Daily Winter Weather Report
Date: Tuesday - 31 January 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...Mostly cloudy with a 20 percent chance of snow. Highs 23°F to 29°F. Southwest winds around 15 mph.
Tonight...Partly cloudy in the evening then becoming mostly cloudy. A 20 percent chance of snow. Lows 9°F to 15°F. Southwest winds around 15 mph.
Wednesday...Cloudy. Slight chance of snow in the morning...then chance of snow in the afternoon. Highs 24°F to 30°F. Southwest winds around 15 mph in the late morning and early afternoon. Chance of snow 50 percent.
Wednesday Night...Colder. Snow in the evening...then chance of snow after midnight. Snow accumulation of 3 to 4 inches. Lows 2°F to 8°F. Chance of snow 80 percent.
Thursday...Partly cloudy. Slight chance of snow in the morning... Then isolated snow showers in the afternoon. Highs 21°F to 27°F. Chance of snow 20 percent.
Thursday Night...Mostly clear. Lows -2°F to 6°F.
Friday...Mostly sunny. Patchy fog in the morning. Highs 22°F to 28°F.
Friday Night...Mostly clear. Areas of fog after midnight. Lows 0°F to 8°F.
Saturday...Sunny. Areas of fog in the morning. Highs 27°F to 33°F.
Saturday Night...Clear. Areas of fog after midnight. Lows 2°F to 10°F.
Sunday...Sunny. Areas of fog in the morning. Highs 30°F to 36°F.
Sunday Night...Mostly clear. Areas of fog after midnight. Lows 6°F to 14°F.
Monday...Mostly sunny. Areas of fog in the morning. Highs 29°F to 35°F.
|* * * Snow Depth Totals as reported at SNOTELs * * *|
|Station||Depth (inches)||Station||Depth (inches)|
|Black Bear||83||Parker Peak||58|
|Blackwater||61||Snake River Station||53|
|Evening Star||75||Sylvan Road||37|
|Fisher Creek||86||Thumb Divide||45|
|Grassy Lake||77||Two Ocean Plateau||84|
|Lewis Lake Divide||73||West Yellowstone||32|
|Madison Plateau||54||Whiskey Creek||41|
from the Gallatin National Forest Avalanche Center - 31 January 2012 - 7:30 am - this report is by Doug Chabot. This advisory does not apply to operating ski areas.
The northern mountains picked up 1 to 2 inches of new snow with the southern areas getting 2 to 3 inches and Cooke City squeezing out 4 to 5 inches. This system came in with 20-40 mph westerly winds and temperatures in the high teens Fahrenheit. This morning ridgetop winds have lessened to 15-30 mph with temperatures in the low teens Fahrenheit. Today will be a mixed bag of clouds and sun. Tomorrow evening looks to be our next chance of snowfall with dry conditions through the weekend.
Snowpack and Avalanche Discussion:
The mountains around Cooke City:
Cooke City has received snow showers 11 out of the last 14 days. After a measly four inch snowfall on Saturday night, natural avalanches were seen on Sunday. With 4 to 5 inches yesterday I'm expecting additional activity on a layer of small-grained facets buried 2 to 3 feet under the surface. On south-facing slopes these weak grains are sitting on an ice crust and are unstable. On other aspects this layer may not be on a crust, but no matter, increased loading from winds are creating natural slides. During my visit last week I did not venture onto avalanche terrain, nor would I today. Since then, a foot of new snow and strong winds have kept the danger elevated. Today, the Avalanche Danger remains HIGH on all wind-loaded slopes. All other slopes have a CONSIDERABLE Avalanche Danger.
The southern Madison and southern Gallatin Ranges, and the Lionhead area near West Yellowstone:
The mountains south of Big Sky to West Yellowstone have a weak snow structure. A few inches of new snow, especially with wind, is keeping the snowpack unstable. In the last 48 hours skiers reported whumphing and cracking of slopes near Hebgen Lake and also around Bacon Rind. A poor foundation of large-grained sugary facets is straining to hold up the thin winter snowpack. Given the new snow, wind and recent signs of instability, I'm rating the Avalanche Danger CONSIDERABLE on all slopes.
The Bridger Range and northern Madison Range:
Eric was in the northern Bridger Range yesterday working with the NRCS crew to fix the Brackett Creek SNOTEL site. He reported a couple inches of new snow falling. These few inches of new snow will be blown into thicker slabs at the ridgelines and be easy to trigger. The snowpack here is weak. In the northern Madison Range the snowpack is deeper than the Bridger's, however, the stability is similar. Mark and Eric triggered a slide on Yellow Mountain last week on buried facets. Over the weekend skiers north of Big Sky stuck to conservative lines even after getting good stability test results. They could not ignore the poor snow structure and recent activity. For today the primary avalanche concern is on wind-loaded slopes which have a CONSIDERABLE Avalanche Danger. All other slopes are rated MODERATE Avalanche Danger.
The northern Gallatin Range:
The northern Gallatin Range wins the beauty contest for the best looking snowpack in our area. Unfortunately for us the field of competitors is pretty ugly, so it was an easy win. The Hyalite drainage has deep snow that's lacking a widespread weak layer. Thinner zones like Mount Ellis have faceted snow, but without a large load these slopes are not under much stress. Eric toured there on Friday and noted the danger of hitting a buried tree stump concerned him more than triggering an avalanche. For today, the Avalanche Danger is rated MODERATE on any wind-loaded slope and also on any slope steeper than 35 degrees. All other 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
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
|I n d e x|
|Adult Programs||Entrances||Old Faithful Live WebCam||Visitor Stats|
|Amphibians||Entrance Fees||Pets||Volcano Observatory|
|Animals||Fall Closure||Phone Numbers||Waterfalls|
|Bear Management||Fishing Fees||Ranger Led Activities||WebCams|
|Bear Sightings||Fishing Regulations||Reptiles||Wildflowers|
|Biking||Getting Here||Reunions||Winter Closing|
|Boating||Hiking||Rivers, Creeks & Streams||Winter Opening|
|Books||History||Roads||Winter Weather Reports|
|Butterflies||Junior Ranger Program||Schedule||Wolf Project|
|Camping||Lakes||Search Page||Wolf Sightings|
|Campground Maps||Location||Spring Opening||Wolverine Help|
|Challenges||Lodging||Star Talks||Yellowstone ~ the Name|
|Chat Page||Lynx Help||Trip Planner pdf||Young Scientist|
|Clinics / Medical||Mammal List||Trip Reports||Youth Conservation Corps|
|Yellowstone National Park WebCams|
|Old Faithful Live||All Old Faithful||Old Faithful Static||Old Faithful VC||North Entrance||Mt Washburn||Mammoth||YVO WebCam|
|Rexburg Idaho WebCams|
|♦ Rexburg, Idaho WebCams ♦|
|Yellowstone Area Highway WebCams|
|Alpine Junction Hwy 89 (South)||Monida Pass I-15 (North)|
|Bozeman Pass I-90 (North)||Osborne Bridge Hwy 20 (West)|
|Henry's Lake North Hwy 20 (West)||Raynolds Pass MT 87 (North or West)|
|Henry's Lake South Hwy 20 (West)||Teton Pass WY 22 (South)|
|State Road Reports|
|Gardiner, Montana||Silver Gate, Montana||West Yellowstone, Montana||Cooke City, Montana|
|Livingston, Montana||Cody, Wyoming||Jackson Hole, Wyoming||Yellowstone National Park|
|The Great Outdoors Net||Great Outdoor Recreational Places|
|Gardiner, Montana||World Humanity|
by John William Uhler
Back to: Yellowstone Up Close and Personal