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.

December 14 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
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...

...Update - Flash Flood Watch and High Wind Watch Issued...

Have issued a Flash Flood Watch for the San Bernardino County Mountains where the focus of heavy rain looks to be with strong upslope winds focused there. 2-5 inches with local maxima to 5"+ possible there. We are forecasting 1-2" across the rest of the SoCal mountains with localized 3" possible, especially San Jacinto and Palomar.

Winds really strenghten Thu night-Friday. Have issued a High Wind Watch for the mountain tops to the desert floor for this timeframe. Gusts to 75 mph possible at the mountain ridge tops and localized gusts to around 60 mph are possible at the desert floor as mountain waves potentially surface.

SYNOPSIS FROM THE SAN DIEGO OFFICE
A Pacific storm will move across Southern California Thursday night through Friday, bringing widespread rain and strong winds to the mountains and deserts. Cool but dry weather will arrive behind the storm this weekend. Cool weather will continue early next week with potentially gusty offshore winds developing.

SYNOPSIS FROM THE PHOENIX OFFICE
Dry weather with unseasonably warm temperatures will continue through Thursday, with varying amounts of high clouds. A change toward unsettled, wetter and colder weather will occur Friday and Saturday. Clearing skies with slightly below normal temperatures will settle over the region from Sunday into at least the early part of next week, with many desert locations falling into the low to mid 30s during the morning hours
Weather Story Phoenix Station Weather Story San Diego Station
Image for Phoenix Station Weather Story Image for San Diego Station Weather Story

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