641
FXUS66 KMFR 240553
AFDMFR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEDFORD OR
1053 PM PDT MON MAR 23 2026
..UPDATED AVIATION DISCUSSION FOR 06Z TAFS
DISCUSSION
HIGH CLOUDS ARE STREAMING ACROSS THE AREA TODAY, THE
LEADING EDGE OF A WEAK FRONT THAT WILL ARRIVE LATE TOMORROW. THE
FRONT WILL BRING SLIGHT COOLING AND HIGHER HUMIDITY WITH LIGHT RAIN
ALONG AND WEST OF THE CASCADES IN SOUTHWEST OREGON AND INTO FAR
NORTHWEST SISKIYOU COUNTY, AND GUSTY SOUTHWEST WINDS FOR THE HIGHER
TERRAIN AND ALSO EAST OF THE CASCADES. A WIND ADVISORY HAS BEEN
ISSUED FOR FAR EASTERN KLAMATH COUNTY AND LAKE COUNTY FROM LATE
TUESDAY MORNING INTO TUESDAY EVENING, WITH SOUTHWEST WINDS OF 25 TO
35 MPH GUSTING UP TO 55 MPH. AS IS TYPICAL IN A SOUTHWEST FLOW
PATTERN, WINDS ARE EXPECTED TO BE STRONGEST NEAR WINTER RIM,
INCLUDING THE SUMMER LAKE TO SILVER LAKE VICINITY. WIND SPEEDS WILL
ALSO BE ELEVATED OVER THE WARNER MOUNTAINS OF EASTERN MODOC COUNTY.
REMNANTS OF THE FRONT WILL LINGER WEDNESDAY INTO THURSDAY WITH
COOLER TEMPERATURES THAT WILL BE CLOSER TO SEASONAL NORMALS, AND
ISOLATED TO NUMEROUS LIGHT SHOWERS...STILL LIMITED TO THE CASCADES
AND WEST SIDE IN OREGON AND FAR NORTHWEST SISKIYOU COUNTY.
WARMER AND DRIER AFTERNOON CONDITIONS RETURN LATE IN THE WEEK
THROUGH NEXT WEEKEND, WHILE CLEAR TO MOSTLY CLEAR SKIES UNDER A
BUILDING RIDGE ALLOW FOR A WIDER DIURNAL RANGE (COLDER MORNING
LOWS). BASED ON NBM MINIMUM TEMPERATURE PROBABILITIES, AND DEPENDING
ON YOUR SPECIFIC LOCATION, THERE IS A 40 TO 60 PERCENT CHANCE OF
FROST AND/OR FREEZING CONDITIONS FOR THE INLAND WEST SIDE VALLEYS
OF OREGON WEDNESDAY NIGHT AND THURSDAY NIGHT.COLDER AREAS, SUCH AS
THE EAST SIDE, THE SCOTT VALLEY, AND THE SHASTA VALLEY ARE STILL
WELL WITHIN THE COLD SEASON, AND ARE ALMOST CERTAIN TO FREEZE.
THE OUTLOOK IS FOR A MORE ACTIVE, BUT ALSO MORE COMPLEX PATTERN
OF ONSHORE FLOW NEXT WEEK (DAY 8 TO 14) TO END MARCH AND START
APRIL. UNCERTAINTIES INCLUDE THE EXTENT TO WHICH THE UPPER LEVEL
FLOW WILL SPLIT AND THE TIMING AND TRACK OF THE MOST VIGOROUS
PIECES OF ENERGY, WHICH IF THEY ARRIVE HERE, COULD BRING PERIODS
OF COOLER, WETTER WEATHER. -DW/BPN
AVIATION...24/06Z TAFS
AN APPROACHING COLD FRONT IS BRINGING
SHOWERS TO THE OREGON COAST AND INTO SOME WEST SIDE AREAS. BOTH
NORTH BEND AND ROSEBURG ARE OBSERVING RAINFALL TONIGHT. RAINFALL
WILL CONTINUE WEST OF AND ALONG THE CASCADES THROUGH TUESDAY, WITH
THE MOST ACTIVITY OVER COASTAL TERRAIN AND THE CASCADES. SNOW LEVELS
OF 8000 TO 9000 FEET THROUGH THE TAF PERIOD WILL KEEP SNOWFALL FROM
BEING A CONCERN.
THIS FRONT WILL ALSO BRING A PERIOD OF GUSTY WINDS, ESPECIALLY OVER
AREA TERRAIN. THE HIGHEST WIND SPEEDS ARE EXPECTED ALONG THE OREGON
COAST AS WELL AS OVER AND EAST OF THE CASCADES. GUIDANCE SUGGESTS
LOW LEVEL WIND SHEAR WILL BE POSSIBLE ALONG THE OREGON COAST AND
OVER TERRAIN THROUGH THE TAF PERIOD. ONLY THE NORTH BEND TERMINAL
LOOKS TO BE DIRECTLY AFFECTED BY THIS SHEAR. -TAD
MARINE...UPDATED 200 PM PDT MONDAY, MARCH 23, 2026
STEEP TO VERY
STEEP SEAS RETURN LATE TONIGHT INTO TUESDAY EVENING, WITH GALES
ACCOMPANYING A COLD FRONT AND DEVELOPING NORTH OF CAPE BLANCO. SWELL
DOMINATED SEAS FOLLOW LATE TUESDAY EVENING INTO WEDNESDAY AND MAY
REMAIN STEEP.
A THERMAL TROUGH IS LIKELY TO RETURN LATE WEDNESDAY THROUGH
SATURDAY. IT WILL RESULT IN STRONGER NORTHERLY WINDS THAT WILL BE
STRONGEST SOUTH OF CAPE BLANCO, WITH STEEP TO LOCALLY VERY STEEP
SEAS POSSIBLE. CONDITIONS ARE LIKELY TO IMPROVE EARLY NEXT WEEK
IMMEDIATELY AHEAD OF A SHIFT TO A MORE ACTIVE, MORE SEASONABLE
PATTERN.
MFR WATCHES/WARNINGS/ADVISORIES
OR...WIND ADVISORY FROM 11 AM TO 8 PM PDT TUESDAY FOR ORZ030-031.
CA...NONE.
PACIFIC COASTAL WATERS...SMALL CRAFT ADVISORY FROM 3 AM TO 8 PM PDT
TUESDAY FOR PZZ356-376.
GALE WARNING FROM 3 AM TO 8 PM PDT TUESDAY FOR PZZ350-370.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page