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Daily Winter Weather Report

Date: Tuesday - 05 March 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 -13.0 -6.0 -13.0 .15   SC N @ 2 - 3 mph
Canyon 0.7 0.7 -8.9 0 40 SC  
East Entrance 0.0 0.8 -1.8 0 22 SC  
Lake -13.0 -6.0 -15.0 0 37 SC Calm
Madison -1.6 -0.6 -8.4     SC  
Mammoth 10.8 12.4 7.4 0 9 SC S @ 3 - 4 mph
NE Entrance -1.1 -1.1 -4.9 0 26 SC  
Old Faithful -6.3 -5.3 -10.1 0 25 SC E @ 3 - 4 mph
Soda Butte -2.9 -2.9 -11.5 .07   SC  
South Entrance -17.4 -9.1 -17.4 0 45 SC  
Sylvan Lake -1.8 -1.8 -7.1 0 54 SC  
Sylvan Road -11.0 -8.3 -11.0 0 33 SC  
Thorofare 4.0 5.0 3.0 .03   SC ESE @ 6 - 12 mph
Thumb Divide -16.1 -13.7 -16.1 0 50 SC  
Tower -1.0 -1.0 -6.5 0   SC SE @ 2 mph
West Entrance -4.2 -4.2 -9.4 0 29 SC  
BC=Broken Clouds / C=Clear / OC= Overcast/ SC=Scattered Clouds
All Temperatures are in °F ~ All Snow Depths are in Inches

* * Live Weather via All Yellowstone WebCams * *

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* * * Road Conditions * * *
Road Section Status Conditions Public Access / Info
Gardiner, MT to Mammoth Open * Snow Packed/Icy STR - Not Maintained from 4:30 PM to 6:00 AM
Mammoth to Tower ø Open * ø 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
Canyon to Lake Open   Rubber tracked oversnow concession vehicles
Canyon to Tower CLOSED CLOSED CLOSED ♦    (over Dunraven Pass)
Grant to South Entrance § § Open § Poor 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
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




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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Yellowstone Seven Day Forecast on March 05, 2013
by the National Weather Service Riverton, Wyoming

Today: Mostly sunny until late afternoon then becoming partly cloudy. Southwest winds around 15 mph. Highs 27°F to 33°F. Lowest wind chill readings -20°F to -30°F in the morning.

Tonight: Mostly clear in the evening then becoming partly cloudy. South winds around 15 mph. Lows 13°F to 19°F.

Wednesday: Breezy...cloudy. Chance of snow in the morning... Then snow...possibly mixed with rain in the afternoon. Snow accumulation of 1 to 2 inches. Southwest winds 15 to 20 mph. Chance of precipitation 60 percent. Highs 32°F to 38°F.

Wednesday Night: Breezy...cloudy. Snow likely in the evening... Then chance of snow after midnight. Snow accumulation of 1 to 2 inches. Total snow accumulation 2 to 4 inches. Southwest winds 15 to 20 mph. Chance of snow 60 percent. Lows 12°F to 18°F.

Thursday: Mostly cloudy with a 30 percent chance of snow. Southwest winds around 15 mph in the morning. Highs 28°F to 34°F.

Thursday Night: Mostly cloudy with a 40 percent chance of snow. Lows 13°F to 19°F.

Friday: Mostly cloudy with a 30 percent chance of snow. Highs 30°F to 36°F.

Friday Night: Partly cloudy with a 20 percent chance of snow. Lows 15°F to 21°F.

Saturday: Partly cloudy. Highs 30°F to 36°F.

Saturday Night: Partly cloudy. Lows 13°F to 19°F.

Sunday: Mostly sunny. Highs 32°F to 38°F.

Sunday Night: Mostly clear in the evening then becoming partly cloudy. Lows 13°F to 19°F.

Monday: Partly cloudy in the morning then becoming mostly cloudy. A 20 percent chance of snow. Highs 30°F to 36°F.

