Alert archive / Nebraska / Tornado Warnings in 1991

Tornado Warning 33, NWS North Platte, NE

June 17, 1991McPherson County, Nebraska

NWS North Platte, NE issued this tornado warning at Jun 17, 1991, 6:24 PM CDT for McPherson County, Nebraska. It was in force for 36 min.

The area

The counties it named.

The facts

Issued
Jun 17, 1991, 6:24 PM CDT (23:24 UTC)
Expired
Jun 17, 1991, 7:00 PM CDT
In force
36 min
Issued by
NWS North Platte, NE
Area
Whole counties

County McPherson County, NE

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.4 hours before the alert went out and 62 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 172325
TORLBF
NEC117-180000-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
624 PM CDT MON JUN 17 1991
 
THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  700 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTH CENTRAL NEBRASKA
 
   ...NORTHEASTERN MCPHERSON COUNTY
 
AT 618 PM CDT...RADAR INDICATED A POSSIBLE TORNADO 8 MILES WEST OF
TRYON...WHICH IS 35 MILES NORTHWEST OF NORTH PLATTE. THE SEVERE
THUNDERSTORM PRODUCING THE POSSIBLE TORNADO WAS MOVING NORTHEAST AT 25
MPH. PERSONS IN TRYON SHOULD TAKE COVER!!
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK 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 TORNADeO.  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...SEEK SHELTER IN A DITCH OR LOW SPOT.
 
WALAWENDER 2324Z

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 16, 7:44 PM CDTSevere Thunderstorm WarningLBFKeith, Perkins61 min
Jun 17, 4:10 PM CDTTornado WarningLBFGrant35 min
Jun 17, 5:06 PM CDTSevere Thunderstorm WarningLBFHooker54 min
Jun 17, 5:07 PM CDTTornado WarningLBFCherry38 min
Jun 17, 5:34 PM CDTSevere Thunderstorm WarningLBFGrant36 min
Jun 17, 5:47 PM CDTSevere Thunderstorm WarningLBFCherry28 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.