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.

May 3 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
BRIEF DISCUSSION FROM THE PHOENIX OFFICE
Not much change for the forecast this morning. Current 24-hour temperature trends are a little behind forecast values. Have nudged high temperatures down just a little bit based on those trends and latest bias-corrected numerical guidance. Otherwise we will continue to focus on the incoming storm system currently taking shape West of California. It is exhibiting convective instability in the center of the low looks like it'll be the strong and dynamic system we've anticipated for several days now.

SYNOPSIS FROM THE PHOENIX OFFICE
Temperatures will quickly warm today and peak Wednesday under high pressure. Some lower deserts will approach triple digits. The heat will not last long as another storm system rolls in from the Pacific. Winds will increase Wednesday and be strongest Thursday leading to areas of blowing dust. Friday into the weekend will feature below normal temperatures various cloud cover and modest chances for rain.

BRIEF DISCUSSION FROM THE SAN DIEGO OFFICE
Areas of stratus and fog occurred near the coast as the marine layer depth had lowered to around 1100-1200 feet MSL. The immediate coast of San Diego County remained cloudy at 9 am…but most other areas had cleared. Today should be the warmest day of the week as the profile is warmer mostly by 2-4 deg C between 500 and 950 MB. The influence of the upper low currently near 33N/133W is not yet upon us. The lower deserts should have mid to upper 90s mb. The influence of the upper low currently near 33N/133W is not yet upon us. The lower deserts should have mid to upper 90s with a few temps near 90 in the warmest part of the inland empire. The only exception would be the immediate coast as the marine layer is developing though with the marine inversion only about 6 deg C strong coastal area should still clear later today.

SYNOPSIS FROM THE SAN DIEGO OFFICE
Except for mild conditions and some clouds along the coast sunny except for mild conditions and some clouds along the coast sunny and warm weather will prevail today under high pressure. A low pressure system will slowly approach from the West and result in cooling and more clouds Wednesday with precipitation possible Thursday through the weekend. A few thunderstorms could occur especially Friday when the system is overhead. It will be cool Thursday through the weekend then fair weather with a warming trend will occur early next week.
Weather Story Phoenix Station Weather Story San Diego Station
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