Daily Winter Weather Report
Date: Sunday - 17 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||23.0||24.0||20.0||.06||BC||SW @ 2 - 10 mph|
|Lake||19.9||23.0||17.1||.06||32||BC||W @ 6 mph|
|Mammoth||26.9||31.8||26.9||.07||9||BC||NNE @ 4 - 6 mph|
|Old Faithful||22.0||26.7||22.0||0||24||BC||NNW @ 2 - 6 mph|
|Thorofare||19.0||23.0||19.0||.01||BC||NW @ 16 - 29 mph|
|Tower||24.9||27.7||23.7||0||BC||NE @ 2 - 3 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||Rubber tracked oversnow concession vehicles|
|Canyon to Tower ♦||CLOSED ♦||CLOSED ♦||CLOSED ♦ (over Dunraven Pass)|
|Grant to South Entrance||Open||Rubber tracked oversnow concession vehicles|
|Junction to Chief Joseph Hwy ♦||CLOSED ♦||CLOSED ♦||CLOSED ♦|
|Lake to East Entrance||Open||Rubber tracked oversnow concession vehicles|
|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|
* = 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: Breezy...snow. Snow accumulation of 1 to 2 inches. West winds 15 to 20 mph. Chance of snow 80 percent. Highs 20°F to 26°F.
Tonight: Cloudy. Numerous snow showers in the evening...then scattered snow showers after midnight. Snow accumulation up to 1 inch. Total snow accumulation 1 to 4 inches. West winds around 15 mph in the evening. Chance of snow 60 percent. Lows 3°F to 9°F.
Monday / Presidents' Day: Mostly cloudy with isolated snow showers in the morning...then partly cloudy in the afternoon. Chance of snow 20 percent. Highs 20°F to 26°F.
Monday Night / Presidents' Day Night: Partly cloudy. Lows 3°F to 9°F.
Tuesday: Partly cloudy in the morning...then mostly cloudy with a 20 percent chance of snow in the afternoon. South winds around 15 mph in the afternoon. Highs 26°F to 32°F.
Tuesday Night: Mostly cloudy in the evening then becoming partly cloudy. A 20 percent chance of snow. Lows 11°F to 17°F.
Wednesday: Cloudy with a 40 percent chance of snow. Highs 24°F to 30°F.
Wednesday Night: Cloudy with a 40 percent chance of snow. Lows 5°F to 11°F.
Thursday: Cloudy with a 30 percent chance of snow. Highs 22°F to 28°F.
Thursday Night: Cloudy with a 20 percent chance of snow. Lows 7°F to 13°F.
Friday: Mostly cloudy with a 20 percent chance of snow. Highs 24°F to 30°F.
Friday Night: Mostly cloudy with a 30 percent chance of snow. Lows 8°F to 14°F.
Saturday: Mostly cloudy with a 40 percent chance of snow. Highs 24°F to 30°F.
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|* * * Snow Depth Totals as reported at SNOTELs * * *|
|Station||Depth (inches)||Station||Depth (inches)|
|Black Bear||82||Parker Peak||57|
|Evening Star||66||Sylvan Road||31|
|Fisher Creek||78||Thumb Divide||41|
|Grassy Lake||66||Two Ocean Plateau||65|
|Lewis Lake Divide||65||West Yellowstone||25|
|Madison Plateau||54||Whiskey Creek||34|
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from the Gallatin National Forest Avalanche Center - February 17, 2013 - this report is by Eric Knoff. This advisory does not apply to operating ski areas.
Overnight the mountains around Big Sky picked up 5 to 7 inches of new snow and it's still snowing. The Bridger Range, southern Madison Range and mountains around Cooke City picked up 3 to 5 inches, while the mountains around West Yellowstone picked up around 1 inch. Snow will continue through the day with additional 4 to 6 inches likely in the mountains near Bozeman and Big Sky. The mountains around West Yellowstone and Cooke City will see additional accumulations of 3 to 5 inches.
Currently, temperatures are in the high teens to low twenties Fahrenheit and winds are blowing 20 to 30 out the West-northwest. Temps will not warm much as a cold front moves over the area. Highs today will stay in the twenties Fahrenheit and winds will remain out of the West-northwest blowing 15 to 25 mph. Colder air will remain over the area the next few days.
Snowpack and Avalanche Discussion:
Over the past 24 hours, strong winds from the WNW have produced wind slabs in upper elevation terrain. Slopes below ridgelines or on the lee side of cross loaded terrain features will be likely areas to find wind deposited snow. While I don't expect wind slabs to break far and wide, they will easily pack enough punch to carry or even burry a skier or rider.
Fortunately this area mostly lacks buried persistent weak layers in the snowpack. The exception is areas with a thinner snowpack mostly at mid to low elevations. On Friday a skier experienced cracking and collapsing in mid-elevation terrain (photo).
Today, human triggered avalanches are likely on wind loaded slopes which have a CONSIDERABLE Avalanche Danger. Non-wind loaded slopes have a MODERATE Avalanche Danger.
Lionhead Area near West Yellowstone:
A layer of facets buried 1.5 to 2 feet deep is most pronounced in areas where the snowpack is thinner, mainly below 8,500 feet. This layer is gaining strength, but should not be fully trusted.
Today, buried facets make human triggered avalanche possible and the Avalanche Danger is rated MODERATE.
Bridger, Southern Gallatin and Madison Ranges:
Over six inches of snow has fallen in the past five hours in the mountains around Big Sky; 3 to 4 inches has fallen in the Bridger Range and southern Madison Range. This latest shot of snow has been accompanied by West-northwest winds blowing 20 to 30 mph. Today, wind slabs will be the primary avalanche concern. Upper elevation slopes facing south and east will be most prone to slab development. Wind slabs will grow in size and distribution as the storm continues through the day.
Non-wind loaded slopes will also feel the stress of this additional load. On Friday, snowmobilers near Sage Peak in the southern Madison Range remotely triggered an avalanche that broke 200 feet wide and ran 400 vertical. Also, the Big Sky ski patrol got a full depth release in the A-Z chutes while doing control work yesterday. South and west facing slopes have the thinnest and weakest snowpack; however, buried facets can be found on north and east aspects as well.
Today, the Avalanche Danger is rated CONSIDERABLE on wind loaded slopes. Non-wind loaded slopes have a MODERATE Avalanche Danger.
Northern Gallatin Range:
The northern Gallatin Range received the least amount of snow early season. This allowed the snowpack to become weak and faceted during a cold and dry January. Since the 1st of February, heavy amounts of snow have buried these faceted layers 2 to 3 feet deep. In some areas buried facets exist near the ground while in others they can be found mid-pack. Either way, they continue to produce a snowpack that's on edge. As more snow and wind arrive today, the snowpack will remain stressed. For this reason human triggered avalanches are likely and the Avalanche Danger is rated CONSIDERABLE.
The next advisory tomorrow morning at 7:30 AM. If you have any snowpack or avalanche observations, drop us a line at email@example.com 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 firstname.lastname@example.org or call: 406-587-6984.
For detailed Avalanche Terms utilized here, please see the Avalanche Glossary.
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Information provided by Yellowstone National Park, National Weather Service and Gallatin National Forest Avalanche Center
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