Alert archive / Nebraska / Flash Flood Warnings in 2007

Flash Flood Warning 21, NWS North Platte, NE

May 29, 2007Custer County, Nebraska

NWS North Platte, NE issued this flash flood warning at May 29, 2007, 10:26 PM CDT for Custer County, Nebraska. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 29, 2007, 10:26 PM CDT (03:26 UTC)
Expired
May 30, 2007, 4:30 AM CDT
In force
6 hr
Issued by
NWS North Platte, NE
Area
Whole counties

County Custer County, NE

The radar

The North Platte radar (KLNX), 94 km from the middle of the area, began a volume at 03:29 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, 3.4 hours before the alert went out and 280 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-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 2007-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 8 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 2007-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
8 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
1209 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
-7 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.

000 
WGUS53 KLBF 300328
FFWLBF
NEC041-300930-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1026 PM CDT TUE MAY 29 2007

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CUSTER COUNTY IN CENTRAL NEBRASKA...
  THIS INCLUDES THE CITIES OF...BROKEN BOW...ARNOLD...

* UNTIL 430 AM CDT WEDNESDAY

* AT 1018 PM CDT...FLASH FLOODING REMAINS A THREAT OVER THE WARNED   
  AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ARCADIA
  DIVERSION DAM STATE WILDLIFE MANAGEMENT AREA...VICTORIA SPRINGS
  STATE RECREATION AREA...WESTERVILLE...WEISSERT...SARGENT...
  MILBURN...MERNA...GATES...COMSTOCK AND ANSELMO

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

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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. MOVE TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS THAT 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.

LAT...LON 4105 10021 4106 9922 4173 9922 4173 10025

$$

KAR
2 follow-up statements
000 
WGUS73 KLBF 300741
FFSLBF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
240 AM CDT WED MAY 30 2007

NEC041-300930-
CUSTER NE-
240 AM CDT WED MAY 30 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM CDT FOR
CUSTER COUNTY...

AT 238 AM CDT...THE STORMS THAT PROMPTED THE WARNING HAD MOVED OUT 
OF CUSTER COUNTY. ONLY ISOLATED THUNDERSHOWERS ARE EXPECTED NOW. 
HOWEVER...THE DRAINAGE FROM THE STORMS THAT WERE IN THE AREA WILL 
PROBABLY CONTINUE UNTIL AT LEAST 430 AM CDT.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ARCADIA
DIVERSION DAM STATE WILDLIFE MANAGEMENT AREA...VICTORIA SPRINGS STATE
RECREATION AREA...WESTERVILLE...WEISSERT...SARGENT...MILBURN...
MERNA...GATES...COMSTOCK...BROKEN BOW...ARNOLD AND ANSELMO

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. MOVE TO HIGHER GROUND.

LAT...LON 4105 10021 4106 9922 4173 9922 4173 10025

$$

SPRINGER
000 
WGUS73 KLBF 300931
FFSLBF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
424 AM CDT WED MAY 30 2007

NEC041-300934-
CUSTER NE-
424 AM CDT WED MAY 30 2007

...THE FLASH FLOOD WARNING WILL EXPIRE AT 430 AM CDT(330 AM MDT) FOR
CUSTER COUNTY...

HEAVY RAIN HAD ENDED IN CUSTER COUNTY. HOWEVER...PATCHES OF MODERATE 
RAIN ARE STILL POSSIBLE AND THE DRAINAGE FROM THE OVERNIGHT HEAVY 
RAINFALL WILL CONTINUE FOR AT ONE TO THREE HOURS.

LAT...LON 4105 10021 4106 9922 4173 9922 4173 10025

$$

SPRINGER

The office that day

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

IssuedProductOfficeCountiesLasted
May 29, 7:28 PM CDTFlash Flood WarningLBFLincoln4 hr
May 29, 8:24 PM CDTFlash Flood WarningLBFGarfield, Wheeler6 hr
May 29, 10:34 PM CDTFlash Flood WarningLBFFrontier, Hayes6 hr
May 29, 11:20 PM CDTFlash Flood WarningLBFLincoln6 hr

Nearby

Flash Flood Warnings in Nebraska, 2007Every flash flood warning in 2007

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.