National Weather Service United States Department of Commerce

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Click a location below for detailed forecast.

Last Map Update: Fri, Jul 31, 2026 at 3:50:50 pm MDT

Dry conditions are expected to persist across the Northern Rockies for the foreseeable future. With deep southwesterly flow transporting smoke from active fires in Washington and Oregon, air quality will likely remain poor, and it may get worse before it gets better. We remain locked into a synoptic setup featuring elevated fire weather conditions. Specifically hot, dry, and breezy weather. This pattern continues to stream smoke into the region, degrading air quality and reducing visibility. - Stay cool and limit outdoor exposure when smoke is thickest. - Check in on vulnerable neighbors, friends, and family, especially those without air conditioning or with respiratory ailments. - Always check the back seat for pets or children.
Breezy conditions are expected across Western Montana and North-Central Idaho this Saturday and Sunday, August 1st and 2nd. Sustained westerly winds of 10 to 25 mph are forecast, with afternoon gusts reaching 25 to 45 mph. These winds will create choppy, hazardous conditions on area lakes and waterways. Those floating local rivers, such as the Clark Fork, may encounter strong headwinds pushing upriver. At home, residents should secure lightweight yard decor and patio furniture. Additionally, these dry, windy conditions will further elevate the regional fire danger. Please exercise extreme caution to prevent sparking any new wildfires.

 

Text Product Selector (Selected product opens in current window)