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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.

July 26 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
Mid level moisture in southeast flow aloft will bring a slight chance of showers and thunderstorms to eastern San Diego County this morning...and near the mountains this afternoon and early evening. Gradually warmer through Thursday or Friday...then slow cooling into early next week. A greater influx of monsoonal moisture will bring a slight chance of afternoon and early evening thunderstorms in the mountains and deserts for Friday through early next week

A small complex of thunderstorms over far southwestern Arizona and far southeastern California late Monday evening put out a weak outflow boundary to the southwest and west. That helped to initiate some weak shower development over the mountains of far northern Baja. Satellite imagery shows a band of mid level moisture extending from northwestern Baja across Imperial County...moving slowly to the West. Radar imagery shows a few...mostly light showers in this band of moisture with no lightning strikes since around 1 AM. There are small chances for light showers and an isolated thunderstorm over eastern and far southern San Diego County early this morning...but most likely not much beyond some increased mid level cloud cover over the southeastern third of San Diego County early this morning. There is also a slight chance of thunderstorms near the mountains this afternoon and early evening...through reduced surfacing heat due to mid level cloud cover could be a limiting factor for the San Diego County mountains.

Strong high pressure over the desert southwest is expected to keep monsoon thunderstorm activity to a minimum and many lower desert high temperatures at or above 110 degrees through Thursday, in spite of lingering moisture over the region. A return to strong easterly flow aloft as the high pressure weakens and shifts to the north will allow deeper moisture to move into the region from Friday onward into early next week, bringing cooler temperatures and a increase in thunderstorm activity, with locally heavy rain and gusty winds likely at some locations
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