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2011 Hurricane/Tropical Data for Southern Indian Ocean

Track Map

Individual Storm Summary

Winds in knots, pressure in millibars, category is based on Saffir-Simpson scale.

#NameDateWindPresCat 
1Tropical Storm VINCE 12-16 JAN 40 - 
2Cyclone-4 BIANCA 25-29 JAN 115 4 
3Cyclone-3 BINGIZA 09-17 FEB 100 3 
4Tropical Storm FOURTEEN 11-12 FEB 35 - 
5Cyclone-1 CARLOS 15-26 FEB 65 1 
6Cyclone-2 DIANNE 16-22 FEB 85 2 
7Tropical Storm CHERONO 17-19 MAR 45 - 
8Tropical Storm TWENTY 02-04 APR 35 - 
9Tropical Storm ERROL 15-18 APR 55 - 
10Cyclone-2 ALENGA 05-09 DEC 90 2 
11Tropical Storm TWO 06-07 DEC 35 - 
12Tropical Storm GRANT 25-27 DEC 40 - 
13Cyclone-2 BENILDE 28-31 DEC 90 2Active

Saffir-Simpson Scale

The chart color codes intensity (category based on Saffir-Simpson scale):

Type Category Pressure (mb) Winds
(knots)
Winds
(mph)
Line Color
Depression td ----- < 34 < 39 Green
Tropical Storm TS ----- 34-63 39-73 Yellow
Hurricane 1 > 980 64-82 74-95 Red
Hurricane 2 965-980 83-95 96-110 Light Red
Hurricane 3 945-965 96-112 111-130 Magenta
Hurricane 4 920-945 113-135 131-155 Light Magenta
Hurricane 5 < 920 >135 >155 White

NOTE: Pressures are in millibars and winds are in knots where one knot is equal to 1.15 mph


Individual Storm Details

Track
Current: TrackTrack
  • Cyclone-2 BENILDE (28-31 DEC)
    Storm - Max Winds: 90 Category: 2
    Current - Max Winds: 90 Category: 2
    
       WARNING POSITION:
       311800Z --- NEAR 15.9S 75.6E
         MOVEMENT PAST SIX HOURS - 215 DEGREES AT 07 KTS
         POSITION ACCURATE TO WITHIN 030 NM
         POSITION BASED ON EYE FIXED BY SATELLITE
       PRESENT WIND DISTRIBUTION:
       MAX SUSTAINED WINDS - 090 KT, GUSTS 110 KT
       WIND RADII VALID OVER OPEN WATER ONLY
       RADIUS OF 064 KT WINDS - 030 NM NORTHEAST QUADRANT
                                035 NM SOUTHEAST QUADRANT
                                035 NM SOUTHWEST QUADRANT
                                030 NM NORTHWEST QUADRANT
       RADIUS OF 050 KT WINDS - 045 NM NORTHEAST QUADRANT
                                050 NM SOUTHEAST QUADRANT
                                050 NM SOUTHWEST QUADRANT
                                045 NM NORTHWEST QUADRANT
       RADIUS OF 034 KT WINDS - 095 NM NORTHEAST QUADRANT
    
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  • Track
  • Tropical Storm GRANT (25-27 DEC)
    Storm - Max Winds: 40 Category: TS

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  • Tropical Storm TWO (06-07 DEC)
    Storm - Max Winds: 35 Category: TS

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  • Cyclone-2 ALENGA (05-09 DEC)
    Storm - Max Winds: 90 Category: 2

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  • Tropical Storm ERROL (15-18 APR)
    Storm - Max Winds: 55 Category: TS

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  • Tropical Storm TWENTY (02-04 APR)
    Storm - Max Winds: 35 Category: TS

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  • Tropical Storm CHERONO (17-19 MAR)
    Storm - Max Winds: 45 Category: TS

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  • Cyclone-2 DIANNE (16-22 FEB)
    Storm - Max Winds: 85 Category: 2

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  • Cyclone-1 CARLOS (15-26 FEB)
    Storm - Max Winds: 65 Category: 1

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  • Tropical Storm FOURTEEN (11-12 FEB)
    Storm - Max Winds: 35 Category: TS

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  • Cyclone-3 BINGIZA (09-17 FEB)
    Storm - Max Winds: 100 Category: 3

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  • Cyclone-4 BIANCA (25-29 JAN)
    Storm - Max Winds: 115 Category: 4

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  • Tropical Storm VINCE (12-16 JAN)
    Storm - Max Winds: 40 Category: TS

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