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 27 2017
|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
|SAN DIEGO OFFICE - SYNOPSIS
Weak offshore flow will continue to bring mostly sunny, warm days and clear nights, except for areas of coastal clouds and fog. Onshore flow will bring slightly cooler weather next week with more coastal clouds. The pressure gradients are offshore this morning and will produce areas of northeast winds in the foothills and locally into the valleys through midday. We`re talking a few spots gusting into the 20-30 mph range. Through Friday we can see in the guidance a weak offshore gradient set up each night and morning, but winds will be light. The offshore flow will ensure the areas of coastal clouds/fog stay coastal, and the mostly sunny days will
continue to feel quite dry away from the coast. Somewhat higher pressure aloft will bring slightly warmer days, peaking out above average on Friday.
PHOENIX OFFICE - DISCUSSION
Moisture will seep into eastern portions of Arizona today and persist through Friday bringing isolated afternoon storms to the higher elevations of far eastern Arizona. High pressure will gradually build in through the work week with temperatures nearing the century mark for the lower deserts on Friday. Above normal temperatures will continue through at least the middle part of next week. Temperatures will gradually warm and approach the century mark in the lower deserts come Friday as H5 heights gradually recover from the exiting upper level low. The passing trough to our north on Sunday may bring subtle variations to our temperatures but nothing more than a few degrees. Highs near 100 look to persist through the middle of next week.
|Weather Story Phoenix Station
||Weather Story San Diego Station
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