Alert archive / Wyoming / Tornado Warnings in 1986

Tornado Warning 9, NWS Cheyenne, WY

June 13, 1986Laramie County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jun 13, 1986, 3:20 PM MDT for Laramie County, Wyoming. It was in force for 40 min.

The area

The counties it named.

The facts

Issued
Jun 13, 1986, 3:20 PM MDT (21:20 UTC)
Expired
Jun 13, 1986, 4:00 PM MDT
In force
40 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, 9.3 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.

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, 3:15 PM MDTSevere Thunderstorm WarningCYSGoshen, Platte30 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

Tornado Warnings in Wyoming, 1986Every tornado warning in 1986Tornadoes 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.