Small Craft Advisory 782, NWS Seattle, WA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
900 PM PDT WED JUL 27 2011

.SYNOPSIS...ONSHORE FLOW WILL KEEP HIGH TEMPERATURES NEAR TO
SLIGHTLY BELOW NORMAL WITH NIGHT AND MORNING CLOUDS AND AFTERNOON
SUNSHINE FOR MUCH OF THE NEXT WEEK.

&&

.SHORT TERM...STRATUS BURNED OFF ACROSS MOST OF WRN WA THIS
AFTERNOON AS ONSHORE FLOW REMAINS WEAK. HIGH PRES ALOFT WILL MOVE
OVER THE AREA LATER TONIGHT AND THU KEEPING THE AREA DRY. RESIDUAL
LOW LEVEL MOISTURE WILL ALLOW FOR STRATUS TO REFORM OVER PARTS OF
THE INTERIOR EARLY THU BUT THIS SHOULD QUICKLY BURN OFF BY LATE
MORNING. A VERY WEAK TROUGH WILL BRUSH THE AREA THU NIGHT. THIS WILL
INCREASE ONSHORE FLOW AND POSSIBLY PRODUCE SOME AREAS OF DRIZZLE
ACROSS THE AREA FRI MORNING. HIGHER PRESSURE ALOFT BUILDS OVER THE
AREA LATER FRI INTO SAT FOR DRY CONDITIONS AND LESS CLOUDS. HIGH
TEMPS WILL RUN NEAR OR SLIGHTLY BELOW AVERAGE THE NEXT FEW DAYS.
MERCER

.LONG TERM...PREVIOUS DISCUSSION...A BROAD UPPER TROUGH WILL BE OVER
THE AREA INTO THE MIDDLE OF NEXT WEEK WITH CONTINUED MODERATE LOW
LEVEL ONSHORE FLOW. UPPER HEIGHTS WILL BE FAIRLY HIGH AND MOST OF
THIS PERIOD SHOULD BE DRY WITH SEASONABLE TEMPERATURES. A SHORT WAVE
COULD BRING A FEW SHOWERS OR DRIZZLE AROUND WEDNESDAY. SCHNEIDER

&&

.AVIATION...NORTHWEST FLOW ALOFT WILL BECOME WEST THURSDAY NIGHT AND
FRIDAY. A WEAK UPPER RIDGE WILL MOVE OVER WA TONIGHT BUT FLATTEN
QUICKLY AND THEN AN UPPER TROUGH WILL MOVE INTO BRITISH COLUMBIA.
SOME BKN060 OVER THE CENTRAL AND SOUTH SOUND...BUT IT SHOULD GO SCT
LATER THIS EVENING. THE UPPER LEVEL HEIGHTS OVER WA DO NOT FALL OFF
MUCH TIL THU NITE AND FRI...BUT EVEN THE GFS KEEPS THE 576 CONTOUR
NEAR THE BORDER WITH BRITISH COLUMBIA. NOT MUCH IS LIKELY TO COME OF
THIS EXCEPT STRONGER ONSHORE FLOW THU NITE WITH MORE MORNING CLOUDS
FRIDAY MORNING THAN THERE WILL BE THURSDAY MORNING. 19/13

KSEA...LIGHT NLY BREEZE AND BKN060 BECOMING SCT BY MIDNIGHT. THERE
MAY BE A FEW HOURS OF MORNING LOW CLOUDS AROUND DAYBREAK THURSDAY
BUT FRIDAY MORNING IS A BETTER BET FOR MORE SIGNIFICANT MORNING
STRATUS.

&&

.MARINE...TYPICAL SUMMER REGIME OF MODERATE ONSHORE FLOW WILL
CONTINUE THROUGH THE WEEKEND WITH SMALL CRAFT ADVISORY WEST WINDS
EXPECTED IN THE STRAIT EACH EVENING. THERE IS THERMALLY INDUCED LOW
PRESSURE AREA OVER CALIFORNIA...BUT IT IS NOT EXPECTED TO EXTEND TOO
MUCH UP THE OREGON COAST THESE NEXT FEW DAYS. RACE ROCKS WILL
PROBABLY REACH GALE FORCE WEST WINDS THURSDAY EVENING...AND PERHAPS
AGAIN SUNDAY EVENING...FOR THAT MATTER RACE ROCKS COULD TOUCH 34KT
FOR AN HOUR ANY GIVEN NIGHT BUT THE FORECAST LOOKS LIKE IT IS IN
GOOD SHAPE FOR NOW. 19/13

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...NONE.
PZ...SMALL CRAFT ADVISORY CENTRAL AND EAST STRAIT.

&&

WWW.WEATHER.GOV/SEATTLE

FOR THE GRAPHICAL FORECAST DISCUSSION...PLEASE GO TO
WWW.WRH.NOAA.GOV/SEW/GAFD/LATEST_WEBAFD.HTML