SAN DIEGO - Turn on the fans, crank up the air conditioning, or run into the ocean...whatever it takes to stay cool. Today will be the hottest day of the week with highs 5 to 10 degrees above average. Friday will be slightly cooler but still uncomfortable.
High pressure will spread west over the next few days causing the marine layer to become more shallow and the heat and humidity to increase. The mountains and desert will be so hot that a Heat Advisory goes into effect for those areas at 11am through 9pm Friday. Mountain mercury will soar to 93-105°. The desert will be scorching at 111-118°.
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THURSDAY'S HIGH TEMPERATURES:
- COAST: 76-85
- INLAND: 89-100
- MOUNTAINS: 90-101
- DESERTS: 112-118
Winds turn from a dry southwesterly flow to a more moist southeasterly flow bringing increasing humidity into the weekend. A cloudier sky will decrease the temperatures, but with the added humidity, you won't even feel it.
As more monsoonal moisture comes our way this weekend it will be a little muggy as San Diego hosts Comic Con. The coastal areas and downtown will not feel it as much as in the inland valleys and mountains. Friday there will be a slight chance for a stray shower or thunderstorm in the mountains, though any rain will struggle to make it to the ground (virga). Saturday and Sunday afternoon there is a better chance for isolated showers or thunderstorms in the mountains.
10News Meteorologist Megan Parry