Alert archive / Colorado / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 184, NWS Denver/Boulder, CO

July 25, 2009Park County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 25, 2009, 3:41 PM MDT for Park County, Colorado. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 25, 2009, 3:41 PM MDT (21:41 UTC)
Expired: Jul 25, 2009, 4:12 PM MDT
In force: 31 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon

County Park County, CO

The radar

The Denver radar (KFTG), 125 km from the middle of the area, began a volume at 21:45 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 9.7 hours before the alert went out and 229 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: 156 J/kg
Mixed-layer CIN: -352 J/kg
Mixed-layer LCL: 848 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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.

NWS Denver/Boulder, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 25, 3:00 PM MDT, 41 minutes earlier.

Area forecast discussion, Jul 25, 3:00 PM MDT, 41 minutes before

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Hazardous weather outlook, Jul 25, 10:47 AM MDT, 4 hours 54 minutes before

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In the hours before

Special weather statement, Jul 25, 2:34 PM MDT, 1 hour 7 minutes before

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Special weather statement, Jul 25, 3:24 PM MDT, 17 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
Jul 24, 7:10 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Sedgwick	50 min
Jul 24, 7:55 PM MDT	Severe Thunderstorm Warning	BOU	Sedgwick	50 min
Jul 25, 2:34 PM MDT	Special Weather Statement	BOU	Clear Creek	26 min
Jul 25, 3:24 PM MDT	Special Weather Statement	BOU	Teller	51 min
Jul 25, 3:53 PM MDT	Areal Flood Advisory	BOU	Park	97 min
Jul 25, 5:51 PM MDT	Areal Flood Advisory	BOU	Larimer	54 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2009 Every severe thunderstorm warning in 2009

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; radar from the NEXRAD Level II archive.