Alert archive / Wyoming / Tornado Warnings in 1990
Tornado Warning 32, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Jul 24, 1990, 4:06 PM MDT for Sweetwater County, Wyoming. It was in force for 39 min.
The area
The counties it named.
The facts
- Issued
- Jul 24, 1990, 4:06 PM MDT (22:06 UTC)
- Expired
- Jul 24, 1990, 4:45 PM MDT
- In force
- 39 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Sweetwater County, WY
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
Lander/Hunt Fiel, WY (KLND), launched 12:00Z, 10.1 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1912 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KCYS 242206
TORCYS
WYC037-242245-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
406 PM MDT TUE JUL 24 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 445 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTY
IN THE SOUTH CENTRAL PART OF WYOMING
CENTRAL AND WESTERN SWEETWATER COUNTY
AT 404 PM MDT A TORNADO WAS SPOTTED BY A HIGHWAY PATROLMAN ABOUT
33 MILES NORTH OF ROCK SPRINGS ALONG HIGHWAY 191. THE TORNADO
WAS MOVING NORTHEAST AT 20 MILES AN HOUR.
IF YOU ARE IN THE PATH OF THIS 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 ON THE
LOWEST FLOOR. USE BLANKETS OR PILLOWS TO COVER YOUR BODY.
MENTZERWhat forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 24, 1:02 PM MDT, 3 hours 4 minutes before
WYZ007-008-009-013-014-242000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 100 PM MDT TUE JUL 24 1990 RADAR AND LIGHTNING DETECTION EQUIPMENT SHOWED SCATTERED THUNDERSTORMS OVER SOUTHWEST WYOMING AT 1245 PM. MOST OF THE STORMS WERE BETWEEN EVANSTON AND KEMMERER WITH ANOTHER STRONG CELL FURTHER NORTH...JUST NORTHWEST OF PINEDALE. ALL OF THE THUNDERSTORMS WERE MOVING NORTHEAST AROUND 15 MILES AN HOUR. THUNDERSTORMS WILL CONTINUE OVER SOUTHWEST WYOMING THIS AFTERNOON AND EVENING. A FEW OF THE STORMS WILL PRODUCE BRIEF HEAVY RAIN...SMALL HAIL AND WIND GUSTS TO 50 MILES AN HOUR AS WELL AS DEADLY LIGHTNING. SCATTERED THUNDERSTORMS...A FEW POSSIBLY STRONG...WILL ALSOh BE DEVELOPING OVER SOUTHEAST WYOMING THROUGH THE EVENING. PEOPLE IN SOUTHERN WYOMING SHOULD BE ALERT TO DEVELOPING THUNDERSTORMS THIS AFTERNOON AND EVENING. SHOULD A STORM APPROACH YOUR AREA...SEEK A SAFE PLACE IMMEDIATELY. HATTEN
Special weather statement, Jul 24, 2:09 PM MDT, 1 hour 57 minutes before
WYZ007-008-009-013-014-015-016-017-242100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 205 PM MDT TUE JUL 24 1990 THUNDERSTORMS CONTINUE TO DEVELOP OVER THE WEST AND SOUTH PART OF WYOMING EARLY THIS AFTERNOON. AT 155 PM MDT THE STRONGEST STORMS IN THE SOUTH AND WEST WERE LOCATED BETWEEN EVANSTON AND AFTON...WEST OF ROCK SPRINGS AND ABOUT 20 MILES NORTHWEST OF CHEYENNE. ALL OF THE STORMS WERE MOVING TO THE EAST OR NORTHEAST AT 20 MILES AN HOUR. THE STORMS WILL PRODUCE STRONG AND GUSTY WINDS TO 50 MILES AN HOUR... HAIL...DANGEROUS LIGHTNING AND BRIEF HEAVY RAIN. THUNDERSTORMS WILL BE LIKELY OVER MUCH OF WYOMING THROUGH EARLY TONIGHT. PEOPLE IN THE STATE SHOULD BE A1LERT TO THE POSSIBILITY OF THUNDERSTORMS AND TAKE IMMEDIATE COVER AS LIGHTNING CAN BE DEADLY. WEILAND
Special weather statement, Jul 24, 4:00 PM MDT, 6 minutes before
WYZ007-008-009-013-014-242300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 400 PM MDT TUE JUL 24 1990 ...STRONG THUNDERSTORMS CONTINUE OVER SOUTHWEST WYOMING... STRONG THUNDERSTORMS CONTINUED OVER THE SOUTHWEST PART OF WYOMING AT MID AFTERNOON. AT 350 PM MDT EVANSTON REPORTED PEA SIZED DIAMETER HAIL...WIND GUSTS TO 45 MILES AND HEAVY RAIN. OTHER STRONG THUNDER STORMS IN SOUTHWEST WYOMING WERE LOCATED 15 MILES WEST OF ROCK SPRINGS AS WELL AS NEAR AFTON. ALL OF THE STORMS WERE MOVING TO THE NORTHEAST AT 35 MILES AN HOUR. THUNDERSTORMS IN THE SOUTHWEST PART OF THE STATE WILL CONTINUE THROUGH THE EVENING HOURS BEFORE ENDING. TIL THAT TIME...HEAVY RAINFALL... HAIL...DANGEROUS LIGHTNING AND WIND GUSTS TO 50 MILES AN HOUR ARE LIKELY WITH THE STORMS. PEOPLE IN SOUTHWEST WYOMING SHOULD BE AWARE OF THE STRONG THUNDERSTORMS IN THE AREA. IF A STORM APPROACHES...TAKE IMMEDIATE SHELTER AND STAY OFF OF THE PHONE AS THE LIGHTNING FROM THE STORMS CAN BE DEADLY. WEILAND
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 2:58 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 62 min |
| Jul 24, 3:36 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 49 min |
Nearby
Tornado Warnings in Wyoming, 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.