839
FXUS66 KMFR 101726
AFDMFR

Area Forecast Discussion
National Weather Service Medford OR
926 AM PST Wed Dec 10 2025

...New Aviation Section...


.AVIATION (18Z TAFs)...

Morning low clouds/fog expected to produce IFR/LIFR conditions
for the terminals with the only exception at KRBG which is in VFR.
Expecting clearing later today with VFR conditions for all
terminals by this afternoon and continuing through early this
evening. Radiational cooling and clearing skies will likely lead
to IFR/LIFR conditions for low clouds/fog overnight for inland
terminals. However, KOTH is only expected reach MVFR overnight.

-Guerrero

&&

.PREV DISCUSSION... /Issued 318 AM PST Wed Dec 10 2025/

DISCUSSION...Totals for December 9th show that northwestern
Douglas County received around 1"-1.5" and areas near Crater Lake
saw about 0.25". Northern Coos County had a report of almost
0.50". Radar and observations show light rain at the coast. There
has been enough clearing from the heavier cloud cover that low
ceilings are found in west side valleys and low ceilings and
visibility for areas east near Klamath Falls.

Through Thursday morning parts of the coast, Douglas County and
the Cascades are forecast to receive less than a quarter of an
inch on average as the system is still bringing the main impacts
to Portland and Seattle.

The next step in the forecast is for the high pressure that`s off
the coast of California to build, and this will bring a slight warm
up to the area for the rest of the work week! Temperatures will on
average be 10-15 degrees warmer than normal west of the Cascades and
15-20 degrees above normal for east side, equating to mid-/upper 50s
and low 60s for both areas. We`re also expecting to see more sun,
especially into Thursday and Friday. Although the clearer skies
ahead will help us warm in the afternoons, it will make the mornings
colder. Friday and Saturday mornings are looking to be the coldest
in the forecast period with low/mid-40s near the coast and into the
Umpqua Basin. East side will have more mid-20s.

After the remaining showers at the coast, another chance of rain
comes Sunday morning with light showers. Our next front that looks
promising for more rainfall in Southern Oregon and Northern
California will arrive Monday. The EC is still favoring a faster
track, but overall Monday is the day that we can look for more
precipitation. Snow levels will start at 8,000`-8,500` Monday and
fall to 6,000`-7,000` Tuesday afternoon. This system is currently
forecast to bring heavier rain into Curry County, with west side
valleys seeing more rain than this past system as well. -9

AVIATION...10/12Z TAFs...Low ceilings and periodic rain showers are
keeping coastal areas, including North Bend, at IFR/LIFR levels
tonight. Other areas remain dry, but some areas (the Rogue and
Illinois valleys including Medford and Klamath Falls) are seeing IFR
to LIFR conditions.

Ceilings lift and skies look to clear for inland areas through the
day today, while ceilings will linger over coastal areas and into
Douglas County. These persisting ceilings look to hover near
VFR/MVFR thresholds. Clearer skies tonight bring a chance for
IFR/LIFR conditions tonight, and these details have been added to
the TAF. -TAD/-9

MARINE...Updated 200 AM PST Wednesday, December 10, 2025...Winds
subside tonight, but west swell persists north of Cape Blanco today
with small craft conditions through Thursday morning. Conditions
improve for the latter half of the week as high pressure builds over
the region. Expecting showers over the waters through mid-week as
well which could further reduce visibilities (fog/low clouds
expected as well) over the next couple days.

&&

.MFR WATCHES/WARNINGS/ADVISORIES...
OR...None.

CA...None.

PACIFIC COASTAL WATERS...Small Craft Advisory until 10 AM PST
     Thursday for PZZ350-370.

&&

$$