Alert archive / Colorado / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 30, NWS Denver/Boulder, CO

May 27, 1991Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 27, 1991, 6:02 PM MDT for Weld County, Colorado. It was in force for 58 min.

The area

The counties it named.

The facts

Issued
May 27, 1991, 6:02 PM MDT (00:02 UTC)
Expired
May 27, 1991, 7:00 PM MDT
In force
58 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties

County Weld County, CO

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 0.0 hours before the alert went out and 125 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 00:00Z on 1991-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 202 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 00:00Z on 1991-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.1939587897Sfc1 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
202 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
2734 m above ground
0-6 km bulk shear
78 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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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 Denver/Boulder, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 27, 6:44 PM MDTSevere Thunderstorm WarningBOUMorgan, Weld61 min
May 27, 7:42 PM MDTSevere Thunderstorm WarningBOULogan, Morgan, Washington63 min
May 28, 3:08 PM MDTSevere Thunderstorm WarningBOUAdams, Weld52 min
May 28, 3:42 PM MDTSevere Thunderstorm WarningBOUWeld48 min
May 28, 4:14 PM MDTSevere Thunderstorm WarningBOUYuma46 min
May 28, 4:35 PM MDTSevere Thunderstorm WarningBOUWeld22 min

Nearby

Severe Thunderstorm Warnings in Colorado, 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.