This Friday morning is a bit cooler than the past few mornings, thanks to a cold front that moved through last night. Some overnight rain and clearing skies have helped, too.

Looking ahead, this weekend will be characterized by a cooler pattern. A low-pressure wave/circulation will maintain the cooler air, only allowing high temperatures to reach the upper 70s today through at least Sunday. Then by Monday, higher pressure will move into the region and cause temperatures to warm up again. As for winds, we'll remain mild compared to the past couple days, with some light afternoon breezes possible today and Saturday. Rain chances will be absent through the period.

Air quality-wise, the recent rain will help to limit PM10 (dust) levels. But, we'll have to watch PM2.5 (smoke) trends, as PM2.5 can rebound a bit quicker after rain. Highest PM2.5 levels would be expected in the mornings/evenings.

At least for now, all pollutants are forecast in the Good AQI category each day.

Check back again on Monday for the next Tucson Air Quality Forecast.

- M. Graves
ADEQ Meteorologist