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The Spotter Network (SN) is a system that utilizes storm spotter and chaser reports of location and severe weather in a centralized framework for use by coordinators such as emergency managers, Skywarn and related spotter organizations, and the National Weather Service.
In Canada, a severe thunderstorm is defined as having wind gusts of greater than 90 km/h (56 mph), hail with a diameter of greater than two centimetres (0.79 in), rainfall rates of greater than 50 millimetres (2.0 in) in one hour or greater than 75 millimetres (3.0 in) in three hours, or tornadoes. [14]
Skywarn (sometimes stylized as SKYWARN) is a program of the National Weather Service (NWS). Its mission is to collect reports of localized severe weather in the United States. These reports are used to aid forecasters in issuing and verifying severe weather watches and warnings and to improve the forecasting and warning processes and the tools ...
SKYWARN is a volunteer program with between 350,000 and 400,000 trained severe weather spotters. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 ...
The US National Weather Service developed an organized storm spotter training system starting in the 1970's. Meteorologist Alan Moller played a significant role in the development of the effort. He believed that storm spotters are a vital part of the Integrated Warning System since they provide "ground truth verification" for forecasters.
Even as the Canadian storm that triggered intense lake-effect snow and heavy snow squalls and brought the first flakes of the season to much of the Interstate 95 Northeast is moving away, shifting ...
The primary role of REACT volunteers was to stand and watch on CB Emergency Channel 9 to help motorists. Later, duties grew to include radio communications after disasters (e.g., tornadoes and floods), and before disasters (storm spotting). REACT safety communications for parades, runs/walks, and other community events also became prominent.
The BTI, a product that was recently introduced, is mainly used to determine the probability of the presence of a tornado or tornadoes inside a tornadic vortex signature on the rear flank of the storm, to better alert potential high risk areas for tornadoes and to easily track them. With the help of radar data, mesoscale models and algorithms ...