Fire Weather Outlook
— Day 1
Synopsis
A mid-level low pressure system currently off the west CONUS coast will move onshore tonight, bringing southwest to southerly flow over a good portion of the western US states today. Despite the delayed onset of stronger 40-50 kt mid-level winds until late afternoon/evening, a surface trough across the interior Northwest, coupled with modest southwest 15-20 knot boundary layer flow, will support southwest surface winds of 10-20 mph across northeastern CA, far northwestern NV, and south-central OR. Though high temperatures will fall short of normal for this time of year across much of the far western CONUS, afternoon RHs will fall to near 10-15% across much of the drawn area coincident with the aforementioned winds, supporting an Elevated fire weather risk this afternoon which will persist into the evening hours, particularly over the far western Great Basin.
000 FNUS21 KWNS 010603 FWDDY1 Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0103 AM CDT Tue Sep 01 2026 Valid 011200Z - 021200Z ...Synopsis... A mid-level low pressure system currently off the west CONUS coast will move onshore tonight, bringing southwest to southerly flow over a good portion of the western US states today. Despite the delayed onset of stronger 40-50 kt mid-level winds until late afternoon/evening, a surface trough across the interior Northwest, coupled with modest southwest 15-20 knot boundary layer flow, will support southwest surface winds of 10-20 mph across northeastern CA, far northwestern NV, and south-central OR. Though high temperatures will fall short of normal for this time of year across much of the far western CONUS, afternoon RHs will fall to near 10-15% across much of the drawn area coincident with the aforementioned winds, supporting an Elevated fire weather risk this afternoon which will persist into the evening hours, particularly over the far western Great Basin. ..Stearns.. 09/01/2026 ...Please see www.spc.noaa.gov/fire for graphic product... $$