Saffir–Simpson hurricane wind scale
Although dry air significantly reduced deep convection on 4 March, MFR upgraded Gafilo to a tropical cyclone due to a banding eye, when the system began to expand its clockwise circulation and track west-southwestwards. By dual outflow channels, Gafilo underwent rapid deepening and reached category 4 strength on the Saffir–Simpson hurricane wind scale on 5 March, as MFR also upgraded Gafilo to an intense tropical cyclone late on the same day. On 6 March, besides warm sea surface temperature above 29 °C, the atypical third outflow channel from the west made conditions for the cyclone more favourable. Therefore, MFR upgraded Gafilo to a very intense tropical cyclone with a very well-defined circular and warm diameter eye at 06Z, when it also reached category 5 strength on the Saffir–Simpson hurricane wind scale. At 12Z, Gafilo attained its peak intensity by the ten-minute maximum sustained winds reaching 125 knots (230 km/h, 145 mph) and the atmospheric pressure decreasing to , although microwave imagery showed that the eyewall replacement cycle had begun.