563 

FXUS66 KMFR 050528

AFDMFR



Area Forecast Discussion

National Weather Service Medford OR

1028 PM PDT Thu Jun 4 2026



.DISCUSSION...Updated Aviation and Marine sections...



&&



.AVIATION...05/06 TAFS...Clear skies are present across the area 

expect southern Coos County near Powers where stratus is developing. 

Overnight (10-12Z) MVFR conditions due to lower clouds are expected 

to develop, and areas in Lincoln City are already seeing this. This 

will occur mainly at the coast, but scattered MVFR ceilings are 

possible into the Umpqua Basin near Roseburg early in the morning. 

These clouds will decrease through the morning. Winds will be 

diurnally driven with speeds strengthening into the afternoon.





&&



.MARINE...Updated 745 PM PDT Thursday, June 4, 2026...Gusty winds 

and steep wind-driven seas are present in all but the most sheltered 

waters south of Cape Blanco. Conditions will improve briefly Friday, 

then north winds and steep seas return Saturday afternoon into 

Sunday morning. South winds will accompany a front on Monday, but 

otherwise conditions should be relatively calm early next week.





&&



.PREV DISCUSSION... /Issued 1227 PM PDT Thu Jun 4 2026/ 



DISCUSSION...After a substantial marine push this morning that

filled nearly all of the West Side valleys with low clouds and

fog, the skies have mostly cleared with plenty of sunshine now

over southern Oregon and far northern California. 



Today and tomorrow (Friday), with upper level flow in a near 

zonal to very low amplitude ridging pattern, daytime highs will 

be very near to just slightly above normal for early June, with 

the typical breezes in the afternoon. Cloud cover increases 

tomorrow afternoon as the next upper level trough, currently 

sitting just offshore of British Columbia, approaches the region. 

The trough will dig farther into the Pacific Northwest Saturday, 

and while the center of low itself passes over Washington, the 

trough axis will swing over our area late Friday into Saturday, 

bringing another round of afternoon gusty winds both days 

(remaining well below any thresholds), and a slight chance for 

light showers over northern Coos and Douglas counties, and maybe 

some drizzle along the rest of the coast, on Saturday. Areas in 

Modoc, Lake, and Klamath counties will be under frost/freeze 

concerns again Saturday night, with overnight lows potentially 

dropping below freezing in northern Klamath and Lake counties. 

Overall, temperatures Saturday will be 5 to 10 degrees below 

normal. 



Once the trough departs to the east, seasonal warmth returns 

under shortwave ridging Sunday, then another trough arrives late

Monday into Tuesday. The nature of this trough varies greatly

across the model suites in both timing and track, with some

passing the center of a closed low over Washington then into the

northern Rockies, and others digging farther south to bring the 

low over Central California and the Great Basin. Both will result

in somewhat cool temperatures, but will vary greatly in

precipitation chances and nature: the northerly track trending 

more towards light shower chances, while a southerly track leads 

to much higher shower chances along with potential thunderstorms. 



&&



.MFR WATCHES/WARNINGS/ADVISORIES...

OR...CA...None.



PACIFIC COASTAL WATERS...Small Craft Advisory until 8 AM PDT Friday 

     for PZZ356-376. 



&&



$$