Alert archive / Colorado / Winter Weather Advisories in 2012

Winter Weather Advisory 4, NWS Pueblo, CO

January 20, 2012Lake County, Colorado

NWS Pueblo, CO issued this winter weather advisory at Jan 20, 2012, 3:34 PM MST for Lake County, Colorado. It took effect at Jan 21, 2012, 11:00 AM MST. It was in force for 22 hr.

The area

The counties it named.

The facts

Issued: Jan 20, 2012, 3:34 PM MST (22:34 UTC)
In effect from: Jan 21, 2012, 11:00 AM MST
Expired: Jan 22, 2012, 9:00 AM MST
In force: 22 hr
Issued by: NWS Pueblo, CO

County Lake County, CO

The radar

The Grand Junction radar (KGJX), 162 km from the middle of the area, began a volume at 22:35 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

Grand Junction, CO (KGJT), launched 12:00Z, 10.6 hours before the alert went out and 186 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: 2199 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 152 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 weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pueblo, CO wrote its last area forecast discussion before this winter weather advisory went out at Jan 20, 3:25 PM MST, 9 minutes earlier.

Area forecast discussion, Jan 20, 3:25 PM MST, 9 minutes before

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Hazardous weather outlook, Jan 20, 9:05 AM MST, 6 hours 29 minutes before

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The office that day

Everything else NWS Pueblo, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 20, 4:30 AM MST	Winter Storm Watch	PUB	Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache	11 hr
Jan 20, 6:13 AM MST	High Wind Watch	PUB	Costilla, Custer, El Paso, Fremont, Huerfano, Las Animas and 2 more	10 hr
Jan 20, 3:34 PM MST	Winter Storm Warning	PUB	Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache	41 hr
Jan 20, 3:50 PM MST	High Wind Warning	PUB	Alamosa, Chaffee, Costilla, Custer, El Paso, Fremont and 5 more	31 hr

Nearby

Winter Weather Advisories in Colorado, 2012 Every winter weather advisory in 2012

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.