411
FXUS66 KMFR 121726
AFDMFR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEDFORD OR
926 AM PST FRI DEC 12 2025
.UPDATED AVIATION DISCUSSION.
DISCUSSION
SATELLITE IMAGE SHOWS LOW CLOUDS IN THE SAME AREAS
AS YESTERDAY WITH AREAS OF FOG IN THE KLAMATH, SCOTT, SHASTA AND
PORTIONS OF THE KLAMATH BASIN, INCLUDING KLAMATH FALLS. THE LOW
CLOUDS IN THE ROGUE, ILLINOIS, APPLEGATE, KLAMATH RIVER, AND SCOTT
VALLEYS COULD LINGER INTO THE AFTERNOON AND MAY NOT BREAK OUT AT
ALL. THIS WILL RESULT IN LOWER AFTERNOON TEMPERATURES AND THEY
HAVE BEEN ADJUSTED LOWER FOR THIS AFTERNOON. ALSO ADDED LOW CLOUDS
TO AREAS TO BETTER MATCH UP WITH WHAT THE SATELLITE IMAGE IS
SHOWING AND ADDED FREEZING FOG IN PORTIONS OF THE KLAMATH BASIN
AND SHASTA VALLEY.
OTHER THAN THE LOW CLOUDS AND FOG NOTED ABOVE, SKIES ARE CLEAR AND
IT WILL REMAIN DRY THROUGH THE DAY WITH MILD AFTERNOON
TEMPERATURES WHERE THERE IS NO FOG AND/OR LOW CLOUDS.
DRY WEATHER IS LIKELY TO CONTINUE THROUGH THE WEEKEND. A WEAK
SHORTWAVE AND SURFACE FRONT WILL APPROACH THE COAST SUNDAY
AFTERNOON, BUT THE FRONT AND SHORTWAVE WILL BE RUNNING INTO
STRONGER UPPER RIDGING, THIS WILL WEAKEN THE FRONT AND THE FRONT
WILL EVENTUALLY DISSIPATE AS IT MOVES INLAND LATE SUNDAY
AFTERNOON.
A CHANGE IN THE PATTERN IS IN THE WORKS FOR THE START OF NEXT WEEK
WITH A SERIES OF FRONT MOVING THROUGH THE AREA STARTING NEXT
MONDAY AND LASTING FOR MOST OF NEXT WEEK. -PETRUCELLI
AVIATION...12/18Z TAFS
VERY LITTLE CHANGE IN THE PATTERN IS
LIKELY IN THE NEXT 24 HOURS. AREAS OF LOW STRATUS AND FOG ARE
PRESENT IN VALLEYS WEST OF THE CASCADES, INCLUDING IFR IN THE ROGUE
VALLEY AT MEDFORD AND GRANTS PASS AND LIFR IN FOG IN THE SHASTA
VALLEY, AND THE UMPQUA BASIN, INCLUDING ROSEBURG AND COQUILLE
VALLEYS. THESE CONDITIONS WILL PERSIST THROUGH 20Z. SOME AREAS, SUCH
AS MEDFORD AND GRANTS PASS WILL SEE CEILINGS LIFT HIGHER LATE IN THE
AFTERNOON TO MVFR, BUT LIKELY WILL NOT BREAK OUT.
ALONG THE COAST AND JUST OFFSHORE. VFR CONDITIONS ARE LIKELY THROUGH
EARLY THIS EVENING WITH LOWER FLIGHT CONDITIONS ARE LIKELY TO RETURN
TONIGHT.
EAST OF THE CASCADES, FREEZING FOG IS CONFINED TO PORTIONS OF
KLAMATH BASIN, INCLUDING KLAMATH FALLS, BUT SATELLITE AND WEB CAMS
SUGGEST THE FREEZING FOG AND VERTICAL VISIBILITY ARE SHALLOW AND IT
COULD CLEAR OUT WITHIN THE NEXT HOUR OR TWO, WITH VFR CONDITIONS THE
REST OF THE DAY. GUIDANCE SUGGEST FREEZING FOG AND LOW VERTICAL
VISIBILITY COULD DEVELOP AGAIN LATE THIS EVENING AND LAST FOR THE
REST OF THE TAF PERIOD. -PETRUCELLI
MARINE...UPDATED 820 AM PST FRIDAY, DECEMBER 12, 2025
LIGHT TO
MODERATE NORTH WINDS AND MODERATE WEST SWELL WILL PERSIST THROUGH
FRIDAY NIGHT. GRADUALLY, WINDS SHIFT TO SOUTHERLY SATURDAY AND
INCREASE INTO SUNDAY, BUT STILL PROBABLY REMAIN BELOW SMALL CRAFT
ADVISORY LEVELS.
LOW PRESSURE THEN DEEPENS OVER THE NORTH PACIFIC AND A COLD FRONT
WILL SWING THROUGH THE WATERS SUNDAY NIGHT INTO MONDAY. THIS WILL
BRING A HIGH PROBABILITY OF GALES (>70%) AND A PERIOD OF STEEP TO
VERY STEEP HAZARDOUS SEAS. A SERIES OF FRONTAL SYSTEMS IS LIKELY TO
KEEP THE WEATHER ACTIVE WITH ELEVATED WINDS AND SEAS MUCH OF NEXT
WEEK. -SPILDE/BPN
MFR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
CA...DENSE FOG ADVISORY UNTIL 9 AM PST THIS MORNING FOR CAZ081.
PACIFIC COASTAL WATERS...NONE.
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