Sunday 31 August 2014

Will skies be clear Sunday night over southern Ontario?

It looks like skies will become mostly clear by sunset over most of southern Ontario, with low clouds dissipating soon after sunset, as a weak high pressure ridge builds over the central Great Lakes region following a low pressure trough moving eastward from eastern Ontario.
Dewpoint temperatures remain high, and so later in the evening, as temperature drops, dew and mist are likely to form, primarily in lower-lying areas where winds become calm, but any optical surfaces exposed to the clear night sky will become dew-covered early in the evening in most regions.



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