ISSUED ON February 16 2014 at 12:00 pm
The Flathead Avalanche Center is issuing a Backcountry Avalanche Warning for the Flathead Range and portions of Glacier National Park. New snowfall, warm temperatures, and strong winds have created highly unstable conditions. Natural and human triggered avalanches are likely.The avalanche danger is rated HIGH on all slopes in the Flathead Range and portions of Glacier National Park within the advisory area. Very dangerous avalanche conditions exist. Travel in avalanche terrain is not recommended and avalanche runout zones should be avoided.
This warning will either be terminated or updated by 7:00 a.m. on Monday, February 17.
Since 6:00 pm yesterday evening Flattop Mountain SNOTEL site received 6 inches of new snow and .9” of snow water equivalent. Rising temperatures during the onset of the
system created an upside down storm layer on top of an unstable snow pack. Winds associated with this system also increased into the morning hours. Natural avalanche activity was observed in John F. Stevens Canyon along the southern edge of Glacier Park this morning. Currently temperatures range from 20-27°F and winds are 10-25 mph with gusts into the 50s out of the southwest. Snow Slip remote weather station recorded gusts up to 81 mph early this morning. Tonight another moist system is expected to move into the area with temperatures rising once again and strong winds remaining out the southwest. Portions of the Whitefish and Flathead Ranges could see an additional 8 inches of snow accumulation by the morning.
The avalanche hazard for the Flathead Range and portions of Glacier National Park within the advisory area is HIGH. All other portions of the advisory area have a CONSIDERABLE danger on all slopes. We will update the advisory by 7:00 a.m. tomorrow morning.