The usual summer vibes in San Diego are getting a bit of a shake-up, according to the National Weather Service San Diego. Thunderstorms aren't quite finished yet; monsoonal moisture is expected to bring a 15 to 25 percent chance of storms across the mountains and deserts this afternoon. As we move towards the weekend, a drying trend is on the horizon thanks to a low-pressure system cruising along the West Coast. This trend is set to bring drier southwest flow aloft and a welcome drop in temperatures, with Friday through Sunday expected to be near or below seasonal averages. The National Weather Service San Diego also reports a gradual increase in low clouds at night and in the morning along the coast as the atmosphere dries out.
For those enduring the mugginess, relief can't come soon enough. But not too fast—today still brings widely scattered thunderstorms after an uptick in precipitable water values recorded late Tuesday. The NWS expects peak rainfall rates to range from 0.25 to 0.50 inches per hour. While the drying trend will continue on Thursday and Friday, coastal residents can still expect patchy low clouds. The turning point will be over the weekend as more substantial drying occurs.
According to the National Weather Service, inland temperatures have increased and will continue to sizzle through Thursday. By Friday, they're forecasted to cool down. Lower deserts will hover between 105 and 110 degrees, while the Inland Empire is expected to be cooler, with highs ranging from the mid-80s to mid-90s. Despite the boiling points, a slow warming trend is expected by early next week, bringing humidity back.
Clear skies are ahead for those hitting the skies or seas. There's a moderate chance of thunderstorms over the mountains today, with possible extensions into the adjacent valleys. However, pilots and mariners can breathe easy as the marine forecast promises no hazardous conditions through Saturday. Although the NWS isn't sounding the alarm for Skywarn activation, they're giving a heads-up to weather spotters to report any significant conditions.
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