FXUS66 KMFR 121726

AFDMFR



Area Forecast Discussion

National Weather Service Medford OR

926 AM PST Fri Dec 12 2025



.Updated Aviation Discussion. 



.DISCUSSION...Satellite image shows low clouds in the same areas

as yesterday with areas of fog in the Klamath, Scott, Shasta and

portions of the Klamath Basin, including Klamath Falls. The low

clouds in the Rogue, Illinois, Applegate, Klamath River, and Scott

Valleys could linger into the afternoon and may not break out at 

all. This will result in lower afternoon temperatures and they 

have been adjusted lower for this afternoon. Also added low clouds

to areas to better match up with what the satellite image is 

showing and added freezing fog in portions of the Klamath Basin 

and Shasta Valley. 



Other than the low clouds and fog noted above, skies are clear and

it will remain dry through the day with mild afternoon

temperatures where there is no fog and/or low clouds. 



Dry weather is likely to continue through the weekend. A weak

shortwave and surface front will approach the coast Sunday 

afternoon, but the front and shortwave will be running into 

stronger upper ridging, this will weaken the front and the front

will eventually dissipate as it moves inland late Sunday

afternoon. 



A change in the pattern is in the works for the start of next week

with a series of front moving through the area starting next

Monday and lasting for most of next week. -Petrucelli







&&



.AVIATION...12/18z TAFs...Very little change in the pattern is 

likely in the next 24 hours. Areas of low stratus and fog are 

present in valleys west of the Cascades, including IFR in the Rogue 

Valley at Medford and Grants Pass and LIFR in fog in the Shasta 

Valley, and the Umpqua Basin, including Roseburg and Coquille 

valleys. These conditions will persist through 20z. Some areas, such 

as Medford and Grants Pass will see ceilings lift higher late in the 

afternoon to MVFR, but likely will not break out.



Along the coast and just offshore. VFR conditions are likely through 

early this evening with lower flight conditions are likely to return 

tonight. 



East of the Cascades, Freezing fog is confined to portions of 

Klamath Basin, including Klamath Falls, but satellite and web cams 

suggest the freezing fog and vertical visibility are shallow and it 

could clear out within the next hour or two, with VFR conditions the 

rest of the day. Guidance suggest freezing fog and low vertical 

visibility could develop again late this evening and last for the 

rest of the TAF period. -Petrucelli





&&



.MARINE...Updated 820 AM PST Friday, December 12, 2025...Light to

moderate north winds and moderate west swell will persist through

Friday night. Gradually, winds shift to southerly Saturday and 

increase into Sunday, but still probably remain below small craft 

advisory levels. 



Low pressure then deepens over the north Pacific and a cold front 

will swing through the waters Sunday night into Monday. This will 

bring a high probability of gales (>70%) and a period of steep to 

very steep hazardous seas. A series of frontal systems is likely to 

keep the weather active with elevated winds and seas much of next 

week. -Spilde/BPN





&&



.MFR WATCHES/WARNINGS/ADVISORIES...

OR...None.



CA...Dense Fog Advisory until 9 AM PST this morning for CAZ081. 



PACIFIC COASTAL WATERS...None.



&&



$$