National Weather Service United States Department of Commerce

WIND - the movement of air from areas of higher pressure to areas of lower pressure. The greater the difference in pressure the stronger the winds. Wind direction is defined by the direction it is coming from.
 

HIGH WIND WATCH - issued by your local NWS Forecast Office when sustained wind speeds of 40 mph or greater lasting for one hour or longer or for winds of 58 mph or greater for any duration or widespread damage are possible
 

HIGH WIND WARNING - issued by your local NWS Forecast Office when sustained wind speeds of 40 mph or greater lasting for one hour or longer or for winds of 58 mph or greater for any duration or widespread damage are expected.
 

WIND ADVISORY - issued by your local NWS Forecast Office when sustained wind speeds of 31 to 39 mph lasting for one hour or longer or for winds of 46 to 57 mph for any duration are expected.