Intense Flash Flooding has impacted the eastern United States this week. A truly epic amount of rain fell in Islip, New York on Wednesday with a 24 hour total of 13.57 inches likely breaking the state's all time precipitation record. The featured chart displays the one minute interval precipitation data for the ASOS site. The instantaneous rainfall rates were sustained at over four inches an hour for two hours! The IEM has documented other heavy rainfall events over the past years from the ASOS sensors and this event is remarkable because the instantaneous rates were so consistent. Other events typically had very short duration intensities over 10 inches per hour. The "generate this chart" button provides the raw data for this chart.

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Tags:   heavyrain