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.

October 18 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 OFFICESYNOPSIS FROM THE SAN DIEGO OFFICE
Fair and a little warmer today as high pressure aloft begins to build. Offshore flow will develop tonight and continue through Friday with hot, dry weather and gusty northeast winds at times. Continued very warm Saturday followed by cooling Sunday and Monday as trough of low pressure approaches the West Coast.

Surface high pressure is building into northern California this morning and a moderately strong north-south gradient (SFO-SAN -7.0) is already in place. Tonight a 1028 mb surface high will build over northern Nevada setting up even stronger gradients through Wednesday morning that will support moderately strong northnortheast winds across SoCal. Models have been consistent with the strength of the winds with this Santa Ana event with 20 to 30 mph winds gusting to 40 to 50 mph in the wind prone mountain and foothill areas. A small diurnal decrease in winds Wednesday evening will increase again late Wednesday night through Thursday morning.

Temperatures will rise and humidity will plummet Wednesday with max temps in the 90s in most coastal and valley locations. The hot spots Wednesday will probably be in Orange County where downslope warming will extend to the coast. Thursday will be a hotter day in the
valleys with the center of the 591 dm high overhead.
SYNOPSIS FROM THE PHOENIX OFFICE
Dry weather with mostly clear skies will continue across the Desert Southwest through the weekend. Temperatures will remain above average, however locally breezy conditions will develop Wednesday in the wake of a weak low pressure system passing by to our north. A turn towards more unsettled weather is possible early next week as low pressure approaches from the west.
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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