No one can predict exactly when an area will have a tornado far in the future and therefore no one knows.
There is nothing that is specifically called a tornado advisory, but there are two types of advisory that relate to tornadoes. A tornado watch is issued if overall conditions in a region favor the formation of tornadoes. Meaning there is a risk, but not an imminent threat. A tornado warning is more serious. This means that a tornado has been spotted or detected, or that observations of a thunderstorm indicate that one is likely to form soon. Each of these advisories has a subcategory. A PDS tornado watch (particularly dangerous situation) indicates that a system is likely to produce strong tornadoes. A tornado emergency is an unofficial variety of tornado waring that indicates a large tornado is threatening a populated area and has the potential to cause major damage.
The average tornado probably has peak winds in the range of 85-110 miles per hour, corresponding to an EF1 tornado. The tornadoes that cause major damage are stronger, but less common.
Tornadoes can merge together, yes, and vortex physics predict that the combined tornado will be larger than either of the merging tornadoes. However, most tornado mergers involve a large tornado absorbing a small one, so the larger tornado is not affected very much.
Tornadoes generally are not a major cause of erosion.While tornadoes produces very intense winds, exposures is generally quite brief, and it is extremely rare for any given spot to be hit by one. In some cases tornado winds can sour away soil.
There have been a number of major tornadoes in Ohio, the worst however was the Xenia, Ohio tornado of April 3, 1974. This tornado was rated F5, the highest intensity level for tornadoes and was one of the strongest and most destructive tornadoes of the 20th century.
Yes. Dallas is one of the most tornado-prone major cities in the country.
obama was elected, a major tornado hit the south
usually hundreds if it is a minor tornado but if it is major, usually thousands of people.
Alley
There is concern for a major tornado outbreak on April 5, but it is highly unlikely that it will be as severe as the outbreak in late April 2011. Outbreaks such as that happen only happen a few times in a century.
Major organizations that help after a tornado include FEMA and the Red Cross. Many people also have insurance to cover tornado damage.
A strong tornado is one that is EF2 or stronger. A violent tornado is one that is EF4 or EF5.
A tornado watch is given out if general weather conditions favor the formation of tornadoes over the next few hours. A PDS (Particularly Dangerous Situation) tornado watch may be issued if conditions favor the formation of strong to violent tornadoes. A tornado watch usually covers an area at least the size of a state. A tornado warning is issued if a tornado has been spotted or detected or the threat of one is imminent. A tornado emergency is an informal variety of tornado warning meaning that a large tornado is approaching a populated area and is expected to cause major damage. A tornado warning usually covers an area about the size of a county.
Some major tornado researchers of the past and present include Tetsuya Fujita, Thomas P. Grazulis, Joshua Wurman, Howard Bluestein, and Tim Samaras.
If two tornadoes meet, they will merge to form one tornado.
The last tornado to hit Seattle was in 1971.