Tucson Area Forecast
AQI Scale
Air Quality ISSUED ON: Fri. Nov 24, 2017
This report is updated Monday through Friday and is valid for areas within and bordering Tucson, Arizona
Today | Friday 11/24/2017
53
PM10
MessageHealth Statement:Unusually sensitive people should consider reducing prolonged outdoor exertion.
Tomorrow | Saturday 11/25/2017
46
PM10
MessageHealth Statement:No health impacts are expected.
Extended | Sunday 11/26/2017
48
PM10
MessageHealth Statement:No health impacts are expected.
Extended | Monday 11/27/2017
51
PM10
MessageHealth Statement:Unusually sensitive people should consider reducing prolonged outdoor exertion.
Extended | Tuesday 11/28/2017
56
PM10
MessageHealth Statement:Unusually sensitive people should consider reducing prolonged outdoor exertion.

Air Pollutant Breakdown
Pollutant Yesterday
11/23/2017
Friday
11/24/2017
Saturday
11/25/2017
Sunday
11/26/2017
Monday
11/27/2017
Tuesday
11/28/2017
O3 40 41 43 42 37 41
PM10 48 53 46 48 51 56
O3 = Ozone, PM10 = Particles 10 microns and smaller

Synopsis & Discussion
Forecaster: -M. Graves
Temperatures will continue to be unseasonably warm this weekend as a ridge of high pressure builds over the region. High temperatures will remain at least in the upper-mid 80s today through Sunday, with Sunday forecast to be the warmest day. Tucson may see 90°F reached again (the normal high is around 70°F!). Light winds are also expected through the weekend.

By Monday, the weather begins to change as a trough of low pressure passes over Arizona. Though Monday is still forecast to be a warm day (highs in the upper 80s), winds are currently forecast to be 15-20 mph and out of the southwest in the afternoon. Then, as Tuesday rolls around, high temperatures are expected to plummet to around normal, or slightly below.

Air quality-wise, PM-10 will continue to have the potential to reach the Moderate Air Quality Index (AQI) category on weekdays, particularly with the Rillito and Geronimo monitors in mind. It will be interesting to see what happens on Monday, though--it's possible that the stronger winds could help to limit dust accumulation from stagnation. Over the weekend, PM-10 activity should decrease. Ozone is forecast to remain in the Good AQI category.

Check back on Monday for the next Tucson air quality forecast.
Useful Links
- Pima County Department of Environmental Quality
- Subcribe to the Forecast
- Yesterday's Monitor Data
- Read current issue of "Cracking the AQ Code"


Main Office
1110 W.Washington Street
Phoenix, AZ 85007
P: 602.771.2300
azdeq.gov