Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0155 AM CDT Sun Jul 12 2020 Valid 121200Z - 131200Z ...Synopsis... A Pacific trough will move in across the northwestern US increasing westerly flow aloft and flattening a ridge centered over much of the Southwest. Increasingly gusty winds and dry surface conditions are expected to support Elevated fire weather conditions through much of the western US. Across the eastern US, mid-level troughing is forecast to remain in places supporting widespread shower and thunderstorm potential, limiting overall fire weather conditions. ...Intermountain West/ Snake River Valley... Height falls from the Pacific trough are expected to overspread the area early in the day suppressing the ridge of high pressure. Westerly flow aloft will increase in magnitude helping to bolster gusty surface winds to around 15-25 mph. With surface RH of 10 to 15% expected, widespread Elevated and locally critical fire weather conditions appear likely. ...Northern Great Basin... Gusty surface winds of 15-20 mph are expected to develop in proximity to a slow moving frontal boundary moving into the northern Great Basin. Increasing flow aloft will also support an increase in boundary-layer flow during the afternoon hours. Dry surface conditions are expected with RH around 10 to 15%. Elevated fire weather conditions appear likely with fuels receptive to fire spread. ...Dry Thunder eastern Utah into western Colorado... Mid-level moisture under and on the periphery of the retreating ridge will support thunderstorm development along the higher terrain in the afternoon and evening hours. Model soundings show sufficient buoyancy atop a deep and well-mixed boundary layer to support several dry thunderstorms, particularly across eastern Utah. Fuels are quite dry and lightning activity is expected to be widespread enough to warrant an Isolated Dry Thunder area. ..Lyons.. 07/12/2020 ...Please see www.spc.noaa.gov/fire for graphic product...Read more
from SPC Forecast Products http://www.spc.noaa.gov/products/fire_wx/fwdy1.html
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