Daily Winter Weather Report
Date: Friday - 15 February 2013
|Yellowstone National Park Winter Weather Links|
|Avalanche Advisory||Special Weather Info|
|Daily Winter Weather Report||Winter Road Report|
|Snow Depth Totals||Yellowstone Weather Forecast|
|Station||Pres Temp||Max Temp||Min Temp||New Snow||Depth||Sky||Present Conditions|
|Bechler||20.0||22.0||20.0||.11||SC||N @ 2 mph|
|Mammoth||22.2||24.8||20.3||.02||9||SC||SSW @ 6 - 7 mph|
|Old Faithful||4.4||15.8||3.5||0||24||SC||SSE @ 2 - 3 mph|
|Thorofare||12.0||15.0||12.0||0||SC||NW @ 8 - 11 mph|
|Tower||19.2||24.8||19.2||0||SC||NNW @ 2 mph|
* * Live Weather via All Yellowstone WebCams * *
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|Road Section||Status||Conditions||Public Access / Info|
|Gardiner, MT to Mammoth||Open *||Good||STR - Not Maintained from 4:30 PM to 6:00 AM|
|Mammoth to Tower||Open *||Snow Packed/Icy||STR - Not Maintained from 4:30 PM to 6:00 AM|
|Tower to NE Entrance||Open *||Snow Packed/Icy||STR - Not Maintained from 4:30 PM to 6:00 AM|
|Beartooth Highway ♦||CLOSED ♦||CLOSED ♦||CLOSED ♦|
|Canyon to Lake||Open||Poor||Rubber tracked oversnow concession vehicles|
|Canyon to Tower ♦||CLOSED ♦||CLOSED ♦||CLOSED ♦ (over Dunraven Pass)|
|Grant to South Entrance||Open||Good/Drifting||Rubber tracked oversnow concession vehicles|
|Junction to Chief Joseph Hwy ♦||CLOSED ♦||CLOSED ♦||CLOSED ♦|
|Lake to East Entrance||Open||Drifting||Rubber tracked oversnow concession vehicles|
|Lake to West Thumb||Open||Fair||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|
* = Open year-round to wheeled vehicle travel.
NR=No Restrictions / STA=Snow Tires Advised / STR=Snow Tires Required
♦ = CLOSED FOR THE WINTER SEASON
The park service plowing schedule for roads for the spring season.
******** FOR CURRENT ROAD INFORMATION PLEASE CALL 307-344-2117 ********
|¤ ¤ - Please Note - ¤ ¤||There is NO wheeled vehicle travel East of Cooke City, Montana during the winter. This road (U.S. Highway 212), is Closed to Wheeled Vehicle Travel to the East as it is not plowed or maintained until late spring. In order to exit Silver Gate, Montana, or Cooke City, Montana, and Yellowstone, you must travel West back through Yellowstone to the North Entrance at Gardiner, Montana to exit the park and these towns.|
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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. Also, see the Avalanche Advisory posted below.
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by the National Weather Service Riverton, Wyoming
Today: Mostly cloudy in the morning then becoming partly cloudy. Isolated snow showers. Chance of snow 20 percent. Highs 24°F to 30°F.
Tonight: Partly cloudy in the evening then clearing. Lows 7°F to 13°F.
Saturday: Breezy. Partly cloudy. Southwest winds 15 to 20 mph. Highs 26°F to 32°F.
Saturday Night: Partly cloudy in the evening then becoming mostly cloudy. A 50 percent chance of snow. Southwest winds around 15 mph. Lows 11°F to 17°F.
Sunday: Snow likely. Snow accumulation of 2 to 3 inches. West winds around 15 mph in the afternoon. Chance of snow 70 percent. Highs 19°F to 25°F.
Sunday Night: Colder. Mostly cloudy in the evening then becoming partly cloudy. A 40 percent chance of snow. Lows 4°F to 10°F.
Monday / Presidents' Day: Partly cloudy with a 20 percent chance of snow. Highs 18°F to 24°F.
Monday Night / Presidents' Day Night: Partly cloudy. Lows 5°F to 11°F.
Tuesday: Partly cloudy with a 20 percent chance of snow. Highs 24°F to 30°F.
Tuesday Night: Mostly cloudy with a 40 percent chance of snow. Lows 9°F to 15°F.
