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Advisory-force and gale-force winds will not trigger a separate wind advisory or warning if a Blizzard warning is already in effect. However, as seen with Hurricane Sandy, if widespread high wind warnings are in effect prior to the issuance of a blizzard warning, the high wind warnings may be continued.
Wind advisory. A wind advisory is generally issued by the National Weather Service of the United States when there are sustained thunderstorm winds of 31–39 miles per hour (50–63 km/h) and/or gusts of 46–57 miles per hour (74–92 km/h) over land. Winds over the said cap will trigger high wind alerts rather than a wind advisory.
It is more severe than a wind advisory, but not as severe as an extreme wind warning, which is generally issued if hurricane-force winds are expected. The high wind warning is not issued if a tropical storm warning, blizzard warning, winter storm warning, severe thunderstorm warning, dust storm warning, or tornado warning covers the phenomenon. [5]
An extreme wind warning (SAME code EWW) is an alert issued by the National Weather Service for areas that will experience sustained surface winds 100 knots (115 mph, 185 km/h, 51 m/s) or greater within one hour, due to a landfalling tropical cyclone. Extreme wind warnings are intended to provide guidance to the general public at a county or sub ...
In the United States, a gale warning is specifically a maritime warning; the land-based equivalent in National Weather Service warning products is a wind advisory. Other sources use minima as low as 28 knots (52 km/h; 14 m/s; 32 mph), and maxima as high as 90 knots (170 km/h; 46 m/s; 100 mph).
Gale watch. A gale watch is issued by the National Weather Service of the United States when there is an increased risk for a gale-force wind event, meaning sustained surface winds, or frequent gusts, of 34 to 47 knots (39 to 54 mph; 63 to 87 km/h), but the occurrence, location, and/or timing of the event is still uncertain. [ 1]
Storm warning. Storm warning flag (US) At sea, a storm warning is a warning issued by the National Weather Service of the United States when winds between 48 knots (89 km/h, 55 mph) and 63 knots (117 km/h, 73 mph) are occurring or predicted to occur soon. The winds must not be associated with a tropical cyclone. [1]
Local Weather Forecast Offices (WFO) of the National Weather Service may issue a Special Weather Statement to alert of a specified hazard that is approaching or below warning or advisory criteria, that does not have a specific alert product code of their own (such as for widespread funnel clouds with limited to no threat of complete tornadogenesis, the likelihood of landspouts, or strong ...
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