Fog

I translate this as meaning it will remain foggy on the coast through at least tomorrow morning. – Jack

Raw from the NWS:

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
920 AM PDT WED JUN 22 2011

.SYNOPSIS…DAYTIME TEMPERATURES WILL BE COOLER FOR THE REMAINDER
OF THE WEEK AS AN UPPER LEVEL TROUGH MOVES INTO THE PACIFIC
NORTHWEST AND A DEEPER MARINE LAYER DEVELOPS.

&&

.UPDATE…VIS SAT IMAGERY SHOWS FG/STRATUS ENTRENCHED ALONG THE
REDWOOD COAST AND COASTAL WATERS WITH CLR SKIES ELSEWHERE. ISSUED A
QUICK UPDATE TO REMOVE FG AND LOWER SKY OVER THE MENDOCINO COAST.
&&

.PREV DISCUSSION…ISSUED AT 415 AM PDT WED JUN 22 2011…AN UPPER
LEVEL TROUGH CURRENTLY IN THE SOUTHERN GULF OF ALASKA WILL SLOWLY
SWING THROUGH THE PACNW THROUGH THURSDAY. THE MAIN IMPACTS OF THIS
TROUGH WILL BE COOLER TEMPS ACROSS THE INTERIOR AND A DEEPENING OF
THE MARINE LAYER.

STRATUS CURRENTLY ALONG THE COAST AROUND 1000 FT THICK…AND
EXPECTED TO DEEPEN AS THE TROUGH APPROACHES AND ONSHORE FLOW
STRENGTHENS. PATCHY FG/DZ IS POSSIBLE UNDER THIS PATTERN LATE AT
NIGHT AND IN THE MORNING…WITH THE MARINE LAYER AT ITS DEEPEST
THU MORNING (AROUND 2000 FT) WITH TROUGH PASSAGE. STRATUS MAY
CREEP INTO WESTERN TRINITY COUNTY WITH SUCH A DEEP MARINE LAYER
WHICH WILL CERTAINLY INHIBIT MAX TEMPS. CU BUILDUPS ARE LIKELY
OVER THE INTERIOR THIS AFTERNOON AS THE TROUGH AXIS
APPROACHES…WITH THE BEST DYNAMICS AND MOISTURE FOR TSTM
DEVELOPMENT ALONG THE TRINITY ALPS AND POINTS TO THE N AND E.
AFTER COORDINATION WITH NEIGHBORING OFFICES AND SPC…HAVE DECIDED
TO INCLUDE ISO T MENTION FOR THIS AFTERNOON AND EVENING. GIVEN CURRENT
SATELLITE TRENDS AND MODEL SOUNDINGS…CONFIDENCE IS INCREASING
THAT A FEW TSTMS WILL IGNITE OVER THE HORN OF TRINITY COUNTY…BUT
THIS SCENARIO WILL NEED TO BE CLOSELY MONITORED AS THE DAY
PROGRESSES AND DAYTIME HEATING COMMENCES.

IN REGARDS TO TEMPS…HIGHS WILL BE 10-15 DEGREES COOLER TODAY
THAN ON TUESDAY…COOLING ANOTHER 5 OR MORE DEGREES ON THU.
HEIGHTS REBOUND SLIGHTLY ON FRIDAY…BUT TEMPS WILL BE SLOW TO
WARM AS A MEAN TROUGH LINGERS OVER THE W COAST. MODELS SHOW
ANOTHER SHORT WAVE TROUGH DROPPING S FROM THE GULF OF AK THIS
WEEKEND MAINTAINING A MEAN TROUGH OVER THE REGION CONTINUING THE
NEAR TO SLIGHTLY BELOW NORMAL TEMPS. AS WE HEAD INTO EARLY NEXT
WEEK…GLOBAL MODELS ARE HINTING AT A STRONGER TROUGH DROPPING
SOUTH ALONG THE WEST COAST. AMPLITUDE AND PLACEMENT OF THIS TROUGH
IS STILL VERY UNCERTAIN…BUT HAVE GONE AHEAD AND INTRODUCED A SLIGHT
CHANCE OF RAIN WITH THIS FEATURE BEGINNING LATE MON. JCA

.AVIATION…MARINE CLOUDS MAKING MORE OF A PRESENCE THIS MORNING
ALONG THE COAST. HI RES FORECAST MODELS SUGGEST A DEEPER MARINE
LAYER TODAY LASTING LONGER INTO THE AFTERNOON DUE TO AN APPROACHING
TROUGH. THUS PERIODS OF IFR DUE TO CIGS AND VIS COULD LAST THROUGH
THE MORNING BEFORE LIFTING TO MVFR CIGS THROUGH EARLY AFTERNOON.
SOME VFR BREAKS LIKELY BY LATE AFTERNOON. ELSEWHERE INLAND AREAS
WILL REMAIN VFR.

.MARINE…TIGHT PRESSURE GRADIENT REMAINS FOCUSED OVER THE COASTAL
WATERS AND NEAR COAST REGION…AND THIS WILL CONTINUE THROUGH THE
REMAINDER OF THE WORK WEEK. THE GRADIENT INTENSIFIES ON THU AS A
THERMAL LOW INTENSIFIES ACROSS THE INTERIOR OF THE STATE. THIS
WILL LIKELY LEAD TO GALE FORCE WINDS AND HIGHER GUSTS THURSDAY AND
FRIDAY…WITH A SLIGHT RELAXATION OF THE GRADIENT ON SAT.

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