Hurricane Irene tracked up the Mid-Atlantic Coast during the evening hours of the 27th through the early morning hours of the 28th. Irene passed by just to the east of Ocean City, Maryland during the early morning hours of the 28th. The minimum central pressure was 958 millibars and maximum sustained winds were 80 mph, making Irene a category one hurricane. Irene produced tropical storm conditions across portions Maryland near and east of the Interstate 95 Corridor. The worst conditions were near the Chesapeake Bay.
The highest rainfall totals were around twelve inches across St Marys County. Widespread power outages were reported across eastern Maryland along with numerous trees down. Total damage from Irene was over 10 million dollars.

Tropical Storm in HOWARD, MARYLAND
From 27-AUG-11 15:00:00 to 28-AUG-11 09:00:00 (EST-5)
Property damage: 500.00K
Reported by: Emergency Manager

Several trees were down. A couple trees damaged homes. Route 40 in Ellicott City was blocked by storm debris.

Tropical Storm in MONTGOMERY, MARYLAND
From 27-AUG-11 15:00:00 to 28-AUG-11 09:00:00 (EST-5)
Property damage: 300.00K
Reported by: Emergency Manager

Several trees were down in Sligo Creek Park. One tree fell across a car. There was also a downed tree across a Temporary Classroom. Tree damage was also reported in Germantown.

Tropical Storm in PRINCE GEORGES, MARYLAND
From 27-AUG-11 14:00:00 to 28-AUG-11 09:00:00 (EST-5)
Property damage: 1.70M
Reported by: Emergency Manager

Hundreds of trees were down across the county. At least one tree fell onto a house and another fell onto a car. Power outages were in the tens of thousands.

Tropical Storm in ST. MARY'S, MARYLAND
From 27-AUG-11 12:00:00 to 28-AUG-11 09:00:00 (EST-5)
Property damage: 3.80M
Reported by: Emergency Manager

Hundreds of trees and power lines were down across the county. Numerous Roads were closed due to downed trees. An unknown number of trees fell onto homes and cars.

Tropical Storm in ANNE ARUNDEL, MARYLAND
From 27-AUG-11 13:00:00 to 28-AUG-11 09:00:00 (EST-5)
Property damage: 300.00K
Reported by: Emergency Manager

Hundreds of trees were down throughout the county. A couple hundred roads were closed due to downed trees, including US 50 near the Severn River Bridge and along Ritchie Highway in Severna Park. Numerous trees fell into homes. The total number of homes damaged was 58.

Tropical Storm in SOUTHERN BALTIMORE, MARYLAND
From 27-AUG-11 15:00:00 to 28-AUG-11 09:00:00 (EST-5)
Property damage: 200.00K
Reported by: Emergency Manager

Numerous trees were down throughout southern Baltimore County. A tree fell onto a house in the city of Baltimore. Roads were blocked due to downed trees in Bowleys Quarters and Catonsville. Hundreds of thousands were without power.

Tropical Storm in NORTHERN BALTIMORE, MARYLAND
From 27-AUG-11 16:00:00 to 28-AUG-11 09:00:00 (EST-5)
Property damage: 200.00K
Reported by: Emergency Manager

Numerous trees were down throughout northern Baltimore County.

Tropical Storm in CALVERT, MARYLAND
From 27-AUG-11 12:00:00 to 28-AUG-11 09:00:00 (EST-5)
Property damage: 1.80M
Reported by: Emergency Manager

Thousands of trees were down throughout the county. Major damage or destruction was reported to approximately 100 homes. Approximately 45,000 homes were without power. Numerous roads were blocked due to downed trees and a reactor at the Calvert Cliffs Power Plant was shut down after a piece of siding from another building blew onto it.

Tropical Storm in CARROLL, MARYLAND
From 27-AUG-11 16:00:00 to 28-AUG-11 09:00:00 (EST-5)
Property damage: 50.00K
Reported by: Emergency Manager

Dozens of trees and power lines were down across the county.

Tropical Storm in CHARLES, MARYLAND
From 27-AUG-11 12:00:00 to 28-AUG-11 09:00:00 (EST-5)
Property damage: 1.30M
Reported by: Emergency Manager

Hundreds of trees were down across the county. Some trees blocked roads and damaged cars.

Tropical Storm in FREDERICK, MARYLAND
From 27-AUG-11 16:00:00 to 28-AUG-11 09:00:00 (EST-5)
Property damage: 5.00K
Reported by: Emergency Manager

A few trees and power lines were down.

Tropical Storm in HARFORD, MARYLAND
From 27-AUG-11 16:00:00 to 28-AUG-11 09:00:00 (EST-5)
Property damage: 2.00M
Reported by: Emergency Manager

Hundreds of trees and power lines were down across the county. Numerous trees fell onto houses.