Alert archive / Montana / Winter Storm Warnings in 2010
Winter Storm Warning 34, NWS Missoula, MT
NWS Missoula, MT issued this winter storm warning at Dec 27, 2010, 5:17 PM MST for 9 counties in Montana; Clearwater County, Idaho County, Lemhi County, Idaho. It was in force for 60 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
- Dec 27, 2010, 5:17 PM MST (00:17 UTC)
- Expired
- Dec 30, 2010, 5:00 AM MST
- In force
- 60 hr
- Issued by
- NWS Missoula, MT
Counties Clearwater County, ID, Idaho County, ID, Lemhi County, ID, Flathead County, MT, Granite County, MT, Lake County, MT, Lincoln County, MT, Mineral County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT
The radar
The Missoula radar (KMSX), 36 km from the middle of the area, began a volume at 00:15 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 00:00Z, 0.3 hours before the alert went out and 172 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
- 906 m above ground
- 0-6 km bulk shear
- 75 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 148 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 Missoula, MT wrote its last area forecast discussion before this winter storm warning went out at Dec 27, 2:35 PM MST, 2 hours 42 minutes earlier.
Area forecast discussion, Dec 27, 2:35 PM MST, 2 hours 42 minutes before
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</html>Hazardous weather outlook, Dec 27, 3:35 PM MST, 1 hour 42 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MISSOULA MT 335 PM MST MON DEC 27 2010 IDZ007-008-281200- OROFINO/GRANGEVILLE REGION-LOWER HELLS CANYON/SALMON RIVER REGION- 235 PM PST MON DEC 27 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL IDAHO. .DAY ONE...THIS AFTERNOON AND TONIGHT SNOW WILL CONTINUE TO DEVELOP ACROSS PORTIONS OF NORTH CENTRAL IDAHO TONIGHT...WITH LIGHT SNOW ACCUMULATIONS EXPECTED IN VALLEY LOCATIONS AND MODERATE ACCUMULATION OVER THE HIGHER TERRAIN. HAZARDOUS DRIVING CONDITIONS WILL EXIST DURING THIS TIME...PARTICULARLY AT HIGH ELEVATIONS AND OVER MOUNTAIN PASSES. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY A STRONGER WINTER STORM IS EXPECTED WEDNESDAY AND WEDNESDAY NIGHT OVER NORTH CENTRAL IDAHO. STORM TOTAL SNOW ACCUMULATIONS OF 15 TO 20 INCHES OVER HIGHER TERRAIN...AND 5 TO 10 INCHES FOR VALLEYS AND ELEVATIONS ABOVE 2000 FEET...ARE ANTICIPATED. HAZARDOUS DRIVING CONDITIONS ARE PROBABLE DURING THIS TIME. THURSDAY THROUGH SATURDAY...A COLD AIRMASS WILL MOVE WEST OF THE CONTINENTAL DIVIDE AND SPREAD ACROSS NORTH CENTRAL IDAHO. THIS WILL DROP DAYTIME HIGHS INTO THE MID TEENS AND OVER NIGHT LOWS TO THE SINGLE DIGITS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 28, 10:43 AM MST | Winter Weather Advisory | MSO | Deer Lodge, Granite, Missoula, Powell, Ravalli, Silver Bow | 46 hr |
| Dec 28, 2:55 AM MST | Wind Advisory | MSO | Clearwater, Idaho | 8 hr |
Nearby
Winter Storm Warnings in Montana, 2010Winter Storm Warnings in Idaho, 2010Every winter storm warning in 2010
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.