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.

May 9 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 PHOENIX OFFICE
High pressure and dry conditions build into the region this week for a gradual but significant warming trend. Many lower desert locations will reach the 100 degree mark during the latter half of the week. Some cooling is anticipated during the weekend though temperatures will remain above normal through at least Sunday.

SYNOPSIS FROM THE SAN DIEGO OFFICE
High pressure aloft near the West coast will strengthen bringing inland warming and a shallower marine layer through Thursday. Cooler into the weekend as a low pressure trough moves inland across the State. The trough will be accompanied by Gusty winds over the mountains and deserts and a deeper marine layer. Areas of night and morning coastal low clouds and fog will continue through the week.

The 12z Miramar sounding had a weak inversion based near 4350ft MSL. Onshore SFC pressure gradients were holding steady at 3-4 mbs KSAN to the deserts. At 8am PDT winds were mostly light except through and below the wind-prone passes.

Satellite imagery at 8 am PDT showed lower cu/stratocu developing inland. Given the continued deep moist layer again today this is not surprising. However with the added stability in the lower atmospheric profile indicated on the Miramar sounding there is a good chance the clouds will not be as extensive and persistent as yesterday. So with a bit more sun afternoon temperatures should top out a few degrees higher then yesterday especially inland.
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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