July's Gray Skies

From blistering heat a couple weeks ago to well below normal temperatures on the 20th and 21st shows the wide variety of weather the Bay Area can experience during the summer. Ocean temps were running extremely cold, upper 40s, during June. By early July, we lost the upwelling and SST's (sea surface temps) warmed to near 60. By the 21st, some cooler temps were back with low to mid 50s now being reported outside the Golden Gate and off the Marin Coast. Look for a decrease in the fog Tuesday and Wednesday as a more northerly breeze takes over and temps warm a bit. Fog should re-group to cool conditions down again by the weekend.

Of note: torrential thunderstorms dropped .86 on Palm Springs Sunday. Highs in Las Vegas and Palm Desert were barely able to reach 90. Flooding was reported in Palm Springs. Thunderstorms will continue in the Sierra and Northeast California with Flash Flood Watches posted for Reno as well. Tahoe/Truckee are not under the watch but afternoon showers are possible. An area of Low Pressure is moving in off the Mendocino Coast. This is adding the lift and instability. It's also increased the fog for us along with wind for cooler daytime highs.