Severe Thunder CriteriaJuly 17th, 2012 at 6:58 pm by Tony Petrarca under Tony's Pinpoint Weather Blog
All thunderstorms can be dangerous because all thunderstorms produce lightning. ..but what defines a “severe” thunderstorm. Per the National Weather Service, it is based on 3 criteria.
1. Hail size
2. Wind Speed (non-tornado winds)
3. Actual Tornado touch down?
Hail needs to be 3/4 inch diameter or larger….Wind gusts higher than 57 mph, or an actual tornado is formed within the thunderstorm. There is the potential Wednesday afternoon of thunderstorms..some which may be strong to borderline severe. A cold front will approach and act as a trigger to set off storms which will be fueled by the current heat and humidity….stay tuned to forecasts and blogs next 24 hours….Tony Petrarca