Virginia averages 6 tornadoes per year.
No, tornadoes typically form over land in association with thunderstorms. Waterspouts, which are tornadoes that form over water, can occur in tropical oceans under specific conditions, but they are generally much weaker than tornadoes that form over land.
Tornadoes often, though not always, form along weather fronts, where air masses of differing characteristics collide. The fronts that most commonly produce tornadoes are cold fronts and dry lines.
Tornadoes can occur in the warm sector of a developing mid-latitude cyclone, typically associated with the cold front. Tornadoes often form along the leading edge of the cold front where warm, moist air is lifted rapidly by the advancing cold air.
It varies from one year to the next, but Virginia appears to average about 20 tornadoes per year.
Tornadoes do form in deserts, but very rarely. Deserts often see whirlwinds called dust devils. They look like tornadoes but are weaker and form on sunny days while tornadoes form from thunderstorms.
Tornadoes most often form on land, but they can form over water.
That there were 49 tornadoes in Virginia in 2011.
May
On average Illinois gets 55 tornadoes per year.
Virginia averages 6 to 10 tornadoes each year.
Tornadoes can form almost anywhere in North America but occur most often on the central plains of the United States.
Variations in temperature often play a role in the formation of tornadoes, but they are not the only factor.
They can form at any time of year, but most often form in the spring and summer.
Most tornadoes are produced by thunderstorms called supercells, though occasionally tornadoes form in squall lines.
No, tornadoes typically form over land in association with thunderstorms. Waterspouts, which are tornadoes that form over water, can occur in tropical oceans under specific conditions, but they are generally much weaker than tornadoes that form over land.
Most often the storms that produce tornadoes an other severe weather form along cold fronts.
Tornadoes often, though not always, form along weather fronts, where air masses of differing characteristics collide. The fronts that most commonly produce tornadoes are cold fronts and dry lines.