226
FXUS66 KMFR 031140
AFDMFR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEDFORD OR
440 AM PDT WED JUN 3 2026
DISCUSSION
AN APPROACHING WEAK FRONT WILL HELP TO BRING MORE
SEASONAL TEMPERATURES ACROSS NORTHERN CALIFORNIA AND SOUTHERN OREGON
TODAY. COASTAL AREAS WILL SEE DAYTIME HIGHS IN THE LOW 60S. MOST
WEST SIDE VALLEYS WILL BE IN THE HIGH 70S TO LOW 80S, WHILE THE
UMPQUA VALLEY LOOKS TO STAY IN THE LOW 70S. AREAS EAST OF THE
CASCADES WILL GENERALLY BE IN THE LOW TO MID 70S.
OUTSIDE OF COOLING, THIS PASSING FRONT LOOKS TO HAVE MINIMAL IMPACT.
BREEZY WINDS ARE EXPECTED ACROSS MOST INLAND AREAS THIS AFTERNOON
AND EVENING, BUT EVEN THE HIGHEST SPEEDS ARE SAFELY SHORT OF
ADVISORY LEVELS. MORNING 10-20% PRECIPITATION CHANCES WILL BE LIMITED
TO COASTAL AREAS, WITH THOSE CHANCES DISSIPATING INTO THE AFTERNOON.
LOW AMOUNTS OF INSTABILITY WILL BE PRESENT OVER NORTHEASTERN LAKE
COUNTY THIS AFTERNOON, SUPPORTING 5% CHANCES FOR ISOLATED
THUNDERSTORMS. COLDER AIR BEHIND THE FRONT WILL BRING CHANCES FOR
OVERNIGHT LOWS EAST OF THE CASCADES TO REACH FROST TEMPERATURES.
ZONAL FLOW BEHIND THE FRONT WILL KEEP SEASONAL TEMPERATURES IN THE
FORECAST THROUGH THE END OF THE WEEK. LONG-TERM GUIDANCE IS SHOWING
MORE AGREEMENT FOR THE UPPER PATTERN THROUGH THE WEEKEND. CURRENT
IMAGERY SHOWS THAT THE TROUGH WILL NOT SPLIT, WITH THE LOW PASSING
TO THE NORTH OF THE AREA. PRECIPITATION CHANCES ARE MINIMAL, WITH
SLIGHT CHANCES FOR LIGHT SHOWERS OVER COOS AND DOUGLAS COUNTIES ON
SATURDAY. GUSTY WINDS ARE POSSIBLE OVER HIGHER TERRAIN ACROSS THE
AREA, BUT FORECAST SPEEDS REMAIN BELOW HAZARDOUS LEVELS. AREAS IN
NORTHERN LAKE AND KLAMATH COUNTIES MAY SEE OVERNIGHT LOWS REACH
FREEZING LEVELS ON SATURDAY NIGHT INTO SUNDAY MORNING.
BEHIND THE TROUGH, SEASONAL WARMTH RETURNS SUNDAY BEFORE MODEL
IMAGERY DIVERGES EARLY NEXT WEEK. METEOGRAMS FOR BOTH ECMWF AND GFS
ARE LEANING TOWARDS THE PRESENCE OF BENEFICIAL PRECIPITATION ON
MONDAY AND/OR TUESDAY, BUT THE DETAILS (TIMING AND QUANTITY) ARE
COARSE. -TAD
AVIATION...03/12Z TAFS
MARINE STRATUS REMAINS IN PLACE ALONG THE
COAST, KEEPING FLIGHT LEVELS AT IFR/LIFR LEVELS EARLY THIS MORNING.
AN APPROACHING WEAK FRONT WILL ALSO BRING SOME LIGHT SHOWERS TO
PARTS OF THE COAST THIS MORNING, POSSIBLY BRINGING LOCALLY LOWER
CEILINGS AND VISIBILITIES. RAIN SHOWERS DISSIPATE INTO THE
AFTERNOON, BUT LINGERING CLOUD COVER LOOKS TO KEEP MVFR LEVELS IN
PLACE ALONG THE COAST.
INLAND AREAS WILL SEE VFR LEVELS UNDER HIGH CEILINGS. THE PASSING
FRONT WILL BRING A PERIOD OF GUSTY WINDS TO EAST SIDE AREAS. THESE
GUSTS EASE TONIGHT INTO EARLY THURSDAY MORNING. -TAD
MARINE...UPDATED 200 AM PDT WEDNESDAY, JUNE 3, 2026
A WEAK FRONT
IS BRINGING LIGHT SHOWERS OVER THE WATERS THIS MORNING, BUT WITH NO
SIGNIFICANT IMPACTS EXPECTED. WITH NORMAL WINDS AND SWELL, SEAS WILL
STAY BELOW ADVISORY LEVELS TODAY.
BEHIND THE FRONT, NORTHERLY WINDS INCREASE ACROSS AREA WATERS AND
ARE EXPECTED TO BUILD STEEP SEAS SOUTH ON GOLD BEACH FROM THURSDAY
MORNING INTO FRIDAY MORNING. THESE WINDS EASE AS ANOTHER SYSTEM
PASSES TO THE NORTH ON SATURDAY BUT MAY RETURN ON SUNDAY. -TAD
MFR WATCHES/WARNINGS/ADVISORIES
OR...FROST ADVISORY FROM 3 AM TO 8 AM PDT THURSDAY FOR ORZ029>031.
CA...FROST ADVISORY FROM 3 AM TO 8 AM PDT THURSDAY FOR CAZ083>085.
PACIFIC COASTAL WATERS...SMALL CRAFT ADVISORY FROM 5 AM THURSDAY TO 5
AM PDT FRIDAY FOR PZZ356-376.
TAD/TAD/TAD
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