Santa Ana winds are pushing a warm-up into San Diego County this week, increasing the chance for wildfires and prompting a heat advisory for the inland valleys.
NBC 7 Meteorologist Sheena Parveen said temperatures were expected to be 10-13 degrees above average for this time of year. Some records may be broken Friday in the inland areas, she added.
A heat advisory for the inland valleys has been extended until 7 p.m. Saturday, according to the National Weather Service, when temperatures in the mid 90s are expected. No advisory was in effect along the coast but a warm-up was still expected.
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Mild Santa Ana winds with gusts in the 25-35 mph range combined with a drop in humidity and hot temperatures are also creating a perfect combination for potential wildfires to spark and grow quickly. No fire weather watches or red flag warnings were in effect.
A slight cool-down may come over the weekend as onshore flow returns near the coast, Parveen said.
Night and morning coastal low clouds and fog were expected to increase in coverage by Sunday and Monday.
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A weak trough of low pressure off the Southern California coast for the weekend may draw some tropical moisture northward, forecasters said. Weak onshore flow and a weak coastal eddy were likely to begin to bring some cooling near the coast on Saturday with that cooling gradually spreading inland through early next week.
High temperatures for the coast and valleys would return to around average on Tuesday with high temperatures for the lower deserts only falling slightly into the upper 90s, the NWS said.
Night and morning coastal low clouds and fog may increase in coverage by Sunday and Monday and spread a little farther inland, possibly into the far western valleys, for early next week.
Editorial note: A previous version of this story said the heat advisory was also in effect for the coast. No advisory has been issued for that area.
