Fire Weather Outlook Discussion
Issued by NWS
Issued by NWS
512 FNUS28 KWNS 222145 FWDD38 Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0443 PM CDT Wed Jul 22 2026 Valid 241200Z - 301200Z Upper-level troughing will develop over the Pacific Northwest into the northern Rockies late this week through the weekend. Mid-level southwest-westerly flow of 30-60 knots will overspread the region with a tightening onshore pressure gradient and lee troughing east of the Cascades and northern Rockies. The Four Corners High will likely slowly shift east-southeast towards the southern High Plains, with daily monsoonal thunderstorms remaining likely across the greater Four Corners region into early next week. ...Northwestern US... Overall, a critical fire weather pattern will continue to unfold through the weekend across the northwestern US with lightning followed by hot, dry, and windy conditions. Elevated to critical fire weather conditions are expected across the Inland Northwest, northwest Great Basin, and extending through northern Montana Day 3/Friday as west-southwest winds strengthen amid a drying and warming airmass. Critical winds/RH are likely to develop across portions of north-central and northeast Montana, but this will likely act more as a curing event. Winds will strengthen on Day 4/Saturday across the Inland Northwest and into northwest Montana, with critical conditions expected again here and from south-central/southeast Oregon extending into northeast California, northwest Nevada, and southwest Idaho. Isolated to scattered mixed wet/dry thunderstorms are likely in portions of central Montana on Day 4/Saturday, but there remains too much uncertainty regarding the overlap of receptive fuels and drier thunderstorm development to include dry thunderstorm probabilities at this time. However, dry and breezy conditions are likely across portions of western/central Montana Day 4/Saturday. Dry and breezy conditions will continue from the northwest Great Basin through central/southern Idaho into Montana on Day 5/Sunday and possibly Day 6/Monday. There remains forecast uncertainty regarding lingering dry and breezy conditions across portions of the Inland Northwest, and the likelihood of critical conditions in portions of the northwest Great Basin and northern Montana. Much of this depends on the evolution of the upper-level troughing over the northwest US. Another source of forecast uncertainty is how areas that currently have less receptive fuels in portions of northeast Nevada, central/eastern Idaho, and southwest Montana will respond to multiple consecutive days of hot, dry, and breezy conditions. ...Plains... Hot, dry, and breezy conditions will likely develop across portions of the Plains during the outlook period. Fuels, especially fine fuels, will begin to cure and perhaps rapidly. How this pattern affects these areas will continued to be monitored. ..Nauslar.. 07/22/2026 ...Please see www.spc.noaa.gov/fire for graphic product... $$