The NOAA states that the current average warning time before a tornado-due to advances in weather technology, such as Doppler radar-is 13 minutes. The residents of Moore, Oklahoma, got 16 minutes lead time, but this may have been due to Oklahoma having more spotters than other areas. The technology is steadily improving, but at this point I don't think you can say 20 minutes. Going by the NOAA and Moore, Oklahoma, information, I would say that the answer is an average of thirteen minutes, with isolated incidents of a few more minutes.
The average lead time for a tornado warning is 14 minutes.
The average lead time for a tornado warning is 15 minutes.
Not very far. The average lead time for a tornado warning is 14 minutes. However, the potential for tornadoes across a region can be forecast several days in advance.
No. There wasn't even a warning. The tornado was detected, but due to communication problems the warning was never issued. Additionally, when a tornado is coming the advice is usually to take cover rather than evacuate, as there usually isn't enough time for an evacuation.
Not really. Although there were some attempts at warnings during that general time period, no warnings were issued for the Waco tornado, largely due to failures in communication. The Waco tornado served as a catalyst to develop a warning system.
The average lead time for a tornado warning is 14 minutes.
The average lead time for a tornado warning is 14 minutes.
The average lead time for a tornado warning is 15 minutes.
The average lead time for a tornado warning is 15 minutes. Sometimes you get more warning, sometimes less.
It varies. The average lead time for a tornado warning in the United States is 14 minutes. However, in recent years lead times have been as long as 39 minutes, while in other cases there has been no warning.
Average lead time for a tornado warning is about 15 minutes. In rares cases it can be over 30 minutes.
It varies, but the average lead-time for a tornado warning is 15 minutes. Sometime lead times of up to half an hour can be issued.
Not usually. Today the average lead time for a tornado warning is about 15 minutes, which is enough time for most people to get to the safest part of their home but not enough time to evacuate the area. Meteorologists are working to increase the lead time.
No. The advance notice of a tornado warning is msured in minutes. The average lead time is 14 minutes. Lead times of over 30 minutes are rare.
It varies quite a bit. The average warning time is about 15 minutes.
Not very far. The average lead time for a tornado warning is 14 minutes. However, the potential for tornadoes across a region can be forecast several days in advance.
It varies. The average lead time for a tornado warning is 14 minutes, but in some cases there is no warning while in others, there have been lead times over 30 minutes. This is based on the ability to issue a warning before a tornado even touches down. If you are warning of an approaching tornado that is already on the ground, it depends on where the tornado is and how fast it's moving. This citizens of Greensburg, Kansas had 39 minutes of warning as a tornado approached their town on May 4, 2007, while Smitville, Mississippi was struck by a tornado that had formed just outside of town less than two minutes earlier.