Tropical Storm Danny (2009)

Basin

North Atlantic

Dates

August 26, 2009 to August 29, 2009

Peak strength

Tropical Storm, 50 kt (58 mph)

Lowest pressure

1006 mb (29.71 inHg)

Landfall

No; closest approach 428 km (266 mi)

Accumulated cyclone energy

2.0

Tropical-storm-force wind reached

180 nmi (333 km, 207 mi) from the center at its widest

Eyewall radius at its peak

100 nmi (185 km, 115 mi)

Overall size

180 nmi (333 km, 207 mi) to the outermost closed isobar

Peak gust in the best track

60 kt (69 mph)

Fastest the center moved

13 kt (15 mph)

Identifier

AL052009

The sources count different things and are not added together.

NOAA’s Storm Events database, the record National Weather Service offices compile months after a storm, as compiled March 2026.

Deaths

0 (0 direct, 0 indirect)

Injuries

1

Property damage

$200,000

Crop damage

none recorded

Events recorded

36 in 10 reports from 8 states and marine areas

State by state

What was recorded

15 flash flood, 7 high surf, 5 rip current, 4 flood, 4 high wind, 1 marine high wind.

The strongest winds National Weather Service offices recorded with this storm. An estimated figure is a forecaster’s judgment from the damage, not an instrument reading.

From the Storm Events narratives, unedited.

Three people rescued and two cars pulled from flood waters flowing over the intersection of U.S. Hwy. 40 and Route 7. Rainfall total of 7.25 inches reported on Aberdeen Proving Ground.

Harford, Maryland · Flash Flood · Aug 28, 05:30 UTC

Gunpowder River out of it banks onto Grave Run Road around River Road Ranch. River Road Ranch inundated, with damage to buildings. Vehicles washed into and down the river from flash flooding. Spotter reported rainfall total of 6.46.

Carroll, Maryland · Flash Flood · Aug 29, 01:40 UTC

Five cars were stranded in high water under the railroad overpass on Broadway at Zink Pl. in Fairlawn. Local authorities rescued one driver from their vehicle that filled with water.

Bergen, New Jersey · Flash Flood · Aug 29, 11:50 UTC

Two to four inches of rain fell across Bristol County, resulting in minor street flooding. In Dartmouth, Russell Mills and Horseneck Roads were flooded and impassable and Old Westport Road was flooded with six inches of water. River Road near Sylvia Street in New Bedford was closed due to flooding. Stafford Square in Fall River was flooded with water two and a half feet deep and the westbound lane of Roebson Street was flooded.

Bristol, Massachusetts · Flood · Aug 29, 18:32 UTC

A measuring site run by the Cape Wind project, in the area of Nantucket Sound known as Horseshoe Shoals, measured a wind gust of 61 mph. This anemometer is located 66 feet above mean sea level. National Weather Service Automated Surface Observing System (ASOS) anemometers are typically located 33 feet above ground level.

Nantucket Sound, Atlantic North · Marine High Wind · Aug 29, 19:51 UTC

The intersection of Green and Bridge Streets was flooded over the sidewalks in Fairhaven. Portions of Cranberry Highway were flooded with six to eight inches of water, rendering it impassable.

Plymouth, Massachusetts · Flood · Aug 29, 19:55 UTC

Heavy rains...with rainfall rates of 1.0 to 2.0 inches per hour...produced street flooding in Bar Harbor. The intersection of West Street and Main Street was closed due to flooding...with traffic re-routed. Flooding was also reported along other portions of West Street which was closed due to flooding.

Hancock, Maine · Flood · Aug 30, 02:00 UTC

Trees were toppled in Eastport by wind gusts estimated at 60 mph. Several boats in the harbor were also torn from their moorings by the winds...with one boat damaged.

Coastal Washington, Maine · High Wind · Aug 30, 02:30 UTC

Runoff from the heavy rain that fell in the northwestern part of Philadelphia caused minor flooding along the Frankford Creek. The Frankford Creek at Castor Avenue was above its 7 foot flood stage for six minutes from 1044 p.m. EDT through 1050 p.m. EDT on the 29th. It crested at 7.15 feet at 1045 p.m. EDT. Doppler Radar storm total estimates in the northwestern part of Philadelphia reached 2.5 inches.

Philadelphia, Pennsylvania · Flood · Aug 30, 02:44 UTC

Thunderstorms with torrential downpours caused flash flooding within Upper Darby Township. Motorists were rescued from flooded vehicles on Marshall Street and Normandy Roads. A family was trapped in a flooded basement on Ashton Street. A Skywarn Spotter measured 2.62 inches of rain in the township.

Delaware, Pennsylvania · Flash Flood · Aug 30, 03:00 UTC

Thunderstorms with torrential downpours caused flash flooding within the city of Camden and Pennsauken Township. Many streets were flooded in both municipalities. In Camden, basements were flooded in ten homes. Water rescues from vehicles were performed. Flooding was extensive on U.S. Route 130. A trained Skywarn Spotter in Pennsauken measured 4.14 inches of rain.

Camden, New Jersey · Flash Flood · Aug 30, 03:45 UTC

• Unnamed tropical depressionNorth Atlantic · 2009Tropical Depression30 kt · 1006 mb
• Tropical Storm AnaNorth Atlantic · 2009Tropical Storm35 kt · 1003 mb
• Hurricane BillNorth Atlantic · 2009 · 2 deaths · $46 millionCat 4115 kt · 943 mb
• Tropical Storm ClaudetteNorth Atlantic · 2009Tropical Storm50 kt · 1005 mb
• Tropical Storm ErikaNorth Atlantic · 2009Tropical Storm45 kt · 1004 mb
• Hurricane FredNorth Atlantic · 2009Cat 3105 kt · 958 mb
• Unnamed tropical depressionNorth Atlantic · 2009Tropical Depression30 kt · 1008 mb
• Tropical Storm GraceNorth Atlantic · 2009Tropical Storm55 kt · 986 mb
• Tropical Storm HenriNorth Atlantic · 2009Tropical Storm45 kt · 1005 mb
• Hurricane IdaNorth Atlantic · 2009Cat 290 kt · 975 mb

A best track is the record a warning agency settles on after the storm, not what it said at the time: position, maximum sustained wind and central pressure every six hours, revised against every observation that came in later. Category is the Saffir-Simpson scale, which runs from Category 1 at 64 kt to Category 5 at 137 kt and reads wind only, so it says nothing about surge or rain. Accumulated cyclone energy adds up the square of the wind through the storm's life, so it counts strength and duration together.

Storm history from NOAA NCEI’s International Best Track Archive for Climate Stewardship (IBTrACS), which merges the official best track of every warning agency. Live storms, cones, watches and warnings from the National Hurricane Center and the Central Pacific Hurricane Center. Archived radar from NOAA’s Level II archive.

• Tropical cyclone report, National Hurricane Center
• Every advisory and discussion NHC issued while it was live
• Wikipedia article: Tropical Storm Danny