


Fire Weather Outlook Discussion
Issued by NWS
Issued by NWS
989 FNUS22 KWNS 151955 FWDDY2 Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0254 PM CDT Sun Jun 15 2025 Valid 161200Z - 171200Z ...CRITICAL FIRE WEATHER AREA FOR PARTS OF SOUTHERN NEVADA...SOUTHWESTERN UTAH...AND FAR NORTHWESTERN ARIZONA... ...Southern Nevada, Southwestern Utah and far Northwestern Arizona... Modest mid-level flow associated with a progressive upper-level trough will move into the Great Basin and Southwest Monday. A very dry, well-mixed boundary layer will support low teens to single digit relative humidity values across the region. A corridor of 20-30 mph winds are most likely from southern Nevada into south-central Utah where very low daytime humidity will support Critical fire weather conditions amid dry fuels. ...Columbia Basin... The upper-level short wave translating through the Pacific Northwest Monday will contribute to enhanced downslope winds particularly across the western portions of the Columbia Basin. West winds of around 15 mph combined with relative humidity in the 15-25 percent range will result in elevated fire weather concerns for central Washington state and Columbia River Gorge where ongoing fire activity remains. ..Williams.. 06/15/2025 .PREV DISCUSSION... /ISSUED 0156 AM CDT Sun Jun 15 2025/ ...Synopsis... During the day on Monday, a mid-level shortwave trough is expected to traverse California and into the Great Basin, and the surface mass response to this feature will tighten the sea-level pressure gradient across the area, resulting in strong surface winds. With seasonably strong vertical mixing, RH in the Great Basin and Four Corners region is expected to be around 5-15%. The best overlap of windy conditions and dry fuels is expected to be across parts of southeast Nevada, southwest Utah, and far northwest Arizona, where Critical highlights have been added. In this area, winds are expected to be near 20-30 mph with gusts as high as 35-40 mph underneath the core of the mid-level jet associated with the shortwave trough. Surrounding that Critical area, winds may be weaker and fuels less receptive to fire spread. However, this still warrants an Elevated area across parts of the Great Basin and Four Corners region. ...Please see www.spc.noaa.gov/fire for graphic product... $$