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 16 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
Areas of low clouds at the coast this morning will clear by mid- morning. Greater coastal low cloud coverage Friday night into Saturday is likely. Temperatures will increase through the weekend, mainly inland. Sunday will be the warmest day with weak offshore flow. An upper level low pressure system could entrain moisture from the south Monday and Tuesday, bringing a slight chance of thunderstorms to the region, including coastal areas. A cooling trend will start Monday and continue through the middle of next week

Through Sunday...The extensive upper trough over the western U.S. will continue to stretch southwest-to-northeast as the parent low over the northern rockies moves east and the base of the trough over SOCAl extends to the southwest. By Sat morning a closed upper low forms over the coastal waters of Southern California, with an upper ridge building over NORCAL from the west. The closed upper low becomes cut off and drifts farther to the southwest, allowing heights to rise over socal and sfc high pressure over the central rockies to establish weak offshore flow on Sun. This will bring a warming trend with temps peaking on Sun when temps could reach the upper 90s in the inland valleys of San Diego County, and the low 100s in the Inland Empire.

SYNOPSIS FROM THE PHOENIX OFFICE
Dry air will be in place across the region through Sunday for clear skies and no chance of rain. Highs will be two to three degrees below normal today before warming two to three degrees above normal by Sunday. Next week, clouds and humidity will increase, leading to a return of shower and thunderstorm chances, along with cooler temperatures.
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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