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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 26 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
At 8 AM this morning one final vort lobe could be seen rotating around the back side of the main upper low and moving well East of Phoenix and into Western New Mexico. Dry and subsident Northwest flow aloft was overspreading the lower AZ deserts and IR imagery showed sunny skies across all of the lower desert with just a bit of lingering mid level cloud pushing East across SRN Gila County. With the low esiting off the our East pressure gradients have been relaxing and we expect only breezy conditions at best over the area today nothing like the wind seen yesterday. For the rest of today we expect sunny skies and cooler than normal high temperatures with a high of 80 degrees in Phoenix.

The next couple days will yield more tranquil weather across the region however another area of low pressure will dip into the area Thursday with more breezy conditions and an outside chance of showers and thunderstorms over higher terrain North and East of Phoenix. More seasonably warm weather will return during the weekend and early next week with a final weather disturbance skirting through the area with less fanfare than its predecessors.

Short term (today through Thursday night) dry and a little warmer through early Wednesday under weak high pressure. For late Wednesday through Thursday a low pressure system will move Southward through the Great Basin and California bringing cooling strong gusty west winds in the mountains and deserts and a chance of showers with a slight chance of afternoon and early evening thunderstorms. The track of this system is a little farther West than the system that moved through Southern California Monday and should be a little less moisture starved. 500MB temperatures fall to around -20 degrees C for late Wednesday across the Northern half of Southern California and are a little colder across most of Southern California on Thursday afternoon with the most favorable times for thunder each day during the afternoon and early evening. Stronger West winds in the mountains and deserts are expected for Wednesday afternoon into Thursday with support for the winds strongest on Wednesday night. Once again the core of the strongest winds is expected across San Diego County with winds a little less farther north. Winds are currently expected to be a little less than for Monday and peak mostly at advisory thresholds.

Dry and a little warmer today with weaker winds. For Wednesday afternoon into Thursday evening a low pressure system from the Northwest will bring cooling strong gusty west winds in the mountains and deserts and a chance of showers and a slight chance of thunderstorms. High pressure aloft over the Eastern Pacific will then strengthen bringing dry weather and a warming trend for Friday through Monday. There are small chances a low pressure system moving Southward through the Great Basin on Saturday night and Sunday could end up far enough West to bring a few showers to the mountains.
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