The main tool is Doppler radar, which can remotely measure wind speed and direction. This can be used to find rotation in a storm associate with a possible tornado. Another, recently developed tool is dual-polarized radar. Unlike conventional radar, this radar can distinguish between rain, hail, and tornadic debris.
A tornado warned storm is a thunderstorm for which a tornado warning has been issued, indicating that it is capable of producing a tornado. A tornado threat is a general term that refers to the danger tornadoes may pose to an area during a particular storm.
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A tornado watch means that general weather conditions may lead to tornadoes within a few hours, but there is no immediate threat.
There are two primary ways. First is Doppler radar, which measures winds moving toward and away from the radar to detect features in a storm that can produce a tornado, and sometimes the signature of the tornado itself. Then, by simply looking at where the storm is going they can warn places in the potential path. However, radar cannot determine if a tornado has actually touched down, and can occasionally miss a tornado. For this reason there are storm spotters. These are people who report severe weather such as tornadoes to authorities. Through such reports meteorologists (weather scientists) can gain a better idea of the potential threat.
A tornado watch means that general weather conditions are right for tornadoes to form, even if there is no imminent threat. If there is immediate danger of a tornado then a tornado warning will be issued. To help you remember, a tornado watch simply tells you to watch out.
A tornado is a violently rotating column of air extending from the base of a thunderstorm to the ground. Tornadoes are often made visible by a funnel cloud. A tornado watch is a type of weather advisory indicating that general weather conditions favor the formation of tornadoes, A tornado watch does not indicate any specific threat. A tornado alert is an obsolete weather advisory that indicated a storm with potential to produce a tornado. Tornado alerts were gradually phased out of use in the 1970s. Now any time a storm is capable of producing a tornado, a tornado warning is issued.
A tornado watch is issued by the Storm Prediction Center when general weather conditions are favorable for the formation of tornadoes. A watch is not issued for a particular location, but rather covers a large portion of one or more states. A tornado watch only indicates a general threat across a region and not an imminent threat. A tornado warning is issued by a local office of the National Weather Service if a tornado has been spotted or detected or if a thunderstorm has rotation that has a high chance of producing a tornado in the immediate future. A tornado warning usually covers portions of one or two counties based on the location, speed, and direction of the threatening storm.
A tornado warned storm is a thunderstorm for which a tornado warning has been issued, indicating that it is capable of producing a tornado. A tornado threat is a general term that refers to the danger tornadoes may pose to an area during a particular storm.
A warning is worse. It means that something (like a tornado) has been detected or the threat of one is imminent. A watch means the overall conditions are favorable to form bad weather (such as a tornado) in a general area.
A tornado threat is not a formal term in meteorology. It merely refers to the potential danger an area might face from tornadoes and the magnitude of that danger.
They are both important but more severe would be a tornado warning. A watch means that conditions are favorable for the development of tornadoes meaning you should be watching the weather, prepare a place to go, and watch the skies, local media, and on what ever you monitor the weather with online. I use the NWS but some people use local media and others use it all. Also, make sure that you have a NOAA weather radio to alert you if something happens
No. The National Weather Service issues tornado watches to inform people of a real tornado threat and to be on the lookout for tornadoes. During a tornado watch your chances of being hit by a tornado are quite low, but conditions are favorable for tornadoes to occur, and usually at least a few tornadoes will touch down in the watch area.
Tornado watches are issued based on the conditions that are present at the given time or forecast for the near future, regardless of what general monthly trends might be. Weather does weird things sometimes. To say that there is no real threat is not really true either, as western North Carolina has had tornadoes in all of these months.
During a tornado watch you should stay alert. Pay attention to broadcasts and advisories for if a tornado warning is issued, especially if there is a thunderstorm in your area. A tornado watch means that conditions are favorable for tornadoes to form, but the threat is not immediate. A tornado warning means that a tornado has been spotted or detected, or there is an immediate threat of one forming.