Alert archive / Montana / Snow Advisories in 2008

Snow Advisory 18, NWS Missoula, MT

February 9, 20087 counties in Montana; Clearwater County, Idaho County, Idaho

NWS Missoula, MT issued this snow advisory at Feb 9, 2008, 3:44 AM MST for 7 counties in Montana; Clearwater County, Idaho County, Idaho. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued
Feb 9, 2008, 3:44 AM MST (10:44 UTC)
Expired
Feb 9, 2008, 2:22 PM MST
In force
11 hr
Issued by
NWS Missoula, MT

Counties Clearwater County, ID, Idaho County, ID, Granite County, MT, Lake County, MT, Mineral County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT

The radar

The Missoula radar (KMSX), 41 km from the middle of the area, began a volume at 10:49 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.

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 Feb 9, 3:37 AM MST, 7 minutes earlier.

Area forecast discussion, Feb 9, 3:37 AM MST, 7 minutes before
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Hazardous weather outlook, Feb 8, 4:03 AM MST, 23 hours 41 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MISSOULA MT
403 AM MST FRI FEB 8 2008

IDZ005>007-MTZ001-004-090000-
NORTHERN CLEARWATER MOUNTAINS-SOUTHERN CLEARWATER MOUNTAINS-
OROFINO/GRANGEVILLE REGION-KOOTENAI/CABINET REGION-
LOWER CLARK FORK REGION-
403 AM MST FRI FEB 8 2008 /303 AM PST FRI FEB 8 2008/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
IDAHO...NORTHWEST MONTANA AND WEST CENTRAL MONTANA.

FOR THE LATEST INFORMATION ON WATCHES...WARNINGS AND ADVISORIES...GO
TO WEATHER.GOV/MISSOULA.

.DAY ONE...TODAY AND TONIGHT

LOWER ELEVATION SITES...MAINLY IN NORTH CENTRAL IDAHO...MAY SEE
AFTERNOON RAIN TODAY. THIS WILL ADD ADDITIONAL WEIGHT TO SNOW ATOP
BUILDINGS AND STRUCTURES.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SOUTHERLY WINDS ON SUNDAY WILL BRING WARMER AIR INTO THE AREA.
SNOW LEVELS WILL RISE CREATING THE POTENTIAL FOR RAIN THROUGH THE
BEGINNING OF THE WEEK. RAINFALL ON SNOW MAY OCCUR WITH SNOW LOADING
BEING THE MAIN CONCERN. ADDITIONAL WEIGHT WILL ADD STRESS TO
BUILDINGS AND STRUCTURES. ALSO...MOUNTAIN SNOWPACK MAY BECOME
UNSTABLE WITH THE ADDITIONAL WEIGHT.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

IDZ008>010-MTZ002-003-005>007-043-090000-
LOWER HELLS CANYON/SALMON RIVER REGION-WESTERN LEMHI COUNTY-
EASTERN LEMHI COUNTY-WEST GLACIER REGION-FLATHEAD/MISSION VALLEYS-
MISSOULA/BITTERROOT VALLEYS-BITTERROOT/SAPPHIRE MOUNTAINS-
BUTTE/BLACKFOOT REGION-POTOMAC/SEELEY LAKE REGION-
403 AM MST FRI FEB 8 2008 /303 AM PST FRI FEB 8 2008/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
IDAHO...NORTHWEST MONTANA AND WEST CENTRAL MONTANA.

.DAY ONE...TODAY AND TONIGHT

MOIST WESTERLY FLOW WILL BRING MAINLY MOUNTAIN SNOW TO THE REGION.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

ENERGETIC WESTERLY FLOW WILL CONTINUE TO BRING MAINLY MOUNTAIN
SNOW TO THE REGION INTO NEXT WEEK.

.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.

IssuedProductOfficeCountiesLasted
Feb 9, 2:22 PM MSTHeavy Snow WarningMSOMineral, Missoula, Sanders37 hr
Feb 9, 2:22 PM MSTSnow AdvisoryMSOFlathead, Granite, Lake, Mineral, Missoula, Powell and 2 more40 hr

Nearby

Snow Advisories in Montana, 2008Snow Advisories in Idaho, 2008Every snow advisory in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.