107
FXUS66 KMFR 050856
AFDMFR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEDFORD OR
156 AM PDT MON OCT 5 2026
KEY MESSAGES
* WARM TEMPERATURES AND DRY CONDITIONS ARE EXPECTED TO CONTINUE
THROUGH THURSDAY.
* WHILE ADVISORY CONDITIONS FOR HEAT AND FIRE WEATHER ARE NOT
EXPECTED, TAKING ADDITIONAL CARE ON EITHER SUBJECT IS ENCOURAGED
GIVEN THE ONGOING WARM AND DRY CONDITIONS.
* A COLD FRONT LOOKS TO BRING A QUICK COOLDOWN TOWARDS THE END OF
THE WEEK AND INTO THE WEEKEND, BUT SUBSTANTIAL PRECIPITATION IS
NOT CURRENTLY EXPECTED.
DISCUSSION
A STRONG, BROAD UPPER-LEVEL RIDGE CENTERED OVER THE
FOUR CORNERS REGION WILL REMAIN IN CONTROL OF THE FORECAST
THROUGH MUCH OF THE WEEK AHEAD. LITTLE CHANGE IS EXPECTED THROUGH
THURSDAY. COASTAL CITIES LOOK TO STAY IN THE MID 70S TO LOW 80S.
EAST SIDE AREAS AND THE UMPQUA VALLEY ARE FORECAST TO BE IN THE
MID TO HIGH 80S. MOST OTHER WEST SIDE VALLEYS WILL STAY IN THE LOW
TO MID 90S, WITH PARTS OF THE LOWER KLAMATH RIVER VALLEY REACHING
100 DEGREES. THESE TEMPERATURES, AROUND 10 TO 20 DEGREES ABOVE
NORMAL FOR THIS TIME OF YEAR, COULD RESULT IN SEVERAL TIED OR
BROKEN DAILY RECORD HIGHS.
WHILE THESE TEMPERATURES ARE CONCERNING IN THEIR MAGNITUDE, ADVISORY
PRODUCTS DO NOT LOOK TO BE NECESSARY. OF COURSE, INDIVIDUALS SHOULD
BE AWARE OF HOW THEY TOLERATE WARM WEATHER AND STAKE STEPS TO STAY
SAFE DURING PEAK HEATING. BUT WITH THE WARMEST TEMPERATURES LASTING
A FEW HOURS AT MOST AND AMPLE TIME FOR OVERNIGHT COOLING, SUSTAINED
HEAT STRESS IS NOT EXPECTED. BUT TO REPEAT, INDIVIDUALS WHO ARE VERY
SENSITIVE TO THESE DAYTIME TEMPERATURES CAN BE AFFECTED EVEN IF
THOSE TEMPERATURES DO NOT LAST LONG.
FIRE WEATHER IS ALSO WORTH MENTIONING. FORTUNATELY, THERE'S LITTLE
THREAT OF ELEVATED WINDS NECESSARY FOR RED FLAG CONDITIONS. WITH
THAT SAID, DRY CONDITIONS THROUGH THE DAY AND NIGHT ARE DOING LITTLE
TO EASE THE AMOUNT OF DRY GRASSES AND OTHER FUELS. EXTRA CARE WHILE
PERFORMING ACTIVITIES THAT CAN LEAD TO FIRE STARTS (CAMPFIRES,
CHAINS DRAGGING ALONG THE ROAD, YARD WORK TO NAME A FEW) IS
ENCOURAGED.
