textproduct: Medford

DISCUSSION

Breezy winds have generally eased early this morning as a weak front continues eastward. Merlin had the highest observed rainfall amount through Wednesday, with 0.04 inches measured.

For today and Friday, zonal flow aloft with some hints of slight ridging will keep daytime highs within 5 degrees of seasonal norms across the area. Cloud cover increases on Friday afternoon as a low pressure system approaches Washington state. This passing low looks to be generally uneventful. Daytime temperatures cool on Saturday before returning to near seasonal averages on Sunday. Northern Lake and Klamath counties may see lows reach freezing levels early Saturday morning and early Sunday morning. Breezy winds are expected Friday afternoon through Saturday afternoon. Gusty northerly winds may develop on Saturday evening and night as energy swirling around the low nudges the trough closer to the area, tightening pressure gradients. These winds will be highest in the Shasta Valley and over east side terrain but look safely short of Advisory level speeds. Precipitation with this system is a non-issue, as only northernmost Coos and Douglas counties have 10% chances to see any rainfall.

The trough moves to the east Sunday morning, only to be followed by another low pressure system approaching later in the day. This second low is expected to move over the area, bringing cooler temperatures across the area. The Oregon coast and Cascades will see showers through Monday and Tuesday, with slight chances for rainfall over west side valleys. Currently, areas east of the Cascades are expected to stay dry. Thunderstorm activity is difficult to forecast this far out, but GFS deterministic imagery is showing some CAPE bring present west of the Cascades on Monday afternoon and Tuesday afternoon.

Behind the second low, lomg-term imagery shows an upper ridge developing over the Pacific Ocean and possibly extending over the area. There's some disagreement in placement and depth, but next week could end with warm and dry conditions. -TAD

AVIATION...04/12Z TAFs

Areas of IFR to LIFR ceilings remain in some areas of the Oregon coast, but local terminals and inland areas are starting the day at VFR levels. These levels will be present much of the day, with only some gusty winds along the coast in the afternoon to note.

A low pressure system passing to the north will bring some cloud cover to the coast and into the Umpqua Valley towards the end of the TAF period. MVFR ceilings are possible, with higher chances for coastal areas. Inland areas will remain at VFR levels through the TAF period. -TAD

MARINE...Updated 200 AM PDT Thursday, June 4, 2026

Northerly winds and steep seas are building steep seas south of Cape Blanco into early Friday morning. Conditions ease before Friday afternoon, but increased north winds and steep wind driven seas are forecast to return late Saturday into Sunday, and again early Monday into Tuesday.

MFR WATCHES/WARNINGS/ADVISORIES

OR...Frost Advisory until 8 AM PDT this morning for ORZ029>031.

CA...Frost Advisory until 8 AM PDT this morning for CAZ083>085.

PACIFIC COASTAL WATERS...Small Craft Advisory until 8 AM PDT Friday for PZZ356-376.