Area Forecast Discussion
Issued by NWS Eureka, CA

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000
FXUS66 KEKA 302322
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
422 PM PDT THU JUL 30 2015

.SYNOPSIS...TEMPERATURES WILL TREND CLOSER TO SEASONAL BY THIS
WEEKEND AS THE RIDGE SHIFTS EASTWARD AND AN UPPER LOW APPROACHES
FROM THE SOUTHWEST. THERE WILL BE A RISK OF AFTERNOON AND EVENING
THUNDERSTORMS ACROSS PORTIONS OF THE INTERIOR THROUGH MONDAY.

&&

.DISCUSSION...THE RIDGE THAT HAS BROUGHT THE ABOVE NORMAL
TEMPERATURES TO NORTHWEST CALIFORNIA WILL SHIFT EASTWARD TONIGHT.
AT THE SAME TIME AN UPPER LOW WILL BEGIN DEVELOPING TO OUR
SOUTHWEST. THIS COMBINATION WILL LEAD TO SEVERAL THINGS. FIRST,
TEMPERATURES WILL TREND DOWNWARD SEVERAL DEGREES ON FRIDAY, AND
THEN A FEW MORE ON SATURDAY. EXPECT SEASONAL TEMPERATURES THIS
WEEKEND FOLLOWED BY TEMPERATURES AT OR SLIGHTLY BELOW NORMAL EARLY
NEXT WEEK. SECOND, HIGHER HUMIDITIES. THIS WILL BE MOST NOTICEABLE
ALONG THE COAST DUE TO THE OVERNIGHT/MORNING STRATUS. THIRD,
THUNDERSTORM POTENTIAL. MONSOONAL MOISTURE BEING DRAWN IN FROM THE
SOUTH COMBINED WITH AFTERNOON HEATING AND INSTABILITY WILL BRING A
THREAT OF AFTERNOON AND EVENING THUNDERSTORMS FRIDAY THROUGH
MONDAY. THUNDERSTORMS LOOK LIKE THEY WILL BE ISOLATED AND NOT TOO
WET ON FRIDAY. HOWEVER, MODELS HAVE TRENDED MORE FAVORABLE WITH
CONVECTIVE PARAMETERS ON SATURDAY AND SUNDAY. THIS COMBINED WITH
SLIGHTLY HIGHER SHEAR COULD GENERATE ISOLATED STRONG STORMS OR
POSSIBLY SCATTERED WEAKER STORMS BOTH DAYS. THOUGH, PWATS
APPROACHING ONCE INCH SHOULD ALLOW THEM TO PRODUCE RAINFALL THAT
COULD BE LOCALLY HEAVY. CLOUD COVER AND A WEAK CAP COULD BE THE
ONLY THINGS HOLDING THESE STORMS BACK. REGARDLESS, TRENDED UPWARD
WITH THE POPS AND COVERAGE THE NEXT FEW DAYS. BEYOND THE WEEKEND,
THE COOLING TREND WILL CONTINUE AS A BROAD UPPER TROUGH SLOWLY
TRANSITS THROUGH THE REGION.

&&

.AVIATION...VFR TO MVFR CONDITIONS AND LIGHT TO MODERATE WINDS
WILL CONTINUE AT KCEC AND KACV THROUGH THIS EVENING. THE LOWER
CONDITIONS ARE DUE TO REDUCED CEILINGS AND/OR VISIBILITIES AT
TIMES. VFR TO MVFR CONDITIONS AND LIGHT WINDS TO CALM CONDITIONS
WILL OCCUR AT KCEC AND KACV EARLY THURSDAY MORNING WITH THE LOWER
CONDITIONS DUE TO HAZE OR PATCHY FOG REDUCING VISIBILITIES AND/OR
CEILINGS. VFR CONDITIONS AND LIGHT WINDS TO CALM CONDITIONS WILL
CONTINUE AT KUKI THROUGH THURSDAY.

&&

.MARINE...THE PRESSURE GRADIENT WILL CONTINUE TO GRADUALLY RELAX
ACROSS THE WATERS THE NEXT FEW DAYS. THEREFORE THE WINDS AND SEAS
WILL CONTINUE DIMINISHING. SHORT PERIOD SEAS WILL REMAIN LOW
THROUGH THIS WEEKEND. WINDS AND SEAS WILL INCREASE SLIGHTLY ACROSS
THE OUTER WATERS EARLY NEXT WEEK.

&&

.FIRE WEATHER...WITH ROUGHLY 150 CG STRIKES ACROSS ZONE 283 AS OF
THIS TYPING, ISSUED A RED FLAG WARNING FOR ISOLATED TO SCATTERED
DRY THUNDERSTORMS FOR THIS ZONE. THE REMAINING ZONES SHOULD SEE
ISOLATED THUNDERSTORMS. EXPECT THE THUNDERSTORMS TO DISSIPATE THIS
EVENING AS THE ATMOSPHERE STABILIZES. HOWEVER, THE THREAT FOR MORE
ROUNDS OF AFTERNOON AND EVENING THUNDERSTORMS PERSISTS EACH DAY
THROUGH MONDAY.

&&

.EKA WATCHES/WARNINGS/ADVISORIES...

CA...NONE

NORTHWEST CALIFORNIA COASTAL WATERS...NONE.

&&

$$

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