Storm Activity: Aug 28, 2011 - Sep 12, 2011
Sep 12 · 18:00 GMT 70 mph 974 mb Extratropical
| Sep 12 | 18:00 GMT | 59.5 | 0 | 70 mph | 974 mb | Extratropical | -- |
| Sep 12 | 15:00 GMT | 58.82 | -3.78 | 70 mph | 973 mb | Extratropical | -- |
| Sep 12 | 12:00 GMT | 58 | -7 | 70 mph | 972 mb | Extratropical | -- |
| Sep 12 | 09:00 GMT | 57.08 | -9.46 | 70 mph | 971 mb | Extratropical | -- |
| Sep 12 | 06:00 GMT | 56.2 | -11.6 | 70 mph | 970 mb | Extratropical | -- |
| Sep 12 | 03:00 GMT | 55.45 | -13.92 | 70 mph | 969 mb | Extratropical | -- |
| Sep 12 | 00:00 GMT | 54.7 | -16.3 | 70 mph | 968 mb | Extratropical | -- |
| Sep 11 | 21:00 GMT | 53.76 | -18.68 | 70 mph | 967 mb | Extratropical | -- |
| Sep 11 | 18:00 GMT | 52.8 | -21.1 | 70 mph | 966 mb | Extratropical | -- |
| Sep 11 | 15:00 GMT | 51.95 | -23.5 | 70 mph | 965 mb | Extratropical | -- |
| Sep 11 | 12:00 GMT | 51.1 | -26 | 70 mph | 964 mb | Extratropical | -- |
| Sep 11 | 09:00 GMT | 50.1 | -28.57 | 75 mph | 962 mb | Extratropical | 1 |
| Sep 11 | 06:00 GMT | 49.1 | -31.3 | 80 mph | 960 mb | Extratropical | 1 |
| Sep 11 | 03:00 GMT | 48.18 | -34.15 | 80 mph | 958 mb | Extratropical | 1 |
| Sep 11 | 00:00 GMT | 47.3 | -37.2 | 80 mph | 957 mb | Extratropical | 1 |
| Sep 10 | 21:00 GMT | 46.35 | -40.37 | 85 mph | 955 mb | Extratropical | 1 |
| Sep 10 | 18:00 GMT | 45.4 | -43.7 | 85 mph | 954 mb | Extratropical | 1 |
| Sep 10 | 15:00 GMT | 44.41 | -47.23 | 85 mph | 954 mb | Extratropical | 1 |
| Sep 10 | 12:00 GMT | 43.5 | -50.6 | 85 mph | 954 mb | Extratropical | 1 |
| Sep 10 | 09:00 GMT | 42.79 | -53.52 | 85 mph | 955 mb | Hurricane | 1 |
| Sep 10 | 06:00 GMT | 42.2 | -56.1 | 85 mph | 956 mb | Hurricane | 1 |
| Sep 10 | 03:00 GMT | 41.58 | -58.4 | 85 mph | 957 mb | Hurricane | 1 |
| Sep 10 | 00:00 GMT | 41 | -60.5 | 85 mph | 958 mb | Hurricane | 1 |
| Sep 9 | 21:00 GMT | 40.41 | -62.69 | 85 mph | 959 mb | Hurricane | 1 |
| Sep 9 | 18:00 GMT | 39.8 | -64.6 | 85 mph | 960 mb | Hurricane | 1 |
| Sep 9 | 15:00 GMT | 39.16 | -66.06 | 85 mph | 960 mb | Hurricane | 1 |
| Sep 9 | 12:00 GMT | 38.5 | -67.1 | 85 mph | 961 mb | Hurricane | 1 |
| Sep 9 | 09:00 GMT | 37.81 | -67.86 | 85 mph | 962 mb | Hurricane | 1 |
| Sep 9 | 06:00 GMT | 37.1 | -68.4 | 85 mph | 963 mb | Hurricane | 1 |
| Sep 9 | 03:00 GMT | 36.36 | -68.95 | 90 mph | 963 mb | Hurricane | 1 |
| Sep 9 | 00:00 GMT | 35.6 | -69.4 | 90 mph | 964 mb | Hurricane | 1 |
