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Daily Winter Weather Report

Date: Wednesday - January 26, 2011

Station Max Temp Min Temp Pres Temp New Snow Depth Sky Present Conditions
Canyon 26 14 16 T 43 OC Lite winds
East Entrance 23 7 8 0 33   Calm / Clear
Grant Village 31 17 23 0 46 OC Calm
Lake 26 13 17 1 43 OC Calm
Lamar 21 18 19 T 30 OC W@3mph
Madison 34 12 16 1 31 OC Calm / lite snow
Mammoth 33 22 29 T 17 OC SSE@3.2mph / gust 4.8mph
Old Faithful 32 3 25 0 31 OC SSW@3.9mph / gust 6.1mph
Snake River 30 15 19 T 53 OC Calm
Tower 31 13 21 T 28 BC Calm
West Entrance 32 24 25 0 38 OC Calm
T=Trace / BC=Broken Clouds / OC=Overcast / SC=Scattered Clouds
All Temperatures are in °F ~ All Snow Depths are in Inches

* * * Road Conditions * * *
Road Section Status Conditions Public Access / Info
Gardiner to Mammoth YR Fair STR
Mammoth to Tower YR Fair STR
Tower to NE Entrance YR Fair STR
Beartooth Highway CLOSED * CLOSED * CLOSED *
Canyon to Lake Open Good Oversnow
Firehole Canyon Drive Open - Oversnow - Snowcoaches only in the morning
Grant to South Entrance Open Fair Oversnow
Junction to Chief Joseph Hwy CLOSED * CLOSED * CLOSED *
Lake to East Entrance Open Fair Oversnow
Lake to West Thumb Open - Oversnow
Madison to Old Faithful Open - Oversnow
Madison to West Yellowstone Open - Oversnow
Mammoth to Norris Open Fair Oversnow
Norris to Canyon Open Fair Oversnow
Norris to Madison Open - Oversnow
Old Faithful to Grant Open - Oversnow

YR=Year Round / NR=No Restrictions / STA=Snow Tires Advised / STR=Snow Tires Required


# 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 ********


Yellowstone Seven Day Forecast on 26 January 2011
by the National Weather Service Riverton, WY

Today...Patchy fog in the morning. Mostly cloudy with a 20 percent chance of snow. Highs 25°F to 31°F. Southwest winds around 15 mph late in the afternoon.

Tonight...Mostly cloudy. A 20 percent chance of snow in the evening. Patchy fog after midnight. Lows 9°F to 15°F. Southwest winds around 15 mph.

Thursday...Mostly cloudy. Patchy fog in the morning. Highs 28°F to 34°F.

Thursday Night...Mostly cloudy in the evening then becoming partly cloudy. Lows 13°F to 19°F. Southwest winds around 15 mph after midnight.

Friday...Mostly cloudy. Highs 30°F to 36°F. Southwest winds around 15 mph.

Friday Night...Partly cloudy with a 20 percent chance of snow. Lows 14°F to 20°F.

Saturday...Partly cloudy with a 20 percent chance of snow. Highs 26°F to 32°F.

Saturday Night...Partly cloudy with a 30 percent chance of snow. Lows 11°F to 17°F.

Sunday...Mostly cloudy with a 50 percent chance of snow. Highs 21°F to 27°F.

Sunday Night...Mostly cloudy in the evening then becoming partly cloudy. A 30 percent chance of snow. Lows 7°F to 13°F.

Monday...Partly cloudy with a 20 percent chance of snow. Highs 19°F to 25°F.

Monday Night...Partly cloudy with a 20 percent chance of snow. Lows 8°F to 14°F.

Tuesday...Partly cloudy with a 20 percent chance of snow. Highs 21°F to 27°F.