A PATTERN CHANGE LOOKS TO ARRIVE LATE IN THE WEEK AS THE RIDGE
BREAKS DOWN AND UPPER-LEVEL TROUGHING DIGS IN OVER THE WESTERN
UNITED STATES. THIS PATTERN WILL PUSH A COLD FRONT THROUGH THE
REGION FRIDAY, WITH MUCH COOLER TEMPERATURES EXPECTED THROUGH THE
WEEKEND. DAYTIME HIGHS ARE FORECAST TO DROP BY 5-10 DEGREES ON
FRIDAY, THEN ANOTHER 10-20 DEGREES ON SATURDAY. BROADLY SPEAKING,
THIS PUTS EAST SIDE AREAS IN THE LOW TO MID 60S WITH WEST SIDE
AREAS IN THE HIGH 60S TO LOW 70S. RAINFALL IS POSSIBLE BUT CHANCES
ARE TRENDING DOWN, AS THE TRAJECTORY OF THE FRONT PREVENTS IT
FROM TAPPING INTO SUFFICIENT MOISTURE FORM THE SOUTH. WHILE GUSTY
WESTERLY WINDS MAY DEVELOP OVER PARTS OF THE EAST SIDE, CURRENT
GUSTS LOOK SHORT OF ANY HAZARDOUS LEVELS AND INCREASING HUMIDITIES
WILL LIMIT FIRE WEATHER CONCERNS. COOLER TEMPERATURES LOOK TO
CONTINUE INTO AT LEAST SUNDAY, WITH SOME UNCERTAINTY BEYOND.
AVIATION...05/12Z TAFS
WIDESPREAD LIFR IN LOW CLOUDS AND FOG WILL
CONTINUE OVER THE COASTAL WATERS, ALONG THE COAST FROM CAPE BLANCO
NORTHWARD, AND LOCALLY FOR AREAS SOUTH OF CAPE BLANCO. AREAS ALONG
THE COAST AND INLAND MAY LIFT/BREAK BRIEFLY TO VFR THIS AFTERNOON
BEFORE RETURNING THIS EVENING. GUSTY NORTH BREEZES (~25 KT) DEVELOP
AT NORTH BEND IN THE AFTERNOON.
WHILE PATCHY LIFR COULD DEVELOP IN PORTIONS OF THE UMPQUA BASIN AND
AROUND ROSEBURG EARLY THIS MORNING, IT COULD ALSO EASILY REMAIN VFR
THROUGH THE PERIOD. THE REST OF THE AREA WILL HAVE VFR. MID-HIGH
LEVEL CLOUDS CONTINUE TO STREAM OVERHEAD FROM THE SOUTH THIS
MORNING, THOUGH THESE WILL TEND TO THIN OUT BY AFTERNOON. AN
ISOLATED SHOWER OR TWO CANNOT BE RULED OUT IN SE SECTIONS (DOWN
AROUND ALTURAS) THIS MORNING. -SPILDE
MARINE...UPDATED 130 AM PDT MONDAY, OCTOBER 5, 2026
A
PERSISTING THERMAL TROUGH WILL PRODUCE GUSTY NORTH WINDS AND STEEP
SEAS DURING MUCH OF THE WEEK AHEAD.
FLUCTUATIONS IN THE THERMAL TROUGH'S STRENGTH AND POSITION MAY BRING
CHANGES TO WHERE STEEP SEAS ARE THROUGH THE WEEK, BUT THERE IS AN
AGREEMENT IN GUIDANCE THAT SOME AMOUNT OF STEEP SEAS WILL BE PRESENT
THROUGH AT LEAST THURSDAY. A PATTERN CHANGE MAY BRING ACTIVE WEATHER
TOWARDS THE END OF THE WEEK, WITH SOME GUIDANCE ALSO SHOWING
INCOMING LONG PERIOD WESTERLY SWELL ARRIVING AT SOME POINT OVER THE
WEEKEND. CONFIDENCE IS NOT HIGH ENOUGH IN THESES OUTCOMES TO PREDICT
THE SEA STATE, BUT AS THIS IS THE FIRST SIGN OF POSSIBLY MEANINGFUL
LONG-PERIOD SWELL THIS SEASON, ACKNOWLEDGING IT IS WORTHWHILE.
MFR WATCHES/WARNINGS/ADVISORIES
OR...CA...NONE.
PACIFIC COASTAL WATERS...SMALL CRAFT ADVISORY UNTIL 11 PM PDT TUESDAY
FOR PZZ350-356-370-376.
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