Alert archive / Nebraska / Tornado Warnings in 1990

Tornado Warning 19, NWS Cheyenne, WY

June 1, 1990Morrill County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jun 1, 1990, 5:48 PM MDT for Morrill County, Nebraska. It was in force for 27 min.

The area

The counties it named.

The facts

Issued
Jun 1, 1990, 5:48 PM MDT (23:48 UTC)
Expired
Jun 1, 1990, 6:15 PM MDT
In force
27 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Morrill 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

Denver, CO (KDEN), launched 12:00Z, 11.8 hours before the alert went out and 206 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, Denver, CO at 12:00Z on 1990-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 1990-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 95 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3029 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
95 m²/s²
0-3 km storm-relative helicity
96 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 KBFF 012348
TORBFF
NEC123-020015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
548 PM MDT FRI JUN 1 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 615 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE PANHANDLE OF NEBRASKA
      NORTHERN MORRILL

AT 545 PM MDT...A TORNADO WAS INDICATED BY RADAR 28 MILES SOUTHWEST
OF ALLIANCE NEBRASKA...JUST 3 MILES NORTH OF BRIDGEPORT IN MORRILL
COUNTY.  THE STORM IS MOVING EAST AT 15 MILES AN HOUR.

THIS WARNING REPLACES THE SEVERE THUNDERSTORM WARNING ORIGINALLY
ISSUED FOR MORRILL COUNTY AT 530 PM MDT.

TAKE SHELTER IN A BASEMENT IF AVAILABLE.  OTHERWISE GO TO A SMALL
INTERIOR ROOM ON THE LOWEST FLOOR.  STAY AWAY FROM WINDOWS.  ABANDON
CARS AND MOBILE HOMES.

DO NOT TRY TO OUTRUN A TORNADO IN A CAR.  CARS ARE EASILY TOSSED
AROUND BY TORNADOES.  IF YOU ARE CAUGHT IN THE PATH OF A TORNADO...
LEAVE THE CAR AND GO TO A REINFORCED BUILDING.  IF NO STRUCTURE IS
NEARBY...TAKE SHELTER IN A DITCH OR LOW SPOT AWAY FROM THE VEHICLE.

TAKE COVER NOW.

PFEIFFER

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 1, 1:06 PM MDTSevere Thunderstorm WarningCYSSheridan69 min
Jun 1, 2:17 PM MDTSevere Thunderstorm WarningCYSGarden58 min
Jun 1, 2:18 PM MDTSevere Thunderstorm WarningCYSSheridan32 min
Jun 1, 3:15 PM MDTSevere Thunderstorm WarningCYSSheridan60 min
Jun 1, 3:18 PM MDTSevere Thunderstorm WarningCYSGarden22 min
Jun 1, 4:16 PM MDTSevere Thunderstorm WarningCYSSheridan59 min
Jun 1, 4:51 PM MDTSevere Thunderstorm WarningCYSBox Butte, Sheridan54 min
Jun 1, 5:33 PM MDTSevere Thunderstorm WarningCYSMorrill57 min

Nearby

Tornado Warnings in Nebraska, 1990Every tornado warning in 1990Tornadoes 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.