Meteorological Analysis
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Ivan originated from a tropical wave which left the coast of Africa on September
16th. The wave began to organize once over the warm waters of the Atlantic
and became a tropical depression on the 19th, about 175 nm SW of the Cape
Verde Islands. A trough over the central Atlantic then caused the depression
to turn NW on th 20th, the trough also caused shear over the depression.
Despite the shear, the depression became tropical storm Ivan on the 20th,
reaching winds of 65 mph on the 22nd before starting to weaken from shear.
Ivan rebounded however and became a hurricane on the 23rd at about 30 N.
Ivan then strengthened to its maximum intensity of 90 mph on the 26th with a
pressure of 975 mb, about 300 nm W of the Azores. The westerlies then caught
Ivan on the 26th and caused the storm to move E. Shear also began to increase
over Ivan at this time and Ivan weakened to a tropical storm on the 27th.
Cooler waters also contributed to weakening. Ivan then rapidly became
extratropical on the 27th and moved into the British Isles as a gale center.
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Casualty and Damage Overview
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There are no reports of casualties or damage in association with Ivan.
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Imagery
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Tracking Data
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Hurricane Ivan
Time Lat Lon Wind(mph) Pressure Storm type
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0 GMT 09/19/98 13.4N 26.6W 30 1010 Tropical Depression
6 GMT 09/19/98 13.1N 27.5W 30 1010 Tropical Depression
12 GMT 09/19/98 12.9N 28.2W 30 1010 Tropical Depression
18 GMT 09/19/98 13.1N 29.0W 30 1010 Tropical Depression
0 GMT 09/20/98 13.4N 29.6W 35 1009 Tropical Depression
6 GMT 09/20/98 14.3N 30.6W 35 1009 Tropical Depression
12 GMT 09/20/98 15.2N 31.5W 35 1008 Tropical Depression
18 GMT 09/20/98 16.0N 32.6W 40 1006 Tropical Storm
0 GMT 09/21/98 16.8N 33.7W 40 1005 Tropical Storm
6 GMT 09/21/98 17.4N 34.9W 40 1003 Tropical Storm
12 GMT 09/21/98 18.2N 35.6W 40 1003 Tropical Storm
18 GMT 09/21/98 19.0N 36.0W 45 1002 Tropical Storm
0 GMT 09/22/98 20.0N 36.1W 45 1001 Tropical Storm
6 GMT 09/22/98 21.3N 36.1W 50 1000 Tropical Storm
12 GMT 09/22/98 22.9N 36.4W 50 997 Tropical Storm
18 GMT 09/22/98 24.2N 37.1W 65 994 Tropical Storm
0 GMT 09/23/98 25.6N 37.7W 60 996 Tropical Storm
6 GMT 09/23/98 26.9N 38.4W 50 997 Tropical Storm
12 GMT 09/23/98 28.3N 39.2W 65 990 Tropical Storm
18 GMT 09/23/98 29.6N 40.2W 75 987 Category 1 Hurricane
0 GMT 09/24/98 30.5N 40.9W 75 986 Category 1 Hurricane
6 GMT 09/24/98 31.3N 41.6W 80 985 Category 1 Hurricane
12 GMT 09/24/98 32.3N 42.0W 80 985 Category 1 Hurricane
18 GMT 09/24/98 33.4N 42.3W 80 985 Category 1 Hurricane
0 GMT 09/25/98 34.4N 42.3W 80 984 Category 1 Hurricane
6 GMT 09/25/98 35.3N 41.9W 80 984 Category 1 Hurricane
12 GMT 09/25/98 36.3N 41.3W 80 984 Category 1 Hurricane
18 GMT 09/25/98 37.2N 40.2W 85 983 Category 1 Hurricane
0 GMT 09/26/98 38.1N 38.7W 85 980 Category 1 Hurricane
6 GMT 09/26/98 39.2N 36.3W 90 975 Category 1 Hurricane
12 GMT 09/26/98 40.1N 33.1W 85 977 Category 1 Hurricane
18 GMT 09/26/98 40.7N 29.7W 85 982 Category 1 Hurricane
0 GMT 09/27/98 40.7N 25.7W 70 994 Tropical Storm
6 GMT 09/27/98 40.9N 22.7W 60 997 Tropical Storm
12 GMT 09/27/98 41.3N 19.2W 50 1000 Tropical Storm
18 GMT 09/27/98 41.5N 15.5W 45 1002 Tropical Storm
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Tracking maps courtesy of NHC
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Selected Satellite Image
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