The National Weather Service in Medford has issued Freeze Warnings for Monday morning across southern Oregon and northern California, with temperatures as low as 27 in Siskiyou County and 30 in the Rogue Valley.
A Frost Advisory was also issued for the Roseburg area, and frost is expected Sunday morning in Portland-area valleys.
Southern Oregon: Freeze Warning Monday
Eastern Curry County, Josephine County and Jackson County are under a Freeze Warning from 2 to 9 AM PDT Monday.
Lows could reach 30 degrees in the Rogue, Illinois and Applegate valleys.
Cave Junction and Provolt could be several degrees colder than the larger valleys.
Sunday morning, a Frost Advisory remains in effect from 2 to 8 AM PDT, with lows near 33.
Affected areas include Medford, Ashland, Grants Pass, Jacksonville, Gold Hill, Rogue River, Shady Cove, Butte Falls, Merlin, Applegate, Wilderville and Cave Junction.
NWS Medford flagged the cold weekend in an earlier post, before the warnings were issued.
Douglas County: Frost Advisory Monday
A new Frost Advisory covers the Umpqua Valley of Central Douglas County from 2 to 9 AM PDT Monday.
Lows could fall to 34 degrees.
The area includes Roseburg, Sutherlin, Winchester, Myrtle Creek, Canyonville, Glendale, Drain, Elkton, Green and Umpqua.
Sensitive outdoor plants may be killed if left uncovered.
Portland Area: Frost Advisory Sunday
NWS Portland has a Frost Advisory from midnight tonight to 9 AM PDT Sunday, with lows of 33 to 36.
It covers the North Oregon Coast Range, Outer Southeast Portland Metro, Linn County Lowlands, Upper Hood River Valley, and the Cascade Foothills of Clackamas, Marion, Linn and Lane counties.
In Washington, it includes North Clark County Lowlands and the South Washington Cascade Foothills.
Sub-freezing lows are likely (70 to 90% chance) in Parkdale and Dee. Most of the Upper Hood River Valley, including Odell, should stay above freezing.
Siskiyou County, California: Two Freeze Warnings
Western, Central and South Central Siskiyou County face two nights of sub-freezing temperatures.
Sunday: Freeze Warning from 2 to 8 AM PDT, with lows as low as 28.
Monday: a new Freeze Warning from 2 to 9 AM PDT, with lows as low as 27.
The warnings cover the Shasta Valley, Scott Valley and parts of the lower Klamath River Valley, including Mount Shasta City and areas to the east.
Communities include Weed, Yreka, Mount Shasta, McCloud, Fort Jones, Etna, Happy Camp, Callahan, Scott Bar, Klamath River, Hilt and Greenview.
Safety Reminders
Take steps now to protect tender plants.
Cover sensitive plants with lightweight cotton fabric, such as bedsheets or thin blankets, to retain heat.
Move potted plants indoors if they are sensitive to cold.
Protect exposed outdoor pipes and bring pets indoors.
For live updates, follow NWS Medford on X.
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