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Typhoon Haiyan was a devastating, once in a lifetime storm that ravaged most of the central and southern Philippines during early November 2013. Throughout it's 8 day life, Haiyan claimed at least 7401 lives, and caused $2.86 billion in economic damages. The origins of this historic superstorm an be traced back to a tropical disturbance that developed to the south of Pohnpei on November 1. Moving at a relatively quick pace to the west for most of it's life, Haiyan became a tropical depression on November 3, then a tropical storm early the next day. After becoming a typhoon on November 5, Haiyan began an exceptional phase of explosive intensification, and doubled it's intensity over a period of 18 hours, and becoming a category 5 super typhoon late on November 6. Even after attaining category 5 intensity, Haiayan continued it's impressive rate of intensification, and attained an estimated peak intensity with a pressure of 874 mbar at 1800 UTC on November 7, as the system was making landfall near Toclaban City in the Philippines. I have estimated teh 1-minute winds to have been 205 mph, and the 10-minute winds to have been 150 mph, along with another estimated value, the pressure of 874 mbar. This also corresponds to a pressure reading of 887 mbar that was recorded on the southern edge of the eye near Toclaban a few hours after landfall. Continuing to move over the Philippines, Haiyan began to slowly weaken, and the system emerged into the South China Sea as a moderate category 4 typhoon about 24 hours later, with a disrupted circulation due to land interaction. Although Haiayan did slowly reorganise, the storm deteriorated significantly whilst replacing it's damaged eyewall, and on November 10, the system made landfall in Vietnam as a high end tropical storm. After moving inland, Haiyan rapidly became extratropical, which was was completed by 1200 UTC the following day.

SSHWS category 1-min winds 10-min winds Pressure Location Date and time ACE generated
Tropical Depression 30 mph 30 mph 1004 mbar 5.8N, 157.2E 03/11/2013 0600 UTC N/A
Tropical Depression 35 mph 35 mph 1000 mbar 6.1N, 155.5E 03/11/2013 1200 UTC N/A
Tropical Depression 35 mph 35 mph 1000 mbar 6.1N, 153.3E 03/11/2013 1800 UTC N/A
Tropical Storm 40 mph 40 mph 998 mbar 6.1N, 152.2E 04/11/2013 0000 UTC 0.1225
Tropical Storm 45 mph 40 mph 996 mbar 6.2N, 150.4E 04/11/2013 0600 UTC 0.1600
Tropical Storm 50 mph 45 mph 993 mbar 6.3N, 148.8E 04/11/2013 1200 UTC 0.2025
Tropical Storm 65 mph 50 mph 989 mbar 6.5N, 147.2E 04/11/2013 1800 UTC 0.3025
Category 1 typhoon 80 mph 65 mph 982 mbar 6.5N, 145.9E 05/11/2013 0000 UTC 0.4900
Category 1 typhoon 85 mph 70 mph 977 mbar 6.5N, 144.6E 05/11/2013 0600 UTC 0.5625
Category 2 typhoon 105 mph 80 mph 962 mbar 6.9N, 142.9E 05/11/2013 1200 UTC 0.8100
Category 3 typhoon 125 mph 90 mph 941 mbar 7.1N, 141.3E 05/11/2013 1800 UTC 1.2100
Category 4 super typhoon 150 mph 105 mph 925 mbar 7.3N, 139.7E 06/11/2013 0000 UTC 1.6900
Category 5 super typhoon 160 mph 110 mph 922 mbar 7.6N, 138.0E 06/11/2013 0600 UTC 1.9600
Category 5 super typhoon 175 mph 120 mph 916 mbar 7.9N, 136.2E 06/11/2013 1200 UTC 2.2500
Category 5 super typhoon 180 mph 120 mph 916 mbar 8.2N, 134.3E 06/11/2013 1800 UTC 2.4025
Category 5 super typhoon 185 mph 130 mph 900 mbar 8.7N, 132.8E 07/11/2013 0000 UTC 2.5600
Category 5 super typhoon 190 mph 140 mph 892 mbar 9.4N, 131.1E 07/11/2013 0600 UTC 2.7225
Category 5 super typhoon 200 mph 145 mph 882 mbar 10.2N, 129.1E 07/11/2013 1200 UTC 3.0625
Category 5 super typhoon 205 mph 150 mph 874 mbar 10.6N, 126.9E 07/11/2013 1800 UTC 3.2400
Category 5 super typhoon 195 mph 130 mph 890 mbar 11.0N, 124.8E 08/11/2013 0000 UTC 2.8900
Category 5 super typhoon 160 mph 115 mph 915 mbar 11.4N, 122.5E 08/11/2013 0600 UTC 1.9600
Category 4 typhoon 140 mph 90 mph 935 mbar 11.9N, 120.5E 08/11/2013 1200 UTC 1.4400
Category 4 typhoon 130 mph 90 mph 945 mbar 12.2N, 118.0E 08/11/2013 1800 UTC 1.3225
Category 3 typhoon 120 mph 85 mph 950 mbar 12.6N, 116.2E 09/11/2013 0000 UTC 1.0025
Category 2 typhoon 105 mph 80 mph 959 mbar 13.4N, 114.6E 09/11/2013 0600 UTC 0.8100
Category 2 typhoon 105 mph 80 mph 962 mbar 14.5N, 113.1E 09/11/2013 1200 UTC 0.8100
Category 2 typhoon 100 mph 80 mph 967 mbar 15.4N, 111.4E 09/11/2013 1800 UTC 0.7225
Category 1 typhoon 90 mph 80 mph 970 mbar 16.5N, 110.3E 10/11/2013 0000 UTC 0.6400
Category 1 typhoon 85 mph 80 mph 972 mbar 17.9N, 109.0E 10/11/2013 0600 UTC 0.5625
Category 1 typhoon 75 mph 75 mph 980 mbar 19.4N, 108.0E 10/11/2013 1200 UTC 0.4225
Tropical Storm 70 mph 70 mph 987 mbar 20.4N, 107.5E 10/11/2013 1800 UTC 0.3600
Tropical Storm 60 mph 60 mph 992 mbar 21.8N, 107.3E 11/11/2013 0000 UTC 0.2500
Tropical Storm 40 mph 35 mph 998 mbar 23.2N, 107.9E 11/11/2013 0600 UTC 0.1225
Total ACE 36.2735 units

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