Alert archive / Colorado / Winter Storm Warnings in 2008

Winter Storm Warning 11, NWS Denver/Boulder, CO

November 29, 20089 counties in Colorado

NWS Denver/Boulder, CO issued this winter storm warning at Nov 29, 2008, 12:48 PM MST for 9 counties in Colorado. It was in force for 34 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Nov 29, 2008, 12:48 PM MST (19:48 UTC)
Expired: Nov 30, 2008, 11:00 PM MST
In force: 34 hr
Issued by: NWS Denver/Boulder, CO

Counties Boulder County, CO, Clear Creek County, CO, Gilpin County, CO, Grand County, CO, Jackson County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Summit County, CO

The radar

The Denver radar (KFTG), 102 km from the middle of the area, began a volume at 19:53 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, 7.8 hours before the alert went out and 213 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: 1026 m above ground
0-6 km bulk shear: 109 kt
0-1 km storm-relative helicity: 170 m²/s²
0-3 km storm-relative helicity: 317 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 winter storm 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 winter storm warning went out at Nov 29, 4:05 AM MST, 8 hours 43 minutes earlier.

Area forecast discussion, Nov 29, 4:05 AM MST, 8 hours 43 minutes before

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Hazardous weather outlook, Nov 29, 11:36 AM MST, 1 hour 12 minutes before

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In the hours before

Local storm report, Nov 29, 7:28 AM MST, 5 hours 20 minutes before

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Local storm report, Nov 29, 8:24 AM MST, 4 hours 24 minutes before

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Local storm report, Nov 29, 8:37 AM MST, 4 hours 11 minutes before

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Local storm report, Nov 29, 9:03 AM MST, 3 hours 45 minutes before

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Local storm report, Nov 29, 10:45 AM MST, 2 hours 3 minutes before

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Local storm report, Nov 29, 11:39 AM MST, 1 hour 9 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
Nov 29, 4:27 AM MST	Winter Weather Advisory	BOU	Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more	8 hr
Nov 29, 12:48 PM MST	Winter Weather Advisory	BOU	Grand, Jackson, Summit	15 hr

Nearby

Winter Storm Warnings in Colorado, 2008 Every winter storm warning in 2008

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.