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www.washingtonpost.com/.../wp/2014/07/09/what-makes-a-thunderstorm-severe

What makes a thunderstorm “severe” ... The public severe thunderstorm watch set the damaging wind criteria at 75 mph while the aviation watches were set at 50 knots, or 58 mph. The difference ...

www.nssl.noaa.gov/education/svrwx101/thunderstorms

Severe Weather 101 Thunderstorm Basics. What we do: Read more about NSSL's thunderstorm research here. What is a thunderstorm? A thunderstorm is a rain shower during which you hear thunder. Since thunder comes from lightning, all thunderstorms have lightning.

whnt.com/2017/02/17/what-is-a-severe-thunderstorm-what-makes-a-storm-severe

What makes a storm severe? When meteorologists talk about "bad" storms, what they're referring to are storms that meet severe limits. So when you wonder if "it's going to get bad", listen for ...

www.weather.gov/bgm/severedefinitions

A Severe Thunderstorm Watch is issued by the Storm Prediction Center in Norman, Oklahoma. Prior to the issuance of a Severe Thunderstorm Watch, SPC will usually contact the affected local National Weather Service Forecast Office (see map above) and they will discuss what their current thinking is on the weather situation.

en.wikipedia.org/wiki/Severe_thunderstorm_warning

Severe thunderstorm warnings are given as either a broad-based warning, covering expected impact in a weather reporting area, or as a detailed warning, when a thunderstorm is within weather-watch radar range and includes a map depicting any existing thunderstorms and the forecast direction of movement for up to 60 minutes.

www.wwlp.com/2014/06/04/what-makes-a-thunderstorm-severe

June through August are the months in which we typically get severe weather in western Massachusetts, but what makes a storm severe? A severe thunderstorm isn’t about the thunder and lightning ...

en.wikipedia.org/wiki/Thunderstorm

A severe thunderstorm warning is issued if a thunderstorm becomes severe, or will soon turn severe. In Canada, a rainfall rate greater than 50 millimetres (2 in) in one hour, or 75 millimetres (3 in) in three hours, is also used to indicate severe thunderstorms. Severe thunderstorms can occur from any type of storm cell. However, multicell ...

www.youtube.com/watch?v=SvjV5thPZtU

What makes a severe thunderstorm? What makes a severe thunderstorm? Skip navigation Sign in. Search. Loading... Close. This video is unavailable. Watch Queue Queue. Watch Queue Queue.

weather.com/safety/thunderstorms/news/severe-thunderstorm-warnings-why-they-matter

In general, if an NWS severe thunderstorm warning mentions the wording above, you would be wise to seek shelter as if it was a tornado warning, based on this potential for a tornado to quickly ...

www.weatherwizkids.com/weather-thunderstorms.htm

Thunderstorms What is a thunderstorm? A thunderstorm is a storm with lightning and thunder. Its produced by a cumulonimbus cloud, usually producing gusty winds, heavy rain and sometimes hail. What causes a thunderstorm? The basic ingredients used to make a thunderstorm are moisture, unstable air and lift.