A cold upper-level weather system that stalled over California in late May before tracking eastward across the Columbia and Great Basins is bringing a brief period of below-normal temperatures and scattered showers to much of Oregon and western Washington — offering a short-lived reprieve from fire weather concerns even as the long-range outlook points to a hot, dry summer ahead.

Current Conditions

As of early June, weather patterns across the Pacific Northwest remain cooler and wetter than seasonal norms, with below-normal temperatures forecast for much of Oregon and western Washington through the near term. Gusty westerly winds are expected across the Cascades and into the Columbia Basin as the system pushes through, and showers are expected to provide some temporary relief to drying fuels in the Cascades and Coast Range.

Eastern Oregon, eastern Washington, and southern Idaho — the areas of greatest fire weather concern — are also seeing some moderation in temperatures, though fuel conditions in many parts of the interior remain drier than average for this time of year following a low-snowpack winter and dry spring.

Thunderstorm Risk in Idaho and Montana

The passage of the weather system is bringing elevated thunderstorm potential to the mountains of Idaho and much of Montana, as well as into the Northern Rockies more broadly. These storms are expected to be a mix of wet and dry, meaning some may produce lightning without significant rain reaching the ground — the classic ignition scenario that kicks off many remote wilderness fires in the region.

Fire weather forecasters at the National Weather Service are monitoring the situation closely. Dry lightning in fire-prone terrain can create multiple simultaneous ignitions that are difficult to staff with initial-attack resources, particularly later in the season when overall fire activity is elevated.

What the Long-Range Outlook Says

Despite the current cool spell, longer-range climate forecasts paint a challenging picture for the summer months. The NIFC seasonal outlook projects:

  • Above-average significant wildfire potential across eastern Oregon, eastern Washington, and Idaho beginning as early as July
  • Elevated risk expanding to cover all of Washington, Oregon, and Idaho by August
  • Below-normal precipitation expected through September across most of the Northwest
  • Above-normal temperatures anticipated for the interior Pacific Northwest through the summer season

Fuels Conditions

Even with the brief wet pattern, fuel conditions in the interior Northwest remain a significant concern. Below-normal snowpack from the 2025-2026 winter means less late-season soil moisture recharge than in typical years. Low-elevation grasses and shrubs are already curing at elevations where fire spread becomes most dangerous in summer. National fire fuel models show critically dry dead fuel moisture values developing across the Snake River Plain and southeastern Oregon earlier than average.

Residents and land managers should use this brief cooler period to advance fire preparedness activities — clearing defensible space, completing prescribed burns where conditions allow, and ensuring emergency readiness — before the expected onset of more fire-favorable weather patterns later in June and into July.