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.

June 29 2016
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 inland today as high pressure over the Four Corners region begins to weaken. Slight chance of a thunderstorm over the San Bernardino county mountains this afternoon. A Cooling trend will develop and lower high temperatures to near or slightly below normal by Friday. Breezy southwesterly winds in the afternoon in the mountains and deserts later this week, with a moderately deep marine layer west of the mountains.

An upper-level trough moving across northern CA late this week will lower heights over the region, strengthen onshore flow, and create a moderately deep marine layer the end of the work week through early next week. Breezy southwesterly winds will develop in the afternoons through mountain passes and in the deserts. Highs will lower to near normal to slightly below normal by Friday, and continue into the beginning of next week. Night and morning low clouds/fog is expected along the coast and over the western valleys through the period

SYNOPSIS FROM THE PHOENIX OFFICE
High pressure will move somewhat north and east of Arizona this week allowing warm temperatures to prevail, but also bring a couple of weather disturbances through the state. An increase in monsoon moisture will accompany these weather systems, providing a threat of afternoon and evening showers and thunderstorms the remainder of week. As moisture increases over south central Arizona, high temperatures will fall with some locations dropping below 100 degrees on Friday. There will be a return to drier southwest flow aloft over the weekend and into early next week which will limit thunderstorms to higher terrain areas east of Phoenix by Sunday. High temperatures will steadily climb late this week and early next week as the atmosphere becomes drier.
Weather Story Phoenix Station Weather Story San Diego Station
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