Hot Tuesday developing

Posted at 4:36 PM, Sep 23, 2019
and last updated 2019-09-23 20:48:55-04

A bit of weather whiplash this week. Today temps dropped from over the weekend, but they jump right back up Tuesday. Offshore winds will be the reason why. 90s and some triple digits for the valleys and even the beaches into the mid 80s. The warm up will justify the issuance of a one day heat advisory for the Central Coast.

It isn't a particularly strong wind driving this Santa Ana/Santa Lucia event. Some local offshore gusts to 25mph but most folks won't see winds that strong.

Wednesday winds weaken as the upper low driving the event moves into northern Mexico so just minimal breezes at best. This should lead to a 5-10 degree drop in temps across coast/valley areas, which still keeps temps above average but not worthy of a heat advisory. Interior areas of SLO County will probably warm a few degrees.

Models continue to struggle with the deeper extended forecast. Right now it looks like everything is slowing down: the departure of the upper low and the arrival of cooler air. I don't think we'll see rain this week. There were chances which counted on some subtropical supply interacting with the new trough but doesn't look like everything is lining up.

It does look like much cooler air arrives for the weekend. The cool pattern is expected to continue into early next week. The cooler inland air should wipe out any inversion so clouds that form shouldn't be persistant next week.