Alert archive / Wyoming / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 21, NWS Cheyenne, WY

June 13, 1986Goshen County, Platte County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 13, 1986, 3:15 PM MDT for Goshen County, Platte County, Wyoming. It was in force for 30 min.

The area

The counties it named.

The facts

Issued
Jun 13, 1986, 3:15 PM MDT (21:15 UTC)
Expired
Jun 13, 1986, 3:45 PM MDT
In force
30 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

Counties Goshen County, WY, Platte 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

Rapid City, SD (KRAP), launched 12:00Z, 9.3 hours before the alert went out and 261 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, Rapid City, SD 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 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Rapid City, SD at 12:00Z on 1986-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 167 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
997 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
167 m²/s²
0-3 km storm-relative helicity
186 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KCYS 132114
SVRCYS
WYC031-015-132145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
315 PM MDT FRI JUN 13 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 345 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

SOUTHEAST WYOMING..SOUTH HALF OF PLATTE AND SOUTH HALF OF GOSHEN

AT 310 PM RADAR INDICATED A SEVERE THUNDERSTORM IN CENTRAL PLATTE
COUNTY...BETWEEN WHEATLAND AND 15 MILES EAST OF WHEATLAND.  THE
THUNDERSTORM WAS MOVING TO THE SOUTHEAST 25 MPH.

THE SHERIFF AT WHEATLAND REPORTED LARGE HAIL THE SIZE OF QUARTERS
AT WHEATLAND AROUND 3 PM MDT.

IF SEVERE WEATHER IS SPOTTED...CONTACT YOUR COUNTY SHERIFF WHEN IT IS
SAFE TO DO SO.  THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER
SERVICE.
HICKEY

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 13, 2:30 PM MDTSevere Thunderstorm WarningCYSGoshen, Platte45 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
Jun 13, 5:15 PM MDTSevere Thunderstorm WarningCYSLaramie45 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.