Tornadoes

Objects can be picked up by tornadic winds and become deadly projectiles. Structures can collapse, potentially crushing people inside. People can even be picked up and hurled to their deaths.

See the link below for an image of the symbol used in weather reports.

In addition, on a radar image, a tornado vortex signature may be marked by a triangle with one corner pointing down.

800 tornadoes per year is an outdated statistic for the average annual number of thrnadoes in the United States. Improved detection in the past 20 years or so has shown that the real average is closer to 1,200 per year.

Not usually. A few tornadoes have been noted to have rainbows near them, but most are not. The vast majority of rainbows are not associated with tornadic storms.

Most tornadoes develop from a portion of a thunderstorm called a mesocyclone.

There a few conditions that tornades need in order to develop. First, they require an sunstable atmosphere that will favor the formation of severe thunderstorms. Next, they need a fairly high relative humidity, which aids in the final stages of tornado formation. Third, there needs to be wind shear. This is what gives thunderstorms the rotation they need to spawn tornadoes. Most tornadoes are associated with some sort of front, but not all.

Niether. In the unlikely event that a tornado and a tsunami met, the tornado would go right over the tsunami and neither would be significantly affected.

A rope-shaped tornado is a narrow tornado with a rope-like appearance. If a tornado is rope-shaped, that often means it is weak or starting to dissipate.

Damage from the Tri-State tornado has been tallied at $16.5 million at the time it ocurred. This works out to about $220 million in modern values. It struck on Wednesday, March 18, 1925.

The Ditch was created on 2010-09-06.

If you mean how many subvortices have developed within a single tornado, some tornadoes have been reported to have had as many as eight smaller vortices within the main circulation at once.

If you mean the most tornadoes spawned by a single storm system, that record goes to the tornado outbreak of April 25-28, 2011. That storm system produced 351 tornadoes over the course of four days.

In terms of most tornadoes spanwed by a single thunderstorm, it is unclear as in some cases, especially in older records, mutliple tornadoes are often lsited as a single tornado.

Air does go up in a tornado and it is cooler than surrounding air due to decompression. However, it is generally fed by warm air. If too much cold air gets into the circulation, the tornado will dissipate.

They can't combine into a single storm, if that's what you mean, as tornadoes and hurricanes operate on different levels of magnitude within the atmosphere. Howevere, many hurricanes spawn tornadoes in their outer storm bands.

People research tornadoes to learn more about them and how they work. Partially out of curiousity and partially to get information that could improve warnings.

Tornado activity in the U.S. is monitored by branches of the National Weather Service.

It varies considerably. Warnings for major tornado may have a better lead time than averages because the signature is usually easier to detect on radar. Lead time is often 15 to 20 minutes. This can include time before the tornado touches down.

However, there is quite a bit of variability. Greensburg Kansas, which was hit by an EF5 tornado in 2007, had 39 minutes warning. By contrast, Cincinnati, Arkansas, which was hit by an EF3 tornado in 2010, had no warning.

If you only consider the time after the tornado has touched down, lead times can be shorter, as sometimes a tornado will develop just outside a town, leaving little time to update warnings. In the case of Joplin, Missouri in 2011, the tornado touched down less than a mile outside of town and entered the city two minutes later. A tornado warning has been in effect for 17 minutes before the tornado formed, warning of the potential for a tornado.

For long-term outlooks, scientists use computer models to predict the behavior of weather systems. This can predict the general risk for tornadoes across a region, but not wehat specific areas will likely be hit.

On the short term, the rotation in a storm that may produce a tornado is detected using Doppler radar. The radar may also detect the tornado itself.

Tornadoes in February and March most often occur in the southeastern United States, especially the Gulf Coast states of Texas, Louisiana, Mississippi, Alabama, and Florida.

No. General scientific consensus is that most tornadoes start forming up inside a thunderstorm and extend downward. There is evidence that some tornadoes form from the ground up, however.

Many tornadoes are weak and cause little to no damage. If such a tornado occur in a rempote location with nobody to report, there is a good chance it won't be recorded.

There was no Tri-State tornado in 2014. While there were tornadoes across several states in the most recent outbreak, no single tornado caused damage in more than two states.

The infamous Tri-State tornado ocurred in 1925, killing 695 people.

In the recent tornado outbreak at the end of April 2014 there were 8 killer tornadoes that killed a total of 34 people in 5 states.

Yes. All 50 states in the United States have had tornadoes. North Carolina, the state immediately to the east of Tennessee, has recorded tornadoes as strong as F4.

Dallas Tornado ended in 1981.

The eye of a tornado is a relatively calm area that can sometimes be found at the tornado's center, similar to the ey of a hurricane.