Sunday, May 14, 2017

Special Weather Statement - National Weather Service

Updated just this morning:

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 5 PM PDT TUESDAY...

The National Weather Service in Seattle has issued a Winter Weather Advisory for snow, which is in effect from 6 PM this evening to 5 PM PDT Tuesday.

SNOW ACCUMULATIONS

Up to 6 inches tonight with another 4 to 6

SNOW LEVELS

Around 4500 feet tonight lowering to 3500 feet on Tuesday.
SOME AFFECTED LOCATIONS
  • Stevens Pass
  • White Pass
  • The road to Paradise on Mount Rainier. Back country above 4500 feet from Stevens Pass southward.
TIMING
 
The heaviest snow is expected tonight with snow showers continuing through Tuesday.
 
MAIN IMPACT
 
Travel may be difficult across the higher passes like Stevens Pass and White Pass and the road to Paradise on Mount Rainier. Back country hikers should be prepared for winter conditions. A Winter Weather Advisory for snow means that periods of snow will cause primarily travel difficulties. Be prepared for snow covered roads and limited visibilities, and use caution while driving.
 
Earlier Warning...

The National Weather Service has issued a special weather statement.  Here is the text:

SIGNIFICANT SNOWFALL POSSIBLE IN THE MOUNTAINS MONDAY EVENING THROUGH TUESDAY

AN UNSEASONABLY STRONG AND COOL LOW PRESSURE SYSTEM WILL SPREAD APPRECIABLE RAIN AND SNOW INTO THE CASCADES LATE MONDAY AFTERNOON THROUGH MUCH OF TUESDAY.

SNOW LEVELS MAY FLUCTUATE BETWEEN 4500 TO 5500 FEET MONDAYEVENING WHICH COULD INITIALLY LIMIT MOST SNOW ACCUMULATION TO JUST THE HIGHER ELEVATIONS ABOVE 5500 FEET.

COLDER AIR WILL ARRIVE LATER MONDAY NIGHT INTO TUESDAY WITH SNOW LEVELS FALLING TO 4000 FEET OR POSSIBLY LOWER. AT THIS TIME IT APPEARS THAT ELEVATIONS ABOVE 5000 TO 5500 FEET WILL GET THE HIGHEST SNOW AMOUNTS LIKELY A FOOT OR MORE BY TUESDAY AFTERNOON.

HIGHER PASSES SUCH AS STEVENS AND SKI RESORTS WILL ALSO SEE SOME SNOWFALL BUT AMOUNTS ARE MORE UNCERTAIN.

24 HOUR TOTALS UP TO 5 INCHES AT STEVENS PASS AND UP TO 10 Inches AT SOME SKI AREAS AND INCLUDING PARADISE ARE POSSIBLE.

LOCALLY HIGHER AMOUNTS COULD ALSO OCCUR. FORECASTS SHOULD BE MONITORED CLOSELY ESPECIALLY IF PLANNING ANY TRAVEL OVER THE PASSES OR INTO THE HIGHER CASCADES.

Indeed, it does look challenging.  Think of it as preserving good spring conditions...