GNFAC Avalanche Forecast
GNFAC Avalanche Forecast
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GNFAC Avalanche Forecast for Sun Apr 13, 2025
1 seconds Posted Apr 13, 2025 at 12:27 pm.
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Classic spring weather yesterday afternoon delivered snow in the mountains and rain in the valleys accompanied by lightning and thunder.
10” snow (1.1” water) - Cooke City Area
6” snow (0.8” water) - northern Gallatin Range
2-3” snow (0.2-0.3” water) - Bridger Range and Big Sky area
Temperatures plummeted overnight and range from around  20° F in the Bridgers to low-mid teens F most other places to single digits F at the highest elevations. Strong ridgetop winds during snowfall yesterday blew 20 mph gusting 40-50 changing directions quickly from S to W to NW. Winds have eased this morning.
Today cold air and lingering clouds will remain over the area with a few snowflakes falling in the Bridgers. The sun should start peeking out this afternoon bringing high temps into the mid 30s F in the Bridgers and low to mid 20s F near Big Sky and Cooke City. There will be clear skies and plenty of sunshine near West Yellowstone and Island Park with high temps approaching 30° F. Winds from the WNW will blow in the low teens but could remain a bit gusty in the Bridgers.
Looking ahead - A ridge of high pressure brings warm, dry weather Monday & Tuesday. Another trough descends from Canada bringing more snow and cold air on Thursday. The fight between winter and summer continues.