Alturas, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

092
FXUS66 KMFR 131354
AFDMFR

Area Forecast Discussion
National Weather Service Medford OR
554 AM PST Tue Jan 13 2026

.DISCUSSION...The two main updates this morning were to fine tune
this morning`s coverage of fog/freezing fog in west side valleys,
and a slight change to extend the Air Stagnation Advisory
/PDXNPWMFR/ for southern Oregon valleys farther into Friday
morning to mirror the Air Quality Alert issued by the Oregon DEQ
/PDXAQAMFR/.

As was the case yesterday, a Freezing Fog Advisory is in effect
this morning for Josephine, Jackson, and western Siskiyou County
valleys.

In the big picture, the data still supports little change in our
current weather pattern through at least a week, early next
Tuesday. There is a high degree of uncertainty in when the
persistent ridge will stop being the dominant driver of our
weather. But, a majority of ensemble solutions indicate the ridge
will eventually flatten/weaken with a transition to northwest
flow aloft. Also, this change to wet weather later next week in
Day 8-10 has the highest probability that at least the first
front or two will be on the weaker side of what is typical for
this time of year.

In the meantime, Brookings will be one of the few places in our
area that clearly notices much day-to-day change in conditions,
with downslope warming from east winds (15 to 30 mph at Coast
Range ridges) anticipated for Wednesday and Thursday. Highs on
both days are likely to be in the mid to upper 60s, though
possibly as warm as the lower 70s. The changes will be more subtle
elsewhere with continued colder than normal mornings, and a very
gradual warming trend of afternoon high temperatures into the
weekend. The temperature forecast will depend heavily on the local
duration and coverage of mainly night and morning fog. As such,
though a warming trend is likely, the extent of the Thursday
through Monday warm- up of Rogue Valley high temperatures is still
in question.

&&

.AVIATION...13/12Z TAFs...Areas of fog and freezing fog with LIFR
have developed in valleys west of the Cascades, including in Coos,
Douglas, Josephine, Jackson, and western Siskiyou counties. Patchy
fog is also possible this morning in the Klamath Basin near Klamath
Falls and Shasta Valley near Montague.  These conditions will
persist this morning, then gradually lift and clear. Lower
conditions will likely linger longest in the Rogue and Illinois
valleys, with clearing possibly delayed until 21-22z this afternoon.

Outside of the valleys, VFR conditions are expected through the TAF
period. Coastal locations will remain VFR, except for fog from the
Coquille Basin which is expected to affect North Bend during the
morning.

The pattern of conditions is expected to repeat again, with valley
fog developing this evening and continuing into Wednesday morning.

&&

.MARINE...Updated 230 AM PST Tuesday, January 13, 2026...The
forecast was updated to issue a Small Craft Advisory from Wednesday
morning through Thursday night.

West swell dominated seas will diminish from this morning into this
evening. This improvement will be brief, with seas reaching a
minimum of 6 to 7 ft.

A thermal trough brings gusty north winds with steep seas from
Wednesday into Thursday night. North winds may briefly gust to gale
force, and seas will be very near to becoming very steep, with a
potential for an upgrade to a Hazardous Seas Warning (especially in
the outer waters). The strongest winds and highest seas are likely
during Wednesday afternoon and evening, with the combination of
north wind waves and west swell producing seas of 8 to 12 feet with
a dominant period of 16 seconds on Wednesday decreasing to 13
seconds on Thursday. Conditions are expected to improve Friday
through the weekend.

&&

.BEACH HAZARDS...Updated 230 AM PST Tuesday, January 13,
2026...Though the risk is lessened by combining with two other,
slightly shorter period west swell trains, a building long period
west swell will provide a slightly enhanced risk of sneaker waves
during Wednesday morning.

If you plan to visit area beaches, please be aware of the dangers
sneaker waves pose to beach goers. Sneaker waves can run up
significantly farther on beaches than normal, including over rocks
and jetties. These waves can suddenly knock people off of their feet
and sweep them into the ocean. The waves can also move logs or other
objects which could crush or trap anyone caught underneath. While
sneaker waves can occur at any time, the greatest risk is on an
incoming tide. Please be aware of the tides if venturing out onto
the beaches. NEVER turn your back on the ocean!

&&

.MFR WATCHES/WARNINGS/ADVISORIES...
OR...Freezing Fog Advisory until 11 AM PST this morning for ORZ024-
     026.

     Air Stagnation Advisory until 10 AM PST Friday for ORZ023-024-
     026-029>031.

CA...Freezing Fog Advisory until 11 AM PST this morning for CAZ080.

PACIFIC COASTAL WATERS...Small Craft Advisory from 8 AM Wednesday to
     2 AM PST Friday for PZZ350-356-370-376.

&&

$$