Search results
Results from the WOW.Com Content Network
Ten-year floods have a 10% chance of occurring in any given year (P e =0.10); 500-year have a 0.2% chance of occurring in any given year (P e =0.002); etc. The percent chance of an X-year flood occurring in a single year is 100/X. A similar analysis is commonly applied to coastal flooding or rainfall data.
For example, a 10-year flood has a 1/10 = 0.1 or 10% chance of being exceeded in any one year and a 50-year flood has a 0.02 or 2% chance of being exceeded in any one year. This does not mean that a 100-year flood will happen regularly every 100 years, or only once in 100 years. Despite the connotations of the name "return period".
The near 26 inches of rain at Fort Lauderdale-Hollywood International Airport was a 1-in-1,000-year storm. ... map of the preliminary rainfall ... year, which makes this a 1-in-500-year storm. ...
Quibdó, the capital of Chocó, receives the most rain in the world among cities with over 100,000 inhabitants: 9,000 millimetres (350 in) per year. [62] Storms in Chocó can drop 500 mm (19.7 in) of rainfall in a day. This amount is more than falls in many cities in a year's time.
The county is currently using 500-year flood maps to indicate areas where residents should be ready to evacuate. "We are using the 500-year flood plain maps as kind-of a guide.
A city on Florida's west coast was hit by a record-breaking 8 inches of rain in just three hours on ... 5 p.m. and 8 p.m. in Sarasota that it should only be expected every 500 to 1,000 years.
Average precipitation across the region show maxima along the coastal plain and along the mountains of the Appalachians. Between 28 inches (710 mm) and 62 inches (1,600 mm) of precipitation falls annually across the area. [60] Seasonally, there are slight changes to precipitation distribution through the year.
North Carolina bore the brunt of the storm. [60] Heavy precipitation fell in the eastern portion of the state, peaking at 24.06 in (611 mm) near Southport. [24] Numerous rivers experienced at least 500-year floods, causing extensive flooding.