Waterloo picked up 0.8 inches of precipitation on Sunday and 1.40 inches total for the month. So for this November, Waterloo received more than 50% of the monthly total of precipitation within one 24 hour period. How common is this situation? The featured chart presents the monthly frequency of having such an occurrence for Waterloo. About one in three years see this happen during November, so not uncommon at all. The climatologically wettest month of June has the lowest frequency as having a single intense rain event for month is very unlikely (other rain events are more likely to add up).

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