Warm and dry conditions will continue through Tuesday. Breezy to windy conditions at times can be expected today through Monday.

Yesterday, peak 8 hour average Ozone reached the upper Moderate category aided by light winds. Today, improvement is expected with much better ventilation yielding conditions in the upper Good category. Some additional improvement is expected over the weekend with continued excellent ventilation and a typical weekend decline in combustion activities (tailpipe, industrial). An uptrend begins Monday with the usual weekday increase in combustion activities but lingering breeziness is anticipated to keep conditions just shy of the Moderate category. On Tuesday, lighter winds are expected to enable conditions to climb well into the Moderate category.

Daily average PM10 (dust) has been trending upward as soils have been drying out. That will continue today with a short lived rise in hourly readings due in part to construction related activities starting up before before the inversion breaks and better ventilation begins. But, the daily average is expected to remain just within the Good category. Daily averages are expected to remain in the Good range the next several days with enhanced ventilation.

Daily average PM2.5 is expected to remain in the Good category aided by good to excellent ventilation.

- A. Jamison
ADEQ Meteorologist