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Daily Winter Weather Report
Date: Monday - 07 January 2013
|Station||Pres Temp||Max Temp||Min Temp||New Snow||Depth||Sky||Present Conditions|
|Bechler||4.0||4.0||-2.0||0||OC||N @ 2 mph|
|Mammoth||21.3||27.4||19.3||0||6.77||OC||S @ 6 - 9 mph|
|Old Faithful||11.8||16.5||5.6||0||7.87||OC||ESE @ 4 - 5 mph|
|Thorofare||16.0||19.0||16.0||0||OC||ENE @ 6 - 13 mph|
|Tower||4.2||10.4||2.7||.01||7.18||OC||E @ 1 mph|
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|Road Section||Status||Conditions||Public Access / Info|
|Gardiner to Mammoth||YR||STR|
|Mammoth to Tower||YR||STR|
|Tower to NE Entrance||YR||STR|
|Beartooth Highway||CLOSED *||CLOSED *||CLOSED *|
|Canyon to Lake||Open||Rubber tracked oversnow concession vehicles|
|Firehole Canyon Drive||Open||Rubber tracked oversnow concession vehicles|
|Grant to South Entrance||Open||Rubber tracked oversnow concession vehicles|
|Junction to Chief Joseph Hwy||CLOSED *||CLOSED *||CLOSED *|
|Lake to East Entrance||Open||Rubber tracked oversnow concession vehicles|
|Lake to West Thumb||Open||Rubber tracked oversnow concession vehicles|
|Madison to Old Faithful||Open||Rubber tracked oversnow concession vehicles|
|Madison to West Yellowstone||Open||Rubber tracked oversnow concession vehicles|
|Mammoth to Norris||Open||Rubber tracked oversnow concession vehicles|
|Norris to Canyon||Open||Rubber tracked oversnow concession vehicles|
|Norris to Madison||Open||Rubber tracked oversnow concession vehicles|
|Old Faithful to Grant||Open||Rubber tracked oversnow concession vehicles|
|Tower to Canyon||CLOSED *||CLOSED *||CLOSED *|
YR=Year Round / NR=No Restrictions / STA=Snow Tires Advised / STR=Snow Tires Required
* NOTE: CLOSED FOR THE SEASON.
# Poor road conditions - bare spots and melting snow - Restricted to Snowcoaches Only.
The park service plowing schedule for roads for the spring season.
******** FOR CURRENT ROAD INFORMATION PLEASE CALL 307-344-2117 ********
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Caution advised for snow falling off of building roofs. Park accordingly.
Dangerous avalanche conditions may already exist in many back country areas, please call the Recorded Avalanche Advisory 406-587-6981 for the most current conditions.
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by the National Weather Service Riverton, WY
Today: Breezy...cloudy. Occasional flurries in the morning...then chance of snow in the afternoon. Southwest winds 15 to 20 mph. Chance of snow 50 percent. Highs 17°F to 23°F.
Tonight: Breezy. Snow likely in the evening...then chance of snow after midnight. Areas of blowing snow through the night. Snow accumulation of 1 to 2 inches. Southwest winds 15 to 25 mph. Chance of snow 60 percent. Lows 10°F to 16°F.
Tuesday: Breezy. Cloudy with a 40 percent chance of snow. Areas of blowing snow. Southwest winds 15 to 20 mph. Highs 22°F to 28°F.
Tuesday Night: Breezy. Cloudy with a 40 percent chance of snow. Areas of blowing snow. Southwest winds 15 to 20 mph. Lows 13°F to 19°F.
Wednesday: Breezy. Mostly cloudy. Occasional flurries. Southwest winds 15 to 20 mph. Highs 27°F to 33°F.
Wednesday Night: Cloudy with a 40 percent chance of snow. Lows 13°F to 19°F.
Thursday: Cloudy with a 40 percent chance of snow. Highs 21°F to 27°F.
Thursday Night: Colder. Cloudy with a 40 percent chance of snow. Lows 3°F to 9°F.
Friday: Colder...cloudy. Chance of snow in the morning...then slight chance of snow in the afternoon. Chance of snow 30 percent. Highs 5°F to 11°F.
Friday Night: Colder. Mostly cloudy with a 20 percent chance of snow. Lows -1°F to 7°F.
