Alert archive / Colorado / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 11, NWS Denver/Boulder, CO

June 11, 1992Arapahoe County, Douglas County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 11, 1992, 2:35 PM MDT for Arapahoe County, Douglas County, Colorado. It was in force for 30 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 11, 1992, 2:35 PM MDT (20:35 UTC)
Expired: Jun 11, 1992, 3:05 PM MDT
In force: 30 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties

Counties Arapahoe County, CO, Douglas County, CO

What was reported inside it

Time	Report	Where	Remark
Jun 11, 2:53 PM MDT	Hail 0.75	Douglas, CO

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Fort Carson/Butt, CO (KFCS), launched 12:00Z, 8.6 hours before the alert went out and 90 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1399 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 28 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, Jun 11, 11:39 AM MDT, 2 hours 56 minutes before

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Special weather statement, Jun 11, 2:14 PM MDT, 21 minutes before

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Special weather statement, Jun 11, 2:28 PM MDT, 7 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 11, 3:05 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Douglas	40 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1992 Every severe thunderstorm warning in 1992

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.