Alert archive / Wyoming / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 71, NWS Cheyenne, WY

May 29, 1991Goshen County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at May 29, 1991, 3:11 PM MDT for Goshen County, Wyoming. It was in force for 34 min.

The area

The counties it named.

The facts

Issued
May 29, 1991, 3:11 PM MDT (21:11 UTC)
Expired
May 29, 1991, 3:45 PM MDT
In force
34 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Goshen County, WY

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 9.2 hours before the alert went out and 264 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 1991-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLLFCEL10008507005003002001001 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 1991-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -24 square meters per square second.19395878Sfc1 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
2 J/kg
Mixed-layer CIN
-300 J/kg
Mixed-layer LCL
1277 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
-24 m²/s²
0-3 km storm-relative helicity
84 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, May 29, 2:17 PM MDT, 54 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 28, 6:07 PM MDTSevere Thunderstorm WarningCYSBanner38 min
May 28, 6:32 PM MDTTornado WarningCYSBanner28 min
May 28, 7:01 PM MDTTornado WarningCYSBanner29 min
May 28, 7:32 PM MDTSevere Thunderstorm WarningCYSMorrill28 min
May 29, 3:40 PM MDTSevere Thunderstorm WarningCYSGoshen65 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 1991Every severe thunderstorm warning in 1991

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.