Alert archive / Colorado / Winter Storm Warnings in 2011
Winter Storm Warning 3, NWS Grand Junction, CO
NWS Grand Junction, CO issued this winter storm warning at Feb 1, 2011, 8:07 AM MST for 5 counties in Colorado. It was in force for 10 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
- Feb 1, 2011, 8:07 AM MST (15:07 UTC)
- Expired
- Feb 1, 2011, 6:00 PM MST
- In force
- 10 hr
- Issued by
- NWS Grand Junction, CO
Counties Gunnison County, CO, Hinsdale County, CO, Montrose County, CO, Ouray County, CO, San Miguel County, CO
The radar
The Grand Junction radar (KGJX), 103 km from the middle of the area, began a volume at 15:14 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, 3.1 hours before the alert went out and 432 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 720 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- -79 m²/s²
- 0-3 km storm-relative helicity
- -65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Feb 1, 4:59 AM MST, 3 hours 8 minutes earlier.
Area forecast discussion, Feb 1, 4:59 AM MST, 3 hours 8 minutes before
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</html>Hazardous weather outlook, Feb 1, 4:56 AM MST, 3 hours 11 minutes before
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Local storm report, Feb 1, 7:06 AM MST, 1 hour 1 minute before
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</html>Local storm report, Feb 1, 7:10 AM MST, 57 minutes before
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</html>Local storm report, Feb 1, 7:15 AM MST, 52 minutes before
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Winter Storm Warnings in Colorado, 2011Every winter storm warning in 2011
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.