AIR POLLUTION
CONTROL DISTRICT

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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.

August 31 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
SYNOPSIS FROM THE SAN DIEGO OFFICE
Hot weather will continue through the weekend and into next week with nearly stationary high pressure over the Western US. Monsoon moisture will bring chances of thunderstorms each day, mainly over the mountains. Tropical Storm Lidia, currently just South of the Southern Baja California Peninsula, is forecast to move northward, but eventual dissipate as it begins to turn more westerly near Central Baja. Peripheral moisture from this system may move into Southern California early next week, potentially increasing the risk of showers and thunderstorms.
SYNOPSIS FROM THE PHOENIX OFFICE
Above normal temperatures will continue through Friday, but will trend sharply downward this weekend as deeper tropical moisture moves into the area from the south. Thunderstorm chances will remain very limited across lower desert communities through the rest of the work week with activity focused mainly over mountain areas. As moisture and humidity increase this weekend, the threat of showers and thunderstorms increases especially over the southwest Arizona and far southeast California deserts. Drier and warmer conditions return early next week along with isolated mainly afternoon and evening thunderstorms.
Weather Story Phoenix Station Weather Story San Diego Station
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