Weather & Fuels

A strong atmospheric trough is driving a significant pattern change across the Pacific Northwest, delivering cooler temperatures, increased humidity, and light precipitation that are expected to accelerate containment of remaining active fires.

A major cold front is bringing cooler weather and moisture to the Pacific Northwest this weekend, signaling the effective end of the region's fire season — but forecasters warn pre-frontal winds up to 50 mph could create one last dangerous window.

A major cold front is bringing rain and mountain snow to Pacific Northwest fire lines this weekend, expected to significantly moderate fire activity across Washington and Oregon. Winds gusting to 50 mph ahead of the front are creating a brief critical fire weather window in Montana and Wyoming before cooler, wetter conditions arrive.

Temperatures running 5–15°F above normal and below-average humidity keep fire danger elevated across parts of the PNW this October, even as the worst of the 2026 fire season appears to be winding down. Here's what forecasters are watching.

Fire weather advisories are in effect for southeastern Oregon and southwest Idaho Thursday, with relative humidity dropping to 10-20% and gusty winds, even as ERC values across the Northwest continue their seasonal decline.

Temperatures running 10-20°F above normal across the Northwest, combined with low relative humidity and gusty winds, are maintaining elevated fire weather conditions into early October — despite the season trending toward closure.

NICC’s October 2026–2027 fire potential outlook shows declining fire risk for the Pacific Northwest as ERC values drop and fall rains arrive. Elevated fire potential is expected to persist in the Southern U.S. through winter, with Puerto Rico also flagged as high-risk.

Washington State’s statewide burn ban expired in late September, and major jurisdictions including Seattle, King County, Whatcom County, and Clallam County lifted local restrictions on October 1. Residents are reminded to check local rules before burning.

The NICC October fire weather outlook signals improving conditions across Oregon and Washington, but ongoing extreme heat and low humidity in California and Nevada keep national fire danger elevated.

NIFC fire weather forecasters flag a short-term warm spell for early October, but the overall Pacific Northwest outlook continues to improve as the 2026 season winds toward its close.

A new warming and drying trend is building across the western United States, with temperatures forecast to run 5 to 15 degrees above normal and below-normal precipitation likely for Washington, Oregon, Idaho, and neighboring states through mid-October. Nationally, more than 9 million acres have burned in 2026.

A high-pressure ridge is forecast to build warmth and dryness back into the Pacific Northwest during mid-October, raising concerns about flare-ups in large smoldering fires and potential new ignitions in eastern Washington and Oregon.

A shift toward fall weather patterns is bringing rain to western Oregon and Washington and higher humidity to the east side, offering much-needed relief to firefighters — though late-season wind events remain a threat.

Rainfall is returning to western Oregon and Washington, but forecasters warn that the Great Basin and portions of eastern Oregon remain dry and susceptible to fire spread — and Pacific Northwest communities should stay alert through at least mid-October.

Dry conditions persist across eastern Oregon, Washington, and Idaho into late September despite some early fall precipitation. The NIFC monthly outlook flags continued elevated fire potential through mid-October. Fuel moisture levels remain below normal across much of the region.

As autumn moisture brings relief to the Pacific Northwest, fire weather forecasters are watching dry, windy conditions developing in the Great Plains, Southern Rockies, and Northern Great Basin this week.

Washington's statewide burn ban expires September 30, but fire officials are warning residents not to mistake the lifting of restrictions for the end of fire danger. Officials say no season-ending precipitation has arrived, fuels remain dry in Central Washington, and human-caused fire starts remain a significant concern.

A Pacific weather system is delivering beneficial rainfall to the Cascades, northern Idaho, and western Montana, moderating fire behavior on mountain fires — while the Columbia Basin remains comparatively dry, and a new fire near Benton City is burning in that drier eastern zone.

The National Weather Service in Medford issued Red Flag Warnings for southern Oregon fire weather zones September 23-24, citing southwest winds gusting to 35 mph and critically low relative humidity, even as the national fire season shows signs of winding down.

Breezy Cascade gap winds with gusts up to 35 mph are expected through the Columbia Gorge and other terrain corridors this week, raising late-season fire weather concerns across the Pacific Northwest. Recent Red Flag Warnings in Idaho and Oregon underscore the ongoing risk despite some improvement in conditions.