Alert archive / Montana / Snow Advisories in 2005

Snow Advisory 20, NWS Missoula, MT

November 29, 20059 counties in Montana; Clearwater County, Idaho County, Idaho

NWS Missoula, MT issued this snow advisory at Nov 29, 2005, 2:52 PM MST for 9 counties in Montana; Clearwater County, Idaho County, Idaho. It took effect at Nov 29, 2005, 8:00 PM MST. It was in force for 24 hr.

The area

The counties it named.

The facts

Issued: Nov 29, 2005, 2:52 PM MST (21:52 UTC)
In effect from: Nov 29, 2005, 8:00 PM MST
Expired: Nov 30, 2005, 8:00 PM MST
In force: 24 hr
Issued by: NWS Missoula, MT

Counties Clearwater County, ID, Idaho County, ID, Deer Lodge County, MT, Flathead County, MT, Granite County, MT, Lake County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT, Silver Bow County, MT

The radar

The Missoula radar (KMSX), 30 km from the middle of the area, began a volume at 21:51 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

Boise Airport, ID (KBOI), launched 12:00Z, 9.9 hours before the alert went out and 394 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: 987 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 245 m²/s²
0-3 km storm-relative helicity: 328 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 snow advisory 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 snow advisory went out at Nov 29, 2:12 PM MST, 40 minutes earlier.

Area forecast discussion, Nov 29, 2:12 PM MST, 40 minutes before

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Hazardous weather outlook, Nov 29, 2:44 PM MST, 8 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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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, 9:07 PM MST	Winter Storm Warning	MSO	Granite, Mineral, Missoula, Ravalli, Sanders	31 hr
Nov 29, 2:52 PM MST	Winter Storm Watch	MSO	Deer Lodge, Flathead, Granite, Lake, Lincoln, Mineral and 5 more	30 hr

Nearby

Snow Advisories in Montana, 2005 Snow Advisories in Idaho, 2005 Every snow advisory 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.