Saturday: Mostly cloudy with a 20 percent chance of snow. Highs 3°F to 9°F.
Saturday Night: Mostly cloudy with a 20 percent chance of snow. Lows -5°F to 1°F.
Sunday: Not as cold. Mostly cloudy. Slight chance of snow in the morning...then chance of snow in the afternoon. Chance of snow 30 percent. Highs 12°F to 18°F.
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|* * * Snow Depth Totals as reported at SNOTELs * * *|
|Station||Depth (inches)||Station||Depth (inches)|
|Black Bear||68||Parker Peak||42|
|Blackwater||44||Snake River Station||31|
|Evening Star||46||Sylvan Road||21|
|Fisher Creek||61||Thumb Divide||33|
|Grassy Lake||45||Two Ocean Plateau||51|
|Lewis Lake Divide||56||West Yellowstone||18|
|Madison Plateau||43||Whiskey Creek||23|
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from the Gallatin National Forest Avalanche Center - January 07, 2013 - this report is by Eric Knoff. This advisory does not apply to operating ski areas.
Over the past 24 hours 1 to 2 inches of snow has fallen over much of the forecast area except for the Bridger Range which squeezed out a trace. Currently, temperatures are in the teens Fahrenheit under mostly cloudy skies and winds are blowing 15 to 30 out of West-northwest. Today, temperatures will warm into the mid to upper 20s Fahrenheit and winds will remain out of the west blowing 15 to 30 mph. A stronger storm system is scheduled to arrive this afternoon bringing an increased chance of snow to the mountains. 2 to 4 inches is likely by tomorrow morning with the exception of the Bridger Range which will see 1 to 2 inches.
Snowpack and Avalanche Discussion:
The Bridger Range, Gallatin and Madison Ranges, the Lionhead area near West Yellowstone and Cooke City:
Today, skiing or riding in avalanche terrain will be like approaching an unfamiliar dog - best bet is to assess the situation before getting up close and personal. Riding in avalanche terrain today will likely be uneventful - yet, there's always the possibility of a surprise bite.
In most cases, when you're surprised by avalanches, it means mistakes were made. Reducing the chance for surprises today will involve a quick but careful assessment of the snowpack. If the area you plan to ride feels slabby, punchy, hollow - or to sum it up 'variable' - you'll want to use extra caution when entering steeper slopes, especially those with high consequences. There may be a rogue wind slab resting over faceted snow, making human triggered avalanches possible (photo). The combination of a wind slab over facets produced a human triggered avalanche in the Hourglass chute north of Bridger Bowl on Thursday (video, video, photo).
If you find a slope where 3 to 5 inches of near surface facets and/or surface hoar is masquerading as powder, then you will likely enjoy a smooth and soft run avalanche free. I found soft riding near Hebgen Lake and in Bacond Rind on Saturday. Yesterday, skiers near Flathead Pass in the northern Bridger Range also found faceted snow on the surface and got ECT's to propagate about 30 cm's off the ground. Because deep weak layers are not widespread and it's been nearly two weeks since the last significant snowfall, triggering an avalanche on weak layers near the ground is unlikely.
* * Changing Conditions * *
Southwest Montana will be in a fairly active weather pattern for the next 4 to 5 days. Although snow totals will be less than a foot, winds are forecasted to increase Tuesday through Thursday. With a widespread and well developed weak layer on the surface it will not take much snow and wind to increase the avalanche hazard (photo, video). If you are heading into the backcountry pay close attention to changing conditions and never be afraid to alter the riding agenda.
Today, small avalanches are possible in isolated areas and the Avalanche Danger is rated LOW.
The next advisory tomorrow morning at 7:30 a.m. If you have any snowpack or avalanche observations, drop us a line at firstname.lastname@example.org or call us at: 406-587-6984.
EDUCATION, PHOTOS, SNOWPITS, and VIDEOS
1. For links to Articles, Education and (photos) and (videos) listed in the above report, please visit this Link.
If you have any snowpack or avalanche observations, drop them a line at email@example.com or call: 406-587-6984.
For detailed Avalanche Terms utilized here, please see the Avalanche Glossary.
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Back to the Yellowstone Daily Winter Reports or the Yellowstone Weather Page
Information provided by Yellowstone National Park, National Weather Service and Gallatin National Forest Avalanche Center
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