Valid 080100Z – 081200Z
…THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PORTIONS OF
A marginal tornado threat continues early this evening across
portions of northern California.
Upper trough is gradually progressing toward the CA coast. One
notable upper vort max has translated inland near the CA/OR coast
and this appears to have contributed to some veering in the
low-level flow near the coast. However, farther inland,
boundary-layer winds remain more southerly in the Sacramento Valley
where a few longer-lived updrafts persist. While vertical shear
remains supportive of supercells, buoyancy is a bit scant for strong
updrafts. Will maintain 2% tornado probs for a brief weak tornado
the next few hours, but overall threat appears to be rather low and
likely diminishing after 03z.