Area Forecast Discussion
Issued by NWS Seattle/Tacoma, WA

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FXUS66 KSEW 032135 CCA
AFDSEW

AREA FORECAST DISCUSSION...CORRECTION
NATIONAL WEATHER SERVICE SEATTLE WA
300 PM PDT FRI JUL 3 2015

.SYNOPSIS...SUNNY DAYS WITH WELL ABOVE AVERAGE HIGH TEMPERATURES
WILL CONTINUE INTO THE MIDDLE OF NEXT WEEK. AN UPPER TROUGH AND
COOLER AIR MAY ARRIVE TOWARD THE END OF NEXT WEEK.

&&

.SHORT TERM...RATHER WARM WEATHER WILL CONTINUE THROUGH THE MIDDLE
OF NEXT WEEK. THE 4TH SHOULD BE ABOUT THE SAME AS TODAY IN TERMS OF
TEMPS AND BREEZES...BUT SUNDAY SHOULD BE THE WARMEST DAY AS THE
THERMAL TROF SHIFTS OUT OVER THE COASTAL WATERS. THERE IS AN UPPER
LOW OVER CANADA AND A LITTLE UPPER LEVEL CYCLONIC FLOW OVER B.C. AND
ALBERTA INTRUDES OVER WA THIS WEEKEND...BUT IT DOES NOT HAVE ANY
EFFECT ON THE WARM AIR OVER WRN WA.

.LONG TERM...THERE WILL BE LITTLE CHANGE TO THE WEATHER PATTERN
THROUGH THE MIDDLE OF NEXT WEEK...THE AIR WILL REMAIN RATHER WARM
AND MARINE AIR WILL BE SHALLOW AND MAINLY CONFINED TO THE COAST. THE
FORECAST HIGHS WERE MAINLY WARMED UP A NOTCH THROUGH WEDNESDAY. THE
UPPER LEVEL LOW OFF CALIF IS LIKELY TO STAY SOUTH OF OUR AREA AND
ANY INSTABILITY AND CHANCE OF SHOWERS SHOULD ONLY WORK AS FAR NORTH
AS OREGON AT TIMES. FOR THE END OF NEXT WEEK AND INTO NEXT WEEKEND A
COOL UPPER TROUGH MAY ARRIVE.

&&

.AVIATION...STRONG HIGH PRESSURE REMAINS OFFSHORE WHILE AN UPPER
LEVEL LOW SPINS OVER NORTHERN B.C. AND ALBERTA. THE FLOW ALOFT OVER
WESTERN WA IS W/NW. THE AIR MASS IS DRY. SKIES ARE CLEAR FOR VFR
CONDITIONS THIS EVENING. HOWEVER...A WEAK ONSHORE PUSH WILL BRING
MARINE STRATUS CLOUDS BACK TO THE COAST OVERNIGHT. HIGH PRES AND
OFFSHORE FLOW WILL LEAD TO VFR CONDITIONS ON SAT. 33

KSEA...VFR CONDITIONS. LIGHT N WINDS AT THE SURFACE. 33

&&

.MARINE...STRONG HIGH PRES REMAINS OVER THE NE PAC WITH SLIGHTLY
LOWER PRES INLAND. THE RESULT IS LIGHT ONSHORE FLOW ACROSS WESTERN
WA. MODELS SHOW N/NW WINDS OF 15 TO 25 KT OVER THE OUTER COASTAL
WATERS - A SMALL CRAFT ADVISORY IS IN EFFECT. WESTERLY WINDS WILL
ALSO INCREASE THROUGH THE CENTRAL/EAST STRAIT OF JUAN DE FUCA THIS
AFTERNOON AND EVENING AND A SMALL CRAFT ADVISORY IS IN EFFECT AS
WELL.

OFFSHORE FLOW WILL DEVELOP THIS WEEKEND AS A THERMAL TROUGH OF LOW
PRES FORMS ALONG THE COAST. THE FLOW WILL FLIP BACK TO ONSHORE ON
MONDAY AS LOW PRES SHIFTS INLAND. 33

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...HEAT ADVISORY FOR SEATTLE...BELLEVUE...TACOMA...AND EAST PUGET
     SOUND LOWLANDS ZONES.
PZ...SMALL CRAFT ADVISORY OUTER COASTAL WATERS...CENTRAL AND EAST
     STRAIT OF JUAN DE FUCA.

&&

$$

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