Daily Winter Weather Report
Date: Wednesday - 07 March 2012
|Station||Max Temp||Min Temp||Pres Temp||New Snow||Depth||Sky||Present Conditions|
|Road Section||Status||Conditions||Public Access / Info|
|Gardiner to Mammoth||YR||Intermittent Snow pack & Ice||Snow Tires Required|
|Mammoth to Tower||YR||Intermittent Snow pack & Ice||Snow Tires Required|
|Tower to NE Entrance||YR||Intermittent Snow pack & Ice||Snow Tires Required|
|Beartooth Highway||CLOSED *||CLOSED *||CLOSED *|
|Canyon to Lake||Open||Good||All oversnow vehicles|
|Canyon to Tower||CLOSED *||CLOSED *||CLOSED *|
|Firehole Canyon Drive||CLOSED||CLOSED||CLOSED|
|Grant to South Entrance||Open||Good||All oversnow vehicles|
|Junction to Chief Joseph Hwy||CLOSED *||CLOSED *||CLOSED *|
|Lake to East Entrance||CLOSED *||CLOSED *||CLOSED *|
|Lake to West Thumb||Open||Good||All oversnow vehicles|
|Madison to Old Faithful||Open||POOR||All oversnow vehicles|
|Madison to West Yellowstone||Open||POOR||All oversnow vehicles|
|Mammoth to Norris||CLOSED *||CLOSED *||CLOSED *|
|Norris to Canyon||CLOSED *||CLOSED *||CLOSED *|
|Norris to Madison||CLOSED *||CLOSED *||CLOSED *|
|Old Faithful to Grant||Open||Fair||All oversnow vehicles|
YR = Open Year Round / NR = No Restrictions
* NOTE: CLOSED FOR THE WINTER 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 ********
* The East Entrance Road from the East Entrance to Lake Butte has closed to public oversnow travel for the season (01 March 2012).
* The Grand Loop Road from Mammoth to Norris Junction closed for the season Sunday evening (04 March 2012).
* The road from Norris Junction to Madison, and Norris Junction to Canyon closes tonight at 9:00 PM (06 March 2012).
* The Mammoth Hotel, Dining Room, and Gift Shop close today (06 March 2012).
* The Old Faithful Snowlodge, cabins, and dining room closed for the season on Sunday (11 March 2012).
* The Geyser Grill and Old Faithful Visitor Center remain open through March 15.
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.
Caution advised for snow falling off of building roofs. Park accordingly.
* * Be prepared for bitter cold (sub-zero) temperatures (some of the temperatures below DO NOT have the Wind Chill factored in). See NWS Weather Forecast below for detailed information. * *
by the National Weather Service Riverton, Wyoming
Today: North northeast wind around 8 mph becoming west. Mostly sunny, with a high near 25°F. Wind chill values as low as -10°F.
Tonight: Northwest wind between 7 and 9 mph. Mostly clear, with a low around 3°F. Wind chill values as low as -10°F.
Thursday: North northeast wind at 7 mph becoming southwest. Sunny, with a high near 34°F. Wind chill values as low as -5°F.
Thursday Night: North northwest wind at 6 mph becoming east. Mostly clear, with a low around 18°F.
Friday: Southwest wind around 5 mph becoming calm. Sunny, with a high near 39°F.
Friday Night: Southwest wind around 6 mph. Mostly clear, with a low around 24°F.
Saturday: South southwest wind around 6 mph. Mostly sunny, with a high near 40°F.
Saturday Night: Mostly clear, with a low around 17°F.
Sunday: A slight chance of rain and snow showers. Chance of precipitation is 20%. Mostly sunny, with a high near 40°F.
Sunday Night: A 20% chance of snow showers. Mostly cloudy, with a low around 15°F.
Monday: A slight chance of snow showers. Partly sunny, with a high near 35°F.
Monday Night: A slight chance of snow showers. Partly cloudy, with a low around 13°F.
Tuesday: A slight chance of rain and snow showers. Mostly sunny, with a high near 39°F.
|* * * Snow Depth Totals as reported at SNOTELs * * *|
|Station||Depth (inches)||Station||Depth (inches)|
|Black Bear||114||Parker Peak||73|
|Blackwater||79||Snake River Station||66|
|Evening Star||94||Sylvan Road||49|
|Fisher Creek||98||Thumb Divide||56|
|Grassy Lake||106||Two Ocean Plateau||94|
|Lewis Lake Divide||94||West Yellowstone||49|
|Madison Plateau||76||Whiskey Creek||59|
from the Gallatin National Forest Avalanche Center - 07 March 2012 - 7:30 am - this report is by Mark Staples. This advisory does not apply to operating ski areas.
