Dvorak technique
Cyclone Monica attained its peak intensity on 23 April near Cape Wessel with a barometric pressure 916 hPa (mbar; ). Maximum winds were estimated at 250 km/h (155 mph ) by the Bureau of Meteorology while the JTWC assessed it to have attained winds of 285 km/h (180 mph ). Using the Dvorak technique, the peak intensity of the cyclone was estimated at T-number of 7.5 according to the Satellite Analysis Branch (), yet the Advanced Dvorak Technique of the CIMSS automatically estimated at T8.0, the highest ranking on the Dvorak Scale. However, since the JTWC, SAB and CIMSS are not the official warning centres for Australian cyclones, these intensities remain unofficial.