Yellowstone Up Close and Personal Logo © Copyright Page Makers, LLC
Yellowstone Up Close and Personal Grizzly Logo © Copyright Page Makers, LLC

Daily Winter Weather Report

Date: Friday - January 07, 2011

Station Max Temp Min Temp Pres Temp New Snow Snow Depth BC OC SC Present Conditions
Canyon 25 13 14 T 37     X Calm
East Entrance 34 26 28 0 30   X   W@3-5mph
Grant Village 25 9 11 0 45 X     Calm
Lake 26 18 23 0 37 X     Calm
Lamar 32 22 23 T 22   X   Calm
Madison 31 8 10 T 27   X   Calm
Mammoth 34 23 25 0 17     X SW@4mph
Old Faithful 28 11 14 0 28     X Calm
Snake River 25 19 22 T 41 X     Calm
Tower 33 21 24 T 26   X   Calm
West Entrance 25 4 8 0 36   X   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 STR STR
Mammoth to Tower YR STR STR - Blowing / Drifting
Tower to NE Entrance YR STR STR - Blowing / Drifting
Canyon to Lake Open Good Oversnow
Firehole Canyon Drive Open - Oversnow - Snowcoaches only in the morning
Grant to South Entrance Open Good Oversnow
Junction to Chief Joseph Hwy CLOSED CLOSED CLOSED
Lake to East Entrance Open Good Oversnow
Lake to West Thumb Open Fair Oversnow
Madison to Old Faithful Open Good Oversnow
Madison to West Yellowstone Open Good Oversnow
Mammoth to Norris Open Fair Oversnow
Norris to Canyon Open Fair Oversnow
Norris to Madison Open Good Oversnow
Old Faithful to Grant Open Fair 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 07 January 2011 by the NWS Riverton, WY

Rest Of Today: Mostly cloudy with a 40 percent chance of snow. Highs 26°F to 32°F.

Tonight: Chance of snow in the evening...then snow likely after midnight. Snow accumulation of 1 to 2 inches. Lows 15°F to 21°F. Chance of snow 70 percent.

Saturday: Snow likely in the morning...then snow in the afternoon. Snow accumulation of 1 to 2 inches. Highs 21°F to 27°F. Southwest winds around 15 mph in the late morning and afternoon. Chance of snow 80 percent.

Saturday Night: Colder. Snow in the evening...then chance of snow after midnight. Snow accumulation of 2 to 4 inches. Total snow accumulation 4 to 8 inches. Lows -2°F to 4°F. Northwest winds around 15 mph in the evening. Chance of snow 90 percent.

Sunday: Colder. Cloudy with a 40 percent chance of snow. Highs 7°F to 13°F.

Sunday Night: Colder. Cloudy with a 30 percent chance of snow. Lows -6°F to -14°F.

Monday: Mostly cloudy with a 20 percent chance of snow. Highs -1°F to 5°F.

Monday Night: Mostly cloudy in the evening then becoming partly cloudy. Lows -11°F to -19°F.

Tuesday: Partly cloudy. Highs 1°F to 7°F.

Tuesday Night: Partly cloudy in the evening then becoming mostly cloudy. A 20 percent chance of snow. Lows -3°F to -9°F.

Wednesday: Not as cold. Mostly cloudy with a 30 percent chance of snow. Highs 12°F to 18°F.

Wednesday Night: Mostly cloudy with a 30 percent chance of snow. Lows 3°F to 9°F.

Thursday: Mostly cloudy with a 40 percent chance of snow. Highs 17°F to 23°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 86 Snake River Station 25
Blackwater 48 Sylvan Lake 47
Canyon 36 Sylvan Road 32
Evening Star 58 Thumb Divide 45
Grassy Lake 72 Two Ocean Plateau 61
Lewis Lake Divide 68 West Yellowstone 34
Madison Plateau 57 Whiskey Creek 45
Parker Peak 77 Wolverine 28

Avalanche Information - from the Gallatin National Forest Avalanche Center this report is by Mark Staples

Mountain Weather:

Warm weather is the word this morning with temperatures mostly in the mid to high 20s Fahrenheit. Westerly ridgetop winds calmed slightly from yesterday blowing 10-25 mph near Bozeman and 5-15 mph elsewhere. Yesterday afternoon some areas received a brief shot of freezing rain followed by a dusting of snow. More precipitation should come this afternoon possibly starting as rain before changing to snow. By tomorrow morning 2-3 inches should accumulate with more on the way. Today will have high temperatures near 30 degrees Fahrenheit with westerly winds blowing 10-15 mph.

