Meteorological Analysis
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Bertha originated from a tropical wave which left the African coast on July 1st.
The tropical wave moved west under the subtropical ridge while slowly
organizing, and became a tropical depression on the 5th. The depression
moved quite fast under the subtropical ridge as it strengthened, and became
tropical storm Bertha as it headed WNW at 20-25 kt. Bertha then strengthened
into a hurricane as it moved through the Lesser Antilles and Leeward Islands on
the 8th. As Bertha turned north on the 9th away from Puerto Rico, it reached
its peak intensity of 115 mph. Bertha then scraped by the Bahamas, bringing
hurricane force winds to the easternmost islands. A trough over the United
states then began to influence Bertha, and Bertha accelerated more northerly.
Bertha made landfall near Topsail Beach, NC on the 11th with winds of about
105 mph. Bertha quickly weakened as it moved north but, brought gale force
winds up the east coast. Bertha finally became extratropical on the 14th as it
passed the Canadian Maritimes, and passed by Greenland on the 17th.
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Casualty and Damage Overview
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12 deaths have been attributed to Bertha, scattered across the eastern
Caribbean and eastern United States. Bertha caused damage to thousands of
homes in the Caribbean and in North Carolina from high winds and storm
surge. Total United States damage from Bertha is estimated to be $270 million.
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Bertha Hurricane Research Division Products
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Imagery
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Tracking Data
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Date: Time: Lat: Lon: Wind(mph): Pressure: Storm Type:
07/05/ 0 GMT 9.80 34.00 34 1009 Tropical Depression
07/05/ 6 GMT 10.20 36.30 34 1008 Tropical Depression
07/05/ 12 GMT 11.00 39.00 40 1007 Tropical Storm
07/05/ 18 GMT 12.00 41.20 40 1006 Tropical Storm
07/06/ 0 GMT 12.70 43.90 40 1005 Tropical Storm
07/06/ 6 GMT 13.10 46.60 40 1004 Tropical Storm
07/06/ 12 GMT 13.70 48.70 45 1002 Tropical Storm
07/06/ 18 GMT 14.20 51.00 51 1000 Tropical Storm
07/07/ 0 GMT 14.90 52.90 57 999 Tropical Storm
07/07/ 6 GMT 15.60 54.80 63 997 Tropical Storm
07/07/ 12 GMT 16.40 56.90 68 995 Tropical Storm
07/07/ 18 GMT 16.50 58.40 80 992 Hurricane - Category 1
07/08/ 0 GMT 17.00 60.10 86 988 Hurricane - Category 1
07/08/ 6 GMT 17.50 61.80 86 985 Hurricane - Category 1
07/08/ 12 GMT 18.00 63.50 80 983 Hurricane - Category 1
07/08/ 18 GMT 18.60 64.90 86 978 Hurricane - Category 1
07/09/ 0 GMT 19.40 66.10 91 970 Hurricane - Category 1
07/09/ 6 GMT 20.30 67.70 114 960 Major Hurricane - Category 3
07/09/ 12 GMT 21.40 69.40 114 965 Major Hurricane - Category 3
07/09/ 18 GMT 22.50 71.10 103 967 Hurricane - Category 2
07/10/ 0 GMT 23.60 72.60 97 969 Hurricane - Category 2
07/10/ 6 GMT 24.50 74.00 91 971 Hurricane - Category 1
07/10/ 12 GMT 25.40 75.30 91 968 Hurricane - Category 1
07/10/ 18 GMT 26.40 75.80 91 966 Hurricane - Category 1
07/11/ 0 GMT 27.50 76.40 86 968 Hurricane - Category 1
07/11/ 6 GMT 28.30 76.80 86 972 Hurricane - Category 1
07/11/ 12 GMT 29.20 77.50 86 977 Hurricane - Category 1
07/11/ 18 GMT 30.00 78.00 80 980 Hurricane - Category 1
07/12/ 0 GMT 30.70 78.30 80 982 Hurricane - Category 1
07/12/ 6 GMT 31.20 78.60 80 984 Hurricane - Category 1
07/12/ 12 GMT 32.20 78.40 97 975 Hurricane - Category 2
07/12/ 18 GMT 33.60 78.10 103 974 Hurricane - Category 2
07/13/ 0 GMT 35.00 77.60 74 993 Hurricane - Category 1
07/13/ 6 GMT 36.70 77.00 68 993 Tropical Storm
07/13/ 12 GMT 38.30 76.10 68 994 Tropical Storm
07/13/ 18 GMT 40.20 74.50 68 994 Tropical Storm
07/14/ 0 GMT 42.10 71.90 68 994 Tropical Storm
07/14/ 6 GMT 44.10 69.00 63 995 Tropical Storm
07/14/ 12 GMT 46.00 66.00 57 995 Extratropical Storm
07/14/ 18 GMT 47.00 62.00 57 995 Extratropical Storm
07/15/ 0 GMT 48.00 57.00 57 995 Extratropical Storm
07/15/ 6 GMT 49.00 52.00 51 996 Extratropical Storm
07/15/ 12 GMT 51.00 47.00 45 996 Extratropical Storm
07/15/ 18 GMT 54.00 44.00 45 996 Extratropical Storm
07/16/ 0 GMT 57.50 42.50 45 991 Extratropical Storm
07/16/ 6 GMT 58.50 42.50 45 988 Extratropical Storm
07/16/ 12 GMT 59.50 42.00 51 988 Extratropical Storm
07/16/ 18 GMT 59.80 41.00 51 985 Extratropical Storm
07/17/ 0 GMT 60.00 40.00 45 993 Extratropical Storm
07/17/ 6 GMT 60.50 39.00 40 1001 Extratropical Storm
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Tracking maps courtesy of NHC
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Selected Satellite Image
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