Extreme Precipitation Estimates, 2008
Data for how much rainfall constitutes a 100-year storm event in New England and New York was recalculated for the first time in 50 years by the Northeast Regional Climate Center in 2008. (A 100-year storm is one that has a 1 percent chance of occuring in a given year.) In Connecticut, it showed rainfall levels had increased so much that what had been considered a 100-year event was now a 50-year event. It also raised concerns about whether drainage systems could handle the additional water. The maps below show updated calculations of how much rainfall would occur in a 100-year storm event for a 24-hour period.