Alert archive / Montana / Blizzard Warnings in 2009

Blizzard Warning 1, NWS Glasgow, MT

January 11, 20094 counties in Montana

NWS Glasgow, MT issued this blizzard warning at Jan 11, 2009, 4:07 AM MST for 4 counties in Montana. It took effect at Jan 11, 2009, 6:00 PM MST. 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: Jan 11, 2009, 4:07 AM MST (11:07 UTC)
In effect from: Jan 11, 2009, 6:00 PM MST
Expired: Jan 12, 2009, 3:52 AM MST
In force: 10 hr
Issued by: NWS Glasgow, MT

Counties Daniels County, MT, Roosevelt County, MT, Sheridan County, MT, Valley County, MT

The radar

The Glasgow radar (KGGW), 95 km from the middle of the area, began a volume at 11:11 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

Great_falls, MT (KTFX), launched 00:00Z, 11.1 hours before the alert went out and 403 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: 1543 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 275 m²/s²
0-3 km storm-relative helicity: 348 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 blizzard warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Glasgow, MT wrote its last area forecast discussion before this blizzard warning went out at Jan 10, 8:39 PM MST, 7 hours 28 minutes earlier.

Area forecast discussion, Jan 10, 8:39 PM MST, 7 hours 28 minutes before

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The office that day

Everything else NWS Glasgow, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 11, 3:01 PM MST	High Wind Warning	GGW	Dawson, Garfield, McCone, Phillips, Prairie, Richland and 2 more	19 hr

Nearby

Blizzard Warnings in Montana, 2009 Every blizzard 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.