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Old Advisory Events

The information herein is NOT intended for use as a weather forecast. The Air District DOES NOT forecast but solely compiles information from both the Phoenix and San Diego National Weather Offices to relay information concerning potential changes in ambient air concentrations that may impact the public.

May 22 2017
Be Advised
High wind levels have the potential to suspend particulate matter into the air. High levels of PM10 may pose an impact to public health. It is recommended that active children and adults, and people with respiratory disease, such as asthma, limit their outdoor activities.

Potential increases in PM10 concentrations may increase to moderate or unhealthy level.

Imperial County Weather Synopsis
High pressure aloft will continue the slow warming trend for inland areas through Tuesday. For coastal and valley areas...weak onshore flow will bring slow deepening of the marine layer with areas of night and morning low clouds and fog extending a little farther inland each night with slow cooling spreading inland. Cooling will spread farther inland on Wednesday as high pressure aloft begins to weaken. For Thursday and Friday...a trough of low pressure will bring stronger onshore flow with strong gusty west winds in the mountains and deserts. Cooling will take high temperatures to around 10 degrees below average for Friday. The marine layer will deepen into the inland valleys on Thursday and onto the coastal mountain slopes with a few light showers possible from the coast to the coastal slopes late Thursday night into Friday morning. High pressure aloft will bring an inland warming trend for the holiday weekend with areas of night and morning low clouds and fog for coastal areas, and in the lower to mid 90s in the upper deserts. Slow cooling is expected for the latter half of next week.
High pressure building in from the west will continue a gradual warming trend across the region through the middle of the week, with high temperatures rising well above 100 degrees at many lower desert locations. Somewhat cooler temperatures are likely to return by the latter portion of next week as low pressure once again moves into the western US.
Weather Story Phoenix Station Weather Story San Diego Station
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