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.

August 15 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
SYNOPSIS FROM THE SAN DIEGO OFFICE
Today will be another hot day for inland areas, with temperatures running 6 to 12 degrees Fahrenheit above seasonal averages. A gradual cooling trend will begin Tuesday, with daily high temperatures reaching near to slightly below seasonal averages by Friday. A shallow marine layer will continue to bring patchy low clouds and fog to the coastal areas during the nights and mornings. Monsoonal moisture could return for Thursday through Sunday, but widespread thunderstorm activity is not expected

SYNOPSIS FROM THE PHOENIX OFFICE
The weather pattern will allow for a transition to drier and more quiet conditions through early this week as moisture levels continue to trend downward. With this drying trend, temperatures will also increase with readings of a few degrees above normal. A return of modest monsoon moisture looks likely for the latter half of the week resulting in slight chances for showers and thunderstorms across southeast California and all of southern Arizona

Over the next couple of days, progs call for the light northeast steering flow to shift more out of the northwest over the lower deserts as troffing continues to become established over central California. Moisture remains suppressed over the deserts, with PWAT values a bit over one inch over the south central AZ deserts and below 0.75 inches over portions of eastern Riverside county. 850mb dewpoints are not overly high, running 8-10C many places. Given the unfavorable steering flow, no real forcing aloft and only modest moisture/instability, chances for storms remains below 10 percent except for the higher terrain areas to the east of Phoenix. High temperatures over the western deserts remain elevated due to drier conditions with many locales over 110 and the Imperial Valley reaching to around 115. South central AZ will stay a few degrees above seasonal normals through Tuesday.
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