2005 North Indian Ocean Tropical Cyclones

Tropical Cyclone Cyclogenesis Date Cyclolysis Date Saffir-Simpson Category Maximum 6-hr Sustained Wind (kt) Maximum 6-hr Wind Gust (kt) Estimated Accumulated Cyclone Energy (ACE*) Index (kt2) Landfall Information (date, location and sustained winds)
01B 1/8/05 1/10/05 TD 25 35 N/A
02B 1/14/05 1/17/05 TS 35 45 0.980 x 104
03B 10/2/05 10/3/05 TS 35 45 0.3675 x 104 10/3/05 - West Bengal state, India (35 kt)
04B 10/27/05 10/28/05 TS 35 45 0.3675 x 104 10/28/05 - Andhra Pradesh state, India (35 kt)
Baaz 11/27/05 12/2/05 TS 45 55 2.6625 x 104
Fanoos 12/6/05 12/10/05 Cat 1 65 80 4.98375 x 104 12/10/05 - Tamil Nadu state, India (55 kt)
07B 12/17/05 12/22/05 TS 45 55 3.03375 x 104

Preliminary 2005 North Indian Ocean ACE Index = 12.39495 x 104 kt2

*The Accumulated Cyclone Energy (ACE) Index is calculated by summing the squares of the estimated 6-hourly maximum sustained wind speed in knots (Vmax2) for all periods in which the tropical cyclone is a tropical storm or greater intensity. For a complete description of the ACE Index see Bell et al. (2000), Bulletin of the American Meteorological Society (81) S1-S50.


The Saffir-Simpson Scale for Tropical Cyclones

Category Miles Per Hour (mph) Knots (kt) Kilometers Per Hour (km hr-1)
Tropical Storm (TS)
39-73 34-63 63-118
Cat 1
74-95 64-82 119-153
Cat 2
96-110 83-95 154-177
Cat 3
111-130 96-113 178-209
Cat 4
131-155 114-135 210-249
Cat 5
156 or greater 136 or greater 250 or greater