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Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Saturday
• 
• High: 63 °
• Low: 43 °
• Chance of Rain

• Sunday
• 
• High: 64 °
• Low: 48 °
• Chance of Rain

• Monday
• 
• High: 64 °
• Low: 50 °
• Chance of Rain

• Tuesday
• 
• High: 64 °
• Low: 46 °
• Chance of Rain

• Wednesday
• 
• High: 59 °
• Low: 46 °
• Chance of Rain

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
950 PM PDT FRI MAY 24 2013

.SYNOPSIS...AN UPPER LEVEL TROUGH IS OVER THE REGION. THIS COOL 
WEATHER PATTERN WILL REMAIN IN PLACE THROUGH NEXT WEEK. A WEATHER 
DISTURBANCE MOVING THROUGH THE UPPER TROUGH WILL MAINLY MOVE INTO 
WESTERN OREGON SATURDAY NIGHT BUT COULD INCREASE THE SHOWER ACTIVITY 
OVER WESTERN WASHINGTON BY SUNDAY MORNING. ANOTHER DISTURBANCE WILL 
PROBABLY REACH THE AREA MONDAY AFTERNOON AND EVENING FOR ANOTHER 
INCREASE IN SHOWERS.

&&

.SHORT TERM...THERE ARE SCATTERED SHOWERS ALONG AND JUST OFF THE 
COAST AND A FEW SOUTH OF THE METRO AREA THIS EVENING. AN UPPER 
TROUGH WILL REMAIN OVER THE PACIFIC NORTHWEST THROUGH THE WEEKEND. 
THERE WILL BE A FEW SHOWERS AT TIMES. THE NAM SHOWS SOME PRECIP 
DEVELOPING SOUTH OF SEATTLE SATURDAY NIGHT...MORE OF A DEFORMATION 
ZONE WITH A PERIOD OF RAIN FOR WESTERN OREGON AND SOUTHWEST WA 
SATURDAY NIGHT. THE UW WRFGFS PUSHES SOME OF THAT RAIN NORTHWARD 
INTO WESTERN WA BUT STILL SOUTH OF A LINE FROM ABOUT CHEHALIS TO THE 
CENTRAL CASCADES SUNDAY MORNING. ANOTHER DISTURBANCE SPREADS SOME 
RAIN TO THE COAST AROUND DAYBREAK MONDAY...AND SOME SHOWERS INTO THE 
INTERIOR OF WESTERN WA MONDAY AFTERNOON AND NIGHT. HE GFS IS SLOWER 
WITH THAT...IT HAS SOME RAIN TO THE COAST MON AFTERNOON AND INTO THE 
INTERIOR OF WESTERN WA MONDAY NIGHT.  

.LONG TERM...NEXT WEEK WILL BE COOL AND UNSETTLED WITH AN UPPER 
TROUGH STILL OVER THE REGION. THERE WILL BE A GOOD CHANCE OF SHOWERS 
AT TIMES WITH CONTINUED BELOW NORMAL TEMPS. 

&&

.AVIATION...WEAK UPPER LEVEL LOW REMAINING OVER WESTERN WASHINGTON 
THROUGH SATURDAY WITH LIGHT LOW LEVEL FLOW. AIR MASS MOIST AND 
SLIGHTLY UNSTABLE. 

WIDE VARIETY OF CEILINGS WILL CONTINUE OVER THE AREA THROUGH 
SATURDAY. IN GENERAL...CEILINGS IN THE 4000 TO 6000 FOOT RANGE WITH 
CEILINGS AS LOW AS 1500 FEET NEAR SHOWERS. CEILINGS LOWERING IN THE 
12Z-18Z TIME FRAME AROUND 3000 TO 4000 FEET WITH CONTINUED LOWER 
CEILINGS IN THE VICINITY OF SHOWERS.

KSEA...S WIND 6 TO 10 KNOTS FOR NEXT 24 HOURS. MAINLY VFR CIGS 
EXPECTED...DROPPING TO MVFR BRIEFLY DURING SHOWERS. FELTON

&&

.MARINE...SMALL CRAFT ADVISORY FOR THE CENTRAL STRAIT WILL COME TO 
AN END OVERNIGHT AS GRADIENTS WEAKEN. LIGHT GRADIENTS LATER TONIGHT 
INTO SATURDAY. WEAK SURFACE LOW OVER THE OFFSHORE WATERS 
TONIGHT WILL MOVE SOUTHEAST AND DISSIPATE ON SATURDAY WITH ONSHORE 
FLOW DEVELOPING ON SUNDAY. THE NEXT ORGANIZED FRONT REACHES THE 
WATERS ON MONDAY WITH SMALL CRAFT WINDS PROBABLE OVER THE COASTAL 
WATERS. FELTON

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...NONE.
PZ...SMALL CRAFT ADVISORY FOR CENTRAL AND EASTERN STRAIT FROM 5 PM 
     PDT UNTIL LATE TONIGHT.

&&

$$