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|Snow Depth Totals||Yellowstone Weather Forecast|
Daily Winter Weather Report
Date: Sunday - 06 January 2013
|Station||Pres Temp||Max Temp||Min Temp||New Snow||Depth||Sky||Present Conditions|
|Bechler||8.0||8.0||-4.0||.07||SC||NNE @ 2 - 6 mph|
|Mammoth||13.5||14.9||12.1||.01||6.77||SC||SSW @ 7 - 12 mph|
|Old Faithful||-4.1||-4.1||-8.5||0||7.87||SC||Gust @ 1 mph|
|Thorofare||24.0||27.0||22.0||0||SC||NW @ 2 - 12 mph|
|Tower||-1.4||0.5||-4.8||0||7.17||SC||SSW @ 2 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: Partly cloudy in the morning then becoming mostly cloudy. Occasional flurries in the afternoon. Southwest winds around 15 mph late in the afternoon. Highs 21°F to 27°F.
Tonight: Cloudy. Occasional flurries. Lows 3°F to 9°F.
Monday: Cloudy. Slight chance of snow in the morning...then chance of snow in the afternoon. Southwest winds around 15 mph late in the afternoon. Chance of snow 30 percent. Highs 18°F to 24°F.
Monday Night: Cloudy with a 50 percent chance of snow. Southwest winds around 15 mph. Lows 10°F to 16°F.
Tuesday: Cloudy with a 50 percent chance of snow. Southwest winds around 15 mph. Highs 22°F to 28°F.
Tuesday Night: Cloudy with a 50 percent chance of snow. Lows 14°F to 20°F.
Wednesday: Mostly cloudy in the morning then becoming partly cloudy. A 20 percent chance of snow. Highs 26°F to 32°F.
Wednesday Night: Mostly cloudy with a 30 percent chance of snow. Lows 11°F to 17°F.
Thursday: Cloudy with a 50 percent chance of snow. Highs 19°F to 25°F.
Thursday Night: Colder. Mostly cloudy with a 30 percent chance of snow. Lows 0°F to 6°F.
Friday: Mostly cloudy with a 20 percent chance of snow. Highs 11°F to 17°F.
Friday Night: Mostly cloudy with a 20 percent chance of snow. Lows -5°F to 1°F.
Saturday: Mostly cloudy with a 20 percent chance of snow. Highs 5°F to 11°F.
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|* * * Snow Depth Totals as reported at SNOTELs * * *|
|Station||Depth (inches)||Station||Depth (inches)|
|Black Bear||67||Parker Peak||41|
|Blackwater||44||Snake River Station||29|
|Evening Star||45||Sylvan Road||21|
|Fisher Creek||60||Thumb Divide||33|
|Grassy Lake||45||Two Ocean Plateau||52|
|Lewis Lake Divide||56||West Yellowstone||18|
|Madison Plateau||42||Whiskey Creek||24|
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from the Gallatin National Forest Avalanche Center - January 06, 2013 - this report is by Eric Knoff. This advisory does not apply to operating ski areas.
There is no new snow to report, but a weak weather disturbance could deposit a trace to one inch of snow by this afternoon. This morning mountain temperatures are in the 20s Fahrenheit with the exception of the West Yellowstone area where temperatures are in the single digits Fahrenheit. Winds are blowing 15 to 30 out of the West-southwest with gusts in Hyalite reaching close to 50 mph. Today, temperatures will warm into the upper 20s to low 30s Fahrenheit and winds will continue to blow 15 to 30 out of the West-southwest. There is a chance of mountain snow showers through the day, but accumulations will be light. A stronger storm system is forecasted tomorrow night into Tuesday.
Snowpack and Avalanche Discussion:
The Bridger Range, Gallatin and Madison Ranges, the Lionhead area near West Yellowstone and Cooke City:
Taking time to assess snowpack and terrain can be difficult when generally safe avalanche conditions exist. However, assuming all slopes are safe during a low avalanche danger can be costly. This was demonstrated by the human triggered avalanche in the Hourglass chute north of Bridger Bowl on Thursday (video, video, photo1, photo2). This slide occurred on a slope where a wind slab formed over a thin layer of facets. While investigating the slide on Friday, both Mark and I felt this chute was one of the few places in the area with unstable snow.
Today, wind slabs resting over facets are the main avalanche concern. While generally green light conditions exist in most areas, a slab-facet combination can be found on isolated slopes in exposed, upper elevation terrain (photo). The challenge today will be figuring out which wind loaded slopes have buried weak layers and which do not. If you're not willing to dig a snowpit, then it's probably best to avoid the most dangerous slopes – the ones steeper than 35 degrees that drain over cliffs or into gullies or trees.
* * NEW WEAK LAYER * *
Recent dry weather has faceted the snow surface in many areas (video, article). Yesterday, I skied in the southern mountains near West Yellowstone and found a well-developed layer of near surface facets on all aspects and elevations. This layer has also been observed in the mountains near Bozeman and Big Sky as well as the Cooke City area. Currently, this layer does now pose a major avalanche threat, but once a slab of snow builds on top of it, we'll have the right recipe for avalanches.
Today, generally safe avalanche conditions exist 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
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