Alert archive / Montana / Winter Storm Watches in 2016

Winter Storm Watch 6, NWS Missoula, MT

December 10, 20167 counties in Montana

NWS Missoula, MT issued this winter storm watch at Dec 10, 2016, 2:34 PM MST for 7 counties in Montana. It took effect at Dec 11, 2016, 11:00 PM MST. It was in force for .

The area

The counties it named.

The facts

Issued: Dec 10, 2016, 2:34 PM MST (21:34 UTC)
In effect from: Dec 11, 2016, 11:00 PM MST
Expired: Dec 11, 2016, 4:06 PM MST
In force
Issued by: NWS Missoula, MT

Counties Flathead County, MT, Granite County, MT, Lake County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT

The radar

The Missoula radar (KMSX), 11 km from the middle of the area, began a volume at 21:33 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 194 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: 647 m above ground
0-6 km bulk shear: 83 kt
0-1 km storm-relative helicity: 218 m²/s²
0-3 km storm-relative helicity: 240 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 watch 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 winter storm watch went out at Dec 10, 3:22 AM MST, 11 hours 12 minutes earlier.

Area forecast discussion, Dec 10, 3:22 AM MST, 11 hours 12 minutes before

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In the hours before

Local storm report, Dec 10, 9:59 AM MST, 4 hours 35 minutes before

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Local storm report, Dec 10, 10:03 AM MST, 4 hours 31 minutes before

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Local storm report, Dec 10, 10:55 AM MST, 3 hours 39 minutes before

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Local storm report, Dec 10, 11:14 AM MST, 3 hours 20 minutes before

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Local storm report, Dec 10, 11:48 AM MST, 2 hours 46 minutes before

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Local storm report, Dec 10, 11:56 AM MST, 2 hours 38 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
Dec 10, 2:34 PM MST	Winter Weather Advisory	MSO	Flathead, Granite, Lincoln, Mineral, Missoula, Ravalli and 1 more	48 hr

Nearby

Winter Storm Watches in Montana, 2016 Every winter storm watch in 2016

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.