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Day 2 Fire Weather Outlook  
NWS Storm Prediction Center Norman OK
0218 AM CDT Tue Aug 30 2022

Valid 311200Z - 011200Z

...Synopsis...
Regional fire weather concerns are expected across parts of the
Pacific Northwest for Wednesday afternoon. A weak upper-level
disturbance, currently noted in water-vapor imagery off the West
Coast, is forecast to advance northward into the Pacific Northwest
through the day Wednesday. Increasing zonal winds over the northern
Sierra Nevada and Cascades will increase downslope flow and gap
winds during the afternoon hours. Ensemble guidance shows reasonably
strong probability for 15-20 mph winds across far northeast
CA/northwest NV into southern OR. Given antecedent warm/dry
conditions and receptive fuels, this will likely coincide with
afternoon RH minimums in the low to mid teens to support elevated
fire weather conditions. Elevated conditions are also possible
through the Columbia Gorge, but may be more localized in nature. 

...Dry Thunderstorms...
A modest influx of mid-level moisture co*bined with weak ascent
ahead of the upper disturbance should be sufficient for isolated
thunderstorms across central to northern WA and northern ID
Wednesday afternoon. Forecast soundings show favorable thermodynamic
profiles for weak convection, with cloud bases between 3-4 km AGL
and boundary-layer mean RH as low as 15%. Hi-res ensembles support
this idea with a modest convective signal in a region of reduced
PWAT values near 0.75 in., further hinting at the potential for dry
lightning. Given the dry fuels across the region and recent fire
activity, lightning-driven highlights are introduced.

..Moore.. 08/30/2022

...Please see www.spc.noaa.gov/fire for graphic product...