Wednesday, May 09, 2007

Earliest Smog Advisory?

It may be semantics about alerts and watches, but the Ontario Ministry of the Environment issued a smog watch on February 3, 2005 [Ontario Ministry of the Environment, Smog Watches in Ontario [PDF]]:
On February 3, 2005, the Ontario Ministry of the Environment issued its first Winter Smog Watch, to remain in effect until February 6, 2005. An accumulation of particulate matter (PM2.5) due to unusual weather conditions has resulted in this Watch.

Smog alerts are never good, so while yesterday's is unfortunate, it's not the earliest.

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