Southern California is experiencing a temperature fluctuation, according to the National Weather Service in San Diego. Today's highs show slightly cooler weather, offering a brief respite from the heat for inland dwellers, though desert areas remain persistently warm. NWS San Diego reports high temperatures are expected to rebound on Sunday and Monday, trending about 5-10 degrees above the norm for this time of year in desert regions.
A respite is on the horizon as "cooler weather returns on Tuesday and prevails into the end of the week," according to the NWS forecast. The nearly 2,000 feet in depth marine layer will bring night and morning low clouds across coastal areas, extending into the western valleys. This influence is somewhat standard for July, but the specifics of this pattern have brought cooler conditions to coastal zones while inland temperatures hover above average.
The Area Forecast Discussion released by the National Weather Service San Diego notes that the large upper-level high-pressure ridge will remain in place but will be slightly weakened by early next week. A low-pressure trough and a couple of inverted troughs could introduce monsoonal moisture and raise the possibility for some convection on Monday afternoon, although probabilities remain low.
As we progress into the week, there are indications of a return of some monsoonal moisture for Thursday into next weekend, as mentioned in the continued forecast, despite a greater spread among model solutions leading to uncertainty in the prediction. Daytime high temperatures in the lower deserts are expected to remain in the 106-112 degree range during this time, which indicates a significant, but not abnormal, degree of warmth for residents and travelers alike.
