Friday January 25, 2019

Sunday January 27, 2019
Saturday January 26, 2019
Friday January 25, 2019
Confidence: High - Stable high pressure outlook.

Main Concerns

Cornice Fall, Loose Wet - view Avalanche Problems for detailed information.

Travel & Terrain Advice

Avoid cornice exposure above and below. Temperatures will rise with elevation, and conditions will change rapidly with alpine and treeline warming. Trees, rocks and steep terrain above will begin to shed snow and could affect lower elevations.

Avalanche Summary

Avalanche control at Mount Washington on Wednesday produced numerous size 1-1.5 storm slabs on all aspects below 1600 m. These avalanches ranged in depth from 15-70 cm and ran on buried surface hoar. Wind affected areas were more stubborn, requiring a moderate load and sheltered terrain was easily triggered with a light load.

Avalanche Problems

Cornice Fall

Cornices may possibly fail with warm temperatures and solar input. NW-NE aspect treeline and alpine to size 2.

Loose Wet

Warm temperatures will almost certainly produce loose wet avalanches on all aspects and elevations to size 1-1.5

Snowpack Summary

Surface hoar development in below treeline areas, wind and sun affected surfaces in exposed areas. Well settled snow pack.

Snowpack Details

SurfaceSurface hoar in fog bands, wind affected storm snow and moist solar aspect surfaces elsewhere.
UpperWell settled.
MidWell settled.
LowerWell settled and dense.

Past Weather

Inversions above 1000 m. Light winds and no precipitation.

Weather Forecast

FRIDAY - Trace precipitation with freezing levels to 2500 m. Moderate W wind.

SATURDAY - No precipitation with freezing levels to 2900 m. Moderate SW wind.

SUNDAY - No precipitation with freezing levels to 2600 m. Moderate variable wind.

Posted on Friday January 25, 2019 by Dan Goodwin

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