Heat Wave #3 Starts Friday
Temperatures were dramatically cooler on Wednesday as marine air spilled into the south valley. Highs failed to reach 90° marking a 10-degree cool down from Tuesday. Meantime, mountain and desert readings were about the same as Tuesday or a bit warmer. The entire county and all of central California will be seeing much warmer weather beginning Thursday with the arrival of upper level high pressure moving in from the east.
We will see the development of an offshore, or easterly wind that is certain to cause downslope warming. Highs in Bakersfield on Thursday should be nearly 10 degrees warmer and further heating of the atmosphere is expected for Friday and the weekend. Highs will top out around 98° tomorrow, but triple digits are forecast for the rest of the 10-day period.
There have been two changes in today's forecast. First, monsoonal moisture for this weekend is looking less likely. I've kept a 10% chance for thunderstorms on Sunday and Monday in the mountains and desert. Second, cooling near the end of the forecast period and the end of Heat Wave #3 is now looking less likely. A trough of low pressure was indicated by computer models by the following weekend- August 2nd and 3rd. But now it appears that the trough will form farther to the north and west. A strong ridge is shown to hold through the period.
So the upcoming heat wave, with daytime readings in the 103 to 108 degree range, is now expected to remain longer. Some hot times are right around the corner after our brief respite in the 80s and 90s.
6:25 pm 7-23-14 Chief Meteorologist MILES MUZIO