811  
WWUS46 KSEW 170356  
WSWSEW  
 
URGENT - WINTER WEATHER MESSAGE  
NATIONAL WEATHER SERVICE SEATTLE WA  
856 PM PDT MON APR 16 2018  
 
WAZ569-170700-  
/O.CON.KSEW.WS.W.0009.000000T0000Z-180417T0700Z/  
CASCADES OF PIERCE AND LEWIS COUNTIES-  
856 PM PDT MON APR 16 2018  
 
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT PDT  
TONIGHT ABOVE 3000 FEET...  
 
* WHAT...HEAVY SNOW. ADDITIONAL SNOW ACCUMULATIONS OF 3 TO 6  
INCHES ARE EXPECTED. TOTAL SNOW ACCUMULATIONS OF 12 TO 18  
INCHES.  
 
* WHERE...CASCADES OF PIERCE AND LEWIS COUNTIES.  
 
* WHEN...UNTIL MIDNIGHT PDT TONIGHT.  
 
* ADDITIONAL DETAILS...PLAN ON DIFFICULT TRAVEL CONDITIONS. TREE  
BRANCHES COULD FALL. BE PREPARED FOR SIGNIFICANT REDUCTIONS IN  
VISIBILITY AT TIMES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER STORM WARNING FOR SNOW MEANS SEVERE WINTER WEATHER  
CONDITIONS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. IF YOU  
MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD AND WATER IN YOUR  
VEHICLE IN CASE OF AN EMERGENCY. THE LATEST ROAD CONDITIONS FOR  
THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY CALLING 5 1 1.  
 

 
 

 
 
WAZ567-568-171200-  
/O.CON.KSEW.WW.Y.0032.000000T0000Z-180417T1200Z/  
CASCADES OF WHATCOM AND SKAGIT COUNTIES-  
CASCADES OF SNOHOMISH AND KING COUNTIES-  
856 PM PDT MON APR 16 2018  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM PDT  
TUESDAY ABOVE 3000 FEET...  
 
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS OF 3 TO 6 INCHES,  
WITH LOCALIZED AMOUNTS UP TO 10 INCHES, ARE EXPECTED. TOTAL SNOW  
ACCUMULATIONS OF 4 TO 12 INCHES ARE EXPECTED.  
 
* WHERE...CASCADES OF WHATCOM AND SKAGIT COUNTIES AND CASCADES  
OF SNOHOMISH AND KING COUNTIES.  
 
* WHEN...UNTIL 5 AM PDT TUESDAY.  
 
* ADDITIONAL DETAILS...PLAN ON SLIPPERY ROAD CONDITIONS. BE  
PREPARED FOR REDUCED VISIBILITIES AT TIMES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER WEATHER ADVISORY FOR SNOW MEANS PERIODS OF SNOW WILL  
CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED  
ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE DRIVING.  
THE LATEST ROAD CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN  
BE OBTAINED BY CALLING 5 1 1.  
 

 
 

 
 
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