Alert archive / Colorado / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 11, NWS Denver/Boulder, CO

May 19, 1991Arapahoe County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 19, 1991, 4:52 PM MDT for Arapahoe County, Colorado. It was in force for 53 min.

The area

The counties it named.

The facts

Issued
May 19, 1991, 4:52 PM MDT (22:52 UTC)
Expired
May 19, 1991, 5:45 PM MDT
In force
53 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties

County Arapahoe County, CO

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 10.9 hours before the alert went out and 98 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 1991-05-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 152 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 1991-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 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
152 J/kg
Mixed-layer CIN
-330 J/kg
Mixed-layer LCL
1662 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
50 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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

IssuedProductOfficeCountiesLasted
May 18, 6:59 PM MDTSevere Thunderstorm WarningBOUWeld61 min
May 19, 4:45 PM MDTSevere Thunderstorm WarningBOULarimer, Weld45 min
May 19, 4:52 PM MDTSevere Thunderstorm WarningBOUAdams, Weld53 min
May 19, 5:30 PM MDTSevere Thunderstorm WarningBOUWeld25 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.