####018003623#### WWUS86 KPQR 131829 SABOR Summary Avalanche Forecast for Mt Hood area Northwest Weather and Avalanche Center Seattle Washington 1029 AM PST Mon Feb 13 2012 This forecast applies to back country avalanche terrain below 7000 feet and does not apply to developed ski areas or highways. Avalanche Forecast Monday and Monday night: Moderate avalanche danger on north through east exposures above 6000 feet early Monday with a slight increase on any slopes receiving sunshine mid-day and Monday afternoon, otherwise mostly low avalanche danger elsewhere. Danger decreasing overnight. Tuesday and Tuesday night: Moderate avalanche danger above 6000 feet...on steeper lee terrain receiving wind transport Tuesday afternoon...and on any slopes receiving sun breaks in the afternoon, otherwise low avalanche danger Tuesday. Danger decreasing Tuesday night. Snowpack Synopsis After almost a week of dry and relatively mild conditions above a weak temperature inversion near the Cascade passes and at lower elevations along the Cascade east slopes in early February, several weak weather systems moved through the region mid-late last week thru Sunday while further weakening in a strong split flow left behind by the departing ridge. With slow settlement, intermittent crust formation and some loose or wet loose slide activity accompanying associated intermittent light rain or snow, fluctuating freezing levels, and some brief sun breaks...these disturbance resulted in mostly stable but highly variable surface snow conditions, depending on aspect, elevation and time of day. All of these layers have received a dusting of new snow overnight and early Monday, ranging from a trace up to 1-2 inches. Such minor new snowfall has not significantly affected the existing mainly low avalanche danger. Monday and Monday night Decreasing light snow or snow showers are expected Monday morning, with scattered light showers and some sun breaks Monday afternoon and partly cloudy weather amid a few light flurries Monday night. Along with relatively low freezing levels and only light winds, this weather should produce a slight danger increase on any sun exposed terrain during the later morning and afternoon hours and a slightly decreasing danger Monday night. Tuesday and Tuesday night Increasing clouds are expected Tuesday morning as the next splitting storm approaches the area before plunging southward along the coast Tuesday afternoon and night. This should result in light snow showers or occasional light snow later Tuesday morning and afternoon. Once again only very light snow amounts are likely, mostly ranging from a trace to an inch or two. However, a slight danger increase is possible on any slopes receiving sun or filtered sunshine between showers and on any higher elevation lee terrain receiving wind transport from the briefly increasing easterly winds later Tuesday morning and afternoon. With decreasing showers and a slow clearing trend expected Tuesday night, a slight decrease in the danger is expected. NWAC weather data and forecasts are also available by calling 206-526-6677 for Washington, 503-808-2400 for the Mt Hood area, or by visiting our Web site at www.nwac.us. Moore/Northwest Weather and Avalanche Center Seattle Washington References 1. http://www.nwac.us/####018003790#### WWUS86 KSEW 131829 SABWA Summary Avalanche Forecast for Olympics and Washington Cascades Northwest Weather and Avalanche Center Seattle Washington 1029 AM PST Mon Feb 13 2012 This forecast applies to back country avalanche terrain below 7000 feet and does not apply to developed ski areas or highways. Avalanche Forecast Olympics- Washington Cascades- Monday and Monday night: Moderate avalanche danger on north through east exposures above 6000 feet early Monday with a slight increase on any slopes receiving sunshine mid-day and Monday afternoon, otherwise mostly low avalanche danger elsewhere. Danger decreasing overnight. Tuesday and Tuesday night: Moderate avalanche danger above 6000 feet...on steeper lee terrain receiving wind transport Tuesday afternoon...and on any slopes receiving sun breaks in the afternoon, otherwise low avalanche danger Tuesday. Danger decreasing Tuesday night. Snowpack Synopsis After almost a week of dry and relatively mild conditions above a weak temperature inversion near the Cascade passes and at lower elevations along the Cascade east slopes in early February, several weak weather systems moved through the region mid-late last week thru Sunday while further weakening in a strong split flow left behind by the departing ridge. With slow settlement, intermittent crust formation and some loose or wet loose slide activity accompanying associated intermittent light rain or snow, fluctuating freezing levels, and some brief sun breaks...these disturbance resulted in mostly stable but highly variable surface snow conditions, depending on aspect, elevation and time of day. All of these layers have received a dusting of new snow overnight, ranging from a trace up to 1-3 inches. However, such minor new snowfall has not significantly affected the existing mostly low avalanche danger. Monday and Monday night Decreasing light snow or snow showers are expected Monday morning, with scattered light showers and some sun breaks Monday afternoon and partly cloudy weather amid a few light flurries...mostly south...Monday night. Along with relatively low freezing levels and only light winds, this weather should produce a slight danger increase on any sun exposed terrain during the later morning and afternoon hours and a slightly decreasing danger Monday night. Tuesday and Tuesday night Increasing clouds are expected Tuesday morning as the next splitting storm approaches the area before plunging southward along the coast Tuesday afternoon and night. This should result in occasional light snow later Tuesday morning and afternoon in the Olympics and south-central Cascades with snowfall dwindling to light snow showers in the north. Once again only very light snow amounts are likely, mostly ranging from a trace to an inch or two. However, a slight danger increase is possible on any slopes receiving sun or filtered sunshine between showers and on any higher elevation lee terrain receiving wind transport from the briefly increasing easterly winds later Tuesday morning and afternoon. With decreasing showers and slow clearing expected Tuesday night, this should produce a slight decrease in the danger. NWAC weather data and forecasts are also available by calling 206-526-6677 for Washington, 503-808-2400 for the Mt Hood area, or by visiting our Web site at www.nwac.us. Moore/Northwest Weather and Avalanche Center Seattle Washington References 1. http://www.nwac.us/