Alert archive / Colorado / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 101, NWS Denver/Boulder, CO

June 20, 1991Kit Carson County, Washington County, Yuma County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 20, 1991, 10:45 PM MDT for Kit Carson County, Washington County, Yuma County, Colorado. It was in force for 30 min.

The area

The counties it named.

The facts

Issued: Jun 20, 1991, 10:45 PM MDT (04:45 UTC)
Expired: Jun 20, 1991, 11:15 PM MDT
In force: 30 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties

Counties Kit Carson County, CO, Washington County, CO, Yuma County, CO

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.8 hours before the alert went out and 237 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1618 J/kg
Mixed-layer CIN: -189 J/kg
Mixed-layer LCL: 2050 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 14 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.

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, Jun 20, 8:17 PM MDT, 2 hours 28 minutes before

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Special weather statement, Jun 20, 8:29 PM MDT, 2 hours 16 minutes before

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Special weather statement, Jun 20, 9:06 PM MDT, 1 hour 39 minutes before

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Local storm report, Jun 20, 9:35 PM MDT, 1 hour 10 minutes before

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Special weather statement, Jun 20, 10:05 PM MDT, 40 minutes before

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Special weather statement, Jun 20, 10:06 PM MDT, 39 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 8:59 PM MDT	Severe Thunderstorm Warning	BOU	Yuma	31 min
Jun 20, 10:14 PM MDT	Severe Thunderstorm Warning	BOU	Washington	31 min
Jun 21, 1:51 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Denver, Jefferson	39 min
Jun 21, 2:26 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Boulder, Jefferson	34 min
Jun 21, 2:30 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Denver, Douglas, Jefferson	45 min
Jun 21, 3:02 PM MDT	Tornado Warning	BOU	Arapahoe, Douglas	28 min
Jun 21, 3:04 PM MDT	Severe Thunderstorm Warning	BOU	Denver, Jefferson	41 min
Jun 21, 3:27 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Douglas	33 min
Jun 21, 3:45 PM MDT	Severe Thunderstorm Warning	BOU	Jefferson	30 min
Jun 21, 4:40 PM MDT	Severe Thunderstorm Warning	BOU	Larimer	35 min
Jun 21, 4:55 PM MDT	Severe Thunderstorm Warning	BOU	Weld	35 min
Jun 21, 5:29 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Douglas	46 min
Jun 21, 5:50 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Denver, Jefferson	25 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1991 Every 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.