Calm,(force 0) = 0 mph;    Light air (force 1) = 1 to 4 mph;    Light breeze (force 2) = 5 to 7 mph;    Gentle breeze (force 3) = 8 to 12mph;    Moderate breeze (force 4) = 13 to 18 mph;    Fresh breeze (force 5) = 19 to 24 mph;    Strong breeze (force 6) = 25 to 31 mph;    Near gale (force7) = 32 to 38 mph;    Gale (force 8) = 39 to 46 mph;    Strong gale (force 9)= 47 to 54 mph;    Storm (force 10) = 55 to 63 mph;    Violent storm (force11) = 64 to 73 mph;    Hurricane (force 12) = 74 + ; -
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Surface Pressure Map