|Yellowstone National Park Winter Weather Links|
|Avalanche Report||Special Weather Info|
|Daily Winter Weather Report||Winter Road Report|
|Snow Depth Totals||Yellowstone Weather Forecast|
Daily Winter Weather Report
Date: Wednesday - 19 December 2012
|Station||Max Temp||Min Temp||Pres Temp||New Snow||Depth||Sky||Present Conditions|
|Mammoth||4.1||-5.0||-5.0||.02||6.56||SC||SSW@6 to 8 mph|
|Tower||-7.6||-18.7||-17.1||.08||6.97||SC||SSW@ 4 mph|
Back to Index
|Road Section||Status||Conditions||Public Access / Info|
|Gardiner to Mammoth||YR||Good||STR|
|Mammoth to Tower||YR||Good||STR|
|Tower to NE Entrance||YR||Good||STR|
|Beartooth Highway||CLOSED *||CLOSED *||CLOSED *|
|Canyon to Lake||Open||Rubber tracked oversnow concession vehicles|
|Firehole Canyon Drive||CLOSED||CLOSED||CLOSED|
|Grant to South Entrance||Open||Rubber tracked oversnow concession vehicles|
|Junction to Chief Joseph Hwy||CLOSED *||CLOSED *||CLOSED *|
|Lake to East Entrance||CLOSED||CLOSED||CLOSED|
|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 ********
Back to Index
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.
Back to Index
by the National Weather Service Riverton, WY
Today: Breezy. Mostly cloudy. Occasional flurries. Southwest winds 15 to 20 mph in the afternoon. Highs 5°F to 11°F. Lowest wind chill readings -16°F to -26°F in the morning.
Tonight: Breezy. Mostly cloudy with a 20 percent chance of snow. Southwest winds 15 to 20 mph with gusts to around 35 mph. Lows -5°F to 1°F. Wind chill readings -19°F to -29°F.
Thursday: Breezy. Not as cold. Partly cloudy. Southwest winds 15 to 20 mph. Highs 16°F to 22°F. Lowest wind chill readings -14°F to -24°F in the morning.
Thursday Night: Breezy. Partly cloudy. South winds 15 to 20 mph. Lows 3°F to 9°F.
Friday: Partly cloudy. A 20 percent chance of snow in the afternoon. Southwest winds around 15 mph. Highs 23°F to 29°F.
Friday Night: Partly cloudy. Lows 10°F to 16°F.
Saturday: Partly cloudy with a 20 percent chance of snow. Highs 24°F to 30°F.
Saturday Night: Mostly cloudy with a 20 percent chance of snow. Lows 13°F to 19°F.
Sunday: Breezy. Mostly cloudy with a 50 percent chance of snow. Highs 19°F to 25°F.
Sunday Night: Mostly cloudy with a 40 percent chance of snow. Lows 10°F to 16°F.
Monday: Mostly cloudy with a 50 percent chance of snow. Highs 16°F to 22°F.
Monday Night: Colder. Mostly cloudy with a 20 percent chance of snow. Lows -1°F to 5°F.
Christmas Day / Tuesday: Mostly cloudy in the morning then becoming partly cloudy. A 20 percent chance of snow. Highs 13°F to 21°F. * Merry Christmas *
Back to Index
|* * * Snow Depth Totals as reported at SNOTELs * * *|
|Station||Depth (inches)||Station||Depth (inches)|
|Black Bear||72||Parker Peak||43|
|Blackwater||51||Snake River Station||29|
|Evening Star||52||Sylvan Road||21|
|Fisher Creek||73||Thumb Divide||36|
|Grassy Lake||46||Two Ocean Plateau||62|
|Lewis Lake Divide||64||West Yellowstone||17|
|Madison Plateau||48||Whiskey Creek||23|
Back to Index
from the Gallatin National Forest Avalanche Center - December 19, 2012 - this report is by Doug Chabot. This advisory does not apply to operating ski areas.
Under clear skies mountain temperatures are zero to minus five Fahrenheit with light westerly winds. There's no new snow to report, the first time in 14 days. Today will be sunny with temperatures rising into the low teens Fahrenheit. Winds will blow 10 to 20 mph out of the west, but become stronger from the southwest tonight. A high pressure system will keep skies clear and dry for the next two days.
Snowpack and Avalanche Discussion:
The Bridger, Gallatin and Madison Ranges, the Lionhead area near West Yellowstone and mountains around Cooke City:
Finally, the snowpack gets a breather. A day without snowfall and strong winds has been rare; not that I'm complaining! Our snowpack is looking manageable so far. Weak layers of facets can be found near the ground on many slopes, but they are a problem on only a few. Our stability tests are showing increased strength and even more telling, with 14 days of snow load there have been hardly any avalanches. Even though steady and moderate snowfall has promoted stability, I still have two avalanche concerns today:
1. Wind-loaded slopes. Wind drifted, soft slab avalanches were triggered near ridgelines in the Bridger Range (photo). Wind drifts also naturally released in gullies near Cooke City (photo). Backcountry slopes with a wind-load were sensitive yesterday, but I expect them to be stubborn on lower-angled terrain today (less than 35 degrees).
2. Persistent weak layer. On a handful of slopes we are still getting unstable results in our snowpit tests due to poor snow structure (snowpit profile). There does not seem to be a common aspect associated with this, but a weak layer of angular facets is in the bottom one and a half feet of the snowpack. We have not seen, nor heard reports of recent signs of instability on this deep layer (i.e. collapsing, cracking or avalanches) outside of ski area explosives. However, crack propagation in our tests is a condition of instability and we do not throw these results out, we pay attention to them. The Extended Column Test (video tutorial) is a reliable way to test the snow.
Given the avalanche concerns associated with recent wind-loading along with a smattering of slopes that have poor snow structure, it's still possible to trigger avalanches today. For this reason I'm rating the Avalanche Danger MODERATE on all slopes.
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.
PHOTOS, SNOWPITS, and VIDEOS
1. For links to all 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 firstname.lastname@example.org or call: 406-587-6984.
For detailed Avalanche Terms utilized here, please see the Avalanche Glossary.
Back to Index
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
|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