[ADEQ Forecasts] ADEQ AIR QUALITY FORECAST FOR SATURDAY, SEPTEMBER 6, 2008

[forecasts@lists.azdeq.gov]

http://www.azdeq.gov/ensemble.pdf

For transportation alternatives:
http://www.valleymetro.org

Health message for Friday, September 5: Unusually Sensitive People
should consider limiting prolonged exertion outdoors.

Health message for Saturday, September 6: Unusually Sensitive People
should consider limiting prolonged exertion outdoors.

Synopsis and Discussion

*An Ozone Health Watch remains in effect for Friday, September 5, 2008*

There's not much change expected in the weather the next several days.
It will be a gorgeous weekend with sunny skies, light winds and no rain.
With afternoon desert temperatures topping out at 108 on Saturday and
107 on Sunday, it should be a great weekend to spend by the pool if you
can. Again, models are bringing some moisture back to the region by
early next week, dropping those temperatures a bit. I don't think we
will see any rain next week as a result of the moisture, but that could
change.
Air quality-wise, Ozone has been steadily increasing the past several
day across the forecast area, prompting two days in a row of Health
Watches. We still haven't seen nearly as high of concentrations as the
NOAA model has been suggesting. As mentioned yesterday, there's not
doubt that ozone and precursors are being imported into Arizona from
southern California as evident by the Yuma increase yesterday. We're
just not seeing enough to warrant a High Pollution Advisory. Thus, we
will allow the Ozone Health Watch to expire at the end of the day on
Friday with no extension or further health statements at this time.
Particulates still remain mostly in the "Good" range with the occasional
isolated one-hour spike that skews the daily average for one or two of
the sites. Everything will be revisited on Sunday. Until then, have a
great weekend! -J.Paul

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