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 15 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
SOUTHEAST CALIFORNIA - San Diego and Phoenix NWS
IMPERIAL COUNTY
West to southwest winds will persist through tonight, Friday, September 15, 2017 here in Imperial County.

RIVERSIDE COUNTY
Wind in Blythe will have a more southerly direction with possible gusts 17 to 23 mph.

SAN DIEGO COUNTY
The San Diego mountains and deserts will see areas of west winds with strong surface wind gusts 28 to 34 mph this afternoon and evening. This will create moderately strong up and down drafts and low level wind shears.

SYNOPSIS FROM THE SAN DIEGO OFFICE
A trough of low pressure moving inland through the southwest states will maintain a deeper marine layer with patchy drizzle possible this morning. Low pressure will remain over the western states for the next week with cooler than average conditions. Gusty west winds in the mountains and deserts each late afternoon through late evening and areas of night and morning low clouds and patchy fog extending into the valleys and occasionally onto the coastal mountain slopes. Monday will be a little warmer as the low pressure weakens.


FROM THE PHOENIX OFFICE
Water vapor loop shows weak troughing over the Great Basin as deep layer southwesterly flow has developed across most of the Southwest resulting in drier air spreading eastward. The drier mid-September weather will more than likely remain through Thursday, September 20, 2017

Temperature will not be quite as hot as earlier in the week and should struggle to reach 100 degrees.
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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