Alert archive / Nebraska / Flash Flood Warnings in 2007

Flash Flood Warning 2, NWS North Platte, NE

April 24, 2007Custer County, Nebraska

NWS North Platte, NE issued this flash flood warning at Apr 24, 2007, 12:37 PM CDT for Custer County, Nebraska. It took effect at Apr 24, 2007, 12:43 PM CDT. 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 counties it named.

The facts

Issued
Apr 24, 2007, 12:37 PM CDT (17:37 UTC)
In effect from
Apr 24, 2007, 12:43 PM CDT
Expired
Apr 24, 2007, 3:30 PM CDT
In force
3 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 17:37 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 12:00Z, 5.6 hours before the alert went out and 79 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, N. Platte/Lee Bi, NE at 12:00Z on 2007-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, N. Platte/Lee Bi, NE at 12:00Z on 2007-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
658 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
-130 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 241743
FFWLBF
NEC041-242030-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1237 PM CDT TUE APR 24 2007

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

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

* UNTIL 330 PM CDT

* AT 1231 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  VERY HEAVY RAIN OVER THE WARNED AREA AS A CLUSTER OF SHOWERS 
  AND THUNDERSTORMS WERE MOVING NORTHEAST AT 35 MPH. THE HEAVY 
  RAINFALL WILL INCREASE RUNOFF FOR A FLASH FLOOD POTENTIAL AS THE
  CLUSTER MOVES NORTHEAST THROUGH 2 PM CDT...PRODUCING AN ADDITIONAL
  1 TO 2 INCHES OF RAINFALL.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO VICTORIA
  SPRINGS STATE RECREATION AREA...WEISSERT...MERNA...GATES AND
  ANSELMO

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

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 4106 10018 4106 9940 4172 9940 4172 10023

$$

TLK
1 follow-up statement
000 
WGUS73 KLBF 241909
FFSLBF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
203 PM CDT TUE APR 24 2007

NEC041-242030-
CUSTER NE-
203 PM CDT TUE APR 24 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR
CUSTER COUNTY...

AT 201 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A CLUSTER OF SHOWERS AND THUNDERSTORM MOVING NORTHEAST 
THROUGH NORTHEAST CUSTER COUNTY PRODUCING MODERATE TO HEAVY RAIN 
OVER THE WARNED AREA. THE RAIN WILL DECREASE IN COVERAGE THROUGH 6 
PM CDT THEN INCREASE INTO THE EVENING. RADAR ESTIMATES INDICATE UP 
TO 4 INCHES OF RAIN HAS FALLEN IN PARTS OF CUSTER COUNTY SINCE 11 AM 
CDT. THERE WILL CONTINUE TO BE A CHANCE FOR AN ADDITIONAL INCH OF 
RAINFALL BEFORE THE RAIN COMES TO AN END ON WEDNESDAY. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO VICTORIA
SPRINGS STATE RECREATION AREA...WEISSERT...MERNA...GATES...BROKEN BOW
AND ANSELMO

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.

LAT...LON 4106 10018 4106 9940 4172 9940 4172 10023

$$

TLK

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 23, 11:23 PM CDTFlash Flood WatchLBFArthur, Blaine, Boyd, Brown, Chase, Cherry and 20 more26 hr
Apr 23, 11:58 PM CDTTornado WarningLBFChase32 min
Apr 24, 12:28 AM CDTSevere Thunderstorm WarningLBFChase62 min
Apr 24, 2:01 AM CDTSevere Thunderstorm WarningLBFFrontier33 min
Apr 24, 2:02 AM CDTSevere Thunderstorm WarningLBFHayes43 min
Apr 24, 3:40 AM CDTWind AdvisoryLBFArthur, Chase, Custer, Deuel, Frontier, Garden and 6 more17 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.