National Weather Service United States Department of Commerce

Thunderstorms and Flooding Along the Gulf Coast; Winter Returns in the Central Rockies

A stalled front along the west-central Gulf Coast will contribute to a few severe thunderstorms and heavy rain with flooding over the next couple of days. Meanwhile, a vigorous system will produce heavy snow across the central Rockies into the High Plains the next few days. Finally, critical fire weather conditions are expected across the Four Corners region through Thursday. 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)