This is Tony Willits with the backcountry avalanche advisory issued by the U.S. Forest Service Glacier Country Avalanche Center at 7:30 AM, Friday, January 23rd, 2004, for the Glacier Park and Flathead and Kootenai National Forest areas. HAZARD ANALYSIS We are currently rating the avalanche danger as MODERATE on steep, open slopes between the elevations of 5,500 7,500 ft. Below 5,500 ft the danger rating is LOW. These danger ratings expire at midnight, Friday, January 23rd, 2004. The outlook Friday through Monday is for the avalanche danger to increase if the predicted weather system materializes with the snow accumulations and winds that are expected. Because of the general nature of this advisory message each backcountry party will always need to make their own time and site specific avalanche hazard evaluations. WEATHER ANALYSIS: Since Tuesday the weather over Northwestern Montana has remained mild. Little to no snow fall from Tuesday to Thursday AM. Although most all the sites have picked up one to three tenths since midnight with the exception of the Cabinets and the Purcells. Temperatures ranged from the upper twenties for the maximums and low twenties for the minimums. Winds have been variable especially in the Middle Fork since Tuesday and picked up out of the SW on Thursday when winds were 12 to 15 mph with gusts to 30 mph out of the SW . SNOWPACK ANALYSIS: Our backcountry observations Thursday were on Cable Mountain in the East Cabinet Range on the Kootenai National Forest and from Werner Peak on the Whitefish Divide. We also had reports on Wednesday from a bowl near Essex and the Crystal Creek drainage just north of Columbia Falls. The snow pack continues to settle and consolidate. Snowpit observations revealed the greatest instability with the shallow surface layers. Currently snow pack strength is building in the deeper snow packs although there still is instability in the shallow snow packs associated with higher elevation windward slopes. The deeper snow packs were revealing moderate shears with shallow packs revealing some easy shears over faceted layers. Cutting into the faceted layers over these shallow snowpacks especially with snowmobiles could result in triggering slide activity. Make investigations specific to the areas you will be traveling. AVALANCHE - INSTABILITY DESCRIPTION: Between 5,500 and 7,500 ft we are currently rating the avalanche danger as MODERATE on steep, open slopes. Unstable slab layers are possible on all steep aspects. Natural avalanches are unlikely, while human triggered avalanches are possible. Backcountry travelers should use caution in steeper terrain, particularly on cold or recently wind loaded slopes. Below 5,500 ft across the region we are rating the avalanche danger as LOW. Snow there is generally stable with only isolated areas of instability. Natural avalanches are very unlikely, while human triggered avalanches are unlikely. Backcountry travel is generally safe. Normal caution is advised. . WEATHER FORECAST & AVALANCHE OUTLOOK: [29]Current Western Montana National Weather Service Backcountry Weather Forecast A potent storm has started to move across Western Montana early this morning. Snowfall is expected to be heavy at times over the upper elevations. Snowfall amounts could range from 6 to 12 inches by Saturday morning. Numerous snow showers will remain in the wake of this system as a cold arctic airmass settles into our region Saturday night. With this arctic air mass expect the continuation of snow in the mountains through the middle of next week. These conditions should escalate the avalanche danger to the considerable level and possibly higher in areas with heavy accumulations and wind loading. Initially winds are expected to load from the W/SW but likely wind direction changes on Saturday which could come from the North. Pay attention to wind loading resulting from this weather systems arrival. Backcountry travelers will need to remain alert for the effects of this new storm in areas they will traverse. The next regularly scheduled update of this advisory message will be on Tuesday, January 27th, 2004. Please note that this avalanche advisory is our best interpretation of snow pack conditions and National Weather Service forecasts on the day the advisory is issued. Unanticipated weather changes such as wind, a marked temperature increase, or precipitation beyond forecast amounts can increase the avalanche danger. Local variations may also exist.