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 14 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
SYNOPSIS FROM THE SAN DIEGO OFFICE
A trough of low pressure will bring unseasonably cool weather through Friday along with patchy morning drizzle or light showers on mainly the coastal mountain slopes and foothills. Moderately windy conditions will occur in the mountains and deserts. Strong onshore gradients from the coast to the deserts and a marine inversion in the 4500-6500ft MSL range will result in locally gusty winds through San Gorgonio Pass and the desert mountain/foothill slopes the rest of Thursday afternoon and tonight. Slight warming will occur over the weekend into Monday as the trough weakens a bit, but more cool weather is likely by the middle of next week as the trough deepens and expands again.
FROM THE PHOENIX OFFICE
Locally, gusty winds will continue across Imperial County Friday before beginning to subside on Saturday. Before that happens some areas may experience gusts up to 40 mph on Thursday night. The winds are due to a cold front moving through the area. A cold front will continue to sweep through the area tonight resulting in much cooler autumn like temperatures this weekend. Lower elevation afternoon highs only in the 90s and lows in the 70s will continue through much of next week. The forecast for next week remains tricky as models are quite dispersive on tracking the remnant moisture from Tropical Storm Norma through northwest Mexico in towards the SW Conus. Deeper moisture may return to the southeastern third of AZ as early as Sunday before largely drying out later in the week
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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