Alert archive / Wyoming / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 33, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 6, 1990, 8:36 PM MDT for Goshen County, Laramie County, Wyoming. It was in force for 69 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 6, 1990, 8:36 PM MDT (02:36 UTC)
- Expired
- Jun 6, 1990, 9:45 PM MDT
- In force
- 69 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 6, 8:59 PM MDT | Hail 0.75 | Laramie, WY |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Denver, CO (KDEN), launched 00:00Z, 2.6 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
- 1329 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 2428 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KCYS 070236
SVRCYS
WYC021-015-070345-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
836 PM MDT WED JUN 6 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 945 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE SOUTHEAST PART OF WYOMING
CENTRAL AND EASTERN LARAMIE COUNTY...EXTREME SOUTHERN
GOSHEN COUNTY
THIS INCLUDES THE TOWNS OF LA GRANGE AND ALBIN.
AT 833 PM MDT RADAR CONTINUED TO INDICATE SEVERE THUNDERSTORMS
ACROSS CENTRAL LARAMIE COUNTY AND SOUTHERN GOSHEN COUNTY. THE
STRONGEST STORM WAS LOCATED ABOUT 20 MILES NORTHEAST OF CHEYENNE.
STORMS WERE MOVING EAST AT 35 MILES AN HOUR.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION 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.
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.
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, Jun 6, 4:28 PM MDT, 4 hours 8 minutes before
WYZ012-017-062330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 326 PM MDT WED JUN 6 1990 ...A TORNADO WATCH CONTINUES FOR SOUTHEAST WYOMING UNTIL 9 PM... AT 320 PM MDT SHOWERS AND THUNDERSTORMS CONTINUED ACROSS SOUTHEAST WYOMING. THE STRONGEST STORM WAS LOCATED JUST WEST OF WHEATLAND. ALL STORMS WERE MOVING EAST AT 35 MILES AN HOUR. THUNDERSTORMS WILL CONTINUE ACROSS SOUTHEAST WYOMING THE REST OF THIS EVENING. THESE STORMS WILL PRODUCE FREQUENT LIGHTNING...STRONG WINDS...AND HAIL. SOME STORMS MAY PRODUCE TORNADOS. IF YOU DO OBSERVE A TORNADO...TAKE SHELTER IMMEDIATELY. MENTZER
Special weather statement, Jun 6, 4:30 PM MDT, 4 hours 6 minutes before
WYZ012-017-062330- SPECIAL WEATHER STATEMENT...CORRECTION NATIONAL WEATHER SERVICE CHEYENNE WY 426 PM MDT WED JUN 6 1990 ...A TORNADO WATCH CONTINUES FOR SOUTHEAST WYOMING UNTIL 9 PM... AT 420 PM MDT SHOWERS AND THUNDERSTORMS CONTINUED ACROSS SOUTHEAST WYOMING. THE STRONGEST STORM WAS LOCATED JUST WEST OF WHEATLAND. ALL STORMS WERE MOVING EAST AT 35 MILES AN HOUR. THUNDERSTORMS WILL CONTINUE ACROSS SOUTHEAST WYOMING THE REST OF THIS EVENING. THESE STORMS WILL PRODUCE FREQUENT LIGHTNING...STRONG WINDS...AND HAIL. SOME STORMS MAY PRODUCE TORNADOS. IF YOU DO OBSERVE A TORNADO...TAKE SHELTER IMMEDIATELY. MENTZER
Special weather statement, Jun 6, 5:32 PM MDT, 3 hours 4 minutes before
