Yuma Forecast

Picture of a crop field up against a mountain in Yuma, AZ

Air Quality Hourly Forecast | Yuma

Click on each day to view forecast.

Tuesday Forecast:


Ozone

42 AQI
Max 8-hr Avg: 45 ppb

PM10

28 AQI
24-hr Avg: 30 µg/m3

Wednesday Forecast:


Ozone

33 AQI
Max 8-hr Avg: 36 ppb

PM10

8 AQI
24-hr Avg: 9 µg/m3

Thursday Forecast:


Ozone

37 AQI
Max 8-hr Avg: 40 ppb

PM10

12 AQI
24-hr Avg: 13 µg/m3

Friday Forecast:


Ozone

33 AQI
Max 8-hr Avg: 36 ppb

PM10

9 AQI
24-hr Avg: 10 µg/m3

Saturday Forecast:


Ozone

41 AQI
Max 8-hr Avg: 44 ppb

PM10

15 AQI
24-hr Avg: 16 µg/m3

Air Quality By Pollutant:

Pollutant
Tuesday
4/7/2020
Wednesday
4/8/2020
Thursday
4/9/2020
Friday
4/10/2020
Saturday
4/11/2020
O3
42
33
37
33
41
PM10
28
8
12
9
15
Pollutant
TUE
WED
THU
FRI
SAT
O3
42
33
37
33
41
PM10
28
8
12
9
15
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

Adjustments to the forecast are needed! A low pressure circulation is offshore near San Francisco at sunrise today. The eventual speed (or lack thereof) for that weather system through the Desert Southwest is the main element that is changing both the precipitation and air quality forecasts the rest of the workweek. There are now two windows for rainfall in Yuma, 1) tonight – Wednesday evening and 2) Thursday afternoon – Friday morning. The slow progression of atmospheric instability coupled with adequate moisture means multiple rounds of showers and thundershowers can keep adding to rainfall totals. Between 0.25 and 0.50 inches, with higher amounts are possible. Rain/thundershower movement would follow the counterclockwise rotation of the area of low pressure. Keep an eye out for flash flooding! The National Weather Service has issued a Flash Flood Watch for a broad area stretching from southern California to the southwest corner of Arizona, including Yuma. The effective times of the Flash Flood Watch is Tuesday afternoon – Wednesday afternoon, but please monitor the National Weather Service website for any updates.

When we are talking active weather with rain that usually means great air quality and that is exactly what is being forecasted. The one caveat would be locally gusty winds generated by a stronger thundershower crossing desert land that has not received rain yet. Because there is not an expectation for widespread and organized thunderstorm outflow winds, blowing dust is not a major factor in projected air quality at this time. The active weather this week should have a net benefit to the final daily AQI values.

More updates to come in Wednesday’s discussion!


- J. Malloy
ADEQ Meteorologist


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