Friday, July 20, 2007

HGB Area


Maximum 1-hr Ozone (ppb)

Maximum 8-hr Ozone (ppb)


47 C78


Statistical Model



Human Forecast



Acutal (Observed)

52 C553




Another low ozone day with shower across the region. Weak to moderate southeastly most of the day. Again, the
actual ozone depends on how cloud is moving.

Yesterday's high of 64 ppb at Aldine is a bit surprising given the rain and mostly overcast skies. The time
of peak is 16 CST, or 3 pm local time. Satellite showed overcast skies over the region at 15-16 CST. So the
uptick in ozone is unlikely the local production. It is likely the east wind carried the ozone from Beaumont
direction. More study needed to be done to confirm it. If true, this is a rare case that ozone is transported
to Houston.

7/20/2007 11:55:09 AM