Alert archive / Nebraska / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 21, NWS North Platte, NE

June 1, 1990Keith County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 1, 1990, 8:21 PM MDT for Keith County, Nebraska. It was in force for 54 min.

The area

The counties it named.

The facts

Issued
Jun 1, 1990, 8:21 PM MDT (02:21 UTC)
Expired
Jun 1, 1990, 9:15 PM MDT
In force
54 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Keith 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 00:00Z, 2.4 hours before the alert went out and 89 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 1990-06-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1876 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 1990-06-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.1939587897Sfc1 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
1876 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
1838 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
106 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 020221
SVRLBF
NEC101-020315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE NORTH PLATTE NE
821 PM MDT FRI JUN 1 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 915 PM MDT FOR PEOPLE IN THE FOLLOWING 
COUNTY

   IN THE SOUTHWEST PART OF NEBRASKA
      KEITH

AT 815 PM MDT...SEVERE THUNDERSTORMS HAD PRODUCED MARBLE TO
GOLFBALL SIZED HAIL 4 MILES SOUTH OF BRULE NEBRASKA...OR
48 MILES WEST OF NORTH PLATTE.

THESE THUNDERSTORMS WILL CONTINUE MOVING NORTHEAST THROUGH
KEITH COUNTY UNTIL 915 PM MDT.

IF YOU ARE IN THE AREA THREATENED BY THE STORM...GO TO A REINFORCED
SHELTER AND PREPARE FOR STRONG DAMAGING WIND...LARGE HAIL...VERY
HEAVY RAIN...AND DEADLY LIGHTNING.

REMEMBER...SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE A
TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOKOUT!!

 SJC 0219Z

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 1, 7:05 PM MDTTornado WarningLBFCuster25 min
Jun 1, 7:15 PM MDTTornado WarningLBFCuster45 min
Jun 1, 7:31 PM MDTSevere Thunderstorm WarningLBFKeya Paha29 min
Jun 1, 7:32 PM MDTTornado WarningLBFCuster28 min
Jun 1, 7:58 PM MDTTornado WarningLBFCuster32 min
Jun 1, 7:59 PM MDTTornado WarningLBFLoup31 min
Jun 1, 8:17 PM MDTTornado WarningLBFPerkins28 min
Jun 1, 8:38 PM MDTSevere Thunderstorm WarningLBFGarfield, Holt42 min
Jun 1, 8:53 PM MDTSevere Thunderstorm WarningLBFLincoln67 min
Jun 1, 10:12 PM MDTSevere Thunderstorm WarningLBFCuster63 min

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.