Area Forecast Discussion
Issued by NWS Seattle/Tacoma, WA

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FXUS66 KSEW 281042
AFDSEW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
335 AM PDT TUE JUL 28 2015

.SYNOPSIS...AN UPPER LEVEL RIDGE WILL BUILD OVER THE PACIFIC
NORTHWEST THROUGH THE WEEKEND. SUNNY DAYS AND ABOVE NORMAL
TEMPERATURES WILL RETURN TO THE REGION THROUGH THE WEEKEND.

&&

.SHORT TERM...BUILDING UPPER LEVEL HEIGHTS WILL BRING DRY AND WARM
WEATHER BACK TO THE REGION TODAY. LOW LEVEL CLOUDS TONIGHT WILL BE
LIMITED MAINLY TO THE COAST...HELPING TEMPERATURES WARM TO THE LOW
TO MID 80S OVER THE INTERIOR TODAY...RUNNING A 4 TO 5 DEGREES ABOVE
NORMAL. HIGH TEMPERATURES WILL RISE INTO THE UPPER 80S WEDNESDAY AND
A BIT WARMER THURSDAY WITH MANY LOCATIONS ESPECIALLY OVER THE
SOUTHWEST INTERIOR REACHING INTO THE LOW 90S.

.LONG TERM...THE VERY PERSISTENT AND BROAD UPPER LEVEL RIDGE WILL
KEEP TEMPERATURES WARM THROUGH THE WEEKEND WITH HIGH TEMPERATURES
WORKING INTO THE LOW 90S THROUGH THE CENTRAL SOUND AND MID 90S OVER
THE SOUTH INTERIOR. TEMPERATURES WILL BE CONSIDERABLY COOLER ALONG
THE COAST...BUT STILL ABOVE NORMAL...REACHING INTO THE LOWER TO MID
70S.

&&

.AVIATION...UPPER LEVEL RIDGE OVER WESTERN WASHINGTON. NORTHWESTERLY
FLOW ALOFT BECOMING WESTERLY THIS EVENING. LIGHT FLOW IN THE LOWER
LEVELS. AIR MASS STABLE.

SATELLITE IMAGERY LOW CLOUDS CONFINED TO THE NORTH COAST EARLY THIS
MORNING. SURFACE GRADIENTS ARE FLAT AND WINDS IN THE LOWER LEVELS
ARE NORTHWESTERLY WHICH WILL KEEP THE STRATUS AWAY FROM THE INTERIOR
THIS MORNING. EVEN ALONG THE COAST THE MARINE LAYER IS SHALLOW AND
WILL BURN OFF BY MID TO LATE MORNING. OUTSIDE OF THE STRATUS ALONG
THE COAST THIS MORNING JUST SOME HIGH CLOUDS MOVING THROUGH THE AREA
AT TIMES TODAY.

KSEA...JUST SOME HIGH CLOUDS AT TIMES TODAY. WINDS MOSTLY NORTHERLY
5 TO 9 KNOTS. THERE IS A CHANCE THE WINDS COULD GO VARIABLE FOR A A
COUPLE OF HOURS BETWEEN 14Z-18Z. FELTON

&&

.MARINE... HIGH PRES OFFSHORE WITH LOWER PRES EAST OF THE CASCADES
WILL KEEP THE FLOW ONSHORE INTO THE WEEKEND. THE EXCEPTION WILL BE
DURING THE MORNING HOURS THURSDAY THROUGH SATURDAY WITH THERMALLY
INDUCED LOW PRESSURE ALONG THE COAST CREATING LIGHT LOW LEVEL FLOW.
SMALL CRAFT ADVISORY WESTERLIES ARE EXPECTED IN THE CENTRAL AND
EASTERN STRAIT TONIGHT. FELTON

&&

.SEW WATCHES/WARNINGS/ADVISORIES... WA...NONE. PZ...SMALL CRAFT
ADVISORY IN EFFECT CENTRAL AND EASTERN STRAIT OF JUAN DE FUCA
TONIGHT.

&&

$$

WWW.WEATHER.GOV/SEATTLE

AN ILLUSTRATED VERSION OF THIS FORECAST DISCUSSION CAN BE SEEN AT
WWW.WEATHER.GOV/SEATTLE/GAFD/LATEST_WEBAFD.HTML



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