Snowflake Hazardous Weather Snowflake Gibbon Falls Forecast Snowflake Mammoth Forecast Snowflake Midway Forecast Snowflake Norris Forecast Snowflake Old Faithful Forecast Snowflake

* * * Snow Depth Totals as reported at SNOTELs * * *
Station Depth (inches) Station Depth (inches)
Black Bear 91 Parker Peak 80
Blackwater 60 Snake River Station 33
Canyon 44 Sylvan Lake 59
Evening Star 79 Sylvan Road 43
Fisher Creek 89 Thumb Divide 46
Grassy Lake 82 Two Ocean Plateau 72
Lewis Lake Divide 75 West Yellowstone 37
Madison Plateau 61 Whiskey Creek 48
Northeast Entrance 37 Wolverine 41

Avalanche Information
from the Gallatin National Forest Avalanche Center - January 26, 2011 - this report is by Doug Chabot

Mountain Weather

As the snowstorm tapered off yesterday morning it dropped an additional two to three inches up Hyalite with a trace to one inch everywhere else. Temperatures reached the mid 20's with westerly winds at 15-20 mph. A brief spell of "precipitation" (code word for rain) was reported on Mount Blackmore around noon yesterday. Today's high pressure will bring partly cloudy skies, temperatures warming to the high 20s and westerly winds at 5-15 mph.

Snowpack and Avalanche Discussion:

The Bridger, Madison and Gallatin Ranges, the Lionhead area near West Yellowstone:

In the last 36 hours four to six inches fell in the mountains. The snowpack is strong and wind slabs that formed over the weekend are now glued down. Sluffing and easy ski cuts with the new snow were reported by Big Sky and Moonlight Basin Ski Patrols. Yesterday, a snowmobiler up Buck Ridge noted a small avalanche from this weekend, but saw little evidence of wind or cornice growth. Further south skiers in Bacon Rind found stable snow in their snowpits with no signs of instability. Eric toured around Hyalite yesterday and wrote that, "The snowpack welcomed the fresh foot of snow (since Sunday) with open arms." Not far away a skier on Blackmore was bummed to have it drizzle up to 10,000 feet which put a crust on slopes they were skiing. Luckily, this event seemed localized. I rode and skied into the Fairy Lake area in the northern Bridger Range yesterday. Unfortunately, visibility was poor and we could not see the reported slide on Hardscrabble Peak from late last week, but we did tour around and dig pits looking for weak snow. With over five feet on the ground the only weakness was about a foot under the surface when an interface between old and new snow broke clean in some of our tests. This issue appears isolated and after close inspection I'm convinced it won't last long.

Given the increasing strength of the snowpack the avalanche danger is dropping accordingly. For today the Avalanche Danger is rated MODERATE on all slopes steeper than 35 degrees. All other slopes have a LOW Avalanche Danger.

The mountains around Cooke City and the Washburn Range:

The mountains around Cooke City also have a strong snowpack. The only stability issue in these mountains is all the new snow; over six feet has fallen in the last two weeks. Although there are no buried weak layers, this heavy load of snow is a concern all by itself. It's been less than 24 hours since the storm stopped and even the strongest snowpack needs time to adjust from this much snowfall.

For this reason the Avalanche Danger is rated MODERATE today. Winds are calm, but previous loading at the ridgetops should be approached with caution. In general, it's still possible to trigger a slide.

This Friday: Beacon Park Opening Celebration

The Bozeman Recreation Department is celebrating the opening of the Bozeman Beacon Park on Friday, January 28th from 4:00 to 6:00 PM at Beall Park, 415 North Bozeman. The Recreation Department will offer food, refreshments, music, and training on how to use the park with your avalanche beacon. This event is free to the public. For information call: 406-582-2290.

West Yellowstone: Beacon Park Operational

Skiing or riding near West Yellowstone? Test your beacon skills at a beacon park near the old airport where you can search for pre-placed beacons switched on/off by a control panel. Look for it by orange snow fence and signage just south of the snow cross track.

Information provided by Doug Chabot, Mark Staples, and Eric Knoff from the Gallatin National Forest Avalanche Center.

If you have any snowpack or avalanche observations, drop them a line at or call: 406-587-6984.

For detailed Avalanche Terms utilized here, please see the Avalanche Glossary.

Avalanche Danger Scale

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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