Alert archive / Wyoming / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 2, NWS Riverton, WY
NWS Riverton, WY issued this severe thunderstorm warning at Jul 2, 1990, 6:29 PM MDT for Fremont County, Wyoming. It was in force for 31 min.
The area
The counties it named.
The facts
- Issued
- Jul 2, 1990, 6:29 PM MDT (00:29 UTC)
- Expired
- Jul 2, 1990, 7:00 PM MDT
- In force
- 31 min
- Issued by
- NWS Riverton, WY
- Area
- Whole counties
County Fremont 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 00:00Z, 0.5 hours before the alert went out and 25 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
- NaN m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KCYS 030029
SVRLND
WYC013-030100-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LANDER WY
ISSUED BY CHEYENNE WY
629 PM MDT MON JUL 2 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 700 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE CENTRAL PART OF WYOMING
CENTRAL FREMONT COUNTY
THIS INCLUDES THE CITY OF LANDER.
AT 520 PM MDT A THUNDERSTORM PRODUCED A WIND GUST OF 58 MILES
AN HOUR AT THE LANDER AIRPORT. THE STORM WAS MOVING NORTHEAST
AT 30 MILES AN HOUR.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PRO6TECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.
MENTZERWhat forecasters said that day
The local office's own words before this severe thunderstorm 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 2, 4:54 PM MDT, 1 hour 35 minutes before
WYZ002-022355- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LANDER WY 450 PM MDT MON JUL 02 1990 ...THUNDERSTORMS PRODUCING STRONG GUSTY WINDS AROUND CODY... AT 430 PM THE WINDS GUSTED TO 46 MILES AN HOUR AT THE CODY AIRPORT. THE PARK COUNTY EMERGENCY MANAGEMENT OFFICE REPORTED A WIND GUST TO 53 MILES AN HOUR ABOUT THE SAME TIME IN DOWNTOWN CODY. AT 445 PM THE WINDS HAD DROPPED TO 10 TO 20 MILES AN HOUR. FREQUENT LIGHTNING WAS REPORTED TO THE WEST AND SOUTHWEST OF CODY. THUNDERSTORMS WITH WIND GUSTS TO 55 MILES AN HOUR AND FREQUENT DEADLY LIGHTNING CAN BE EXPECTED IN CODY AND POWELL 20 MILES NORTHEAST OF CODY UNTIL 630 PM. IF THUNDERSTORMS APPROACH...SEEK SHELTER IN A STURDY BUILDING. AVOID TALL OBJECTS THAT MAY ATRACT LIGHTNING. BAKER
Special weather statement, Jul 2, 5:54 PM MDT, 35 minutes before
WYZ008-009-030055- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LANDER WY 550 PM MDT MON JUL 02 1990 ...THUNDERSTORMS PRODUCING STRONG GUSTY WINDS AROUND BIG PINEY... AT 530 PM THE WINDS GUSTED TO 54 MILES AN HOUR AT THE BIG PINEY AIRPORT 25 MILES SOUTHWEST OF PINEDALE. RADAR SHOWED THUNDERSTORMS AROUND PINEDALE AND AND BIG PINEY. THUNDERSTORMS WITH WIND GUSTS TO 55 MILES AN HOUR AND FREQUENT DEADLY LIGHTNING CAN BE EXPECTED IN PINEDALE AND BIG PINEY...AND IN THE WIND RIVER MOUNTAINS TO THE EAST UNTIL 700 PM. IF THUNDERSTORMS APPROACH...PEOPLE IN THE PINEDALE AND BIG PINEY AREA SHOULD BE ALERT FOR APPROACHING THUNDERSTORMS. CAMPERS SHOULD BE VERY CAREFUL WITH FIRES. STRONG GUS TY WINDS CAN QUICKLY SPREAD A SMALL CAMP FIRE INTO THE VERY DRY FORESTS. BAKER
Special weather statement, Jul 2, 6:08 PM MDT, 21 minutes before
WYZ009-010-030115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LANDER WY 605 PM MDT MON JUL 02 1990 ...THUNDERSTORMS WERE MOVING INTO LANDER... AT 600 PM THUNDERSTORMS WERE OVER THE WIND RIVER MOUNTAINS TO THE SOUTH AND WEST OF LANDER. THESE STORMS SHOULD MOVE INTO LANDER BY 615 PM. BRIEF HEAVY RAIN...FREQUENT LIGHTNING AND WIND GUSTS TO 55 MILES AN HOUR CAN BE EXPECTED WITH THESE STORMS. THE THUNDERSTORMS SHOULD MOVE OUT OF THE LANDER AREA BY 700 PM. BE PERPARED TO SEEK SHELTER IN A STRONG BUILDING AS THESE THUNDERSTORMS PASS. BAKER
Nearby
Severe Thunderstorm Warnings in Wyoming, 1990Every severe thunderstorm warning 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.