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 21 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 and dry weather will continue today, with the hottest conditions occurring over the inland valleys and lower deserts. Temperatures will return to near average values by early next week. A slight chance of showers and/or thunderstorms will arrive Sunday and Monday for the entire region. Drier and sunnier conditions are expected during the middle next week, as attention turns towards the next potential weather maker along the CA coast late Thursday into Saturday.

For today and tonight, expect temperatures to warm quickly again today given clears skies, weak subsidence and low RH. Warmest conditions should be over the inland valleys and lower deserts, with afternoon highs predominantly in the 90s. Along the coast, a weak afternoon sea breeze should limit temperatures. Continued low RH, clear skies and cooling below 800 mb should help temperatures drop this evening and overnight. No significant marine layer fog or stratus is expected overnight

SYNOPSIS FROM THE PHOENIX OFFICE
Dry weather with mostly clear skies will continue across the Desert Southwest through Saturday. Temperatures will also continue to be unseasonably warm. By Sunday, a large Pacific low pressure system will move into the western states. This will draw a considerable amount of subtropical moisture into the region with slight chances of showers starting Sunday afternoon persisting through Tuesday, mainly over south central Arizona. The best chance of showers will occur Monday over south central Arizona, and
isolated afternoon thunderstorms are possible as well.
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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