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.

October 2 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
A deepening trough over the West will result in cooler, breezy weather through Tuesday along with a deep marine layer. It will turn a little warmer Wednesday and Thursday as the trough weakens. More significant warming will take place Friday through Sunday as high pressure aloft builds over the Southwest.
More specifically, A trough is in place across the west to start the work week, but by week`s end Southern California will be under the influence of an expansive ridge of high pressure. The result will be an onshore wind flow pattern/below normal temps transitioning to weak offshore flow/hotter temps by the upcoming weekend. In the near term, winds have become quite gusty through and below passes and along desert mountain slopes. Peak gusts of 50 mph have been registered at Whitewater (typical windiest location on the desert side of the San Gorgonio pass), but gusts across the rest of wind-prone areas on westerly flow have been in the 30-40 mph range and do not expect much if any increase in the winds this morning, so will not issue a Wind Advisory.
SYNOPSIS FROM THE PHOENIX OFFICE
A brief cooling trend will continue today as a low pressure system settles across the intermountain West. Operational and ensemble guidance continues to indicate that an anomalously strong anticyclone across the northern Gulf will retrograde into northern Mexico through the week. This will result in a gradual warming trend across the Desert Southwest, with temperatures again flirting with the 100 degree mark across the lower deserts late in the week. Above normal temperatures will return Tuesday along with a warming trend into the weekend. There will be a slight chance of showers and thunderstorms across far eastern Arizona during the midweek period as southwesterly flow develops between a building area of high pressure and a persistent low pressure system across the western states.
Weather Story Phoenix Station Weather Story San Diego Station
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