The main weather story for this week will be a parade of two low-pressure waves that will pass through Arizona. Both systems will bring much needed rain and breezy conditions to southeastern Arizona. The cumulative effect of the waves will also result in high temperatures dropping to the low/mid-50s on Friday. A third wave will also bring some small rain chances on Friday.

As for the rain, the first two windows for rain will be 1) around midnight tonight and into the early hours of tomorrow morning and 2) Thursday afternoon/evening. After the second round of rain, total rainfall amounts through Thursday may reach up to 0.25" or more. Then on Friday, the aforementioned disturbance could add a little more to the week's rainfall totals.

Air quality-wise, this week's active weather will help to reduce PM10 (dust) and PM2.5 (smoke) from local activity. However, we can't rule out pockets of dust from winds today; we'll also have to watch PM2.5 levels over the weekend, which could be elevated from the colder overnight temperatures.

Overall, both PM10 and PM2.5 are forecast in the Good AQI category most days this week. Check back again tomorrow morning for the latest!

- M. Graves
ADEQ Meteorologist