Dvorak Current Intensity Chart
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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