Daily Winter Weather Report
|Yellowstone National Park Winter Weather Links|
|Avalanche Advisory||Special Weather Info|
|Daily Winter Weather Report||Winter Road Report|
|Snow Depth Totals||Yellowstone Weather Forecast|
Date: Friday - 18 January 2013
|Station||Pres Temp||Max Temp||Min Temp||New Snow||Depth||Sky||Present Conditions|
|Bechler||-7.0||-4.0||-7.0||.22||SC||NNE @ 1 - 2 mph|
|Mammoth||19.3||22.6||18.3||0||11||SC||SSE @ 4 - 6 mph|
|Old Faithful||5.6||15.9||1.8||0||29||SC||E @ 1 - 3 mph|
|Thorofare||20.0||24.0||20.0||.03||SC||W @ 2 - 9 mph|
|Tower||-1.3||4.4||-2.5||.02||7.39||SC||SSW @ 2 mph|
* * Live Weather via All Yellowstone WebCams * *
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|Road Section||Status||Conditions||Public Access / Info|
|Gardiner to Mammoth||YR||STR|
|Mammoth to Tower||YR||STR|
|Tower to NE Entrance||YR||STR|
|Beartooth Highway||CLOSED *||CLOSED *||CLOSED *|
|Canyon to Lake||Open||Fair||Rubber tracked oversnow concession vehicles|
|Firehole Canyon Drive||Open||Fair||Rubber tracked oversnow concession vehicles|
|Grant to South Entrance||Open||Fair||Rubber tracked oversnow concession vehicles|
|Junction to Chief Joseph Hwy||CLOSED *||CLOSED *||CLOSED *|
|Lake to East Entrance||Open||Fair||Rubber tracked oversnow concession vehicles|
|Lake to West Thumb||Open||Fair||Rubber tracked oversnow concession vehicles|
|Madison to Old Faithful||Open||Fair||Rubber tracked oversnow concession vehicles|
|Madison to West Yellowstone||Open||Fair||Rubber tracked oversnow concession vehicles|
|Mammoth to Norris||Open||Fair||Rubber tracked oversnow concession vehicles|
|Norris to Canyon||Open||Fair||Rubber tracked oversnow concession vehicles|
|Norris to Madison||Open||Fair||Rubber tracked oversnow concession vehicles|
|Old Faithful to Grant||Open||Fair||Rubber tracked oversnow concession vehicles|
|Tower to Canyon||CLOSED *||CLOSED *||CLOSED *|
YR=Year Round / NR=No Restrictions / STA=Snow Tires Advised / STR=Snow Tires Required
* NOTE: CLOSED FOR THE SEASON.
# 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 ********
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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.
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by the National Weather Service Riverton, WY
Today: Partly cloudy in the morning then clearing. Patchy freezing fog in the morning. Highs 24°F to 30°F.
Tonight: Mostly clear. Southwest winds around 15 mph after midnight. Lows 1°F to 7°F.
Saturday: Partly cloudy. Highs 23°F to 29°F.
Saturday Night: Partly cloudy. Lows 2°F to 8°F.
Sunday: Partly cloudy. Highs 23°F to 29°F.
Sunday Night: Partly cloudy. Lows 3°F to 9°F.
Monday / Martin Luther King Jr Day: Partly cloudy. Highs 24°F to 30°F.
Monday Night / Martin Luther King Jr Night: Mostly clear. Patchy fog after midnight. Lows 2°F to 12°F.
Tuesday: Mostly sunny. Patchy fog in the morning. Highs 25°F to 31°F.
Tuesday Night: Mostly clear. Patchy fog after midnight. Lows 2°F to 12°F.
Wednesday: Partly cloudy in the morning then becoming mostly cloudy. A 20 percent chance of snow. Highs 24°F to 30°F.
Wednesday Night: Mostly cloudy with a 30 percent chance of snow. Lows 9°F to 15°F.
Thursday: Mostly cloudy with a 30 percent chance of snow. Highs 17°F to 23°F.
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|* * * Snow Depth Totals as reported at SNOTELs * * *|
|Station||Depth (inches)||Station||Depth (inches)|
|Black Bear||72||Parker Peak||45|
|Blackwater||45||Snake River Station||33|
|Evening Star||50||Sylvan Road||23|
|Fisher Creek||65||Thumb Divide||39|
|Grassy Lake||53||Two Ocean Plateau||54|
|Lewis Lake Divide||59||West Yellowstone||23|
|Madison Plateau||50||Whiskey Creek||29|
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from the Gallatin National Forest Avalanche Center - January 18, 2013 - this report is by Mark Staples. This advisory does not apply to operating ski areas.
A ridge of high pressure over the Pacific Northwest is responsible for warm, sunny and windy conditions over Southwest Montana. This morning mountain temperatures were in the mid 20s Fahrenheit with valley temperatures in the mid teens Fahrenheit. Westerly winds were averaging 15 to 30 mph with gusts reaching 40 to 50 mph. Winds will remain strong today and temperatures should approach 32 degrees Fahrenheit, but some places like the Bridger Range could see temperatures in the 40s Fahrenheit.
Snowpack and Avalanche Discussion:
The Bridger, Gallatin, and Madison Ranges, the Lionhead area near West Yellowstone, and Cooke City:
In many places there is little snow left for winds to transport (photo). Today's strong winds will find the last remaining snow crystals and move them to the lee sides of ridges and gullies. Most wind slabs are at least 24 to 48 hours old. These wind slabs will be more difficult to trigger as more time passes but they remain the primary avalanche problem today.
Another problem is a layer of weak, faceted snow crystals buried 6 to 16 inches deep (snowpit). Because this layer is not buried deeply but could produce an avalanche, dig multiple snowpits about two feet deep taking less than a minute for each. This layer seems to be weakest in areas with a snowpack 3 feet deep or less. Also, it mostly exists in areas below treeline that don't usually see much wind. Slopes with soft powder are prime locations to find this layer. It is worth noting that two days ago this layer produced collapsing and cracking for me just north of Big Sky on a southerly aspect, a clear sign of instability, and Eric and Karl found this layer capable of producing long crack propagations where it was capped by a hard wind slab (video), another sign of instability.
With this weak layer lurking on some slopes and hard wind slabs on others, triggering an avalanche today is possible, and the Avalanche Danger is rated MODERATE.
The next advisory tomorrow morning at 7:30 a.m. 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) and (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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