| Sep 8 | 21:00 GMT | 34.83 | -69.76 | 90 mph | 964 mb | Hurricane | 1 |
| Sep 8 | 18:00 GMT | 34.1 | -70 | 90 mph | 965 mb | Hurricane | 1 |
| Sep 8 | 15:00 GMT | 33.43 | -70.15 | 90 mph | 965 mb | Hurricane | 1 |
| Sep 8 | 12:00 GMT | 32.8 | -70.2 | 90 mph | 966 mb | Hurricane | 1 |
| Sep 8 | 09:00 GMT | 32.14 | -70.18 | 90 mph | 966 mb | Hurricane | 1 |
| Sep 8 | 06:00 GMT | 31.5 | -70.1 | 90 mph | 967 mb | Hurricane | 1 |
| Sep 8 | 03:00 GMT | 30.87 | -70.04 | 90 mph | 967 mb | Hurricane | 1 |
| Sep 8 | 00:00 GMT | 30.3 | -69.9 | 90 mph | 968 mb | Hurricane | 1 |
| Sep 7 | 21:00 GMT | 29.8 | -69.65 | 90 mph | 968 mb | Hurricane | 1 |
| Sep 7 | 18:00 GMT | 29.4 | -69.3 | 90 mph | 969 mb | Hurricane | 1 |
| Sep 7 | 15:00 GMT | 29.08 | -68.87 | 90 mph | 969 mb | Hurricane | 1 |
| Sep 7 | 12:00 GMT | 28.8 | -68.4 | 90 mph | 969 mb | Hurricane | 1 |
| Sep 7 | 09:00 GMT | 28.49 | -67.99 | 95 mph | 968 mb | Hurricane | 1 |
| Sep 7 | 06:00 GMT | 28.2 | -67.6 | 100 mph | 967 mb | Hurricane | 2 |
| Sep 7 | 03:00 GMT | 27.93 | -67.24 | 100 mph | 965 mb | Hurricane | 2 |
| Sep 7 | 00:00 GMT | 27.7 | -66.9 | 100 mph | 964 mb | Hurricane | 2 |
| Sep 6 | 21:00 GMT | 27.51 | -66.54 | 105 mph | 961 mb | Hurricane | 2 |
| Sep 6 | 18:00 GMT | 27.3 | -66.2 | 110 mph | 959 mb | Hurricane | 2 |
| Sep 6 | 15:00 GMT | 27.01 | -65.91 | 115 mph | 956 mb | Hurricane | 3 |
| Sep 6 | 12:00 GMT | 26.7 | -65.6 | 120 mph | 954 mb | Hurricane | 3 |
| Sep 6 | 09:00 GMT | 26.45 | -65.22 | 125 mph | 950 mb | Hurricane | 3 |
| Sep 6 | 06:00 GMT | 26.2 | -64.8 | 130 mph | 946 mb | Hurricane | 4 |
| Sep 6 | 03:00 GMT | 25.92 | -64.39 | 135 mph | 944 mb | Hurricane | 4 |
| Sep 6 | 00:00 GMT | 25.6 | -64 | 140 mph | 942 mb | Hurricane | 4 |
| Sep 5 | 21:00 GMT | 25.2 | -63.7 | 130 mph | 944 mb | Hurricane | 4 |
| Sep 5 | 18:00 GMT | 24.8 | -63.4 | 125 mph | 946 mb | Hurricane | 3 |
| Sep 5 | 15:00 GMT | 24.48 | -63.03 | 120 mph | 948 mb | Hurricane | 3 |
| Sep 5 | 12:00 GMT | 24.2 | -62.6 | 115 mph | 950 mb | Hurricane | 3 |
| Sep 5 | 09:00 GMT | 23.9 | -62.12 | 110 mph | 952 mb | Hurricane | 3 |
| Sep 5 | 06:00 GMT | 23.6 | -61.6 | 110 mph | 954 mb | Hurricane | 2 |
| Sep 5 | 03:00 GMT | 23.31 | -61.09 | 105 mph | 955 mb | Hurricane | 2 |
| Sep 5 | 00:00 GMT | 23 | -60.6 | 105 mph | 957 mb | Hurricane | 2 |
| Sep 4 | 21:00 GMT | 22.65 | -60.14 | 105 mph | 958 mb | Hurricane | 2 |
| Sep 4 | 18:00 GMT | 22.3 | -59.7 | 105 mph | 959 mb | Hurricane | 2 |