Snowflake Hazardous Weather Forecast Snowflake Yellowstone & Grand Teton Forecasts Snowflake Gibbon Falls Forecast Snowflake Mammoth Forecast Snowflake Midway Forecast Snowflake Norris Forecast Snowflake Old Faithful Forecast Snowflake

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* * * Snow Depth Totals as reported at SNOTELs * * *
Station Depth (inches) Station Depth (inches)
Black Bear 96 Parker Peak 62
Blackwater 63 South Entrance 45
Canyon 40 Sylvan Lake 54
Evening Star 70 Sylvan Road 33
Fisher Creek 81 Thumb Divide 50
Grassy Lake 76 Two Ocean Plateau 76
Lewis Lake Divide 76 West Yellowstone 29
Madison Plateau 61 Whiskey Creek 39
Northeast Entrance 26 Wolverine 27

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Avalanche Advisory

from the Gallatin National Forest Avalanche Center - March 05, 2013 - this report is by Doug Chabot. This advisory Does Not Apply to operating ski areas.

Mountain Weather

This morning under clear skies, mountain temperatures are in the single digits Fahrenheit with west to southwest winds averaging 10 to 15 mph. There's no new snow to report. Today will be mostly sunny with temperatures warming into the upper teens Fahrenheit and light southwest winds. This evening a Pacific low pressure system will bring cloudy skies and a chance of snow tomorrow.

Snowpack and Avalanche Discussion:

Bridger, Gallatin, and Madison Ranges, Lionhead Area near West Yellowstone, and Cooke City:

Yesterday, our main avalanche concern was on wind–loaded slopes. Northwest winds and 5 to 7 inches of snow created shallow drifts at the ridgelines. These drifts are still there and remain one of our avalanche concerns. They will not be very sensitive or large, but as Mark witnessed in Cooke City they have the potential to flush a person down unforgiving terrain (photo).

Throughout our advisory area faceted and weak layers of snow can be found in the upper three feet of the snowpack. These layers of concern vary from surface hoar to small, angular crystals. Stability tests quickly reveal them. On Sunday, in Dudley Creek in the northern Madison Range, Eric found a variety of faceted layers that were breaking in snowpits and causing him concern (video).

On some slopes the snowpack is shallow, weak and unsupportable. An unscientific, but valid test to find these slopes is to step onto the snow: sinking to the ground pinpoints a weak snow structure. These zones can be found on lower elevation slopes as well as rocky, wind-swept terrain above treeline (Hardscrabble avalanche pic). Last week, I found poor structure on Mount Ellis and Mark and Eric looked at a natural avalanche in thick trees on Mount Wheeler with a similar problem (photo). On Sunday, two snowboarders were caught in a small avalanche in the forest below the highest History Rock meadow in Hyalite (photo). I was unable to find the slide yesterday, but besides surfing over logs and head-faking tree branches I can attest to the thin and weak structure of the snowpack…in the trees.

Many slopes are stable, but some are not. The safest way to find the difference is to stop, dig and test the slope you plan on riding. So far we have been spared avalanche fatalities this season, but other regions have not. Last weekend a skier was killed in the Tetons as he climbed up a steep couloir (article) and a snowmobiler was killed in Utah on a slope with a snowpack very similar to ours (accident report). I mention this as a warning to not let our guard down. For today, the Avalanche Danger is rated MODERATE since it is still possible to trigger slides.

The next advisory tomorrow morning at 7:30 AM. If you have any snowpack or avalanche observations, drop us a line at or call us at: 406-587-6984.


1. For links to Articles, Education and (photos), (snowpits), or (videos) listed in the above report, please visit this Link.

2. They have recently uploaded more photos and snowpits to their web site, more than what are linked in the advisory above.

3. They have creating a series of "How To…" stability test videos. So far they have clips on performing a CT and ECT. They are located under Stability Tests on their Resources page.

Information provided by Doug Chabot, Mark Staples, and Eric Knoff from the Gallatin National Forest Avalanche Center. For Photos and Videos, please visit the Avalanche Centers Website!

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

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Information provided by Yellowstone National Park, National Weather Service and Gallatin National Forest Avalanche Center

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