Alert archive / Nebraska / Flash Flood Warnings in 1998

Flash Flood Warning 7, NWS North Platte, NE

June 23, 1998Lincoln County, Nebraska

NWS North Platte, NE issued this flash flood warning at Jun 23, 1998, 2:51 AM CDT for Lincoln 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
Jun 23, 1998, 2:51 AM CDT (07:51 UTC)
Expired
Jun 23, 1998, 8:50 AM CDT
In force
6 hr
Issued by
NWS North Platte, NE
Area
Whole counties

County Lincoln County, NE

The radar

The North Platte radar (KLNX), 102 km from the middle of the area, began a volume at 07:54 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 00:00Z, 7.9 hours before the alert went out and 15 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 00:00Z on 1998-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1134 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 1998-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 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
1134 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
1509 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
174 m²/s²
Significant tornado parameter
0.2
Supercell composite
6.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 230748
FFWLBF
NEC111-231350-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
251 AM CDT TUE JUN 23 1998

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL AND SOUTHEASTERN LINCOLN COUNTY IN SOUTHWESTERN
  NEBRASKA

* UNTIL 850 AM CDT

* AT 244 AM CDT... NORTH PLATTE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH VERY HEAVY RAIN SOUTHERN LINCOLN COUNTY...
  MOVING SLOWLY NORTHEAST.

* HEAVY RAINFALL AMOUNTS EXCEEDING 3 INCHES IS CAUSING EXCESSIVE AND
  RAPID RUNOFF OVER SOUTHCENTRAL AND SOUTHEASTERN LINCOLN COUNTY
  RESULTING IN FLASH FLOODING OVER THE AREA.

DON'T DRIVE ACROSS FLOODED ROADS! MOST FLASH FLOOD DEATHS OCCUR IN
AUTOMOBILES.

RLB

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 22, 11:22 PM CDTSevere Thunderstorm WarningLBFSheridan48 min
Jun 23, 12:03 AM CDTSevere Thunderstorm WarningLBFCherry, Grant47 min
Jun 23, 1:09 AM CDTSevere Thunderstorm WarningLBFFrontier, Hayes66 min
Jun 23, 1:31 AM CDTFlash Flood WarningLBFHayes3 hr
Jun 23, 2:09 AM CDTFlash Flood WarningLBFHayes6 hr
Jun 23, 2:24 AM CDTSevere Thunderstorm WarningLBFCuster66 min

Nearby

Flash Flood Warnings in Nebraska, 1998Every flash flood warning in 1998

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.