The San Diego area is bracing for a significant warming trend with temperatures expected to climb well above seasonal averages by Thursday, according to the National Weather Service San Diego. Coastal regions should see highs between 71 and 78 degrees, while inland valleys might bake in the 80 to 85-degree range, a notable jump from usual temperatures this time of year, with some daily high records potentially in danger. In concert with the strengthening high-pressure system, a stronger onshore flow is also anticipated, which could result in gusts of up to 35 to 45 mph in the San Bernardino County mountains and deserts.
Entering the weekend, a slight respite from the heat is expected as weak onshore flow starts to introduce cooler air into the region beginning Friday. While Saturday may feel a few degrees chillier, temperatures will remain substantially above what's typical for mid-December. The high desert is forecasted to stay decidedly warm, with expected highs still 15 to 20 degrees above the norm, according to information provided by the NWS San Diego, despite the onshore breezes that tend to bring cooling relief.
In aviation news, coastal fog has been causing visibility issues; a Dense Fog Advisory was in effect until 10 AM PST this morning, notably impacting regions such as Orange County Coastal Areas, San Diego County Coastal Areas, and other locales. While navigation through marine areas has been complicated by low visibility, no additional hazardous marine conditions are expected through Sunday, as detailed in the Area Forecast Discussion from NWS San Diego.
