No overnight freeze on Friday evening combined with warm daytime temperatures will increase the avalanche hazard throughout the day.
Hazard will rise rapidly when the rain arrives late Saturday.
Large cornices exist on most ridge crests and may be weak as temperatures rise and they bake in the sun. Be aware of your overhead hazard and avoid exposure.
Warm temperatures overnight Friday with a forecasted freezing level of 2600m. On Saturday, morning sun, high freezing levels, and afternoon rain will make wet loose avalanches possible-likely. Expect hazard to rise Saturday evening with 10-20 mm of rain in the forecast.
Solar trigged, loose wet avalanches are likely with high freezing levels, clear skies and no overnight refreeze on Friday night.
A widespread, natural avalanche cycle occurred up to size 4.0 on Mar 19-20 during the atmospheric river filling the valley bottoms with huge debris piles in many locations. Check out pics from this exceptional avalanche cycle in the MIN Reports.
Spring conditions exist through out the park. No overnight crust recovery Friday night will destabilize the snowpack leaving surfaces snow loose and wet.
A thick rain crust from the March atmospheric river sits 20-50cm below the surface.
Below treeline the surface varies from isothermal sticky snow to refrozen tree bombs and huge debris fields from the massive avalanche cycle in March.
A low pressure center brings cooler and wetter condition starting Saturday night.
Tonight Clear periods. Alp low -4°C. Winds Light to 15 Km/h. Freezing level(FZL) 2600m
Sat Rain/Snow starting late in day, 10-20 mm. Alp High 7°C. Light ridge winds. FZL 2700m
Sun Flurries, 12 cm. Alp High 2°C. Light ridge winds. FZL 2200m
Mon Cloudy with flurries, 2-4 cm. Alp High 0°C. Wind SW 15-30km/h. FZL 2200m
