Mount Shasta, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

933
FXUS66 KMFR 171723
AFDMFR

Area Forecast Discussion
National Weather Service Medford OR
1023 AM PDT Sun May 17 2026

.DISCUSSION...Updated aviation discussion.


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.AVIATION...17/18Z TAFs...VFR should prevail at the terminals for
the through early this evening with just some fair-weather clouds.
Local MVFR ceilings are present late this morning over the far East
Side where some light precip is accompanying an upper level trough.
This should end as the trough exits to the south and east this
afternoon and ceilings become VFR. Gusty northerly winds are
expected much of this afternoon/evening (peaking at 25-30kt). These
winds will subside around or just after sunset. Local MVFR/IFR
ceilings could impact the coast or portions of the Coquille/Umpqua
basins late tonight or first thing Monday morning, otherwise, VFR
prevails. -Spilde


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.PREV DISCUSSION... /Issued 643 AM PDT Sun May 17 2026/


MARINE...Updated 200 AM PDT Sunday, May 17, 2026...Steep seas
are continuing for areas south of Cape Blanco this morning due to a
mix of northwest swell and wind seas. North winds will strengthen
this afternoon and persist on  Monday. This will result in steep to
very steep seas across the waters, with the strongest winds and
highest seas south of Cape Blanco. Initially, today, steep to
very steep seas will be due to a mix of northwest swell and wind
seas, then seas will transition, becoming dominated by short
period wind seas tonight and Monday morning. Another northwest
swell arrives Monday afternoon and night, resulting in mixed seas
again.

Steep to very steep seas will persist through the week as north
winds strengthen and increase wind seas. Through this stretch, winds
and waves will peak each afternoon and evening with very steep seas
likely for areas south of Cape Blanco and generally steep seas north
of Cape Blanco. Ensemble models indicate winds will strengthen
Wednesday into Thursday with a potential (50-70% chance) for gales
across portions of the southern waters (especially from around Gold
Beach south).

PREV EXTENDED RANGE DISCUSSION... /Issued 245 PM PDT Sat May 16
2026/

The models become more progressive towards the tail end of the
weekend and there are some hints of some wetter weather on
Memorial Day. It looks like 30% of the ensemble members are
pushing a cold front through the region with some wetting rain. So
definitely hints of rain of a more progressive pattern for the
the last week of May.

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

PACIFIC COASTAL WATERS...Small Craft Advisory until 2 PM PDT this
     afternoon for PZZ356-376.

Hazardous Seas Warning from 2 PM this afternoon to 11 PM PDT
     Monday for PZZ356-376.

     Small Craft Advisory from 2 PM this afternoon to 11 PM PDT
     Monday for PZZ350-370.

&&

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