STORM WINDS On the Beaufort Wind Scale, a wind with speeds from 56 to 63 knots (64 to 72 miles per hour).
Thunderstorm winds also cause widespread damage and occasional fatalities. Thunderstorm "straight-line" winds originate from rain-cooled air that descends with accompanying precipitation.
SMW(Special Marine Warning) - A warning product issued for potentially hazardous weather conditions usually of short duration (up to 2 hours) producing sustained marine thunderstorm winds or associated gusts of 34 knots or greater; ...
Generally, severe thunderstorm winds (58 miles per hour and higher) are needed to generate gustnadoes. Damaging gustnadoes most often form in straight-line wind events and are more prevalent in thunderstorms with winds in excess of 100 miles per hour.
The term is mainly used to distinguish thunderstorm winds from tornadic winds. Straight-Line winds originate as a downdraft of rain-cooled air, which reaches the ground and spreads out rapidly, producing a potentially damaging wind gusts.
Storm winds: Above 48 knots
Gust: a sudden increase of wind of short duration, usually a few seconds.
STRAIGHT LINE WINDS: Thunderstorm winds most often found with the gust front. They originate from downdrafts and can cause damage which occurs in a "straight line", as opposed to tornadic wind damage which has circular characteristics.
STRAIGHT LINE WINDS- Damaging thunderstorm winds produced as air rushes downward from a thunderstorm.
Severe Thunderstorm Watch- Outlines an area where hail up to 3/4 inch in diameter or larger and damaging thunderstorm winds are expected to occur.
" Duststorm winds can also be associated with thunderstorm outflows and gust fronts.
weather information.
or
A warning issued for 2 hours or less by the National Weather Service to warn boaters of any of the following that is not adequately covered by the existing Coastal Waters Forecast:
1) thunderstorm or non-thunderstorm winds ...
 See also: Thunder, Storm, Thunderstorm, Gust Front, Gust
  
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