The upper level low that has been spinning over eastern Ontario and the Great Lakes will continue for at least one more day. Very heavy rain will once again develop in the tropical air mass from south to north, and produce torrential downpours. Last night more than 40mm fell in many region in a very short period of time, filling drainage ditches, allowing creeks to rise, and flooding some roads. 38.3mm was the official in Kemptville, I had slightly less at 33mm. Whatever the amount, it is falling on already saturated soil as the very wet summer moves along. Any more rain today will only add to the flood potential. Any flooding will be minor in nature, but the risk is present.
A Flood Watch remains posted for northern New York and Vermont. Heavy Rain Warnings are in effect in southern Quebec, excluding Montreal, for 50-70mm addtional rainfall today. That could push this weeks totals to well over 100mm.
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