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| Air Quality Index (AQI) |
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Good |
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Health Message: None |
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Data Not Available |
| Particles (PM10) |
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Good |
| Particles (PM2.5) |
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Good |
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Data Not Available |
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Forecast Discussion: An energetic low-pressure trough situated over the Desert Southwest is providing widespread dispersion and mixing. Perhaps too much for southern California. Long-range transported dust from that region has entered central Arizona this morning in front of an advancing cold front. Air parcel trajectories are keeping this area of lofted dust north of Nogales. Specifically for Nogales, a benefit with the current weather pattern setup is a lack of strong surface inversions to trap pollutants. This means a continuation of Good AQ for Nogales today. An eventual cooler and more stable atmosphere does create early day inversions Saturday and Sunday. Sunday has the strongest projected inversion and therefore has the highest forecasted particulate values of the forecast period, albeit remaining in the Good range. Interesting weather pattern forms up late Sunday/Monday. What is called a backdoor cold front enters New Mexico. At the same time a low-pressure circulation develops over northern Mexico. Very windy easterly winds 30+ mph are likely in southern Arizona and scattered thunderstorms could break out as well. These winds would blow from the lower deserts of New Mexico. A morning haze could result on Monday. We will evaluate the latest data on Sunday to hone in the forecasted AQ. Stay tuned. Check back on Sunday for a look ahead at next week's weather and air quality. Until then, have a great weekend! –J.Malloy Last Update: Friday, September 23, 2016, 9:29 AM |
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National Parks/Monuments
Tribal Boundaries
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