Daily Winter Weather Report
Date: Sunday - 05 February 2012
|Station||Max Temp||Min Temp||Pres Temp||New Snow||Depth||Sky||Present Conditions|
|Road Section||Status||Conditions||Public Access / Info|
|Gardiner to Mammoth||YR||Snow Tires Required|
|Mammoth to Tower||YR||Snow Tires Required|
|Tower to NE Entrance||YR||Snow Tires Required|
|Beartooth Highway||CLOSED *||CLOSED *||CLOSED *|
|Canyon to Lake||Open||All oversnow vehicles|
|Canyon to Tower||CLOSED *||CLOSED *||CLOSED *|
|Firehole Canyon Drive||CLOSED||CLOSED||CLOSED|
|Grant to South Entrance||Open||Good||All oversnow vehicles|
|Junction to Chief Joseph Hwy||CLOSED *||CLOSED *||CLOSED *|
|Lake to East Entrance||Open||All oversnow vehicles|
|Lake to West Thumb||Open||All oversnow vehicles|
|Madison to Old Faithful||Open||Good||All oversnow vehicles|
|Madison to West Yellowstone||Open||Good||All oversnow vehicles|
|Mammoth to Norris||Open||Good||All oversnow vehicles|
|Norris to Canyon||Open||Good||All oversnow vehicles|
|Norris to Madison||Open||Fair||All oversnow vehicles|
|Old Faithful to Grant||Open||All oversnow vehicles|
YR = Open Year Round / NR = No Restrictions
* NOTE: CLOSED FOR THE WINTER 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 ********
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.
Caution advised for snow falling off of building roofs. Park accordingly.
* * Be prepared for bitter cold (sub-zero) temperatures (some of the temperatures below DO NOT have the Wind Chill factored in). See NWS Weather Forecast below for detailed information. * *
by the National Weather Service Riverton, Wyoming
Today...Sunny. Patchy fog in the morning. Highs 28°F to 34°F.
Tonight...Partly cloudy in the evening then clearing. Lows 2°F to 8°F.
Monday...Partly cloudy. Highs 24°F to 30°F.
Monday Night...Partly cloudy. Lows 0°F to 6°F.
Tuesday...Partly cloudy in the morning then clearing. Highs 24°F to 30°F.
Tuesday Night...Mostly clear. Lows 4°F to 10°F.
Wednesday...Partly cloudy. Highs 24°F to 30°F.
Wednesday Night...Partly cloudy with a 20 percent chance of snow. Lows 8°F to 14°F.
Thursday...Partly cloudy with a 20 percent chance of snow. Highs 24°F to 30°F.
Thursday Night...Partly cloudy with a 20 percent chance of snow. Lows 4°F to 10°F.
Friday...Partly cloudy. Highs 27°F to 33°F.
Friday Night...Partly cloudy. Lows 10°F to 16°F.
Saturday...Partly cloudy with a 20 percent chance of snow. Highs 27°F to 33°F.
|* * * Snow Depth Totals as reported at SNOTELs * * *|
|Station||Depth (inches)||Station||Depth (inches)|
|Black Bear||80||Parker Peak||57|
|Blackwater||61||Snake River Station||51|
|Evening Star||71||Sylvan Road||36|
|Fisher Creek||81||Thumb Divide||43|
|Grassy Lake||75||Two Ocean Plateau||81|
|Lewis Lake Divide||70||West Yellowstone||31|
|Madison Plateau||51||Whiskey Creek||40|
from the Gallatin National Forest Avalanche Center - 05 February 2012 - 7:30 am - this report is by Eric Knoff. This advisory does not apply to operating ski areas.
Southwest Montana remains under a dominating ridge of high pressure. Currently skies are clear and temperatures are in the mid teens to low twenties with the exception of a few areas near West Yellowstone and Cooke City which are in the single digits. Winds are light out of the W blowing 5-15 mph. Today will be a near carbon copy of yesterday. Plenty of sunshine will allow mountain temperatures to climb into the mid to upper 30s and winds will stay light out of west at 5-15 mph.
