Quite a change today…the marine air surged inland overnight, giving us low clouds and much cooler temps. We dropped from 95 yesterday to 82 today.
Tomorrow the marine layer should be a little thinner, so I boosted the high temp a few degrees.
Saturday and Sunday are real interesting. Offshore flow briefly develops Saturday afternoon and night. That should push temps up to 90 or a little above with 850mb temps jumping up to +20 or so. That will probably be our last 90 degree day of the season. Then on Sunday a fast-moving upper level trough swings through with MUCH cooler air. 850mb temps go from +21 Sunday morning to +6 24 hours later! Thus we’ll be going from summer heat to fall “chill” pretty quickly. It should be invigorating! You can see the dramatic drop in the 12z ECMWF ensemble chart:
The rest of next week will be dominated by cooler than average weather and showers at times. By the way, here are the 4 weekly ECMWF 500mb height ensemble maps from last nights’ run:
Chief Meteorologist Mark Nelsen