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 30 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
The southern half of Southern California will see cloud cover while areas such as the Northern Inland Empire will see mostly sunny skies. Cloud cover should diminish tonight from N to S.

FRIDAY
The zonal flow (east to west) over the region and a weak semi-cutoff low over Northern Baja will gently be picked up by the southern jet on Friday. Temperatures will increase a few degrees through Friday as heights increase a bit and the cloud cover gradually dissipates.

SUNDAY AND MONDAY
A low originating in the Gulf of Alaska today will become an inside slider as it opens up into a trough and drops into the Great Basin through Sunday. This will bring a slight cool-down for Sunday and Monday. This will also bring a period of gusty onshore winds Sunday and Monday through the mountain passes and desert slopes.

SYNOPSIS FROM THE PHOENIX OFFICE
Weak low pressure will slowly move south of the region through Friday bringing continued cloudy skies and maybe some sprinkles. Drier air this weekend will lead to mostly clear skies while temperatures remain above seasonal normal. Another low-pressure system will likely affect the region early next week resulting in a bit cooler temperatures, but dry conditions should persist.
Weather Story Phoenix Station Weather Story San Diego Station
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