| Sep 4 | 15:00 GMT | 21.99 | -59.25 | 100 mph | 960 mb | Hurricane | 2 |
| Sep 4 | 12:00 GMT | 21.7 | -58.8 | 100 mph | 961 mb | Hurricane | 2 |
| Sep 4 | 09:00 GMT | 21.41 | -58.34 | 90 mph | 965 mb | Hurricane | 1 |
| Sep 4 | 06:00 GMT | 21.1 | -57.9 | 85 mph | 969 mb | Hurricane | 1 |
| Sep 4 | 03:00 GMT | 20.74 | -57.5 | 85 mph | 973 mb | Hurricane | 1 |
| Sep 4 | 00:00 GMT | 20.4 | -57.1 | 80 mph | 978 mb | Hurricane | 1 |
| Sep 3 | 21:00 GMT | 20.14 | -56.65 | 75 mph | 980 mb | Hurricane | 1 |
| Sep 3 | 18:00 GMT | 19.9 | -56.2 | 75 mph | 982 mb | Hurricane | 1 |
| Sep 3 | 15:00 GMT | 19.66 | -55.79 | 75 mph | 984 mb | Hurricane | 1 |
| Sep 3 | 12:00 GMT | 19.4 | -55.4 | 75 mph | 986 mb | Hurricane | 1 |
| Sep 3 | 09:00 GMT | 19.09 | -55.05 | 75 mph | 986 mb | Hurricane | 1 |
| Sep 3 | 06:00 GMT | 18.8 | -54.7 | 75 mph | 987 mb | Hurricane | 1 |
| Sep 3 | 03:00 GMT | 18.58 | -54.32 | 75 mph | 987 mb | Hurricane | 1 |
| Sep 3 | 00:00 GMT | 18.4 | -53.9 | 75 mph | 987 mb | Hurricane | 1 |
| Sep 2 | 21:00 GMT | 18.21 | -53.46 | 75 mph | 987 mb | Hurricane | 1 |
| Sep 2 | 18:00 GMT | 18 | -53 | 75 mph | 987 mb | Hurricane | 1 |
| Sep 2 | 15:00 GMT | 17.71 | -52.55 | 75 mph | 987 mb | Hurricane | 1 |
| Sep 2 | 12:00 GMT | 17.4 | -52.1 | 75 mph | 987 mb | Hurricane | 1 |
| Sep 2 | 09:00 GMT | 17.1 | -51.67 | 75 mph | 987 mb | Hurricane | 1 |
| Sep 2 | 06:00 GMT | 16.8 | -51.2 | 75 mph | 988 mb | Hurricane | 1 |
| Sep 2 | 03:00 GMT | 16.49 | -50.65 | 75 mph | 988 mb | Hurricane | 1 |
| Sep 2 | 00:00 GMT | 16.2 | -50 | 75 mph | 988 mb | Hurricane | 1 |
| Sep 1 | 21:00 GMT | 15.93 | -49.28 | 75 mph | 988 mb | Hurricane | 1 |
| Sep 1 | 18:00 GMT | 15.7 | -48.5 | 75 mph | 988 mb | Hurricane | 1 |
| Sep 1 | 15:00 GMT | 15.48 | -47.72 | 75 mph | 988 mb | Hurricane | 1 |
| Sep 1 | 12:00 GMT | 15.3 | -46.9 | 75 mph | 988 mb | Hurricane | 1 |
| Sep 1 | 09:00 GMT | 15.19 | -46.06 | 75 mph | 988 mb | Hurricane | 1 |
| Sep 1 | 06:00 GMT | 15.1 | -45.2 | 75 mph | 988 mb | Hurricane | 1 |
| Sep 1 | 03:00 GMT | 14.96 | -44.35 | 75 mph | 988 mb | Hurricane | 1 |
| Sep 1 | 00:00 GMT | 14.8 | -43.5 | 75 mph | 988 mb | Hurricane | 1 |
| Aug 31 | 21:00 GMT | 14.61 | -42.66 | 70 mph | 989 mb | Tropical Storm | -- |
| Aug 31 | 18:00 GMT | 14.4 | -41.8 | 70 mph | 990 mb | Tropical Storm | -- |
| Aug 31 | 15:00 GMT | 14.2 | -40.91 | 65 mph | 992 mb | Tropical Storm | -- |
