Alert archive / Nebraska / Tornado Warnings in 1990

Tornado Warning 7, NWS North Platte, NE

May 18, 1990Frontier County, Hitchcock County, Red Willow County, Nebraska

NWS North Platte, NE issued this tornado warning at May 18, 1990, 6:46 PM CDT for Frontier County, Hitchcock County, Red Willow County, Nebraska. It was in force for 44 min.

The area

The counties it named.

The facts

Issued
May 18, 1990, 6:46 PM CDT (23:46 UTC)
Expired
May 18, 1990, 7:30 PM CDT
In force
44 min
Issued by
NWS North Platte, NE
Area
Whole counties

Counties Frontier County, NE, Hitchcock County, NE, Red Willow 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 93 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 1990-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 43 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 1990-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 145 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
43 J/kg
Mixed-layer CIN
-469 J/kg
Mixed-layer LCL
1604 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
145 m²/s²
0-3 km storm-relative helicity
227 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 182347
TORLBF
NEC063-087-145-190030-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
646 PM CDT FRI MAY 18 1990
 
THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  730 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTHWEST NEBRASKA
          ...SOUTHERN FRONTIER...NORTHEASTERN HITCHCOCK
          ...WESTERN RED-WILLOW
 
AT 635 PM CDT RADAR INDICATED A TORNADO IN HITCHCOCK COUNTY NEAR THE
TOWN OF CULBERTSON...OR 53 MILES SOUTH OF NORTH PLATTE NEBRASKA.
THIS TORNADO WAS MOVING TO THE NORTH AT 30 MPH.
 
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF BSTURDY 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.
SJC

The office that day

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

IssuedProductOfficeCountiesLasted
May 18, 5:48 PM CDTSevere Thunderstorm WarningLBFKeith, Lincoln57 min
May 18, 6:25 PM CDTTornado WarningLBFLincoln50 min
May 18, 6:28 PM CDTSevere Thunderstorm WarningLBFKnox47 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.