Fire Weather Outlook Discussion
Issued by NWS
Issued by NWS
450 FNUS21 KWNS 201617 FWDDY1 Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1116 AM CDT Fri Sep 20 2024 Valid 201700Z - 211200Z ...Update... The latest model data suite continues to suggest elevated fire weather conditions for this afternoon across portions of eastern WY due to warm, dry, and breezy westerly downslope flow. Another area of minor concern will be ahead of an approaching upper level trough from southeastern NM through the Caprock of TX. A narrow corridor of drying, and southwest sustained winds near 15 to 20 mph, could support a couple of hours of localized elevated fire weather there. However, recent trends in relatively higher boundary layer moisture and increasing cloud cover over this region (less mixing expected) do not warrant an additional Elevated area at this time. Please see the previous discussion for details pertaining to the Southwest. ..Barnes.. 09/20/2024 .PREV DISCUSSION... /ISSUED 0132 AM CDT Fri Sep 20 2024/ ...Synopsis... ...Central/Northern Plains... A shortwave trough moving across the Canadian Provinces will bring enhanced westerly flow across the northern Rockies. Warm and dry downslope flow east of the Bighorn Mountains will be likely across eastern Wyoming into portions of far southeastern South Dakota. A period of elevated fire weather conditions will be likely, with relative humidity reductions to 10-15% amid sustained westerly winds 15-20 mph. Fuels within this region are sufficiently dry to support wildfire spread, with little observed rainfall in the last 30 days. ...Southwest... An enhanced belt of mid-level flow within a deepening mid-level low will spread across the Southwest. Boundary-layer mixing into this strong deep-layer flow will favor dry/breezy conditions across portions of western NM and eastern AZ during this afternoon. Locally elevated fire-weather conditions will be possible. Fuels across the southwest are generally unsupportive of large-fire spread at this time. Elsewhere, a minimal overlap of breezy surface winds and low RH should limit fire-weather concerns. ...Please see www.spc.noaa.gov/fire for graphic product... $$