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CI MWS MWS MSLP MSLP Saffir-Simpson Number (Knots) (MPH) (Atlantic) (NW Pacific) Category 1 25 KTS 29 MPH (Approximate) 1.5 25 KTS 29 MPH 2 30 KTS 35 MPH 1009 mb 1000 mb 2.5 35 KTS 40 MPH 1005 mb 997 mb 3 45 KTS 52 MPH 1000 mb 991 mb 3.5 55 KTS 63 MPH 994 mb 984 mb 4 65 KTS 75 MPH 987 mb 976 mb 1 (64-83 KTS) 4.5 77 KTS 89 MPH 979 mb 966 mb 1 (64-83 KTS); 2 (84-96 KTS) 5 90 KTS 104 MPH 970 mb 954 mb 2 (84-96 KTS); 3 (97-113 KTS) 5.5 102 KTS 117 MPH 960 mb 941 mb 3 (97-113 KTS) 6 115 KTS 132 MPH 948 mb 927 mb 4 (114-135 KTS) 6.5 127 KTS 146 MPH 935 mb 914 mb 4 (114-135 KTS) 7 140 KTS 161 MPH 921 mb 898 mb 5 (136+ KTS) 7.5 155 KTS 178 MPH 906 mb 879 mb 5 (136+ KTS) 8 170 KTS 196 MPH 890 mb 858 mb 5 (136+ KTS) CI -- Current Intensity MWS -- Mean Wind Speed MSLP -- Mean Sea Level Atmospheric Pressure in Millibars