Snowpack and Avalanche Discussion:
The southern Madison and southern Gallatin Ranges, the Lionhead area near West Yellowstone and the mountains around Cooke City:
The mountains around Cooke City have the deepest snowpack out in our forecast area. Currently, the Fisher Creek Snotel site is recording a settled base depth of 81 inches. The top 3 to 4 feet consist of a dense slab, which in many areas it is resting over weaker snow near the ground. This is a recipe for deep slab instability, a scenario that is tricky and dangerous for many reasons.
On Thursday, I triggered a large slide on the south face of Mount Abundance. Southerly aspects have the shallowest and weakest snowpack in the area, making them more susceptible to human triggered avalanches. However, a skier up Republic Creek got cracking and collapsing on multiple aspects yesterday, obvious signs of instability. In conditions like these following the three rules of backcountry travel is imperative - everyone carries rescue gear and knows how to use it, only expose one rider at a time and always be watching your partner from a safe location.
The Taylor Fork area and mountains around West Yellowstone have a settled base depth of around 50 inches. The snowpack in these areas is shallower and weaker than the pack around Cooke City and is having difficulty supporting any type of load. Yesterday, riders in the Lioinhead observed a large natural slide off the Lionhead Ridge, the result of a recent wind load. Due to the unstable nature of the pack, steep and wind loaded slopes should be avoided.
Today, a weak snow structure makes human triggered avalanches likely and Avalanche Danger is rated CONSIDERABLE.
The Bridger Range and northern Madison Range:
Yesterday, I took part in the GVSA Porker Ride on Buck Ridge. The weather was great and so were the hot dogs. During my ride I observed a slide on an east facing slope below a ridgline. The slide failed on weak snow near the ground and appeared to be the result of a wind load. In the northern Madison Range, wind loaded slopes are the primary avalanche concern.
The Bridger Range has a similar set up. Dense slabs resting over weak snow near the ground is providing a structure capable of producing avalanches. Areas where the snowpack is thinner, specifically rocky terrain below ridgelines will present the greatest risk for triggering a slide.
Today, heightened avalanche conditions exist on specific terrain features and the Avalanche Danger is rated MODERATE.
The northern Gallatin Range:
Over the past week numerous observations from the northern Gallatin Rang have described a strong and stable snowpack. Skiers and riders are continuously venturing into steeper terrain without incident - an encouraging sign. However, avalanches remain possible, especially on steep-upper elevation slopes.
If you are heading into avalanche terrain, always consider the consequence of a slide. Conditions like these are when avalanches have a tendency to catch people off guard.
Today, on slopes steeper than 35 degrees human triggered avalanches are possible and the Avalanche Danger is rated MODERATE. Less steep slopes have a LOW Avalanche Danger.
The next advisory tomorrow morning at 7:30 a.m. If you have any snowpack or avalanche observations, drop us a line at email@example.com or call us at: 406-587-6984.
The Friends of the Avalanche Center installed a Beacon Training Park outside West Yellowstone. It's located south of town on the main snowmobile trail. Stop by and do a quick practice before heading off into the mountains!
EDUCATION, EVENTS, PHOTOS, SNOWPITS, and VIDEOS
February 8: 4th Annual Montana Ale Works Wine Dinner
Come join us for a wonderful, social evening at Montana Ale Works. Menu and ticket information is here: http://bit.ly/wEg01j.
10th Annual King and Queen of the Ridge
The 10th Annual King and Queen of the Ridge Hike/Ski-a-thon fundraiser is Saturday, Feb 11th. The event supports avalanche education in southwest Montana. Collect pledges for one, two or the most Ridge hikes you can do in the five hours of competition. 100% of the proceeds go to the Friends of Gallatin National Forest Avalanche Center. Kids and families are encouraged to hike too! More Information / Registration Form.
3. Check out all our education programs, Click Here.
Information provided by Doug Chabot, Mark Staples, and Eric Knoff from the Gallatin National Forest Avalanche Center. For Events and Education, or Photos and Videos, please visit the Avalanche Centers Website!
If you have any snowpack or avalanche observations, drop them a line at firstname.lastname@example.org or call: 406-587-6984.
For detailed Avalanche Terms utilized here, please see the Avalanche Glossary.
Information provided by Yellowstone National Park, National Weather Service and Gallatin National Forest Avalanche Center
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