Daily Winter Weather Report
Date: Friday - 27 January 2012
|Station||Max Temp||Min Temp||Pres Temp||New Snow||Depth||Sky||Present Conditions|
|East Entrance||30||4||6||1||32||SC||Light west wind|
|Tower||38||15||16||.25||15||OC||S@10-12mph / Light Snow|
|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
Rest Of Today...Partly cloudy. Highs 14°F to 20°F. West winds around 15 mph late in the afternoon.
Tonight...Breezy. Partly cloudy with a 20 percent chance of snow. Lows 0°F to 6°F. Southwest winds 15 to 20 mph. Wind chill readings -10°F to -20°F.
Saturday...Breezy. Partly cloudy in the morning then becoming mostly cloudy. A 20 percent chance of snow. Highs 18°F to 24°F. Southwest winds 15 to 20 mph. Lowest wind chill readings -10°F to -20°F in the morning.
Saturday Night...Breezy. Mostly cloudy with a 20 percent chance of snow. Lows 7°F to 13°F. Southwest winds 15 to 20 mph.
Sunday...Mostly cloudy. Chance of snow in the morning...then slight chance of snow in the afternoon. Highs 24°F to 30°F. Southwest winds around 15 mph. Chance of snow 30 percent.
Sunday Night...Mostly cloudy with a 20 percent chance of snow. Lows 12°F to 18°F.
Monday...Mostly cloudy with a 50 percent chance of snow. Highs 25°F to 31°F.
Monday Night...Mostly cloudy with chance of snow in the evening... Then partly cloudy with slight chance of snow after midnight. Lows 9°F to 15°F. Chance of snow 40 percent.
Tuesday...Partly cloudy with a 20 percent chance of snow. Highs 24°F to 30°F.
Tuesday Night...Mostly cloudy in the evening then becoming partly cloudy. A 40 percent chance of snow. Lows 10°F to 16°F.
Wednesday...Mostly cloudy with a 40 percent chance of snow. Highs 25°F to 31°F.
Wednesday Night...Partly cloudy with a 20 percent chance of snow. Lows 10°F to 16°F.
Thursday...Partly cloudy with a 20 percent chance of snow. Highs 26°F to 32°F.
|* * * Snow Depth Totals as reported at SNOTELs * * *|
|Station||Depth (inches)||Station||Depth (inches)|
|Black Bear||85||Parker Peak||59|
|Blackwater||62||Snake River Station||59|
|Evening Star||73||Sylvan Road||38|
|Fisher Creek||84||Thumb Divide||45|
|Grassy Lake||84||Two Ocean Plateau||87|
|Lewis Lake Divide||76||West Yellowstone||33|
|Madison Plateau||56||Whiskey Creek||43|
from the Gallatin National Forest Avalanche Center - 27 January 2012 - 7:30 am - this report is by Mark Staples. This advisory does not apply to operating ski areas.
Since yesterday morning, 1 to 2 inches of snow fell near Big Sky and the Taylor Fork. 4 to 5 inches fell near Cooke City and West Yellowstone. Temperatures this morning dropped into the single digits Fahrenheit with winds blowing 20-40 mph from the West and Northwest. Today skies will clear, temperatures will warm into the teens Fahrenheit, and winds will blow 15-30 mph from the West and Northwest. Tomorrow should be warmer and the next chance of snow may not come until early next week.
Snowpack and Avalanche Discussion:
The southern Madison and southern Gallatin Ranges, and the Lionhead area near West Yellowstone:
The weakest and most unstable snowpack exists in the Lionhead area near West Yellowstone and the southern Madison Range. In the last 12 days, the Madison Plateau SNOTEL recorded 4.6 inches of snow water equivalent and the Carrot Basin SNOTEL recorded 2.7 inches. The weak snowpack will be evident when you step off your sled or out of your skis and sink to the ground. Riding at Lionhead on Tuesday, I saw many avalanches. Some occurred after only 2 inches of snow and wind. With 5 inches of snow yesterday and continued strong winds, there will be more avalanches. Some slopes may avalanche again, and it is still possible to trigger slopes from flat terrain underneath them. For today, wind loaded slopes steeper than 35 degrees have a HIGH Avalanche Danger. All other slopes have a CONSIDERABLE Avalanche Danger.
The mountains around Cooke City:
The mountains near Cooke City have received 6 inches of snow water equivalent over the last 12 days. This amount of water is about 60 inches of snow, which has added significant stress to the snowpack. When you add enough stress, things break. Many avalanches near Cooke City broke on a weak layer of facets near an ice crust on South facing slopes. During the last 2 days Doug consistently found this layer buried 2 to 3 feet deep, and I found it in the Sheep Creek drainage 2 weeks ago. North facing slopes are more variable. Some have a relatively strong snowpack. Others have weak facets near the ground. As snowfall buries these facets deeper, it will be harder to trigger an avalanche, but when you do, it will be big and deadly. Don't be fooled by tracks on a slope – these do not indicate stability. Today human triggered avalanches are likely and the Avalanche Danger is CONSIDERABLE.
The Northern Madison Range:
Although the mountains near Big Sky have not received as much snow as areas further south, snow has been steadily falling and adding up to 2.3 inches of snow water equivalent during the last 12 days. Yesterday on Yellow Mountain on southerly aspects, Eric and I found a layer of facets on top of an ice crust buried about 12 inches deep. On northerly aspects there was no ice crust but plenty of facets. We triggered an avalanche in a pocket with a heavy wind load that broke on facets near the ground. Snowfall has not been enough to push facets in the snowpack to their breaking point, but very strong winds during the last few days have loaded some slopes to their breaking point. It is on these slopes where you will get an avalanche. For today, wind loaded slopes steeper than 35 degrees have a CONSIDERABLE avalanche danger. Other slopes have a MODERATE Avalanche Danger.
The Bridger and northern Gallatin Ranges:
With less snow, the mountains near Bozeman have had less avalanches than other areas, but these mountains received very strong winds during the last 2 days leaving few slopes unaffected. Skiers on Mount Blackmore found big drifts well below treeline. The Bridger Range has a very weak snowpack. Triggering a wind slab will create an avalanche that will step down and avalanche on deeper layers in the snowpack. In Hyalite Canyon, the snowpack is mostly strong and avalanches will be confined to fresh wind slabs. For today with heightened avalanche conditions on specific terrain features, the Avalanche Danger is MODERATE.
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.
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
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 email@example.com 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