Alert archive / Nebraska / Tornado Warnings in 1991

Tornado Warning 31, NWS North Platte, NE

June 17, 1991Grant County, Nebraska

NWS North Platte, NE issued this tornado warning at Jun 17, 1991, 3:10 PM MDT for Grant County, Nebraska. It was in force for 35 min.

The area

The counties it named.

The facts

Issued
Jun 17, 1991, 3:10 PM MDT (21:10 UTC)
Expired
Jun 17, 1991, 3:45 PM MDT
In force
35 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Grant County, NE

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 9.2 hours before the alert went out and 129 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 1991-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 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 1991-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 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
6 J/kg
Mixed-layer CIN
-602 J/kg
Mixed-layer LCL
1866 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
89 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 KLBF 172110
TORLBF
NEC075-172145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE NORTH PLATTE NE
310 PM MDT MON JUN 17 1991

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 345 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE NORTH CENTRAL PART OF NEBRASKA
      GRANT

AT 305 MDT A TORNADO WAS REPORTED BY HYANNIS FIRE DEPARTMENT AND
PUBLIC 15 MILES SOUTH OF ASBY AND 5 MILES SOUTH OF HYANNIS WHICH
IS 45 MILES EAST OF ALLIANCE.   THIS STORM IS EAST AT 25 MPH.

IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE TO BE IS IN
A BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...FIND SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.

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

 RC

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 16, 6:44 PM MDTSevere Thunderstorm WarningLBFKeith, Perkins61 min
Jun 17, 4:06 PM MDTSevere Thunderstorm WarningLBFHooker54 min
Jun 17, 4:07 PM MDTTornado WarningLBFCherry38 min
Jun 17, 4:34 PM MDTSevere Thunderstorm WarningLBFGrant36 min
Jun 17, 4:47 PM MDTSevere Thunderstorm WarningLBFCherry28 min
Jun 17, 5:24 PM MDTTornado WarningLBFMcPherson36 min

Nearby

Tornado Warnings in Nebraska, 1991Every tornado warning in 1991Tornadoes in 1991

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.