

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN PERKINS COUNTY IN SOUTHWEST NEBRASKA...
  SOUTHEASTERN KEITH COUNTY IN SOUTHWEST NEBRASKA...

* UNTIL 300 AM MDT

* AT 911 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. DOPPLER RADAR ESTIMATED UP TO 5 INCHES OF RAINFALL    
  HAS ALREADY FALLEN THIS EVENING.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 4088 10165 4110 10177 4107 10127 4105 10127
      4104 10125 4101 10124 4101 10125 4100 10124
      4097 10124 4090 10125

$$

ROBERG

1 follow-up statement

968 
WGUS73 KLBF 170541
FFSLBF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1141 PM MDT TUE JUN 16 2015

NEC101-135-170900-
/O.CON.KLBF.FF.W.0003.000000T0000Z-150617T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KEITH NE-PERKINS NE-
1141 PM MDT TUE JUN 16 2015

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHEASTERN PERKINS AND
SOUTHEASTERN KEITH COUNTIES UNTIL 300 AM MDT...

AT 1139 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT FLASH FLOODING REMAINED POSSIBLE ACROSS PORTIONS OF 
NORTHEASTERN PERKINS AND SOUTHEASTERN KEITH COUNTY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS 
SAFELY. ROADS MAY ALSO BE WASHED OUT FROM FLASH FLOODING. 

&&

LAT...LON 4088 10165 4110 10177 4107 10127 4105 10127
      4104 10125 4101 10124 4101 10125 4100 10124
      4097 10124 4090 10125

$$

ROBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 6:06 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	24 min
Jun 16, 6:23 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln, Perkins	52 min
Jun 16, 6:27 PM MDT	Severe Thunderstorm Warning	LBF	Blaine, Brown, Cherry, Thomas	48 min
Jun 16, 6:28 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	47 min
Jun 16, 7:01 PM MDT	Severe Thunderstorm Warning	LBF	Blaine, Thomas	29 min
Jun 16, 7:12 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln, Perkins	63 min
Jun 16, 7:15 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	45 min
Jun 16, 7:30 PM MDT	Areal Flood Advisory	LBF	Lincoln	9 hr
Jun 16, 8:11 PM MDT	Severe Thunderstorm Warning	LBF	Garden	49 min
Jun 16, 8:13 PM MDT	Severe Thunderstorm Warning	LBF	Frontier, Hayes, Lincoln	47 min
Jun 16, 8:23 PM MDT	Areal Flood Advisory	LBF	Keith, Perkins	4 hr
Jun 16, 8:58 PM MDT	Severe Thunderstorm Warning	LBF	Frontier, Hayes	24 min
Jun 16, 8:59 PM MDT	Severe Thunderstorm Warning	LBF	Deuel, Garden, Keith	46 min
Jun 16, 9:25 PM MDT	Severe Thunderstorm Warning	LBF	Perkins	50 min
Jun 16, 9:42 PM MDT	Areal Flood Advisory	LBF	Lincoln, Perkins	6 hr
Jun 16, 9:43 PM MDT	Severe Thunderstorm Warning	LBF	Keith	47 min
Jun 16, 10:11 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Hayes, Lincoln, Perkins	49 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.