Iowa Environmental Mesonet
Iowa State University Department of Agronomy
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251 WOUS46 KSEW 141924 CCA AVWSEW AVALANCHE WARNING FOR THE OLYMPICS AND NORTH CASCADES NORTHWEST WEATHER AND AVALANCHE CENTER SEATTLE WASHINGTON 1130 AM PST MON DEC 14 2009 THIS STATEMENT APPLIES TO BACKCOUNTRY AVALANCHE TERRAIN BELOW 7000 FEET AND DOES NOT APPLY TO HIGHWAYS OR OPERATING SKI AREAS. && WAZ513-518-519-019-202000- OLYMPICS- WEST SLOPES WASHINGTON CASCADES AND PASSES- 1130 AM PST MON DEC 14 2009 ...AVALANCHE WARNING MONDAY NIGHT AND TUESDAY... COLD WEATHER THE PAST WEEK GENERALLY CREATED WEAK SURFACE SNOW LAYERS. A FRONT SHOULD CAUSE INCREASING STRONG WINDS...INCREASING MODERATE TO HEAVY SNOW AND WARMING TEMPERATURES MONDAY AFTERNOON AND NIGHT. THIS SHOULD BUILD INCREASING DEEP UNSTABLE LAYERS ON SOME SLOPES. NATURAL OR TRIGGERED AVALANCHES SHOULD BECOME LIKELY MONDAY NIGHT AND TO PERSIST TUESDAY MORNING. ANOTHER FRONT IS CURRENTLY EXPECTED TO CAUSE RENEWED HIGH AVALANCHE DANGER TUESDAY AFTERNOON AND TUESDAY NIGHT. THIS STATEMENT WILL BE UPDATED AS CONDITIONS WARRANT. PLEASE VISIT WWW.NWAC.US FOR DETAILS. $$ BACKCOUNTRY TRAVELERS SHOULD BE AWARE THAT ELEVATION AND GEOGRAPHIC DISTINCTIONS ARE APPROXIMATE AND THAT A TRANSITION ZONE BETWEEN DANGERS EXISTS. REMEMBER THERE ARE AVALANCHE SAFE AREAS IN THE MOUNTAINS DURING ALL LEVELS OF AVALANCHE DANGER. CONTACT LOCAL AUTHORITIES IN YOUR AREA OF INTEREST FOR FURTHER INFORMATION. NWAC WEATHER DATA AND FORECASTS ARE ALSO AVAILABLE BY CALLING 206-526-6677 FOR WASHINGTON, 503-808-2400 FOR THE MT HOOD AREA, OR BY VISITING OUR WEB SITE AT WWW.NWAC.US. FERBER/NORTHWEST WEATHER AND AVALANCHE CENTER $$