• Outdoor San Diego alerts

The smoggiest days of the year are most likely to occur during the next two months. Persistent temperature inversions (warmer air overlying cool marine air) are frequent this time of year. These inversions conspire with the mountainous topography of East County to trap locally generated air pollution under a low-lying lid. During the worst episodes, San Diego County's coastal area is the hapless recipient of additional smog sneaking down from the Los Angeles Basin. This often occurs when a Santa Ana wind condition begins to weaken: L.A. smog blown offshore by a Santa Ana may get pushed back our way when the normal sea breeze returns.

  • Outdoor San Diego alerts

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