cloudy black sky,cold temperature dropping and snow or rain falling.
Tornadoes are not a result of oceanic conditions, they are a result of atmosphereic conditions. See the related question for more information.
No. Many tornadoes form in a rain-free portion of their parent thunderstorms. Some tornadoes form with low-precipitation supercells, which produce little or no rain.
There have been tornadoes reported in all 50 states in the United States in the year 1950. While some states have a higher frequency of tornadoes, it is possible for tornadoes to occur in any state under the right conditions.
No, tornadoes never cause a blizzard. I will note that some storm systems that produce blizzard conditions on their northwest side, can also produce tornadoes on their southeast side. Perfect example was March 13, 1993 when a storm storm system moved out of the Gulf of Mexico (While Alabama and Georgia were getting blizzard conditions, Florida was getting tornadoes)
Tornadoes usually last only a few minutes, some only for seconds. However, a few tornadoes can go for a couple of hours.
Humidity itself does not cause tornadoes. Tornadoes form from the interaction of different air masses with varying temperature, humidity, and wind conditions. High humidity levels can contribute to the instability needed for severe thunderstorms that can produce tornadoes under the right atmospheric conditions.
Tornadoes occur in other countries besides the US. However, the US heartland has ideal conditions for tornadoes.
The Tornadoes website offers a variety of information about tornadoes. These include: types and categories of tornadoes, weather conditions that signify tornadoes forming, and safety tips.
Generally not. Tornadoes form from thunderstorms called supercells, which form under similar conditions to ordinary thunderstorms and as anybody can tell you, thunderstorms don't need to form over an ocean. That said, some tornadoes do form on the ocean.
No. Many tornadoes form in a rain-free portion of their parent thunderstorms. Some tornadoes form with low-precipitation supercells, which produce little or no rain.
No, people cannot prevent tornadoes. Tornadoes are natural weather phenomena that form under specific atmospheric conditions and are beyond human control. However, people can take precautions to stay safe during tornadoes by having a plan in place and seeking shelter in designated areas.
Yes. All tornadoes are produced by thunderstormsYes, all tornadoes are produced by thunderstorms.However, only a small percentage of thunderstorms actually produce tornadoes.