National Weather Service United States Department of Commerce

Lingering Snow and Gusty Winds in the Southeast; Wet Weather Developing Across the Desert Southwest

A departing storm may continue to produce snow and gusty winds across portions of North Carolina through the morning commute on Friday. Later Friday and Saturday, a storm system is forecast to move into Southern California and the Desert Southwest with lower elevation rain and mountain snowfall. Flash flooding will be possible across portions of Arizona on Saturday. Read More >

Flood Return Period Calculator

Though this calculator is worded for the flood event return period it would work for any extreme weather event.

 

Enter the return period (ie..100 year flood)

Percent chance of occurrence

year flood %
Enter the number of years (ie..over the next 10 years)
There is a % chance that a year flood will occur over the next year(s)
year(s)