It is not known how often a tornado like the Tri-state tornado might occur. Some scientists estimate that it may have been at least a 1000 year storm.
A 100-year storm refers to a weather event that has a 1% chance of occurring in any given year based on historical data. It does not mean that the event will occur only once every 100 years. The term is used by engineers and planners to design structures to withstand extreme weather conditions.
The probability of a tornado hitting Kansas is 100%. Dozens of tornadoes occur in Kansas every year.
also called the "100 year storm"
A tornado's central pressure is lower than the surroundings. In a strong tornado it may be 50 to 100 millibars lower. The actual pressure will, of course, depend on what the pressure of the surroundings are, which can vary with elevation and the tornado's parent storm system.
'100 year storm'; large scale destruction offshore shipping + coastal installations from Nova Scotia to Florida
Essentially 100% Iowa gets at least a few tornadoes every year.
It is nearly 100%. Canada gets 100 tornadoes each year on average, putting it in second place behind the United States which averages 1,200 a year.
using 100 year rain fall data
The Great Red Spot had happened 100 years ago!
A tornado with estimated winds of 100 mph would be rated EF1.
A typical tornado is about 50 to 100 yards wide.
Air pressures during a tornado can vary greatly, but they typically decrease significantly in the vicinity of the tornado. The lowest pressures are usually found at the center of the tornado, where the most intense winds are located. Pressure drops during tornadoes can be drastic and are often associated with the destructive forces of the storm.