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.
| November 17 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
West winds 28mph with local gusts 40mph near and below passes, resulting in moderate up/downdrafts and low level wind shear over the desert slopes through Saturday.
DISCUSSION FROM THE SAN DIEGO OFFICE - TODAY THROUGH SUNDAY
A plume of moisture associated with a low pressure trough is moving through California this morning. The thick middle and high clouds are producing showers in L.A., Orange and San Bernardino Counties, but are particularly challenged by the dry air below 9,000 feet that seems to be evaporating most raindrops.
Today appears to be the coolest day in the coming week with temperatures close to seasonal averages. The front associated with this low pressure system will drag colder air into the interior West tonight and set up an offshore pressure gradient.
It will be enough to produce local northeast winds Saturday morning with top gust 25 to 35 mph below canyons and passes into the Inland Empire and also in the Santa Ana Mountains.
Winds diminish Saturday, but dry air continues to trickle into the coastal basin for Sunday. Skies will be mostly clear Saturday, but some high clouds return for Sunday through Tuesday.
DISCUSSION FROM THE PHOENIX OFFICE
A weak weather system passing by well to the north will bring increased winds today with some gusts into the teens this afternoon at most terminals, especially for Imperial County Airport (KIPL) and the Blythe Airport (KBLH).
Scattered to broken mid and high clouds will persist through the evening with clearing eventually moving through the region early Saturday.
Fairly typical diural trends are expected through this afternoon, but increased synoptic winds may lead to more a north or northeasterly wind direction late tonight into Saturday
EXPECTED WARM WEATHER FOR THANKSGIVING WEEK
|Weather Story Phoenix Station
||Weather Story San Diego Station
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