موسم الاعاصير في المحيط الاطلسي في عام 2003 ملخص الموسم
تفاعلت موجة استوائية مع مستوى منخفض من المستوى العلوي لتطوير منطقة من الحمل الحراري بالقرب من هيسبانيولا في 23 يوليو وتم تطوير دوران من المستوى المتوسط إلى الأدنى في النظام عند تتبعه بشكل عام من الشمال إلى الشمال الغربي ، واستناداً إلى الرصدات السطحية والساتلية ، يُقدر أن النظام قد تطور إلى منخفض استوائي 7 عند الساعة 1200 بالتوقيت العالمي المنسق في 25 يوليو على بعد 60 ميل (95كم) شرق دايتونا بيتش ، فلوريدا. تم تضمين النظام في بيئة تتميز بضغوط سطح عالية. من خلال تتبع درجات حرارة المياه الباردة ، بالإضافة إلى الرياح غير المستوية من المستوى الأعلى ، فشل المنخفض الجوي في تحقيق رياح تزيد عن 35 ميلاً في الساعة (55كم / ساعة).
في وقت مبكر من 26 يوليو انتقلت إلى الشاطئ في جزيرة سانت كاترينز ، جورجيا ، وبعد أن تراجعت بشكل مطرد بسبب الأراضي التي تبددها في 27 يوليو حيث لم يكن من المتوقع أن تحصل العاصفة على حالة العاصفة الاستوائية ، لم يتم إصدار أي تحذيرات أو عواصف مدارية. ومع ذلك ، تم نشر ساعات الفيضانات لكثير من جورجيا وساوث كارولينا.انخفض مستوي المنخفض الجوي مسببا سقوط الأمطار معتدلة من ولاية فلوريدا إلى ساحل ولاية كارولينا الشمالية ، وبلغت ذروتها في 5.17 في (131 ملم) في سافانا ، جورجيا. في الغالب ، كانت معدلات هطول الأمطار ما بين 1 و 3 بوصات (25و 67ملم) شائعة. لم ترد أي تقارير عن وقوع أضرار أو إصابات مرتبطة بهذا المنخفض الجوي.
On August 22, a tropical wave moved off the coast of Africa, and it remained disorganized until reaching the eastern Gulf of Mexico on September 1. A tropical disturbance developed into Tropical Depression Twelve on September 3 about 300 mi (480 km) west of Tampa، Florida. It moved eastward and strengthened into Tropical Storm Henri on September 5, and despite strong wind shear it intensified to reach peak winds of 60 mph (95 km/h) later that day. Subsequently, it quickly weakened, and it struck the western Florida coast as a tropical depression. On September 8 it degenerated into a remnant low pressure area off the coast of North Carolina, and after moving ashore near Cape Hatteras, it crossed the Mid-Atlantic states and dissipated on September 17 over New England.
A tropical wave moved off the coast of Africa on September 1, which developed into Tropical Depression Thirteen early on September 6 to the southwest of the Cape Verde islands. It quickly intensified into Tropical Storm Isabel, and it continued to gradually intensify within an area of light wind shear and warm waters. Isabel strengthened to a hurricane on September 7, and the following day it attained major hurricane status. Its intensity fluctuated over the subsequent days as it passed north of the Lesser Antilles, and it attained peak winds of 165 mph (270 km/h) on September 11, a Category 5 hurricane on the Saffir-Simpson Scale. The hurricane oscillated between Category 4 and Category 5 status over the following four days, before weakening due to wind shear. On September 18 Isabel made landfall between Cape Lookout and Ocracoke Island in North Carolina with winds of 105 mph (165 km/h). It continued northwestward, becoming extratropical over western Pennsylvania before being absorbed by a larger storm over Ontario on September 19.
Strong winds from Isabel extended from North Carolina to New England and westward to West Virginia. The winds, combined with previous rainfall which moistened the soil, downed many trees and power lines across its path, leaving about 6 million electricity customers without power at some point. Coastal areas suffered from waves and its powerful storm surge, with areas in eastern North Carolina and southeast Virginia reporting severe damage from both winds and the storm surge. Throughout its path, Isabel resulted in $5.5 billion in damage (2003 USD) and 47 deaths, of which 16 were directly related to the storm's effects.
The governors of Pennsylvania، West Virginia، Maryland، New Jersey, and Delaware declared states of emergencies. Isabel was the first major hurricane to threaten the Mid-Atlantic States and the South since Hurricane Floyd in September 1999. Isabel's greatest impact was due to flood damage, the worst in some areas of Virginia since 1972's Hurricane Agnes. More than 60 million people were affected to some degree — a similar number to Floyd but more than any other hurricane in recent memory.
A strong tropical wave moved off the coast of Africa on September 6, and almost immediately it became associated with a broad surface circulation. With favorable upper-level winds the system quickly became better organized, and on September 8 it possessed enough organization to be classified as Tropical Depression Fourteen while located about 290 mi (465 km) southeast of the southernmost Cape Verde islands. Initially the depression failed to maintain an inner core of deep convection, and despite its occurrence with nearby dry air, the depression was forecast to intensify to hurricane status due to anticipated favorable conditions.
In the hours subsequent to formation, the convection near the center decreased as the banding features dissipated. Dry air greatly increased over the depression, and by September 9 the system was not forecast to intensify past minimal tropical storm status. Later that day an upper-level low tracked southward to the west of the depression, which increased wind shear and caused a steady north-northwest motion for the depression. The circulation became elongated and separated from the convection as it passed just west of the Cape Verde Islands, where it brought heavy rainfall, and on September 10 the depression dissipated.