


Fire Weather Outlook Discussion
Issued by NWS
Issued by NWS
532 FNUS22 KWNS 071958 FWDDY2 Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Tue Oct 07 2025 Valid 081200Z - 091200Z ...NO CRITICAL AREAS... ...Western U.S.... An upper-level trough moving into the Pacific Northwest and resultant increasing southwest winds aloft across the western U.S. will promote breezy southwest winds of 15-25 mph across portions of Upper Colorado River Plateau, Great Basin and northeastern CA/south-central OR Wednesday. A well-mixed and dry boundary layer will support minimum relative humidity values in the 15-20% range with some localized values around 10%. However, fuels remain largely unsupportive of significant wildfire spread with expected ERC values largely at or below the 60th percentile across the region. ...Northern Plains... An increase in southerly return flow across the Northern Plains as surface high pressure moves into the Great Lakes is expected Wednesday. A residual dry, post-frontal air mass across the Upper Midwest will be in place but stronger south winds should be displaced to the west of where RH values of 20-25% are expected, limiting fire weather concerns across western MN and eastern ND Wednesday. ..Williams.. 10/07/2025 .PREV DISCUSSION... /ISSUED 0209 AM CDT Tue Oct 07 2025/ ...Synopsis... Upper ridging will dominate much of the central U.S. as a mid-level trough ejects into the Atlantic and another trough amplifies over the Interior West tomorrow (Wednesday). Surface high pressure will overspread the CONUS east of the Mississippi River while surface lee troughing develops over the northern Plains, and a surface low strengthens over the Pacific Northwest. Dry and occasionally breezy conditions may develop over the Interior West, though fuels that are poorly receptive to wildfire spread will limit wildfire-growth potential. Across the northern Plains, the lack of lower RH will limit wildfire-spread potential in this area as well. As such, overall quiescent fire weather conditions are expected over the CONUS for Wednesday. ...Please see www.spc.noaa.gov/fire for graphic product... $$