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.

September 29 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
DISCUSSION FROM THE SAN DIEGO OFFICE
High pressure aloft will bring us another warm day across the region with inland temperatures in the 90s. A sizable low-pressure trough will move through the Pacific Northwest and into the interior West this weekend.

For Southern California that will increase our onshore flow and spin up a coastal eddy. Tonight we expect patchy dense fog to develop again, but lift on Saturday.

A shortwave in that big trough to the north will add strength to the onshore flow and maintain a pretty robust coastal eddy Monday and Tuesday. That will mean cooler days and more clouds west of the mountains. The increased onshore flow will also produce areas of strong winds through mountain passes and into adjacent deserts each afternoon and evening Saturday through at least Tuesday.

FROM THE PHOENIX OFFICE
High pressure aloft and weak surface pressure gradients to keep skies mainly clear. Winds mainly at or above 9 miles per hours. Wind direction to remain mainly westerly to northwesterly at Imperial County Airport with typical trends at the Blythe Airport
Weather Story Phoenix Station Weather Story San Diego Station
Image for Phoenix Station Weather Story Image for San Diego Station Weather Story

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