National Weather Service United States Department of Commerce

Excessive Heat Lingers in Southern Arizona; Critical Fire Weather; Tropical Depression Cristobal

Excessive heat will continue Friday across southern Arizona with triple digit high temperatures. Critical fire weather is forecast across large portions of the Desert Southwest Friday with low humidity and gusty winds. Tropical Depression Cristobal is forecast to re-emerge over the southern Gulf of Mexico Friday and move north into the north-central Gulf of Mexico this weekend. 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)