####018001492#### FNUS21 KWNS 120630 FWDDY1 Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0129 AM CDT Tue May 12 2026 Valid 121200Z - 131200Z ...Synopsis... An upper level low will approach the northwestern U.S. coastline as troughing and an associated mid-level low traverse the Upper Midwest and Great Lakes region. Between surface high pressure centered over southern MT and an eastward propagating surface low towards the Great Lakes, tightened pressure gradients will encourage strong deep-layer northwesterly flow to overspread a well-mixed post-frontal airmass across the mid-upper Missouri Valley. While RH reductions will be modest in the post-frontal airmass (around 20-30 percent), 15-25 mph sustained northwesterly winds (localized gusts up to 35 mph) amid very dry fuels will support Elevated fire-weather conditions. A swath of stronger sustained northwest winds between 20-30 mph (localized gusts up to 45 mph) will impact the eastern Dakotas into the mid-upper Missouri Valley. However, this corridor of stronger winds will be displaced to the east of a warmer, drier boundary layer and atop fuels recently transitioning to green up. While RH values are expected to remain above 25 percent within this region, locally critical fire weather conditions may emerge in areas of stronger winds and lower RH. ..Elizalde-Garcia.. 05/12/2026 ...Please see www.spc.noaa.gov/fire for graphic product... $$ ####018002702#### FNUS22 KWNS 120633 FWDDY2 Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0132 AM CDT Tue May 12 2026 Valid 131200Z - 141200Z ...CRITICAL FIRE WEATHER AREA FOR NORTHEASTERN MONTANA INTO FAR NORTHWESTERN NORTH DAKOTA... ...Synopsis... An upper level low will move onshore the Pacific Northwest and transform into an open trough as it moves farther inland. Wedged between western U.S. troughing and an amplifying longwave trough over the eastern U.S., upper ridging will slide over the Rocky Mountain region. Associated with the substantial mid-upper level pattern, a rapidly evolving lee-side low in the southern Canadian Prairies and deepening lee surface troughing over the Great Basin and High Plains will present a multifaceted fire weather setup across portions of the Intermountain West. ...Northern Montana... In the southern Canadian Prairies, a rapidly evolving lee low will promote a dry return flow pattern across the northern High Plains. A Critical fire weather risk was introduced for northeastern MT and far northwestern ND where sustained southeasterly winds of 20-25 mph and 15-20 percent RH will overlap an exceptionally dry fuelscape. Widespread south-southeasterly winds of 15-20 mph amid 20-25 percent RH will promote elevated fire weather concerns across much of central-eastern MT. Fast moving, high based showers and thunderstorms with limited precipitation are expected across central and northern MT as broader ascent materializes ahead of an incoming trough. Resultant instability and a dry boundary layer could encourage a few lightning ignitions where receptive fuels exist. An IsoDryT area was introduced to account for this threat. ...Portions of the Southwest into the Snake River Plain and Colorado River Basin... As the sharp upper trough and associated mid-level jet shifts over ID into western MT, deepening surface troughing across the northern Great Basin and stronger southwesterly flow ahead of the trough will bring fire weather concerns to much of the Intermountain West. Southwest winds of 15-25 mph amid very low RH and drying fuels under successive days of abnormally high temperatures will support an Elevated fire weather threat across the region. Daytime instability and increasing mid-level moisture will promote high based convection along the higher terrain of the Four Corners through central WY into the Wyoming Basin. Sporadic lightning ignitions are possible where drier fuels exist, promoting an IsoDryT area. ..Elizalde-Garcia.. 05/12/2026 ...Please see www.spc.noaa.gov/fire for graphic product... $$