Wednesday: Mostly cloudy with a 40 percent chance of snow. Highs 21°F to 27°F.
Wednesday Night: Colder. Mostly cloudy in the evening then becoming partly cloudy. A 40 percent chance of snow. Lows 1°F to 7°F.
Thursday: Partly cloudy with a 30 percent chance of snow. Highs 21°F to 27°F.
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|* * * Snow Depth Totals as reported at SNOTELs * * *|
|Station||Depth (inches)||Station||Depth (inches)|
|Black Bear||84||Parker Peak||59|
|Evening Star||70||Sylvan Road||31|
|Fisher Creek||82||Thumb Divide||41|
|Grassy Lake||67||Two Ocean Plateau||68|
|Lewis Lake Divide||66||West Yellowstone||26|
|Madison Plateau||54||Whiskey Creek||34|
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from the Gallatin National Forest Avalanche Center - February 15, 2013 - this report is by Mark Staples. This advisory does not apply to operating ski areas.
Since yesterday the northern Gallatin Range received 5 inches of new snow and probably more up high in Hyalite Canyon. The Bridger Range, northern Madison Range and mountains near Cooke City received 2 to 3 inches. The mountains closer to West Yellowstone received a trace to one inch. This morning temperatures were in the low teens Fahrenheit and winds were averaging 10 to 15 mph from the West and Northwest with gusts of 20 to 25 mph. Today will be partly sunny with temperatures around 20 degrees Fahrenheit. Winds will blow 10 mph and gust to 25 mph from the West and Northwest. Saturday should be sunny with more snow coming Sunday.
Snowpack and Avalanche Discussion:
In the last 48 hours the Fisher Creek SNOTEL site reported 0.8 inches of snow water equivalent, but there is almost double this amount in places which means 1.5 feet of new snow. Winds yesterday afternoon were blowing 25 to 40 mph from the Northwest and averaging close to 20 mph this morning, perfect speeds for drifting the fresh powder. Yesterday a skier spotted several small avalanches, ski cut one, and experienced cracking in the new snow.
Stability evaluations are relatively simple in this area because the main avalanche problem is new snow and wind-blown snow. The exception is low elevation areas that have weak facets near the ground. In one of these areas 11 days ago a rider remotely triggered an avalanche following heavy snowfall. Today the Avalanche Danger is rated CONSIDERABLE on wind loaded slopes steeper than 35 degrees. All other slopes have a MODERATE Avalanche Danger.
Bridger, Southern Gallatin and Madison Ranges, and Lionhead area near West Yellowstone:
In the Bridger Range and the mountains near Big Sky and West Yellowstone, there has been light snowfall during the last few days and relatively light winds which were averaging 10 to 15 mph this morning. Yesterday ski patrols reported that wind loaded areas were not very reactive. The main concern is a layer of facets buried 1 to 2 feet deep (photo). This layer is more widespread closer to West Yellowstone. I don't expect many avalanches on it, but I would be looking for this layer before riding or skiing in avalanche terrain. The presence of this layer means human triggered avalanche are possible and the Avalanche Danger is rated MODERATE.
Northern Gallatin Range:
The northern Gallatin Range which includes Mount Ellis, Hyalite Canyon, and the Little Bear area, has two factors contributing to poor stability. This area received more snow than other places recently, and it has layers of weak facets on many slopes. Skiers on Mount Wheeler found a poor snowpack structure (photo) and a small recent avalanche, both red flags. A group of skiers in Hyalite Canyon triggered one small avalanche and saw several others all about 12 to 14 inches deep involving new snow with some wind loading.
Avalanches may easily break deeper in the snowpack on weak faceted layers now buried 2 to 3 feet deep (photo1, photo2). Late last night, ridgetop winds averaged 20 mph which is perfect for moving fresh powder. Today with new snow, wind, and widespread buried weak layers, the Avalanche Danger is CONSIDERABLE.
The next advisory tomorrow morning at 7:30 AM. If you have any snowpack or avalanche observations, drop us a line at firstname.lastname@example.org or call us at: 406-587-6984.
EDUCATION, PHOTOS, SNOWPITS, and VIDEOS
1. For links to Articles, Education and (photos), (snowpits), or (videos) listed in the above report, please visit this Link.
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.
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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
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