312
FXUS66 KMFR 241731 AAA
AFDMFR

Area Forecast Discussion
National Weather Service Medford OR
1030 AM PDT Fri May 24 2024

Updated Aviation Discussion

.DISCUSSION...Satellite imagery shows varying amounts of high and m
id level clouds ahead of an approaching weak upper trough. The upper
trough axis is over the west side valleys and will move east late
this morning. Meanwhile instability will increase east of the
Cascades and this in combination with ample mid level moisture and
weak trigger will be enough for isolated thunderstorms from around
Mount Shasta and points east to northeast of there and in portions
of Lake and northeast Klamath County this afternoon into early this
evening. Meanwhile intermittent showers are expected north of the
Umpqua Divide, Coos and northern Curry County, with precipitation
amounts less than a 0.10 of an inch. Changes were made to the
forecast to reflect the above mentioned. -Petrucelli


&&

.AVIATION...24/18Z TAFs... An approaching weak front will move
onshore late this afternoon and inland tonight. Northwesterly winds
will pick up ahead of the front this afternoon and continue into the
evening as the front gradually moves inland, but winds won`t be as
significant as the system that passed through earlier this week.

Light, spotty precipitation will move onshore and inland late this
afternoon into tonight. Best chances will be in northern portions of
the region (northern Douglas, Coos, Klamath, and Lake counties) as
well as along the south OR Cascade crest. Additionally, there is
about a 15-20% chance for isolated thunderstorms developing later in
the afternoon into the evening in southern and eastern Lake, eastern
Siskiyou and Modoc counties.

MVFR and local IFR conditions will develop along the coast in the
late afternoon and early evening, continuing overnight. Inland MVFR
conditions are expected in Douglas County this evening and tonight.
Mountain obscurations are also expected from the Southern Oregon
Cascades west this evening through early Saturday morning.
Conditions are expected to improve to VFR areawide by late Saturday
morning. -CC


&&

.MARINE...Updated 800 AM Friday, May 24, 2024...A front will
move through the waters this afternoon. Expect moderate north to
northwest winds and steep, short period seas to develop this evening
and last into Saturday. Gusty north winds (with gusts up to 25 kt)
and steep seas may linger into Saturday evening for areas south of
Cape Blanco.

Winds and seas are expected to lower Sunday into Monday but may
remain locally gusty for areas south of Cape Blanco. Another front
moves through next Tuesday but expect mainly light winds. This is
followed by a potential for increasing north winds and seas on
Wednesday and Thursday. -CC


&&

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

PACIFIC COASTAL WATERS...Small Craft Advisory from 5 PM this
     afternoon to 5 PM PDT Saturday for PZZ350-356-370-376.

&&

$$