Meteorological Analysis
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Hermine originated from a tropical wave which moved off the African coast on
September 5th. The tropical wave raised little suspicion as it moved west under
the subtropical ridge until September 12th, when convection increased with the
wave as it approached the Lesser Antilles. The wave then continued to generate
convection as it moved through the Caribbean and eventually into the Gulf of
Mexico. A low pressure then formed in association with the wave once it was over the
Gulf of Mexico and gradually organized. By the 17th the wave was organized
enough to be considered a tropical depression. The depression initially moved
in a small loop as it interacted with an upper low over the Bay of Campeche.
The depression then strengthened into tropical storm Hermine on the 19th
despite heavy shear, and reached its max winds of 45 mph the same day.
On the 20th Hermine made landfall with winds of 40 mph in Cocodrie, Louisiana.
Hermine was very asymmetrical due to shear at landfall. Hermine then
dissipated as it moved inland on the 20th.
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Casualty and Damage Overview
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There are no reports of casualties or damage in association with Hermine.
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Hermine Hurricane Research Division Products
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Imagery
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Tracking Data
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Tropical Storm Hermine
Time Lat Lon Wind(mph) Pressure Storm type
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12 GMT 09/17/98 26.9N 90.3W 35 1001 Tropical Depression
18 GMT 09/17/98 26.8N 91.6W 35 1001 Tropical Depression
0 GMT 09/18/98 26.4N 92.1W 35 1000 Tropical Depression
6 GMT 09/18/98 25.7N 92.5W 35 999 Tropical Depression
12 GMT 09/18/98 26.0N 92.5W 35 999 Tropical Depression
18 GMT 09/18/98 25.9N 92.3W 35 1000 Tropical Depression
0 GMT 09/19/98 25.8N 92.0W 35 1001 Tropical Depression
6 GMT 09/19/98 26.4N 91.4W 35 1001 Tropical Depression
12 GMT 09/19/98 27.5N 91.3W 40 1001 Tropical Storm
18 GMT 09/19/98 28.3N 91.1W 45 1000 Tropical Storm
0 GMT 09/20/98 29.0N 90.9W 45 999 Tropical Storm
6 GMT 09/20/98 29.2N 90.9W 40 1001 Tropical Storm
12 GMT 09/20/98 30.5N 90.5W 35 1002 Tropical Depression
18 GMT 09/20/98 31.0N 90.0W 25 1003 Tropical Depression
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Tracking maps courtesy of NHC
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Selected Satellite Image
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