NEZ001-005-070030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 0530 PM MDT WED JUN 6 1990 ...THUNDERSTORMS MOVING INTO THE CENTRAL NEBRASKA PANHANDLE... AT 0525 PM MDT...A STRONG THUNDERSTORMS MOVING INTO SCOTTS BLUFF AND SOUTHERN SIOUX COUNTIES OF THE NEBRASKA PANHANDLE. THE STORM IS LOCATED 15 MILES WEST OF SCOTTBLUFF OF SCOTTS BLUFF COUNTY. THE STORM IS MOVING NORTHEAST AT 35 MPH. BRIEF HEAVY RAIN...GUSTY WIND...DANyGEROUS LIGHTNING...AND SOME SMALL HAIL IS LIKELY WITH THIS THUNDERSTORMS AS IT MOVES THROUGH SCOTTS BLUFF AND SOUTHERN SIOUX COUNTIES OF THE WESTERN NEBRASKA PANHANDLE UNTIL 630 PM MDT. SALMONS
Special weather statement, Jun 6, 5:57 PM MDT, 2 hours 39 minutes before
WYZ012-017-070130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 555 PM MDT WED JUN 6 1990 ...TORNADO WATCH FOR SOUTHEAST WYOMING UNTIL 9PM TONIGHT... A TORNADO WATCH REMAINS IN EFFECT UNTIL 9PM TONIGHT FOR PARTS OF SOUTHEASTERN WYOMING. AT 545 PM SCATTERED THUNDERSTORMS EXTENDED FROM THE MOUNTAINS WEST OF CHEYENNE AND CHUGWATER...WHICH IS ABOUT 20 MILES SOUTH OF WHEATLAND... NORTHEAST TO THE NEBRASKA BORDER. THESE STORMS WERE MOVING NORTHEAST ABOUT 30 MILES AN HOUR. BETWEEN 445 PM AND 515 PM THIS EVENING A STORM PRODUCED HAIL BETWEEN ONE QUARTER OF AN INCH AND THREE QUARTERS OF AN INCH IN DIAMETER APPROXIMATELY 20 MILES NORTHEAST OF WHEATLAND AT GUERNSEY...AND$ ABOUT 20 MILES SOUTH OF LUSK NEAR JAY EM. < PEOPLE IN SOUTHEAST WYOMING SHOULD KEEP ABREAST OF THE LATEST DEVELOPMENTS. BE PREPARED TO TAKE SHELTER IF THREATENING WEATHER APPROACHES. CGB
Special weather statement, Jun 6, 6:08 PM MDT, 2 hours 28 minutes before
WYZ013-014-070100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 610 PM MDT WED JUN 6 1990 ...THUNDERSTORMS DEVELOP OVER SOUTHWEST WYOMING... AT 600 PM MDT RADAR AND SATELLITE IMAGERY INDICATED THAT SHOWERS AND THUNDERSTORMS HAD DEVELOPED FROM EVANSTON TO RAWLINS. THE STORMS WERE MOVING EAST AT 30 MILES AN HOUR. THUNDERSTORMS WILL CONTINUE UNTIL SUNSET...THEN WILL SLOWLY DECREASE. SOME OF THESE STORMS MAY PRODUCE GUSTY W1INDS AND FREQUENT LIGHTNING. MENTZER
Special weather statement, Jun 6, 7:40 PM MDT, 56 minutes before
NEZ001-005-011-070215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 740 PM MDT WED JUN 6 1990 ...TORNADO WATCH FOR NEBRASKA PANHANDLE UNTIL 9 PM MDT... ...THUNDERSTORMS MOVING ACROSS NEBRASKA PANHANDLE... AT 738 PM MDT...STRONG THUNDERSTORMS CONTINUE TO MOVE ACROSS THE NEBRASKA PANHANDLE. THE STRONGEST STORM WAS LOCATED 20 MILES SOUTH OF SCOTTSBLUFF NEBRASKA IN BANNER COUNTY. THE STORM WAS MOVING EAST AT 25 MILES AN HOUR.C BRIEF HEAVY RAIN...GUSTY WIND...AND SOME HAIL IS LIKELY WITH THIS THUNDERSTORM AS IT MOVES THROUGH BANNER COUNTY UNTIL 815 PM MDT. SALMONS
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 7:50 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 40 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.