Alert archive / Montana / Heavy Snow Warnings in 2005

Heavy Snow Warning 8, NWS Missoula, MT

November 28, 20057 counties in Montana; Clearwater County, Idaho County, Idaho

NWS Missoula, MT issued this heavy snow warning at Nov 28, 2005, 2:37 PM MST for 7 counties in Montana; Clearwater County, Idaho County, Idaho. It took effect at Nov 29, 2005, 5:00 AM MST. It was in force for 23 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 28, 2005, 2:37 PM MST (21:37 UTC)
In effect from: Nov 29, 2005, 5:00 AM MST
Expired: Nov 30, 2005, 3:53 AM MST
In force: 23 hr
Issued by: NWS Missoula, MT

Counties Clearwater County, ID, Idaho County, ID, Flathead County, MT, Granite County, MT, Lincoln County, MT, Mineral County, MT, Missoula County, MT, Ravalli County, MT, Sanders County, MT

The radar

The Missoula radar (KMSX), 53 km from the middle of the area, began a volume at 21:37 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

Spokane, WA (KOTX), launched 12:00Z, 9.6 hours before the alert went out and 146 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: 526 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 47 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 heavy snow warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Missoula, MT wrote its last area forecast discussion before this heavy snow warning went out at Nov 28, 11:07 AM MST, 3 hours 30 minutes earlier.

Area forecast discussion, Nov 28, 11:07 AM MST, 3 hours 30 minutes before

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Hazardous weather outlook, Nov 28, 2:14 AM MST, 12 hours 23 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 28, 2:15 AM MST	Winter Storm Watch	MSO	Flathead, Granite, Lake, Lincoln, Mineral, Missoula and 3 more	37 hr
Nov 28, 2:37 PM MST	Snow Advisory	MSO	Flathead, Lake, Sanders	13 hr
Nov 28, 2:33 PM MST	Wind Advisory	MSO	Clearwater, Idaho	17 hr

Nearby

Heavy Snow Warnings in Montana, 2005 Heavy Snow Warnings in Idaho, 2005 Every heavy snow warning in 2005

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.