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.

April 14 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
A vigorous upper level low pressure system will drop southeastward out of the Pacific Northwest and move into northern Arizona on Friday and as it moves into the area strong and gusty northwest winds will develop. The strongest winds will focus over southeast California, along the lower Colorado River valley and over the southwest Arizona deserts. Winds from 25 to 40 mph will develop during the morning hours and by afternoon peak gusts could approach 50 mph. Areas of dense blowing dust will likely accompany the stronger winds, and visibilities could lower to 1 mile or lower at times, becoming a significant hazard to motorists. Much cooler high temperatures will also accompany this low pressure system, with readings expected to fall into the mid 70s to around 80 over the lower deserts

Strong gusty west winds today will turn north Friday as the trough digs south through Nevada and Arizona. Gusty north winds will continue through the day Friday, eventually spreading into portions of the Inland Empire on Saturday

We are on the precipice of a strong 3-day wind event. The winds in the mountains and high deserts were already gusting to 30-40 mph. They will increase through the day as the upper low over the Pacific Northwest moves Southeast toward the Great Basin. The high deserts will be the target area for strong winds today as westerly winds accelerate ahead of the upper low. The CANSAC-WRF shows the potential for surfacing mountain waves on the lee side of the Tehachapi mountains moving downstream across the high deserts through evening. Gusts of 50-60 mph are possible with blowing dust and sand restricting visibilities.
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