The Weather Channel has put together some useful information on the cities along the East Coast where Hurricane Irene is likely to hit. They list the cities, estimates of worst conditions, approximate hours with tropical storm force winds and major hazards.
Outer Banks, NC/ Morehead City
Projected timing of worst conditions:through Saturday evening
Approximate hours with Tropical storm force winds: 27 hours
Major Hazards: 5 to 10 inches of rain; Storm surge of 5-9 ft.; Severe beach erosion
Norfolk, VA
Projected timing of worst conditions: Saturday morning to late Saturday night
Approximate hours with Tropical storm force winds: 24 hours
Major Hazards:6 to 12 inches of rain
Storm surge of 4-8 ft.
Severe beach erosion
Wind peak 60-80mph
Ocean City, MD
Projected timing of worst conditions: Midday Saturday to midday Sunday
Approximate hours with Tropical storm force winds: 24 hours
Major Hazards: 5 to 10 inches of rain
Storm surge of 4-8 ft.
Severe beach erosion
Wind Peak 60-80mph
Baltimore, MD
Projected timing of worst conditions: Saturday afternoon to Sunday morning
Approximate hours with Tropical storm force winds: 9 hours
Major Hazards: 6 to 12 inches of rain
Storm surge of 1-3 ft.
Peak winds 45-65mph
Philadelphia, PA
Projected timing of worst conditions: Late Saturday afternoon to midday Sunday
Approximate hours with Tropical storm force winds:12 hours
Major Hazards: 6 to 12 inches of rain
Storm surge of 1-3 ft.
Peak wind 45-65mph
Atlantic City, NJ
Projected timing of worst conditions: Saturday afternoon to midday Sunday
Approximate hours with Tropical storm force winds: 21 hours
Major Hazards: 5 to 10 inches of rain
Storm surge of 3-7 ft.
Severe beach erosion
Peak wind 55-75mph
New York City, NY
Projected timing of worst conditions:Saturday Evening to Sunday evening
Approximate hours with Tropical storm force winds: 21 hours
Major Hazards: 6 to 12 inches of rain
Storm surge of 4-8 ft.
Peak wind 55-75mph
Providence, RI
Projected timing of worst conditions: Late Saturday night to Sunday evening
Approximate hours with Tropical storm force winds: 18 hours
Major Hazards: 3 to 6 inches of rain
Storm surge of 4-7 ft
Peak Wind 40-60mph
Boston, MA
Projected timing of worst conditions:Sunday morning through Sunday eve.
Approximate hours with Tropical storm force winds: 18 hours
Major Hazards: 2 to 4 inches of rain
Peak Wind 40-60mph
Cape Cod, MA
Projected timing of worst conditions: Sunday morning through Sunday eve.
Approximate hours with Tropical storm force winds: 21 hours
Major Hazards: 2 to 4 inches of rain
Storm surge of 3-6 ft
Peak Wind 40-60 mph
Portland, ME
Projected timing of worst conditions: Midday Sunday through Sunday night
Approximate hours with Tropical storm force winds: 12 Hours
Major Hazards: 2 to 4 inches of rain
Storm surge of 1-2 ft.