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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.

June 21 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
Latest water vapor imagery shows a disorganized inverted trough across northern Sonora while the Monsoon high is positioned near the Four Corners. In response to the extreme heat and instability Monday afternoon, convection did develop across eastern Arizona during the early evening. Conditions were generally too dry for rainfall at the surface, however a few in-cloud lightning flashes were observed in the Phoenix area during the evening. Showers and thunderstorms continue at this hour across northern portions of the GOC and debris clouds are widespread, which is trapping outgoing infrared radiation, resulting in well-above normal overnight temperatures. Record high minimum of 89 degrees in Phoenix is in jeopardy of being broken

Very strong high pressure sprawling across the southern United States will bring unusually hot weather to the area with lower elevation locations reaching highs generally between 110 and 115 degrees. The above normal temperatures will persist through next week as high pressure becomes re-established across the desert southwest

High pressure aloft will gradually weaken today and Wednesday. As the onshore flow increases, the marine layer will slowly deepen this week and that will mean cooler weather west of the mountains. The weakening high and an increase in high clouds will also bring slightly cooler weather to the deserts today. The high pressure aloft will still be strong enough to bring warmer than average weather to the region through Saturday. Turn hot again early next week as the high rebuilds over the Southwes
Weather Story Phoenix Station Weather Story San Diego Station
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