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Hot inland weather settles in

Posted at 5:56 PM, Jul 23, 2019
and last updated 2019-07-23 21:19:51-04

A ridge of high pressure across The West will increase inland temps and also open the door for some increasing mid-level humidity. This will mean the high country of SLO county will have the combination of hot and humid conditions. An advisory is posted thru Wednesday evening.

Heat advisory in place into Wednesday evening. High temps inland look to be 100-110 and with a humidity component which…

Posted by Dave Hovde-KSBY on Tuesday, July 23, 2019

Even though some of the interior valleys are not covered by the advisory (due to missing humidity), there will also be much of the SLO county interior experiencing 100-106 degrees Wednesday.

Heading to the fair tomorrow? It'll be the hottest day…but Saturday also looks blazing. Keep in mind there are…

Posted by Dave Hovde-KSBY on Tuesday, July 23, 2019

A large Four Corners upper level high pressure system will remain in place through Wednesday. This promotes high pressure, a limited marine layer and monsoonal flow which not only can bring muggy air north but also a slight risk of thunderstorms for higher elevations in Ventura county (and possibly SB county) some drifting showers are also possible in the SB channel pushing north.

There is some mid-level moisture moving up from the south. This band "could" produce a sprinkle or shower locally…

Posted by Dave Hovde-KSBY on Tuesday, July 23, 2019

Varying amounts of mid-level clouds should move into the forecast area tonight through Thursday, with partly cloudy skies overall. Skies are then expected to become mostly sunny in all areas by Friday afternoon.

In addition, the marine inversion will remain very shallow thru Friday, with any night and morning low clouds and fog expected to be limited to the immediate Central Coast thru the period. Patchy dense fog will be likely with any low clouds thru Friday morning.

Inland temps look to cool a tiny but Thursday to about 95-100 before returning to 100+ Friday and Saturday. Coastal valleys will be in the upper 70s to mid 80s. Beaches will hit the 70s Wednesday but cool a bit Thursday into the weekend with some better onshore flow.

The "four-corners high" forms when the jet has a ridge over The West. The clockwise flow draws subtropical moisture up…

Posted by Dave Hovde-KSBY on Tuesday, July 23, 2019

The ridge will vary in strength in the extended outlook but I think remains into about Monday before it slides more significantly to the east.

A more interesting monsoon push could arrive Aug. 2-4th. It has been showing up regularly on model runs. Probably not as hot but more muggy than currently and potentially monsoon rains sneaking this far west, just something to watch at this point if you ask me.