Alert archive / Nebraska / Flash Flood Warnings in 2011

Flash Flood Warning 14, NWS North Platte, NE

July 11, 2011Sheridan County, Nebraska

NWS North Platte, NE issued this flash flood warning at Jul 11, 2011, 4:04 PM MDT for Sheridan 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: Jul 11, 2011, 4:04 PM MDT (22:04 UTC)
Expired: Jul 11, 2011, 10:00 PM MDT
In force: 6 hr
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Flood severity: None

County Sheridan County, NE

The radar

The Rapid City radar (KUDX), 143 km from the middle of the area, began a volume at 22:07 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
Jul 11, 8:00 PM MDT	FLASH FLOOD	5 N Rushville, NE	A RURAL ROAD WASHED OUT NORTH OF RUSHVILLE.

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

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 10.1 hours before the alert went out and 138 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1860 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -49 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

661 
WGUS53 KLBF 112204
FFWLBF
NEC161-120400-
/O.NEW.KLBF.FF.W.0014.110711T2204Z-110712T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
404 PM MDT MON JUL 11 2011

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL SHERIDAN COUNTY IN THE PANHANDLE OF NEBRASKA...

* UNTIL 1000 PM MDT

* AT 402 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. RADAR WAS ESTIMATING RAINFALL AMOUNTS OF 4 INCHES HAD 
  FALLEN IN THE AREA. ALSO...MORE STORMS MAY MOVE ACROSS THE AREA    
  LATER THIS EVENING BRINGING THE POSSIBILITY OF MORE HEAVY RAINFALL.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  INTERSECTION OF BEAVER CREEK ROAD AND WHITE CLAY CREEK ROAD...
  INTERSECTION OF HIGHWAY 87 AND LARABEE ROAD AND METCALF STATE
  WILDLIFE MANAGEMENT AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN NORTH
PLATTE.

&&

LAT...LON 4295 10235 4275 10236 4270 10275 4293 10278

$$

BROOKS

1 follow-up statement

019 
WGUS73 KLBF 120204
FFSLBF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
804 PM MDT MON JUL 11 2011

NEC161-120400-
/O.CON.KLBF.FF.W.0014.000000T0000Z-110712T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SHERIDAN NE-
804 PM MDT MON JUL 11 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTH CENTRAL SHERIDAN
COUNTY UNTIL 1000 PM MDT...

AT 804 PM MDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT FLASH 
FLOODING WAS OCCURRING 5 MILES NORTH OF RUSHVILLE.

SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
INTERSECTION OF BEAVER CREEK ROAD AND WHITE CLAY CREEK ROAD...
INTERSECTION OF HIGHWAY 87 AND LARABEE ROAD AND METCALF STATE
WILDLIFE MANAGEMENT AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR
OCCURRING. IF YOU ARE IN THE WARNING AREA...MOVE TO HIGHER GROUND
IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO
CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY SO THAT THEY
MAY TAKE APPROPRIATE ACTION TO CLOSE FLOODED ROADWAYS. THEY WILL
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN NORTH PLATTE.

&&

LAT...LON 4295 10235 4275 10236 4270 10275 4293 10278

$$

SPRINGER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 6:03 PM MDT	Severe Thunderstorm Warning	LBF	McPherson	42 min
Jul 10, 6:30 PM MDT	Severe Thunderstorm Warning	LBF	Logan, McPherson	60 min
Jul 10, 7:02 PM MDT	Severe Thunderstorm Warning	LBF	Custer	58 min
Jul 10, 7:33 PM MDT	Severe Thunderstorm Warning	LBF	Custer	31 min
Jul 10, 7:44 PM MDT	Severe Thunderstorm Warning	LBF	Frontier, Hayes	46 min
Jul 10, 7:52 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Hayes	38 min
Jul 10, 8:00 PM MDT	Severe Thunderstorm Warning	LBF	Custer	60 min
Jul 10, 8:26 PM MDT	Severe Thunderstorm Warning	LBF	Frontier, Lincoln	49 min
Jul 10, 8:31 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Hayes, Lincoln, Perkins	44 min
Jul 10, 8:58 PM MDT	Severe Thunderstorm Warning	LBF	Custer	62 min
Jul 10, 9:02 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	43 min
Jul 10, 10:07 PM MDT	Severe Thunderstorm Warning	LBF	Garfield, Wheeler	38 min
Jul 11, 3:19 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	56 min
Jul 11, 4:12 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	63 min
Jul 11, 5:14 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	61 min

Nearby

Flash Flood Warnings in Nebraska, 2011 Every flash flood warning in 2011

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.