Alert archive / Nebraska / Flash Flood Warnings in 2002

Flash Flood Warning 6, NWS North Platte, NE

August 26, 2002Grant County, Nebraska

NWS North Platte, NE issued this flash flood warning at Aug 26, 2002, 4:55 PM MDT for Grant County, Nebraska. It was in force for 2 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 26, 2002, 4:55 PM MDT (22:55 UTC)
Expired
Aug 26, 2002, 7:00 PM MDT
In force
2 hr
Issued by
NWS North Platte, NE
Area
Counties, with a storm outline in the text

County Grant County, NE

The radar

The North Platte radar (KLNX), 91 km from the middle of the area, began a volume at 22:57 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, 10.9 hours before the alert went out and 128 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 2002-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1929 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, N. Platte/Lee Bi, NE at 12:00Z on 2002-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 122 square meters per square second.193958Sfc1 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
1929 J/kg
Mixed-layer CIN
-185 J/kg
Mixed-layer LCL
1191 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
122 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.3

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLBF 262255
FFWLBF
NEC075-270100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
455 PM MDT MON AUG 26 2002

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GRANT COUNTY IN WEST CENTRAL NEBRASKA...

* UNTIL 700 PM MDT...

* AT 447 PM MDT...COUNTY SHERIFF REPORTED MINOR FLOODING WITH ONE
  FOOT OF WATER OVER HIGHWAY 2 JUST EAST OF HYANNIS.  THE STORMS
  THAT PRODUCED THE VERY HEAVY RAIN AND HAIL COVERING THE GROUND
  WILL CONTINUE TO MOVE SOUTH OF THE WARNING AREA THROUGH 7 PM MDT.

* LOCATIONS IN THE WARNING INCLUDE HYANNIS...WHITMAN.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER
LOW LYING AREAS ARE SUBJECT TO FLASH 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. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
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. IF YOUR VEHICLE STALLS, ABANDON IT IMMEDIATELY AND SEEK
HIGHER GROUND.

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

LAT...LON 4207 10144 4208 10200 4175 10205 4177 10144

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 3:26 AM MDTSevere Thunderstorm WarningLBFKeya Paha64 min
Aug 26, 3:49 AM MDTSevere Thunderstorm WarningLBFRock56 min
Aug 26, 4:14 AM MDTSevere Thunderstorm WarningLBFRock31 min
Aug 26, 4:45 AM MDTSevere Thunderstorm WarningLBFHolt, Rock60 min
Aug 26, 5:07 AM MDTSevere Thunderstorm WarningLBFHolt53 min
Aug 26, 6:54 AM MDTSevere Thunderstorm WarningLBFCherry51 min
Aug 26, 7:22 AM MDTSevere Thunderstorm WarningLBFBlaine, Brown53 min
Aug 26, 8:05 AM MDTSevere Thunderstorm WarningLBFCuster, Loup55 min
Aug 26, 8:12 AM MDTSevere Thunderstorm WarningLBFRock48 min
Aug 26, 8:24 AM MDTSevere Thunderstorm WarningLBFBlaine36 min
Aug 26, 12:17 PM MDTSevere Thunderstorm WarningLBFCherry58 min
Aug 26, 12:36 PM MDTTornado WarningLBFCherry39 min
Aug 26, 12:54 PM MDTSevere Thunderstorm WarningLBFChase66 min
Aug 26, 1:17 PM MDTTornado WarningLBFCherry58 min
Aug 26, 2:16 PM MDTSevere Thunderstorm WarningLBFCherry59 min
Aug 26, 2:29 PM MDTSevere Thunderstorm WarningLBFSheridan61 min
Aug 26, 3:03 PM MDTTornado WarningLBFSheridan57 min
Aug 26, 3:03 PM MDTTornado WarningLBFSheridan57 min
Aug 26, 3:15 PM MDTSevere Thunderstorm WarningLBFCherry60 min
Aug 26, 3:49 PM MDTSevere Thunderstorm WarningLBFGrant, Hooker, Thomas56 min
Aug 26, 4:03 PM MDTSevere Thunderstorm WarningLBFSheridan57 min
Aug 26, 4:29 PM MDTSevere Thunderstorm WarningLBFSheridan61 min
Aug 26, 4:47 PM MDTSevere Thunderstorm WarningLBFGrant, Hooker, Thomas58 min
Aug 26, 5:15 PM MDTSevere Thunderstorm WarningLBFGarden60 min
Aug 26, 5:31 PM MDTSevere Thunderstorm WarningLBFSheridan44 min
Aug 26, 5:42 PM MDTSevere Thunderstorm WarningLBFArthur, McPherson63 min

Nearby

Flash Flood Warnings in Nebraska, 2002Every flash flood warning in 2002

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.