Tuesday, July 31, 2007

HGB Area


Maximum 1-hr Ozone (ppb)

Maximum 8-hr Ozone (ppb)


67 C617


Statistical Model

105 (72)


Human Forecast



Acutal (Observed)

106 C617


Model Forecast Updated on 7/31/2007 5:50:02 AM. Previous Forecast in Parenthesis.



The difference in two model forecasts stemmed from the change in GLS cloud. Believe cloud condition should be
in between. Satellite showed thin cloud over the region. High should still be around ship channel or a bit
north. Afternoon south wind is moderate so today's ozone is likely to be moderate.

Yesterday's ozone actually was low for most places except for NW belt 8 and ship channel where there were
brief sunshine between overcast.

7/31/2007 11:04:00 AM