541
FXUS66 KMFR 032008 CCA
AFDMFR

Area Forecast Discussion...CORRECTED
National Weather Service Medford OR
108 PM PDT Wed Jun 3 2026

.DISCUSSION...After a warm start to the week, a passing front
today will bring more seasonal temperatures to far northern
California and southern Oregon. A few showers are accompanying
this front today, but very little of the precipitation is reaching
the ground, and what has reached the ground has done little more
than speckle the pavement. Some gusty winds are also moving into
the area as the front passes, but even the highest speeds are
safely short of Advisory levels. Low amounts of instability will
be present over northeastern Lake County this afternoon,
supporting around a 5-10% chances for isolated thunderstorms.

Colder air will settle into the area tonight behind the front,
with overnight lows dropping to around 5 degrees below normal.
east of the Cascades, frost is expected, and with the growing
season beginning there, a Frost Advisory has been issued. See
PDXNPWMFR for more details.

The upper level pattern switches more towards zonal flow behind
the front will keep seasonal temperatures in the forecast through
the rest of the week, until the next trough arrives this weekend.
While the center of low passes to the north of the area, the
trough axis will gradually pass over the area Friday into
Saturday, bringing another round of afternoon gusty winds, and a
slight chance for light showers over Coos and Douglas counties on
Saturday. Areas in Modoc, Lake, and Klamath counties will be
under frost/freeze concerns again Saturday night, with overnight
lows potentially dropping below freezing in northern Klamath and
Lake counties.

Behind the trough, seasonal warmth returns under shortwave ridging
early next week, with the potential for another upper level
trough and cold front arriving with light precipitation chances
by midweek.


&&

.AVIATION...03/18Z TAFs...VFR is present inland, while areas of
IFR/MVFR remain in place along the coast. A weak front moves inland
this afternoon. This may produce some light showers in Coos and
Douglas counties, including North Bend and Roseburg, but mainly
virga. The passing front will bring gusty west to northwest winds to
areas east of the Cascades this afternoon and evening. Rain showers
and clouds dissipate inland from late afternoon into the early
evening, but lingering cloud cover looks to keep MVFR and local IFR
in place along the coast.

A reinforcing push of marine stratus overnight is expected from Cape
Blanco northward, and into the Umpqua Valley (including Roseburg)
will continue the mix of IFR/MVFR until around 17Z on Thursday
morning.

&&

.MARINE...Updated 1230 PM PDT Wednesday, June 3, 2026...A weak front
is bringing light showers over the waters, but with no significant
impacts expected. Relatively calm wind and sea conditions are
expected into this evening.

Behind the front, northerly winds increase across area waters and
are expected to build steep seas south of Cape Blanco tonight
into Friday morning. These winds ease as another system passes to
the north on Saturday. But, increasing north winds and steep wind
driven seas are forecast to return late Saturday into Sunday, and
again early Monday into Tuesday.


&&

.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 8 PM this evening
     to 8 AM PDT Friday for PZZ356-376.

&&

$$