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.

April 19 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
Clear skies greet many this AM with thin high level clouds beginning to intrude from the West. Clouds won't be thick enough to impact temperatures today as we return to above normal readings with low 90s for many of the lower desert elevations. Ridging albeit somewhat pinched and not the traditional visual representation of it is building into the area with 500mb height rises on the order of 20 to 40 decameters observed this morning compared to last. Subtle warming through the atmospheric column also sampled in spite of the back-door cold front like gradients still stacked along this rim. Large stalled upper low continues to circulate over Colorado this AM and will begin to slowly clear further to the east allowing for the upper ridge line to transition towards the CO river valley and 500mb heights across the SoCal and Az to bump into the 575-579DM range. Short-term forecast grids in great shape only minor updates needed to trend hourlies toward observations from this morning.

High pressure will dominate along the West Coast through the middle of the week. This will keep conditions on the warmer side, especially inland. However by the end of the week a storm system will approach the region, resulting in a chance for precipitation late Friday into early Saturday. Temperatures will also cool for the weekend, with daily highs returning to near average values.
Weather Story Phoenix Station Weather Story San Diego Station
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