Phoenix, Arizona Air Quality Data





Current Air Quality for Phoenix, Arizona
Air Quality Index (AQI)
Observed At Time -  3:00 MST     
 
GOOD Good
 
Health Message: None
AQI - Pollutant Details


0-50 Good
51-100 Moderate
101-150 Unhealthy for Sensitive Groups
151-200 Unhealthy
201-300 Very Unhealthy
301-500 Hazardous





Air Quality Forecast for Phoenix, Arizona
Today's High Tomorrow's High
Air Quality Index (AQI)
Good
Health Message: None
Air Quality Index (AQI)
Good
Health Message: None
AQI - Pollutant Details
Today's High Tomorrow's High
Ozone No Data
Particles (PM10) No Data
Particles (PM2.5) No Data
Ozone No Data
Particles (PM10) No Data
Particles (PM2.5) No Data
Forecast Discussion
Forecast Discussion: [View the ADEQ Hourly Forecast for Phoenix]
Great weather and air quality on Tuesday. The only monitors reaching the Moderate AQI cutoff (and it was right at the cutoff) were Pinnacle Peak and Tonto National Monument for ozone. There is more in the way of fair weather and good air quality expected today! The exception, for the short term, is the West 43rd monitor for PM10 readings. Localized concentrations are spiking in that vicinity early this morning.

Alright, time to step back and take in the weather pattern and what is to come. Right now stronger southwesterly flow is developing over the Desert Southwest region in response to an approaching Pacific trough of low pressure. It doesn't take long to get above the ground (5,000 feet or so) before these winds become apparent. Peak winds for the week enter the Valley Thursday. Gusts 20 to 30 mph are possible. The fetch and orientation of winds crosses over lands in southern Maricopa, western Pinal, and western Pima Counties. Generous rainfall has fallen in that part of the state. Blowing dust should be minimal. For ozone, clearing winds start to increase today and now could last into Friday as the Pacific trough stays close enough in proximity to Arizona to tighten the pressure gradient necessary for faster winds. No rain is expected during this stretch.

Saturday is a hiatus for winds as we find ourselves between major weather systems, but then things may get compelling to start next week. Not only for winds, rain as well. There are a lot of moving parts to an ideal pattern for heavy rain. In this instance, dynamics associated with a potent low pressure trough in the form of atmospheric lift with steeper lapse rates (change in temperature with height) has potential to interact for multiple days with deep tropical moisture moving northward up from the Baja. That is a recipe for excessive rainfall!

There is uncertainty, however, on whether these two features (Pacific trough and tropical moisture) connect to bring a period of significant rain for the mountains and lower deserts of Arizona. The uncertainty (and it is high) arises both from the speed of the Pacific trough into Arizona and the eventual track of multiple tropical systems currently offshore Mexico (e.g., Tropical Storms Kiko, Lorena, and Mario at the moment).

More discussion to come as we get closer to the weekend!


J. Malloy
http://azdeq.gov/phoenix/forecast
Last Update: Wednesday, September 18, 2019, 9:13 AM





Current Hourly Air Quality Index Map
AQI: Good AQI: Moderate AQI: Unhealthy for Sensitive Groups AQI: Unhealthy AQI: Very Unhealthy AQI: Hazardous


Today's Air Quality Forecast
AQI: Good AQI: Moderate AQI: Unhealthy for Sensitive Groups AQI: Unhealthy AQI: Very Unhealthy AQI: Hazardous


Today's Air Quality Timed Animation
AQI: Good AQI: Moderate AQI: Unhealthy for Sensitive Groups AQI: Unhealthy AQI: Very Unhealthy AQI: Hazardous


Script courtesy of  Michael Holden of Relay Weather. Data courtesy of Airnow.gov