Hurricane Maria (2011)

Basin

North Atlantic

Dates

September 6, 2011 to September 16, 2011

Peak strength

Category 1, 70 kt (81 mph)

Lowest pressure

983 mb (29.03 inHg)

Landfall

Yes

Accumulated cyclone energy

9.2

Tropical-storm-force wind reached

300 nmi (556 km, 345 mi) from the center at its widest

Hurricane-force wind reached

60 nmi (111 km, 69 mi) from the center at its widest

Eyewall radius at its peak

25 nmi (46 km, 29 mi)

Overall size

240 nmi (444 km, 276 mi) to the outermost closed isobar

Peak gust in the best track

85 kt (98 mph)

Fastest the center moved

49 kt (56 mph)

Identifier

AL142011

The sources count different things and are not added together.

Landfall points the US agencies flagged in the best track. The nearest town is named from the site’s gazetteer, not from the report.

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

0

Property damage

$1.4 million

Crop damage

none recorded

Events recorded

15 in 1 reports from 1 states and marine areas

State by state

What was recorded

7 flash flood, 6 heavy rain, 2 flood.

From the Storm Events narratives, unedited.

Flood waters covered many sections of Patillas municipality. Two low crossing bridges at Barrio Marin, Los Barros sector collapsed, and several homes were isolated. Another bridge collapsed at Barrio Cacaboa, Los Pompos sector isolating eight homes, and at Barrio Icacos La Mula sector. Rivers Marin, Providencia and Los Pollos were reported out of their banks, flooding seven homes in the Providencia neighborhood.

Patillas, Puerto Rico · Flood · Sep 12, 20:00 UTC

Several homes were flooded with mud and water in the communities of Manzanilla and Aruz when Lake Guayabal gates opened. Roads PR 1 and 149 where rendered impassable. Flooding was also reported at Plaza Mall Juana Diaz, Barriada Frazer, and sevral other neighborhoods like Del Carmen, Parcelas Guayabal, , and at Hermanos Santiago. Thirteen persons were in shelters due to the floods.

Juana Diaz, Puerto Rico · Flash Flood · Sep 13, 16:01 UTC

• Tropical Storm ArleneNorth Atlantic · 2011Tropical Storm55 kt · 993 mb
• Tropical Storm BretNorth Atlantic · 2011Tropical Storm60 kt · 995 mb
• Tropical Storm CindyNorth Atlantic · 2011Tropical Storm60 kt · 994 mb
• Tropical Storm DonNorth Atlantic · 2011Tropical Storm45 kt · 997 mb
• Tropical Storm EmilyNorth Atlantic · 2011Tropical Storm45 kt · 1003 mb
• Tropical Storm FranklinNorth Atlantic · 2011Tropical Storm40 kt · 1004 mb
• Tropical Storm GertNorth Atlantic · 2011Tropical Storm55 kt · 1000 mb
• Tropical Storm HarveyNorth Atlantic · 2011Tropical Storm55 kt · 994 mb
• Hurricane IreneNorth Atlantic · 2011 · 56 deathsCat 3105 kt · 942 mb
• Unnamed tropical depressionNorth Atlantic · 2011Tropical Depression30 kt · 1006 mb
• Tropical Storm JoseNorth Atlantic · 2011Tropical Storm40 kt · 1006 mb
• Hurricane KatiaNorth Atlantic · 2011Cat 4120 kt · 942 mb
• Unnamed tropical stormNorth Atlantic · 2011Tropical Storm40 kt · 1002 mb
• Tropical Storm LeeNorth Atlantic · 2011Tropical Storm50 kt · 986 mb
• Hurricane NateNorth Atlantic · 2011Cat 165 kt · 994 mb
• Hurricane OpheliaNorth Atlantic · 2011Cat 4120 kt · 940 mb
• Hurricane PhilippeNorth Atlantic · 2011Cat 180 kt · 976 mb
• Hurricane RinaNorth Atlantic · 2011Cat 3100 kt · 966 mb
• Tropical Storm SeanNorth Atlantic · 2011Tropical Storm55 kt · 982 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
• Best track as KMZ, National Hurricane Center
• Wikipedia article: Hurricane Maria