|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: Tuesday - 18 December 2012
|Station||Max Temp||Min Temp||Pres Temp||New Snow||Depth||Sky||Present Conditions|
|Mammoth||19.1||11.8||12.2||.08||6.54||C||S@6 to 7 mph|
|Old Faithful||13.5||-3.0||-3.0||.03||9.58||C||ENE@2 - 3 mph|
|Tower||18.3||5.1||5.6||.15||6.89||C||SW@ 3 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. Chance of snow in the morning...then slight chance of snow in the afternoon. Southwest winds 15 to 20 mph. Chance of snow 30 percent. Highs 9°F to 15°F. Wind chill readings -12°F to -22°F.
Tonight: Mostly cloudy with a 30 percent chance of snow. Southwest winds around 15 mph in the evening. Lows -4°F to -10°F. Wind chill readings -16°F to -26°F.
Wednesday: Mostly cloudy with a 30 percent chance of snow. Southwest winds around 15 mph in the afternoon. Highs 4°F to 10°F. Lowest wind chill readings -18°F to -28°F in the morning.
Wednesday Night: Breezy. Partly cloudy with a 20 percent chance of snow. Southwest winds 15 to 20 mph. Lows -3°F below to 3°F. Wind chill readings -15°F to -25°F.
Thursday: Breezy. Not as cold. Partly cloudy. Southwest winds 15 to 20 mph. Highs 16°F to 22°F. Lowest wind chill readings -13°F to -23°F in the morning.
Thursday Night: Partly cloudy in the evening then becoming mostly cloudy. A 20 percent chance of snow. Lows 8°F to 14°F. Lowest wind chill readings -13°F to -23°F in the evening.
Friday: Partly cloudy in the morning then becoming mostly cloudy. A 30 percent chance of snow. Highs 22°F to 28°F.
Friday Night: Partly cloudy with a 30 percent chance of snow. Lows 12°F to 18°F.
Saturday: Partly cloudy with a 20 percent chance of snow. Highs 23°F to 29°F.
Saturday Night: Partly cloudy in the evening then becoming mostly cloudy. A 20 percent chance of snow. Lows 14°F to 20°F.
Sunday: Mostly cloudy with a 40 percent chance of snow. Highs 23°F to 29°F.
Sunday Night: Mostly cloudy with a 40 percent chance of snow. Lows 11°F to 17°F.
Monday: Mostly cloudy with a 50 percent chance of snow. Highs 15°F to 21°F.
Back to Index
|* * * Snow Depth Totals as reported at SNOTELs * * *|
|Station||Depth (inches)||Station||Depth (inches)|
|Black Bear||75||Parker Peak||45|
|Blackwater||53||Snake River Station||29|
|Evening Star||54||Sylvan Road||22|
|Fisher Creek||79||Thumb Divide||39|
|Grassy Lake||49||Two Ocean Plateau||64|
|Lewis Lake Divide||66||West Yellowstone||19|
|Madison Plateau||52||Whiskey Creek||24|
Back to Index
from the Gallatin National Forest Avalanche Center - December 18, 2012 - this report is by Doug Chabot. This advisory does not apply to operating ski areas.
Since 5:00 a.m. yesterday morning the mountains picked up 3 to 4 inches of snow, with Cooke City getting eight inches. Winds are blowing 20 to 30 mph out of the west, a decrease from yesterday's gusts that hit 50 to 60 mph. Mountain temperatures are in the chilly single digits Fahrenheit. Today will be partly cloudy with only slight warming. Winds will continue out of the west, but become light. Scattered snow flurries will drop a trace to one inch of new snow by morning. Overall it's a cold, calm, winter day.
Snowpack and Avalanche Discussion:
The Bridger, Gallatin and Madison Ranges, the Lionhead area near West Yellowstone and mountains around Cooke City:
I found all the snow that was supposed to fall in Colorado. It's in Cooke City! Mark and I dug three pits to the ground, one as deep as seven feet. Our most shallow pit came in at four feet deep, which was also our weakest, but more about that in a second
Daily snowfall has blanketed southwest Montana over the last 20 days. Winds have been strong, gusty and created wind drifts, most notably at the higher elevation ridge lines where avalanches are likely to be triggered. Ski patrols on Lone Peak were able to trigger these wind-loaded slopes, and a sledder on Sunday noted natural avalanche activity from wind-loading on Buck Ridge south of Big Sky as well.
Talking to snowmobilers yesterday I condensed the entire advisory into one sentence: Besides wind-loaded slopes, the stability is pretty good. This assessment seems accurate for our entire area. I do not expect folks to trigger avalanches from a distance, nor do I expect a widespread avalanche cycle in the coming days. You can ride and ski most slopes without consequence. But nothing's perfect, and that goes for our snowpack too. The shallow pit Mark and I dug on the south side of Henderson Mountain illustrates this well. A layer of weak snow (facets) near the ground was breaking clean in our tests (ECTP21, Q1; snowpit). We've gotten similar results in the Madison, Gallatin and Bridger Ranges, but only on a handful of slopes. With the latest round of storms we have not seen natural or human triggered avalanches on this layer, but we will continue to monitor it. On Sunday, Moonlight Basin was able to trigger a wind-loaded slope with big explosives that stepped down to this weaker snow. The avalanche was large and reminds me that even relatively strong facets can still avalanche.
Mark and I stayed clear of wind-loaded slopes and skied lines that were not very exposed. Triggering wind drifts could step down to deeper layers on select, but not easily identifiable slopes. Dig and test. For today, the Avalanche Danger continues to be rated CONSIDERABLE on all wind-loaded terrain. All other slopes have a MODERATE 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.
PHOTOS, SNOWPITS, and VIDEOS
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