Alert archive / Colorado / Winter Storm Warnings in 2017

Winter Storm Warning 3, NWS Grand Junction, CO

January 10, 201710 counties in Colorado

NWS Grand Junction, CO issued this winter storm warning at Jan 10, 2017, 3:21 PM MST for 10 counties in Colorado. It took effect at Jan 10, 2017, 9:00 PM MST. It was in force for 36 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: Jan 10, 2017, 3:21 PM MST (22:21 UTC)
In effect from: Jan 10, 2017, 9:00 PM MST
Expired: Jan 12, 2017, 8:53 AM MST
In force: 36 hr
Issued by: NWS Grand Junction, CO

Counties Delta County, CO, Eagle County, CO, Garfield County, CO, Gunnison County, CO, Mesa County, CO, Moffat County, CO, Montrose County, CO, Pitkin County, CO, Rio Blanco County, CO, Routt County, CO

The radar

The Grand Junction radar (KGJX), 64 km from the middle of the area, began a volume at 22:20 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 (KDEN), launched 12:00Z, 10.4 hours before the alert went out and 382 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: 1961 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 74 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 Grand Junction, CO wrote its last area forecast discussion before this winter storm warning went out at Jan 10, 11:04 AM MST, 4 hours 17 minutes earlier.

Area forecast discussion, Jan 10, 11:04 AM MST, 4 hours 17 minutes before

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Hazardous weather outlook, Jan 10, 2:53 AM MST, 12 hours 28 minutes before

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In the hours before

Local storm report, Jan 10, 10:02 AM MST, 5 hours 19 minutes before

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Local storm report, Jan 10, 10:18 AM MST, 5 hours 3 minutes before

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Local storm report, Jan 10, 10:22 AM MST, 4 hours 59 minutes before

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Local storm report, Jan 10, 10:26 AM MST, 4 hours 55 minutes before

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Local storm report, Jan 10, 1:17 PM MST, 2 hours 4 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 10, 7:11 AM MST	Dense Fog Advisory	GJT	Garfield, Mesa, Moffat, Rio Blanco, Routt	7 hr
Jan 10, 3:21 PM MST	Winter Weather Advisory	GJT	Archuleta, Delta, Dolores, Garfield, Gunnison, Hinsdale and 10 more	42 hr

Nearby

Winter Storm Warnings in Colorado, 2017 Every winter storm warning in 2017

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.