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.

November 13 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 - TODAY THROUGH WEDNESDAY
A low pressure system will be centered over the eastern Pacific off the coast of British Columbia and the Pacific Northwest with broad high pressure over northern Mexico. That high pressure to the south and weaker onshore flow will bring slow inland warming into Tuesday and Wednesday with high temperatures warming to around 10 degrees above average for inland areas and a few degrees above average near the coast. Southwest flow aloft will continue the flow of mid and high level subtropical moisture across the area with periods of mid and high clouds.

THURSDAY THROUGH SUNDAY
A low pressure system will move inland along the West Coast Thursday into Friday bringing stronger onshore flow. Models indicate that this will bring cooling for Thursday and Friday with high temperatures falling to near average on Friday. Stronger onshore flow will bring periods of gusty southwest to west winds in the mountains and deserts for Thursday into Friday.

DISCUSSION FROM THE PHOENIX OFFICE
High clouds continue to stream over the Desert Southwest this morning as a fetch of upper level moisture rides the westerlies over Arizona. To our south, high pressure remains over Mexico while a trough digs into the Pacific Northwest. Models indicate warmer air associated with this high pressure will expand into our area today pushing up surface temperatures by a degree or two. However, thick high clouds will persist throughout the day and will certainly limit the amount of warming that we could otherwise see.
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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