Alert archive / Wyoming / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 28, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 6, 1990, 3:03 PM MDT for Goshen County, Laramie County, Wyoming. It was in force for 42 min.
The area
The counties it named.
The facts
- Issued
- Jun 6, 1990, 3:03 PM MDT (21:03 UTC)
- Expired
- Jun 6, 1990, 3:45 PM MDT
- In force
- 42 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
Counties Goshen County, WY, Laramie 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
Denver, CO (KDEN), launched 12:00Z, 9.1 hours before the alert went out and 230 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
- 101 J/kg
- Mixed-layer CIN
- -396 J/kg
- Mixed-layer LCL
- 1467 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 89 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 062106
SVRCYS
WYC015-021-062145-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
303 PM MDT WED JUN 6 1990
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 345 PM MDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTHEAST WYOMING
...SOUTHERN GOSHEN...NORTHERN LARAMIE INCLUDING THE TOWNS
OF TORRINGTON...ALBIN...LAGRANGE AND HAWK SPRINGS...
AT 3 PM MDT WEATHER RADAR INDICATED SEVERE THUNDERSTORMS IN NORTHERN
LARAMIE AND SOUTHERN GOSHEN COUNTIES OF SOUTHEAST WYOMING. THE STORMS
WERE MOVE EAST NORTHEAST AT 30 MPH. HAIL UP TO 3/4 OF AN INCH WAS
REPORTED WITH THESE STORMS .
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
IF YOU ARE CAUGHT OUTSID:E...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.What 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, Jun 6, 1:26 PM MDT, 1 hour 37 minutes before
WYZ012-017-062130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 125 PM MDT TUE JUN 5 1990 THUNDERSTORMS HAVE BEGUN TO FORM EARLY THIS AFTERNOON OVER THE LARAMIE MOUNTAINS OF SOUTHEAST WYOMING. CONDITIONS WILL BE RIPE FOR STRONG THUNDERSTORMS THIS AFTERNOON AND EVENING OVER SOUTHEAST WYOMING EAST OF THE LARAMIE MOUNTAINS INCLUDING LARAMIE...PLATTE AND GOSHEN COUNTIES. THE STORMS WILL HAVE THE POTENTIAL FOR HAIL...STRONG GUSTY WINDS...HEAVY RAIN AND DANGEROUS LIGHTNING. PEOPLE IN SOUTHEAST WYOMING SHOULD WATCH THE SKY AND MONITOR LOCAL BROADCASTS FOR NEW DEVELOPMENTS. SCOTT
Special weather statement, Jun 6, 2:19 PM MDT, 44 minutes before
WYZ012-017-062230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 215 PM MDT WED JUN 6 1990 ...TORNADO WATCH FOR SOUTHEAST WYOMING... STRONG THUNDERSTORMS HAVE DEVELOPED IN NORTHERN LARAMIE COUNTY ABOUT 20 MILES NORTH OF CHEYENNE. THESE STORMS MOST LIKELY CONTAIN HAIL AND STRONG GUSTY WINDS. THE STORMS HAVE BEEN MOVING EAST AT ABOUT 30 MILES AN HOUR. THUNDERSTORMS WILL CONTINUE TO DEVELOP OVER SOUTHEAST WYOMING THIS AFTERNOON. SOME STORMS MAY BE SEVERE WITH LARGE HAIL...STRONG WINDS AND POSSIBLY TORNADOES. PEOPLE IN SOUTHEAST WYOMING SHOULD WATCH THE SKY AND STAY TUNED TO LOCAL BROADCASTS FOR NEW DEVELOPMENTS. SCOTT
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 4:49 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 41 min |
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.