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 6 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
Higher pressure aloft will bring warmer weather and less extensive coastal clouds for the rest of the week. The weather will be warmer and a little more humid Wednesday and Thursday as tropical air moves into the region from Mexico. Low pressure will return next week to bring cooler weather again.

Our low pressure trough over the west that gave us such a cool holiday weekend will begin to lift out today. That will start a warming trend and continue the suppression of the marine layer. Warmer days and clearer nights will result. An interesting if not very impactful feature of our weather on Wednesday will be a decaying tropical cyclone (currently known as hurricane Newton) moving north out of the Gulf of California into Arizona. The current forecast is to have it as a tropical depression as it crosses the border. Southeast California will get a boost in moisture, but the moisture nor the unstable air will be enough to create showers and thunderstorms this far west in our region. Should be pretty interesting in Arizona, however. The added humidity in the lower desert will dampen temperatures, but not the heat index, so it will be quite uncomfortable away from the air conditioners.

SYNOPSIS FROM THE PHOENIX OFFICE
Moisture will return to the region from the south today, returning clouds, humidities and storm chances to the south-central Arizona deserts by the evening. Expect increasing chances for showers and thunderstorms Wednesday into Thursday mainly over south central Arizona as deep tropical moisture from hurricane Newton moves into the area. Moisture will taper off from the west Thursday night as Newton moves out of the area, and will continue to slowly thin Friday into the weekend leaving only slight chances for afternoon and evening thunderstorms which will mostly focus over the higher terrain east of Phoenix

With all the clouds and showers expected, high temperatures Wednesday and Thursday will fall well below seasonal normals and into the low to mid 90s across the south central deserts. Would not be surprised if we see highs in the 80s especially on Wednesday
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