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.

July 15 2017
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
Warmer weather inland for this weekend, along with a return of chances for afternoon showers and thunderstorms in the mountains and deserts. Night/morning low clouds and fog will be restricted to coastal areas for the weekend as the marine layer becomes shallower under strengthening high pressure aloft. Drier and more seasonal weather is expected by the end of next week. This will correlate to surface high temperatures in the mid 80s-mid 90s in the inland valleys, mid to upper 80s for higher elevations of the mountains, low to upper 90s for the lower elevations of the mountains, mid 90s to low 100s in the Inland Empire, 101-108 in the High Desert, 106-112 in the San Diego County Deserts, and 105-114 in the Coachella Valley. A shallow marine layer will moderate the temperatures along the coast, with temperatures in the mid 70s expected at the beaches. The hottest day on Saturday will only be around 5 degrees above seasonal normals for inland areas. While conditions will be hot in some areas, most areas are not expected to meet critical thresholds. High temperatures will slowly lower each day Sunday through the middle of next week. The ridge shifting to the north will help advect monsoonal moisture across the region this weekend into early next week. The amount of moisture is marginal today for thunderstorm chances over the mountains, but looks better for Saturday, and then Sunday and Monday for both the mountains and deserts. Gusty, erratic winds and lightning will be the primary threats with any storms that form today (Friday) and Saturday, and isolated flash flooding could become a factor Sunday and Monday as more moisture gets advected into the region.
SYNOPSIS FROM THE PHOENIX OFFICE
Temperatures will remain near average through the weekend as high pressure sits over the Great Basin. Thunderstorms will be common over higher terrain areas and more scattered at lower elevations of
central Arizona. Areas of blowing dust and gusty winds will likely accompany any thunderstorms. Moisture levels will gradually increase over weekend which could lead to an increase in thunderstorm
coverage into the beginning of next week.
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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