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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.

February 3 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
The tail end of a low pressure trough will move out of Southern California tonight, with some light showers. Fair but cool weather will prevail this weekend, but another trough will quickly move in from the west on Monday. This will bring a little more rainfall Monday and maybe Tuesday. A ridge of high pressure will build in behind the trough for the middle part of next week along with warming temperatures

Scattered light showers will continue through the evening. Rainfall will be very light, but the Friday afternoon commute could be wet in some spots. The snow level will be very high with little if any accumulation above 8000 feet. These showers are coming from a low pressure trough moving through the state, and Southern California is on the southern periphery of its moisture and energy. This trough will generate brisk, but not strong, winds in the mountains and deserts this afternoon and evening. This system moves out tonight and a dry weekend will follow. Not much high pressure builds in, but it will be a little warmer with more sunshine. The next low pressure trough moves into California Sunday and Monday. This one has more moisture with it and rainfall should be greater in Southern California Sunday night through Monday. Distribution will be similar to today`s storm, with much higher amounts north and lesser amounts south. Up to 1.5 inches in the San Bernardino Mountains, but generall a tenth to a half inch in the lowlands. This system also brings some strong winds to the mountains and deserts. It also carries very high snow levels and only a few inches could fall in the higher mountains above the highways. This wave zips through our region quickly according to some guidance; other guidance hangs on to moisture and showers Tuesday. A blend of the two has us carrying showers through Tuesday morning. All model guidance shows a more meaningful ridge of high pressure for Wednesday and Thursday that will bring fair and noticeably warmer weather.

Dry westerly flow aloft will continue over the region through next Tuesday, resulting in above normal afternoon temperatures, but with some high clouds at times. However, gusty west winds will likely develop over southeast California and Colorado River Valley Monday in response to a Pacific disturbance brushing by northern Arizona. A strong high pressure system will re-build over the region by the middle of next week, boosting afternoon temperatures into the low to mid 80s on the lower deserts
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