Synopsis
A few degrees of cooling are expected today with temperatures returning to normal over the weekend. Morning low clouds and fog will return to many coastal areas by Friday and each day through early next week.
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Area Forecast Discussions are the real forecasts, written 3 to 4 times daily by NWS meteorologists reading the models and interpreting what they mean for your area. They offer far deeper insight than any weather app, but they're written in dense meteorological shorthand. Plaincast uses Anthropic's Claude to summarize them into plain English, side by side with the annotated original.
Revised in 6 passages since the 1:59 PM discussion. See every revision.
Short Term
Another hot day with temperatures 7-15 degrees above normal. However, onshore trends began today and the sea breeze has been able move in earlier and stronger resulting in 2-5 degrees of cooling area-wide today.
More significant cooling, roughly 5-10 degrees, expected Friday as a trough develops over the Pac NW further increasing onshore flow. Highs expected to be within a few degrees of normal in most areas except the far interior areas where highs near 100 are still expected for another day. And likely some increase in morning low clouds and fog for coastal areas.
Temperatures over the the weekend are expected to be near or even slightly below normal, though the remnants of TS Elida will be moving north-northwest which likely will increase humidities as PW's increase back to near 1.50". With that in mind there is a 5-10% chance of a shower or thunderstorm by Sunday over the mountains.
Long Term
Temperature trends remain pretty flat through Monday or Tuesday then models indicate a slow increase in high pressure next week with weakening onshore flow Wednesday through Friday which would result in a warming trend. There is roughly a 50-70% chance of highs in the lower 100s in the warmer valleys by Wednesday and around a 20% chance of 105. Downtown has around a 30-40% chance of reaching 90 by next Wednesday or Thursday while the deserts have a 60%-80% chance of at least lower 100s.
There is another tropical storm behind Elida next week but for now the upper level pattern favors a more westerly trajectory which would result in fewer impacts locally.
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