| Aug 31 | 12:00 GMT | 14 | -40 | 65 mph | 994 mb | Tropical Storm | -- |
| Aug 31 | 09:00 GMT | 13.81 | -39.1 | 65 mph | 994 mb | Tropical Storm | -- |
| Aug 31 | 06:00 GMT | 13.6 | -38.2 | 65 mph | 994 mb | Tropical Storm | -- |
| Aug 31 | 03:00 GMT | 13.36 | -37.3 | 60 mph | 995 mb | Tropical Storm | -- |
| Aug 31 | 00:00 GMT | 13.1 | -36.4 | 60 mph | 997 mb | Tropical Storm | -- |
| Aug 30 | 21:00 GMT | 12.86 | -35.49 | 60 mph | 997 mb | Tropical Storm | -- |
| Aug 30 | 18:00 GMT | 12.6 | -34.6 | 60 mph | 997 mb | Tropical Storm | -- |
| Aug 30 | 15:00 GMT | 12.3 | -33.75 | 55 mph | 999 mb | Tropical Storm | -- |
| Aug 30 | 12:00 GMT | 12 | -32.9 | 50 mph | 1,001 mb | Tropical Storm | -- |
| Aug 30 | 09:00 GMT | 11.74 | -31.99 | 50 mph | 1,002 mb | Tropical Storm | -- |
| Aug 30 | 06:00 GMT | 11.5 | -31.1 | 45 mph | 1,004 mb | Tropical Storm | -- |
| Aug 30 | 03:00 GMT | 11.24 | -30.32 | 45 mph | 1,005 mb | Tropical Storm | -- |
| Aug 30 | 00:00 GMT | 11 | -29.6 | 40 mph | 1,006 mb | Tropical Storm | -- |
| Aug 29 | 21:00 GMT | 10.81 | -28.88 | 35 mph | 1,007 mb | Tropical Depression | -- |
| Aug 29 | 18:00 GMT | 10.6 | -28.2 | 35 mph | 1,008 mb | Tropical Depression | -- |
| Aug 29 | 15:00 GMT | 10.25 | -27.6 | 35 mph | 1,008 mb | Tropical Depression | -- |
| Aug 29 | 12:00 GMT | 9.9 | -27 | 35 mph | 1,008 mb | Tropical Depression | -- |
| Aug 29 | 09:00 GMT | 9.66 | -26.32 | 30 mph | 1,008 mb | Tropical Depression | -- |
| Aug 29 | 06:00 GMT | 9.5 | -25.6 | 30 mph | 1,009 mb | Tropical Depression | -- |
| Aug 29 | 03:00 GMT | 9.37 | -24.89 | 30 mph | 1,009 mb | Tropical Low | -- |
| Aug 29 | 00:00 GMT | 9.3 | -24.2 | 30 mph | 1,009 mb | Tropical Low | -- |
| Aug 28 | 21:00 GMT | 9.28 | -23.54 | 30 mph | 1,009 mb | Tropical Low | -- |
| Aug 28 | 18:00 GMT | 9.3 | -22.9 | 30 mph | 1,009 mb | Tropical Low | -- |
| Aug 28 | 15:00 GMT | 9.29 | -22.25 | 30 mph | 1,009 mb | Tropical Low | -- |
| Aug 28 | 12:00 GMT | 9.3 | -21.6 | 30 mph | 1,010 mb | Tropical Low | -- |
| Aug 28 | 09:00 GMT | 9.34 | -20.95 | 25 mph | 1,010 mb | Tropical Low | -- |
| Aug 28 | 06:00 GMT | 9.4 | -20.3 | 25 mph | 1,011 mb | Tropical Low | -- |
| Aug 28 | 03:00 GMT | 9.45 | -19.65 | 25 mph | 1,011 mb | Tropical Low | -- |
| Aug 28 | 00:00 GMT | 9.5 | -19 | 25 mph | 1,012 mb | Tropical Low | -- |
Learn more about Hurricane Katia and the 2011 Atlantic hurricane season in our hurricane archive.
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