Day 1 Severe Weather Outlook

Valid 090100Z – 091200Z


A few thunderstorms may occur late tonight from coastal southern
Oregon into northern California.

…01z Update…

Strong mid-level jet is forecast to dig toward the northern CA coast
late tonight. Substantial cooling aloft will aid steepening lapse
rates across OR into northern CA as -28C at 500mb settles into this
region along the cyclonic side of the jet. However, 00z sounding at
MFR suggests this cooling remains offshore as a fairly warm nose
currently exists around 4km. Threat for deep convection will be
delayed until this warm layer is removed. Even so, lightning should
remain quite isolated given the expected weak buoyancy.

..Darrow.. 01/09/2020


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