Snowpack and Avalanche Discussion:

The northern Madison Range:

Yesterday someone was caught in an avalanche on a West facing slope in Beehive Basin near Big Sky. Although she was not injured or buried, her snowboard broke upon impact with a tree. This avalanche was about 150 feet wide, 2-5 feet deep and occurred in a gully cross loaded with wind-blown snow. It didn't run very far, but the debris was 10 feet deep on a bench where the avalanche stopped. This group dug a snowpit on a similar aspect and performed a Rutschblock test with stable results, but they reported ignoring several key factors wanting to believe the slope was stable.

1.There was significant new snow.

2.There was significant wind loading on the slope from cross winds.

3.The snowpack structure was entirely different on the slope from what they saw in their snowpit.

4.The bench created a terrain trap where the debris ran into trees and piled 10 feet deep.

Additionally they reported a false sense of security from their snowpit and stability test results as well as seeing dropped cornices on the other side of the ridge (East aspect) without triggered avalanches. These factors seem obvious in hindsight but never are in the moment, and this avalanche provides a great lesson. I've been guilty of ignoring clues and always struggle with managing the human element of decision making especially when the riding is good.

Significant new snow and wind-blown snow adds stress to the snowpack pushing any weak layer to its breaking point. The most widespread weak layer near Big Sky has been buried surface hoar, about 2-3 feet deep. While this layer has gained strength on many slopes, it remains weak on others. Wind loaded slopes remain the primary concern. In most places avalanches will break within the new snow but can break on deeper layers as yesterday's avalanche demonstrated. Today the Avalanche Danger is rated CONSIDERABLE on all wind loaded slopes. All other slopes have a MODERATE Avalanche Danger.

The Bridger Range, southern Madison and entire Gallatin Ranges, the Lionhead area near West Yellowstone, the mountains around Cooke City and the Washburn Range:

Yesterday Eric and I went to the Taylor Fork area hunting for instabilities but we found more face shots than weak layers. A similar report came from skiers near Cooke City where they avoided obvious pillows of wind-blown snow, found no stability issues in their snowpits, and found waist deep powder. Stability evaluations through much of the advisory area (except for the mountains near Big Sky) are relatively simple and any weaknesses are not buried deeply. On a Southwest aspect, near Skyline Ridge, Eric and I found the strongest snowpit I've seen this year. On a Northeast aspect in Sunlight Basin, we found a layer about 12 inches down that only concerned us if it had the additional load of wind-blown snow.

Today the Avalanche Danger is rated:

CONSIDERABLE on slopes steeper than 35 degrees with a wind load

MODERATE on less steep slopes with a wind load OR steep slopes without a wind load

LOW on slopes less than 35 degrees without a wind load

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

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

Avalanche Danger Scale

Gallatin National Forest Avalanche Center ~ Mammoth Weather Forecast

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

Yellowstone National Park by Page Makers, LLC © Copyright All Rights Reserved
I n d e x
Accessibility Earthquakes Maps Video Page
Address Email Newspaper Visitor Centers
Adult Programs Entrances Old Faithful Live WebCam Visitor Stats
Amphibians Entrance Fees Pets Volcano Observatory
Animals Fall Closure Phone Numbers Waterfalls
Backcountry Fish Picnic Areas Weather
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
Not all who wander are lost by John Ronald Reuel Tolkien © Page Makers, LLC
Yellowstone National Park WebCams
Old Faithful Live All Old Faithful Old Faithful Static Old Faithful VC North Entrance Mt Washburn Mammoth YVO WebCam

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)
(North) = Closest Entrance to Yellowstone National Park.

State Road Reports
Idaho Utah
Montana Wyoming

Entrance Cities and Gateway Towns
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

Contact Us

by John William Uhler

Back to: Yellowstone Up Close and Personal

Copyright © 1995 - 2014 Page Makers, LLC and Yellowstone Media ~ All Rights Reserved