Dvorak Current Intensity Chart

CI Number MWS (Knots) MWS (MPH) MSLP (Atlantic) MSLP (NW Pacific) Saffir-Simpson Category (Approx.)
1 25 KTS 29 MPH
1.5 25 KTS 29 MPH
2 30 KTS 35 MPH 1009 mb 1000 mb
2.5 35 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
4.5 77 KTS 89 979 mb 966 mb 1
5 90 KTS 104 MPH 970 mb 954 mb 2
5.5 102 KTS 117 MPH 960 mb 941 mb 3
6 115 KTS 132 MPH 948 mb 927 mb 4
6.5 127 KTS 146 MPH 935 mb 914 mb 4
7 140 KTS 161 MPH 921 mb 898 mb 5
7.5 155 KTS 178 MPH 906 mb 879 mb 5
7.5 170 KTS 196 MPH 906 mb 879 mb 5