Fire Weather Outlook Discussion
Issued by NWS
Issued by NWS
657 FNUS28 KWNS 232157 FWDD38 Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0455 PM CDT Mon Jun 23 2025 Valid 251200Z - 011200Z ...Synopsis... A deamplifying upper-level trough over the Great Basin and diminishing mid-level flow will usher in lighter winds for the Four Corners region and Southwest for Day 3/Wednesday. An upper-level trough will gradually translate eastward along the Northern Tier from the Pacific Northwest on Day 5/Thursday into the Great Lakes by Day 8/Monday. An amplifying ridge across the Intermountain West early next week will promote lighter surface winds but well above normal temperatures for much of the Western U.S. ...Day 3/Wednesday... Enhanced downslope winds and drying aided by accelerating mid-level flow ahead of an upper-level trough is expected across northeastern California/northwestern Nevada Wednesday. However, fuels remain marginal in terms of spread potential precluding critical probabilities at this time. ...Day 4-7/Thursday-Sunday... With active wave pattern farther north, muted mid and upper-level flow and weak surface pressure gradients will promote lighter, mainly terrain driven winds across much of the Intermountain West and Southwest late this week, into early next week. ...Day 8/Monday... Long term ensemble guidance indicates another upper-level trough encroaching upon the Pacific Coast Day 8/Monday, potentially ushering in fire weather concerns across the Great Basin (dry and breezy ahead of the trough) as well as dry lightning potential across the Oregon Cascades. Considerable uncertainty exists in the magnitude of moisture ahead of the trough, precluding introduction of dry thunderstorm probabilities in the long term. ..Williams.. 06/23/2025 ...Please see www.spc.noaa.gov/fire for graphic product... $$