The tail end of a prefrontal boundary pushed into the local area during the early morning, bringing unstable weather conditions. Favorable upper level wind flow combined with the sea breeze to produced numerous showers and thunderstorms across the San Juan metropolitan area. Very heavy rains lead to significant rainfall accumulations and runoff in a short period of time, producing flash flooding. Many local roads were impassable for several hours and some rivers in the San Juan area metro area overflowed their banks. Flooded homes and automobiles were reported, and some ground floor stores in the San Patricio area of Guaynabo. The flooding along the river Rio Piedras in the San Juan Metro Area was extreme as motorists were forced to abandon their cars on flooded roadways. According to preliminary USGS data, the Rio Piedras river exceeded flood stage at the El Senorial and Hato Rey locations. The Hato Rey USGS precipitation sensor recorded close to 3.5 inches between 1230 and 1530 AST. Las Curias at Damsite near Rio Piedras recorded 4.44 inches between 1315 and 1645 AST.

Flash Flood in SAN JUAN, PUERTO RICO
From 15-NOV-09 14:46:00 to 15-NOV-09 17:30:00 (AST-4)
Location: SAN JUAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

John F. Kennedy Avenue was reported flooded.

Flash Flood in SAN JUAN, PUERTO RICO
From 15-NOV-09 16:39:00 to 15-NOV-09 18:30:00 (AST-4)
Location: SAN JUAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flooding was reported along the Jesus T. Pineiro Avenue in front of the Luis Munoz Marin Park.

Heavy Rain in SAN JUAN, PUERTO RICO
From 15-NOV-09 13:36:00 to 15-NOV-09 16:30:00 (AST-4)
Location: SAN JUAN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Road flooding was reported at the intersection of Andalucia street and Roosevelt Avenue.

Heavy Rain in SAN JUAN, PUERTO RICO
From 15-NOV-09 14:21:00 to 15-NOV-09 16:30:00 (AST-4)
Location: SAN JUAN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Road flooding was reported along road 199 marginal, at the entrance of Borinquen Gardens neigborhood.

Flash Flood in GUAYNABO, PUERTO RICO
From 15-NOV-09 14:00:00 to 15-NOV-09 16:00:00 (AST-4)
Location: GUAYNABO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

San Patricio Shopping center was closed due to flooded waters at least 6 feet deep in some areas.

Flash Flood in GUAYNABO, PUERTO RICO
From 15-NOV-09 13:20:00 to 15-NOV-09 17:30:00 (AST-4)
Location: GUAYNABO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Small stream adjacent to Gonzalez Giusti Avenue overflowed its banks and flooded the Party City store parking area in San Patricio. People were stranded in their vehicles.

Heavy Rain in GUAYNABO, PUERTO RICO
From 15-NOV-09 13:16:00 to 15-NOV-09 16:16:00 (AST-4)
Location: GUAYNABO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Street flooding was reported along Meadow lane, Garden Hills, in Guaynabo.

Flash Flood in GUAYNABO, PUERTO RICO
From 15-NOV-09 14:00:00 to 15-NOV-09 16:00:00 (AST-4)
Location: GUAYNABO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Homes flooded in Mariquita sector. Highway 199 flooded and impassable.

Flash Flood in SAN JUAN, PUERTO RICO
From 15-NOV-09 13:17:00 to 15-NOV-09 17:30:00 (AST-4)
Location: SAN JUAN
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

High rainfall runoff along the northern De Diego Avenue in Puerto Nuevo combined with the Puerto Nuevo river overflow, flooding the northern end of De Diego Avenue, under the PR-22 bridge underpass. An automobile and its two occupants were stranded.

Flash Flood in GUAYNABO, PUERTO RICO
From 15-NOV-09 13:33:00 to 15-NOV-09 17:30:00 (AST-4)
Location: GUAYNABO
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Low lying areas under the Martinez Nadal Highway bridge at the intersection of Ortegon street in the San Patrico area were flooded. An automobile and its occupants were stranded.

Flash Flood in GUAYNABO, PUERTO RICO
From 15-NOV-09 14:03:00 to 15-NOV-09 18:30:00 (AST-4)
Location: GUAYNABO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Road flooding was reported along Tabonuco Street, San Patricio.

Flash Flood in GUAYNABO, PUERTO RICO
From 15-NOV-09 14:03:00 to 15-NOV-09 18:30:00 (AST-4)
Location: GUAYNABO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Road flooding was reported along Tabonuco Street, San Patricio.

Flash Flood in SAN JUAN, PUERTO RICO
From 15-NOV-09 14:39:00 to 15-NOV-09 16:30:00 (AST-4)
Location: SAN JUAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Road flooding was reported along Escorial Street, Caparra heights in San Juan.

Flash Flood in SAN JUAN, PUERTO RICO
From 15-NOV-09 16:27:00 to 15-NOV-09 18:30:00 (AST-4)
Location: SAN JUAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Road flooding was reported on Columbia street, University Gardens, Rio Piedras.

Heavy Rain in CULEBRA, PUERTO RICO
From 16-NOV-09 01:30:00 to 16-NOV-09 10:30:00 (AST-4)
Location: CULEBRA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A resident of Culebra Island indicated through an on-line web site that since 1:30 am the island had received 9.60 inches of rain, and that at times the rain was falling at rates faster than two inches an hour. He also indicated the soil was saturated, and the run-off was turning the bay an ugly brown.

Flash Flood in SAN JUAN, PUERTO RICO
From 15-NOV-09 14:29:00 to 15-NOV-09 16:30:00 (AST-4)
Location: SAN JUAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Road flooding was reported along Roosevelt Avenue in front of the Police Headquarters.

Heavy Rain in VEGA ALTA, PUERTO RICO
From 15-NOV-09 15:00:00 to 15-NOV-09 15:00:00 (AST-4)
Location: VEGA ALTA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Small stream Quebrada Honda was reported over Highway 2 in Vega Alta.

Flash Flood in GUAYNABO, PUERTO RICO
From 15-NOV-09 13:14:00 to 15-NOV-09 15:30:00 (AST-4)
Location: GUAYNABO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Urban flooding of low lying areas along Highway 2, at Barrio Juan Domingo, near Fort Buchanan, in front Shelys Pizza was reported. One automobile and its occupants were stranded.