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Tropical Storm Iba (01Q) was an unusual fully-tropical cyclone in the South Atlantic Basin. It had peak winds of 40 kt and a minimum pressure of 1006 mbar.

Advisories issued: 21
12 h 24 h 36 h 48 h 72 h 96 h 120 h
Error (kts) 3.8 5.8 7.3 5.4 5.0 6.0
Forecasts 19 17 15 13 9 5 0
Bolded values indicate errors less than the 2010–17 National Hurricane Center average
# Date (UTC) Max. Winds Min. Pressure Forecaster
1 23/2100 25kt 1010mb TAM
2 24/0300 30kt 1009mb TAWX14
3 24/0900 35kt 1008mb TAWX14
4 24/1500 40kt 1007mb TAM
5 24/2100 40kt 1007mb TAM
6 25/0300 40kt 1007mb TAWX14
7 25/0900 40kt 1006mb TAWX14
8 25/1500 40kt 1006mb TAM
9 25/2100 40kt 1007mb TAM
10 26/0300 40kt 1007mb TAWX14
11 26/0900 35kt 1008mb TAWX14
12 26/1500 35kt 1008mb TAM
13 26/2100 35kt 1008mb TAM
14 27/0300 35kt 1008mb TAWX14
15 27/0900 35kt 1008mb TAWX14
16 27/1500 30kt 1009mb TAM
17 27/2100 30kt 1009mb TAM
18 28/0300 40kt 1008mb TAWX14
19 28/0900 40kt 1009mb TAWX14
20 28/1500 35kt 1010mb TAM
21 28/2100 30kt 1011mb TAM
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