AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
140 PM PDT MON JUL 2 2018

.SYNOPSIS...TEMPERATURES WILL COOL ACROSS THE INTERIOR THROUGH MID
WEEK, AND THEN WARM AGAIN THIS WEEKEND. NO RAINFALL IS EXPECTED
DURING THE NEXT SEVEN DAYS.

&&

.DISCUSSION...AN UPPER RIDGE CONTINUES TO DOMINATE THE E PACIFIC,
WITH VERY WARM TEMPERATURES ONCE AGAIN OVER THE INTERIOR OF NW
CALIFORNIA. THE PATTERN WILL CHANGE OVER THE NEXT FEW DAYS AS THE
RIDGE RETROGRADES WESTWARD AND AN UPPER TROUGH DIGS S OVER THE W
COAST OF THE U.S. THIS WILL LEAD TO A PRONOUNCED COOLING OF
TEMPERATURES ACROSS INLAND LOCATIONS, PARTICULARLY WITH RESPECT TO
DAYTIME HIGHS. MAXIMUM TEMPERATURES IN THE 90S OVER PARTS OF THE
INTERIOR THIS AFTERNOON WILL DROP INTO THE MID 80S BY WEDNESDAY
THROUGH FRIDAY. A LARGE UPPER LOW WILL DEEPEN AND DROP TO NEAR
41N/132W WEDNESDAY NIGHT BEFORE FILLING LATER IN THE WEEK.

MOISTURE FROM FORMER TROPICAL DEPRESSION EMILIA AND, LATER,
HURRICANE FABIO WILL BE TAPPED BY SW FLOW AHEAD OF THE
AFOREMENTIONED TROUGH BEFORE IT RETREATS, BRINGING AN INCREASE IN
CLOUDS TO THE NW PORTION OF THE AREA ON WEDNESDAY AND THURSDAY.
ALTHOUGH CHANCES FOR RAIN WILL BE NON-ZERO OVER THE N COASTAL AREAS,
HAVE CONTINUED TO KEEP A DRY FORECAST FOR THE AREA THROUGH THE
PERIOD. THERE IS ALSO THE POTENTIAL FOR SOME LIGHT DRIZZLE ALONG
WITH PATCHY FOG ALONG THE LOWER REDWOOD COAST TUESDAY NIGHT AND
WEDNESDAY MORNING. COASTAL LOW CLOUDS WILL GENERALLY DEVELOP
OVERNIGHT AND DISSIPATE FROM THE LAND-BASED EDGES EACH MORNING.
THESE CLOUDS WILL MAKE THEIR FARTHEST INLAND PENETRATION TUESDAY
NIGHT AND WEDNESDAY MORNING AS THE MARINE LAYER DEEPENS, BUT STILL
SHOULD BE ABLE TO ERODE DURING THE AFTERNOON WITH THE STRONG DAYTIME
HEATING.

TEMPERATURES ARE EXPECTED TO RETURN TO ABOVE NORMAL LEVELS OVER THE
INTERIOR BY THIS WEEKEND, WHILE NEAR SEASONAL VALUES ARE EXPECTED
ALONG THE COAST. /SEC

&&

.AVIATION...MOSTLY CLEAR SKIES PREVAIL ACROSS THE AREA, AND THIS
SHOULD GENERALLY HOLD FOR THE NEXT 24 HOURS. HIGH RESOLUTION MODEL
GUIDANCE INDICATES SOME MOISTURE POOLING POSSIBLE N OF CAPE
MENDOCINO AND INTO PORTIONS OF THE EEL RIVER VALLEY LATER TONIGHT,
BUT IT DOESN`T APPEAR THAT THIS WILL HAVE MUCH IMPACT AT THE REDWOOD
COAST AIRPORTS. LIKEWISE, KUKI IS EXPECTED TO REMAIN VFR OVERNIGHT.
N WINDS WILL BE QUITE GUSTY ALONG THE REDWOOD COAST INTO THE EVENING
HOURS, AND KCEC MAY REMAIN SOMEWHAT GUSTY ALL NIGHT LONG. IF THE
SURFACE WINDS DROP OFF MORE THAN EXPECTED AT KCEC, THERE MAY BE A
PERIOD OF MARGINAL LOW-LEVEL WIND SHEAR LATER TONIGHT. KACV IS
EXPECTED TO MOSTLY DECOUPLE BEFORE MIDNIGHT. WINDS AT KUKI ARE
EXPECTED TO BE MOSTLY LIGHT. /SEC

&&

.MARINE...N WINDS WILL REMAIN STEADY OR INCREASE A BIT THROUGH
THIS EVENING WITH GALES CONTINUING IN THE OUTER WATERS INTO
TUESDAY. WILL CONTINUE THE EXISTING HEADLINES, WITH THE OUTER
WATERS GALE WARNING CONTINUING THROUGH TUESDAY AFTERNOON AND THE
INNER WATERS SMALL CRAFT ADVISORY THROUGH MIDNIGHT TUESDAY NIGHT.
THE PRESSURE GRADIENT WILL GRADUALLY RELAX BY MID-WEEK AS THE
INLAND THERMAL TROUGH WEAKENS. WINDS ARE EXPECTED TO BECOME LIGHT
BY LATE WEDNESDAY INTO THURSDAY WITH SOME SOUTHERLY FLOW POSSIBLE,
MAINLY N OF CAPE MENDOCINO LATE IN THE WORK WEEK. /SEC

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...
     SMALL CRAFT ADVISORY UNTIL MIDNIGHT TUESDAY NIGHT
      FOR PZZ450-455.
     GALE WARNING UNTIL 3 PM TUESDAY FOR PZZ470-475.