750
FXUS66 KMFR 201138
AFDMFR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEDFORD OR
338 AM PST THU FEB 20 2025
UPDATED AVIATION DISCUSSION
AVIATION...20/12Z TAFS
A MIX OF CONDITIONS EXIST ACROSS THE AREA
THIS MORNING. FOR VALLEYS WEST OF THE CASCADES AND PORTIONS OF THE
KLAMATH BASIN, LIFR CONDITIONS IN FOG/LOW CLOUDS ARE PRESENT. ALONG
THE COAST AND AREAS EAST OF THE CASCADES, MVFR CONDITIONS ARE
PRESENT IN STRATUS. NOT MUCH CHANGE IS EXPECTED THROUGH THE MORNING
HOURS, WITH CONDITIONS EXPECTED TO IMPROVE TO VFR BY LATE MORNING
FOR MUCH OF THE AREA. THE LOWER CONDITIONS MAY LINGER INTO THE EARLY
AFTERNOON HOURS FOR THE KLAMATH BASIN. A STABILIZING AIR MASS IS
EXPECTED TO RESULT IN AREAS OF MAINLY WEST SIDE VALLEY LOW CLOUDS
AND FOG LATE THURSDAY EVENING INTO FRIDAY MORNING. /BR-Y
PREV DISCUSSION
/ISSUED 218 AM PST THU FEB 20 2025/
DISCUSSION...HIGH PRESSURE HAS RETURNED AND WILL REMAIN IN PLACE
INTO FRIDAY. THIS WILL RESULT IN SOME COLD MORNINGS, AREAS OF
OVERNIGHT/MORNING LOW CLOUDS OR FOG IN VALLEYS AND WARMER DAYTIME
TEMPERATURES. THIS RIDGE WILL PUSH THE PREFERRED STORM TRACK TO
THE NORTH, AND A FEW IMPULSES WILL PASS JUST TO OUR NORTH THROUGH
THE WEEKEND. THE FIRST OF THESE IS AN UPPER LOW THAT WILL APPROACH
BRITISH COLUMBIA COAST LATE FRIDAY, WITH THE TRAILING SOUTHERN
END OF A WEAKENING COLD FRONT JUST GLANCING THE FORECAST AREA
FRIDAY EVENING AND OVERNIGHT. THIS WILL BRING LIGHT RAIN AND
HIGHER MOUNTAIN SNOW TO THE AREA, MAINLY ALONG AND WEST OF THE
CASCADES. SNOW LEVELS WILL BE HIGH, AROUND 5500 TO 6500 FEET, SO
ONLY HIGHER PEAKS AND AREAS NEAR CRATER LAKE MAY SEE LIGHT SNOW
FRIDAY NIGHT. THIS WILL BE FOLLOWED BY ANOTHER COUPLE OF SIMILAR
FRONTS SATURDAY AND SUNDAY.
A DEEPER LOW PRESSURE SYSTEM WILL THEN MOVE INTO THE REGION ON
MONDAY OR MONDAY NIGHT, TAKING A MORE SOUTHERLY TRACK THAT COULD
BRING THE LOW DIRECTLY OVER SOUTHERN OREGON AND NORTHERN
CALIFORNIA. THIS WILL ALLOW FOR THE POTENTIAL FOR MODERATE
PRECIPITATION AND GUSTY WINDS. SNOW LEVELS ARE EXPECTED TO RISE ON
SATURDAY FROM NEAR 6000 FEET TO 7000-8000 FEET, THEN REMAIN HIGH
THROUGH SUNDAY, LOWERING TO 5000-6000 FEET LATE MONDAY. SO, MUCH
OF THE PRECIPITATION WITH THESE FRONTS ON THE WEEKEND AND INTO
MONDAY WILL FALL AS RAIN, WITH HEAVIEST RAIN ALONG THE COAST AND
COASTAL MOUNTAINS. MODELS AND ENSEMBLES INDICATE BREEZY TO GUSTY
WINDS AS THESE FRONTS MOVE THROUGH FOR THE MOUNTAINS AND BREEZY
WINDS FOR MANY AREAS EAST OF THE CASCADES.
MID NEXT WEEK, ENSEMBLES FAVOR A HIGH PRESSURE RIDGE RETURNING TO
THE REGION WITH A PERIOD OF DRY AND STABLE WEATHER. -BPN
MARINE...UPDATED 200 AM PST THURSDAY, FEBRUARY 20, 2025...IMPROVED
CONDITIONS ARE EXPECTED TODAY INTO FRIDAY MORNING WITH LIGHT TO
MODERATE NORTH WINDS AND SWELL DOMINATED SEAS. INCREASING
SOUTHERLY WINDS AND BUILDING SEAS ARE EXPECTED FRIDAY AHEAD OF A
RATHER WEAK COLD FRONT. STEEP SWELL DOMINATED SEAS ARE EXPECTED
ACROSS ALL AREAS FRIDAY INTO SATURDAY.
A STRONGER FRONT IS EXPECTED LATER SATURDAY WITH SOUTH GALES
POSSIBLE. THE PATTERN WILL REMAIN ACTIVE WITH ADDITIONAL EPISODES OF
SOUTH GALES POSSIBLE SUNDAY AND MONDAY, AND VERY HIGH AND VERY STEEP
SEAS POSSIBLE LATER MONDAY INTO TUESDAY. THE STRONGEST WINDS AND
HIGHEST SEAS ARE LIKELY TO OCCUR NORTH OF CAPE BLANCO. -DW/BR-Y
MFR WATCHES/WARNINGS/ADVISORIES
OR...CA...NONE.
PACIFIC COASTAL WATERS...SMALL CRAFT ADVISORY FROM 4 AM FRIDAY TO 10
AM PST SATURDAY FOR PZZ350-356-370-376.
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