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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.

January 6 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
A very active pattern will continue over the eastern Pacific. However, the primary storm track will remain over northern and central California. This puts Southern California on the tail end of the moisture with primarily light rainfall amounts expected on Saturday, Monday and again on Wednesday. Otherwise, expect warming through Sunday as high pressure aloft builds, with increasing high clouds Saturday and Sunday. Cooler early next week with below normal temperatures continuing through the end of the week

On Saturday, an atmospheric river of moisture develops and takes aim at Central and Northern California, but initially some wisps of moisture on the very southern periphery of the moisture plume will likely move into Southern California, with around 1 inch of precipitable water moving into areas north of San Diego county. As a result, some light showers are possible on Saturday, mainly north of San Diego county, with models showing 0.05-0.15 inch and local 0.50 inch amounts in the mountains possible. Snow levels will be high, above 9500 feet. Otherwise, although high clouds will increase Saturday across the region, the ridge building a little further into the area will likely bring a little further warming for Saturday.

The upper ridge peaks in strength on Sunday, nudging any moisture far to the north and leaving Southern California high and dry. Highs will increase to a few to several degrees above normal, although high clouds will continue to create partly to mostly cloudy skies over Southern California.

The ridge will break down as a trough moves inland over the West on Monday, with the trough dragging a dying plume of moisture through Southern California. This will likely create widespread light showers across the region, with highest rain amounts north of San Diego county

Moist Pacific flow will allow periods of thicker high clouds to stream across the Southwest through at least the beginning of next week. Any light showers will primarily be relegated to higher terrain locations this morning, then again on Monday. Otherwise, somewhat cooler temperatures will moderate into the weekend and hover in a slightly above average range for most of next week
Weather Story Phoenix Station Weather Story San Diego Station
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