A cold front approaching the Pacific Northwest is expected to generate elevated fire weather conditions across portions of Oregon and Washington through mid-week, forecasters at the National Interagency Fire Center warn. Breezy west winds ahead of the front, combined with low relative humidity, will create a window of heightened fire weather risk — particularly in the Columbia Basin and along the eastern slopes of the Cascades.

Weather Pattern and Fire Risk

National Weather Service forecasters and NIFC predictive services are tracking a frontal system moving toward the Pacific Northwest that will produce breezy west winds from the Columbia Basin to the Sierra Front corridor. Ahead of the front's passage, minimum relative humidity values are expected to drop to 10-20% across exposed terrain — within the range that supports rapid fire spread if ignitions occur.

The combination of low humidity, gusty winds, and warm temperatures ahead of the front creates the classic fire weather setup that has historically driven large, fast-moving fires in eastern Washington and northern Oregon. The Columbia River Gorge acts as a natural wind channel during these events, accelerating westerly flow and potentially pushing fire behavior to extreme intensities on the downwind flanks of any active incidents.

Regional Impacts

Fire weather watches or elevated fire weather conditions may be issued for portions of the Columbia Basin, Okanogan Highlands, Blue Mountains, and the Oregon High Desert as the front approaches. Firefighters and agency dispatch centers across the region are monitoring the situation and pre-positioning resources ahead of the weather window.

Land managers with active or recently contained fires — including the Chestnut Fire area near Chelan — will be particularly vigilant, as gusty winds can re-activate smoldering fire during mop-up operations and potentially compromise containment lines that have not been fully mopped up.

Campfire and Recreation Restrictions

Central Oregon public lands have been under Stage 1 Public Use Fire Restrictions since May 18, prohibiting open fires including wood stoves and charcoal briquettes on Deschutes National Forest lands and surrounding public lands. Similar restrictions are in effect or anticipated across much of eastern Oregon and Washington as fire weather conditions develop.

Before heading into the backcountry this week, check current fire restrictions through:

  • USFS InciWeb: inciweb.wildfire.gov
  • Recreation.gov fire restrictions page
  • Your local National Forest or BLM district office
  • Oregon fire restriction map: oregon.gov/odf
  • Washington DNR fire restrictions: dnr.wa.gov

Longer-Range Outlook

The NIFC's June-through-September seasonal outlook indicates that the current below-normal precipitation trend across the Northwest is expected to persist with limited probability of a sustained wetting pattern. Drought conditions in the Columbia Basin and eastern Oregon high desert continue to prime fuels for fire weather events throughout the summer.

The National Weather Service offices in Pendleton, Spokane, Missoula, and Boise are the primary forecast offices for the Pacific Northwest inland and should be monitored for updated fire weather watches, warnings, and red flag conditions as the season progresses.