An unusual weather pattern for late June will be in store for Arizona. A large low-pressure wave will drop into the Northwest U.S from Alaska and take up residence over the West for the weekend and into early next week. The main effects this wave will have on Arizona's weather will be stronger winds and a slight cooldown. It's the winds that have our attention, though.

First of all, the winds will result in critical fire weather conditions this weekend. In others words, new and existing fires can grow rapidly and become very hard to control. If you are out and about, do all you can to prevent your sparks. Also, be aware of the winds if you are traveling on highways. More info HERE.

Air quality-wise, one good thing is that the winds will help to keep ozone levels low. Ozone is forecast in the Good AQI category each day. On the other hand, winds could result in dust, especially the next few afternoons (Friday-Sunday). So, if you're sensitive to dust, be aware of the air this weekend.

Lastly, elevated levels of PM10 (dust) and PM2.5 (smoke) will be possible in the mornings from local activity. And as typical, highest local PM10/PM2.5 levels are expected in industrial areas south/southwest of the Phoenix metro area.

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

- M. Graves
ADEQ Meteorologist