Yesterday's storm dropped 4 to 6 inches of snow throughout the advisory area except the northern Bridger Range which only received about an inch while only a few miles south, Bridger Bowl received 5 inches. Overnight skies cleared and temperatures dropped to the negative single digits Fahrenheit. Wind speeds and directions have varied considerably. In general winds were blowing strong early yesterday from the Southwest, calmed midday, then increased last evening from the Northwest blowing 15-25 mph. In some places like Hyalite winds have been very calm since yesterday while other places like Bridger Bowl and Lionhead they increased overnight. Today will be clear and sunny with temperatures climbing into the low 20s Fahrenheit. Winds will remain varied over the advisory area but will mostly blow from the West and North at 10-15 mph with gusts of 25 mph.
Snowpack and Avalanche Discussion:
The Bridger, Madison and Gallatin Ranges, the mountains around Cooke City and the Lionhead area near West Yellowstone:
Yesterday's new snow contained 0.4 inches of snow water equivalent through most of the advisory area. This snow did not provide enough stress to the snowpack to significantly change the danger, but it will keep it from dropping today, and there will be three avalanche problems to address:
1. New wind slabs. Strong winds in some areas readily transported yesterday's snow and formed fresh wind slabs which will easily fracture and avalanche. These wind slabs will be easy to identify and avoid.
2. Buried facets. Dig a snowpit about 4 feet deep. If you hit ground and find depth hoar (photo, video), find a different slope with deeper snow. Slopes with deeper snow will have a thin layer of facets buried about 3 feet deep. Assess this layer. It may be relatively strong on some slopes but do not trust it too much because it remains weak on others and can produce avalanches. Recent snowmobile triggered avalanches along Buck Ridge and on Cedar Mountain near Big Sky are good examples. (photo1, photo2, photo3)
3. Wet snow. On slopes receiving direct sunshine and little wind, the new snow will warm quickly, and wet point releases should occur today. With temperatures below zero this morning, wet snow avalanches will not be a major problem today but could become a greater problem in coming days.
Wind slabs and wet snow avalanches will be relatively easy to avoid. Avoiding avalanches breaking on buried faceted layers will require digging a snowpit and performing stability tests. These layers will most likely produce avalanches on slopes loaded by either last night's winds or very strong winds that blew early this week and last weekend. Today the Avalanche Danger is CONSIDERABLE on all wind-loaded slopes. All other slopes will have a MODERATE Avalanche Danger.
Recent avalanche in Utah
A snowmobiler was caught and buried in an avalanche in Utah on Sunday. He was not wearing a beacon and was buried for about 20 minutes. He was incredibly lucky. Few people buried this long survive. Also, notice a recent avalanche on the adjacent slope. Recent avalanches are clear signs of unstable conditions: http://vimeo.com/38078462.
* * Accident Report * *
The accident reports for the avalanche fatality near Cooke City and the slide on Saddle Peak are now available. See this link.
* * * Last Saturday Francis Skierka from Cut Bank, Montana died in an avalanche in northwestern Montana near Marias Pass. Sadly his wife, Andrea, is pregnant and due in two months. A memorial fund to help Andrea and her baby has been established: The Francis Skierka Family Memorial, Stockman Bank, 125 West Main, Cut Bank MT 59427, 406-873-9400. * * *
The next advisory tomorrow morning at 7:30 a.m. If you have any snowpack or avalanche observations, drop us a line at firstname.lastname@example.org or call us at: 406-587-6984.
For Photos, Videos and More Detailed Information related to this report, Please Visit the Gallatin National Forest Avalanche Center.
~ EVENT ~
Come to Bridger Bowl on Saturday, March 17th (Saint Patrick's Day) with telemark skis, AT skis, alpine skis, snowboards, split boards, or even snow blades. The theme is Snowpocalypse based on the wildly popular Mayan 2012 apocalypse. $30 gets you into the races, a pint glass, t-shirt, a good time, a raffle ticket, and food by Cafe Fresco. Pre-register at Mystery Ranch or Grizzly Ridge: March 11-16. Visit http://pinheadclassic.com/ or the Pinhead Facebook Page for more info.
The Friends of the Avalanche Center installed a Beacon Training Park outside West Yellowstone. It's located south of town on the main snowmobile trail. Stop by and do a quick practice before heading off into the mountains!
EDUCATION, EVENTS, PHOTOS, SNOWPITS, and VIDEOS
3. Check out all our education programs, Click Here.
Information provided by Doug Chabot, Mark Staples, and Eric Knoff from the Gallatin National Forest Avalanche Center. For Events and Education, or Photos and Videos, please visit the Avalanche Centers Website!
If you have any snowpack or avalanche observations, drop them a line at email@example.com or call: 406-587-6984.
For detailed Avalanche Terms utilized here, please see the Avalanche Glossary.
Information provided by Yellowstone National Park, National Weather Service and Gallatin National Forest Avalanche Center
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by John William Uhler
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