Alert archive / Nebraska / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 99, NWS North Platte, NE

August 25, 1990Keya Paha County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 25, 1990, 6:45 PM CDT for Keya Paha County, Nebraska. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Aug 25, 1990, 6:45 PM CDT (23:45 UTC)
Expired
Aug 25, 1990, 7:45 PM CDT
In force
60 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Keya Paha County, NE

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.8 hours before the alert went out and 208 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 1990-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1146 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 12:00Z on 1990-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
1146 J/kg
Mixed-layer CIN
-238 J/kg
Mixed-layer LCL
2101 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
54 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 
TTAA00 KOFK 252345
SVROFK
NEC103-260045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE NORFOLK NE
645 PM CDT SAT AUG 25 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 745 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY

   IN THE NORTH CENTRAL PART OF NEBRASKA
      NORTHERN KEYA PAHA

AT 635 PM CDT NORFOLK RADAR INDICATED A SEVERE THUNDERSTORM ABOUT
10 MILES NORTHWEST OF SPRINGVIEW IN NORTHWEST KEYA PAHA COUNTY.
THE STORM WAS MOVING TO THE EAST AT ABOUT 15 MPH.  THIS STORM WILL
BE MOVING OVER RURAL AREA JUST NORTH OF SPRINGVIEW AND POSSIBLY
APPROACHING THE MILLS AREA DURING THE NEXT HOUR.

SEVERE THUNDERSTORMS PRODUCE D$AMAGING WINDS...LARGE HAIL...DEADLY
LIGHTNING AND VERY HEAVY RAIN THAT CAN QUICKLY FLOOD A LOW LYING
AREA.  SEVERE THUNDERSTORMS CAN ALSO PRODUCE A TORNADO WITH LITTLE
OR NO WARNING.

Nearby

Severe Thunderstorm Warnings in Nebraska, 1990Every severe thunderstorm warning in 1990

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.