Alert archive / Wyoming / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 22, NWS Cheyenne, WY

June 13, 1986Laramie County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 13, 1986, 5:15 PM MDT for Laramie County, Wyoming. It was in force for 45 min.

The area

The counties it named.

The facts

Issued
Jun 13, 1986, 5:15 PM MDT (23:15 UTC)
Expired
Jun 13, 1986, 6:00 PM MDT
In force
45 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County 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, 11.3 hours before the alert went out and 202 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, Denver, CO at 12:00Z on 1986-06-13Temperature 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, Denver, CO at 12:00Z on 1986-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
1753 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 13, 1:55 PM MDT, 3 hours 20 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
150 PM MDT FRI JUN 13 1986

A TORNADO WATCH IS IN EFFECT FOR SOUTHEAST WYOMING UNTIL 8 PM.

AT 145 PM...WEATHER RADAR AT CHEYENNE SHOWED THAT THUNDERSTORMS WERE
BUILDING IN MUCH OF SOUTHEAST WYOMING.  THE STRONGEST STORMS WERE
LOCATED OVER THE LARAMIE MOUNTAINS ABOUT 15 MILES NORTHEAST OF LARAMIE.

OTHER STRONG STORMS WERE LOCATED IN NORTHERN PLATTE COUNTY ABOUT 35
MILES SOUTHEAST OF DOUGLAS NEAR THE TOWN OF WENDOVER.  YET ANOTHER
STRONG STORM WAS LOCATED JUST EAST OF SEMINOE RESERVOIR ABOUT 35 MILES
NORTHEAST OF RAWLINS.

ALL STORMS WERE MOVING EAST AT 20 MILES AN HOUR.  NO REPORTS OF SEVERE
WEATHER HAVE BEEN RECEIVED SO FAR AT THE NATIONAL WEATHER SERVICE.
ANY ONE OF THESE STORMS COULD PRODUCE STRONG WINDS...SMALL HAIL...AND
BRIEF HEAVY RAINS...SO BE ON THE ALERT AND KEEP AN EYE ON THE SKY.
DASELER
Special weather statement, Jun 13, 4:10 PM MDT, 1 hour 5 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
405 PM MDT FRI JUN 13 1986

A TORNADO WATCH REMAINS IN EFFECT UNTIL 8 PM MDT THIS FRIDAY EVENING
FOR PEOPLE IN THE NEBRASKA PANHANDLE.

AT 4PM MDT A HEAVY THUNDERSTORM HAD MOVED INTO THE SOUTHWEST CORNER
OF SOIUX COUNTY NEBRASKA OR 25 MILES NORTHWEST OF SCOTTSBLUFF NEBRASKA.
THIS STORM WILL PRODUCE HEAVY RAINS ALONG WITH POSSIBLE SMALL HAIL AND
STRONG GUSTY WINDS. THIS STORM WAS MOVING SOUTHEAST AT 25 MPH. PERSONS
IN SOUTHERN SIOUX AND NORTHERN SCOTTS BLUFF COUNTIES SHOULD BE ALERT
FOR THIS STORM.

OTHER SCATTERED SHOWERS AND THUNDERSTORMS HAD MOVED INTO THE WEST
PART OF THE NEBRASKA PANHANDLE AT 4PM MDT.
<
OTHER STRONG STORMS REMAINED IN EXTREME EASTERN WYOMING TO THE WEST AND
SOUTHWEST OF SCOTTSBLUFF NEBRASKA. THESE STORMS HAVE HAD TORNADOES
REPORTED WITH THESE STORMS IN EASTERN WYOMING. PEOPLE IN THE WEST
PARTS OF SCOTTSBLUFF, BANNER AND KIMBALL COUNTIES OF THE NEBRASKA
PANHANDLE SHOULD REMAIN VERY WATCHFUL FOR THESE EASTERN WYOMING
STORMS AS THEY REACH THE NEBRASKA PANHANDLE BETWEEN 430 AND 5 PM
MDT THIS AFTERNOON.
KARR

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 12, 6:07 PM MDTSevere Thunderstorm WarningCYSSioux58 min
Jun 12, 7:05 PM MDTSevere Thunderstorm WarningCYSScotts Bluff55 min
Jun 12, 8:14 PM MDTSevere Thunderstorm WarningCYSMorrill61 min
Jun 12, 9:25 PM MDTSevere Thunderstorm WarningCYSMorrill35 min
Jun 13, 2:30 PM MDTSevere Thunderstorm WarningCYSGoshen, Platte45 min
Jun 13, 3:15 PM MDTSevere Thunderstorm WarningCYSGoshen, Platte30 min
Jun 13, 3:20 PM MDTTornado WarningCYSLaramie40 min
Jun 13, 3:25 PM MDTTornado WarningCYSGoshen35 min
Jun 13, 3:50 PM MDTTornado WarningCYSGoshen, Platte40 min
Jun 13, 4:30 PM MDTTornado WarningCYSGoshen30 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 1986Every severe thunderstorm warning in 1986

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.