Alert archive / Wyoming / Tornado Warnings in 1993

Tornado Warning 4, NWS Cheyenne, WY

May 20, 1993Lincoln County, Sweetwater County, Wyoming

NWS Cheyenne, WY issued this tornado warning at May 20, 1993, 1:47 PM MDT for Lincoln County, Sweetwater County, Wyoming. It was in force for 13 min.

The area

The counties it named.

The facts

Issued
May 20, 1993, 1:47 PM MDT (19:47 UTC)
Expired
May 20, 1993, 2:00 PM MDT
In force
13 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

Counties Lincoln County, WY, Sweetwater County, WY

The nearest sounding before it

Lander/Hunt Fiel, WY (KLND), launched 12:00Z, 7.8 hours before the alert went out and 130 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, Lander/Hunt Fiel, WY at 12:00Z on 1993-05-20Temperature 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, Lander/Hunt Fiel, WY at 12:00Z on 1993-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
979 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
32 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 KCYS 201949
TORCYS
WYC023-037-202000-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
147 PM MDT THU MAY 20 1993
 
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  200 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST WYOMING
 
   ...SOUTHEASTERN LINCOLN COUNTY
   ...NORTHWESTERN SWEETWATER COUNTY
 
THE LINCOLN COUNTY SHERRIF'S OFFICE REPORTED A TORNADO DEVELOPING
OVER LABARGE 37 MILES NORTHEAST OF KEMMERER. THE PARENT THUNDERSTORM
WAS MOVING TO THE SOUTHEAST AT 20 MILES AN HOUR.
 
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.
 
WCJIN-WYSW
PAL

Nearby

Tornado Warnings in Wyoming, 1993Every tornado warning in 1993Tornadoes in 1993

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.