Everything about Severe Weather totally explained
Severe weather is any destructive
weather phenomenon. The term is usually used to refer to
severe thunderstorms and related phenomena, such as
tornados,
hail, and
downbursts.
Severe weather can also refer to snowstorms, ice storms, blizzards, flooding, hurricanes, and high winds.
Terminology
In its broadest sense, the term "severe weather" is defined as any aspect of the weather which can "pose a threat to life and property". This can include phenomena such as
tropical cyclones,
ice storms,
wind storms,
blizzards,
heat waves, and severe thunderstorms. However, as stated above, common usage of the word refers to severe thunderstorms, with three-quarter inch size hail, damaging winds in excess of 50 knots (58 miles per hour), and/or
tornadoes.
Severe Summer Weather
Severe summer weather can be put into three different categories. These are approaching severe, severe, and significant severe. Approaching severe is defined as hail between 1/2 and 3/4 inch diameter or winds between 50 and 58 M.P.H. (50 knots). In the
United States, such storms will usually warrant a
Significant Weather Advisory. Severe is defined as hail 3/4 inch diameter or larger, winds 58 M.P.H. or stronger, or a tornado. Significant severe is defined as hail 2 inch in diameter or larger, winds 75 M.P.H. (65 knots) or stronger, or a tornado of strength EF2 or stronger. Both severe and significant severe events will warrant a
severe thunderstorm warning from the
National Weather Service or
Environment Canada if the event is in the United States or Canada, respectively. If a tornado is occurring or if it's likely one will occur, the severe thunderstorm warning will be superseded by a
tornado warning, which warns for other elements of a severe thunderstorm as well as the tornado itself.
Initiation
Organized severe weather tends to occur in the same conditions which cause ordinary thunderstorms: atmospheric moisture, lift, and
instability.
Further Information
Get more info on 'Severe Weather'.
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