Yuma Forecast
AQI Scale
Air Quality ISSUED ON: Wed. Sep 20, 2017
This report is updated Monday through Friday and is valid for areas within and bordering Yuma, Arizona
Today | Wednesday 9/20/2017
51
Ozone
MessageHealth Statement:Unusually sensitive people should consider reducing prolonged outdoor exertion.
Tomorrow | Thursday 9/21/2017
68
PM10
MessageHealth Statement:Unusually sensitive people should consider reducing prolonged outdoor exertion.
Notice:Blowing dust possible in the afternoon
Extended | Friday 9/22/2017
61
PM10
MessageHealth Statement:Unusually sensitive people should consider reducing prolonged outdoor exertion.
Notice:Blowing dust possible in the morning
Extended | Saturday 9/23/2017
44
Ozone
MessageHealth Statement:No health impacts are expected.
Extended | Sunday 9/24/2017
46
Ozone
MessageHealth Statement:No health impacts are expected.

Air Pollutant Breakdown
Pollutant Yesterday
9/19/2017
Wednesday
9/20/2017
Thursday
9/21/2017
Friday
9/22/2017
Saturday
9/23/2017
Sunday
9/24/2017
O3 54 51 40 43 44 46
PM10 23 31 68 61 42 32
O3 = Ozone, PM10 = Particles 10 microns and smaller

Synopsis & Discussion
Forecaster: -M. Pace
Yuma jumped into the low moderates yesterday for ozone, coming in with an AQI of 54. Today, with continued west-southwest flow and transport likely from southern California, ozone is forecast to reach into the low moderates once again this afternoon.

The attention is quickly taken away from ozone and moved to PM-10 heading into tomorrow and Friday. An area of low pressure will develop just north of the Great Basin, which will push an associated cold front and trough through the region. As the cold front moves through Thursday afternoon into early Friday morning, strong westerly winds will develop. Currently forecasting winds of 20-25mph with stronger gusts possible. During this time, blowing dust will be a threat, so have raised PM-10 values.

The trough and cold front will sweep eastward this weekend; however, small disturbances will rotate through the trough each day keeping winds slightly elevated for the entire forecast period.

The best news from all of this is the expected cooler weather. High temperatures are forecast to be in the 80's Friday through the weekend. Enjoy!

Useful Links
- Subcribe to the Forecast
- Yesterday's Monitor Data
- Year-to-Date Reports
- Read current issue of "Cracking the AQ Code"


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