Alert archive / Nebraska / Flash Flood Warnings in 1998

Flash Flood Warning 5, NWS North Platte, NE

June 23, 1998Hayes County, Nebraska

NWS North Platte, NE issued this flash flood warning at Jun 23, 1998, 1:31 AM CDT for Hayes County, Nebraska. 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
Jun 23, 1998, 1:31 AM CDT (06:31 UTC)
Expired
Jun 23, 1998, 4:30 AM CDT
In force
3 hr
Issued by
NWS North Platte, NE
Area
Whole counties

County Hayes County, NE

The radar

The Goodland radar (KGLD), 140 km from the middle of the area, began a volume at 06:35 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, 6.5 hours before the alert went out and 78 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 230629
FFWLBF
NEC085-230930-

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

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN HAYES COUNTY IN SOUTHWESTERN NEBRASKA

* UNTIL 430 AM CDT

* AT 120 AM CDT... NORTH PLATTE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH VERY HEAVY RAIN IN SOUTHWEST HAYES COUNTY...
  MOVING SLOWLY EAST.D

* HEAVY RAINS AND RAPID RUNOFF ALONG THE STINKING WATER CREEK AND
  FRENCHMAN CREEK IS MAKING FLOODING LIKELY IN SOUTHWEST HAYES
  COUNTY.

DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!

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, 2:09 AM CDTFlash Flood WarningLBFHayes6 hr
Jun 23, 2:24 AM CDTSevere Thunderstorm WarningLBFCuster66 min
Jun 23, 2:51 AM CDTFlash Flood WarningLBFLincoln6 hr

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.