paragraph_text: Hurricane Maria is regarded as being the worst natural disaster on record to affect Dominica and Puerto Rico, and is also the deadliest Atlantic hurricane since Hurricane Jeanne in 2004. The tenth-most intense Atlantic hurricane on record and the most intense tropical cyclone worldwide in 2017, Maria was the thirteenth named storm, eighth consecutive hurricane, fourth major hurricane, second Category 5 hurricane, and the deadliest storm of the hyperactive 2017 Atlantic hurricane season. At its peak, the hurricane caused catastrophic damage and numerous fatalities across the northeastern Caribbean, compounding recovery efforts in the areas of the Leeward Islands already struck by Hurricane Irma. Total losses from the hurricane are estimated at upwards of $91.61 billion (2017 USD), mostly in Puerto Rico, ranking it as the third - costliest tropical cyclone on record.

paragraph_text: Originating from a tropical wave, Maria became a tropical storm on September 16, east of the Lesser Antilles. Highly favorable environmental conditions allowed the storm to undergo explosive intensification as it approached the island arc. The hurricane reached Category 5 strength on September 18 just before making landfall on Dominica, becoming the first Category 5 hurricane on record to strike the island. After weakening slightly due to crossing Dominica, Maria achieved its peak intensity over the eastern Caribbean with maximum sustained winds of 175 mph (280 km / h) and a pressure of 908 mbar (hPa; 26.81 inHg), making it the tenth-most intense Atlantic hurricane on record. On September 20, an eyewall replacement cycle took place, weakening Maria to a high - end Category 4 hurricane by the time it struck Puerto Rico. Interaction with land further weakened the hurricane, though it regained some strength as it moved northeast of The Bahamas. Moving slowly to the north, Maria gradually degraded and weakened to a tropical storm on September 28. Embedded in the westerlies, Maria accelerated toward the east and later east - northeast over the open Atlantic, becoming extratropical on September 30 and dissipating by October 3.

paragraph_text: After crossing Cuba near Menelao Mora, Hurricane Charley accelerated to the north - northeast, toward the southwest coast of Florida in response to the approach of an unseasonal mid-tropospheric trough. Charley passed over the Dry Tortugas at 1200 UTC on August 13, with maximum winds of about 110 mph (180 km / h). The strike occurred only 22 hours after Tropical Storm Bonnie made landfall on St. Vincent Island, marking the first time two tropical cyclones hit the same state within a 24 - hour period. Then Charley rapidly intensified, strengthening from a 110 mph (180 km / h) hurricane with a minimum central barometric pressure of 965 mbar (hPa; 28.50 inHg) to a 145 mph (233 km / h) hurricane with a pressure of 947 mbar (hPa; 27.96 inHg) in just three hours. It continued to strengthen as it turned more to the northeast, and made landfall near the island of Cayo Costa, Florida as a 150 mph (240 km / h) Category 4 hurricane with a pressure of 941 mbar (hPa; 27.79 inHg) at approximately 1945 UTC on August 13. An hour later, the hurricane struck Punta Gorda as a 145 mph (233 km / h) storm and then passed up through Port Charlotte. However, the eye had shrunk before landfall, limiting the most powerful winds to an area within 7 mi (11 km) of the center.

paragraph_text: The hurricane made its closest approach to St. Croix around 05: 00 UTC on September 20, passing within 20 mi (30 km) of the island; the storm's outer eyewall lashed the island while the more violent inner eye remained offshore. Hours later, around 08: 00 UTC, the outer eyewall struck Vieques, an island off the eastern coast of Puerto Rico. By this time, the outer eye became dominant as the inner one decayed, and the eyewall replacement cycle caused Maria to weaken to Category 4 strength. Maria made landfall just south of Yabucoa, Puerto Rico, around 10: 15 UTC with sustained winds of 155 mph (250 km / h), making it the strongest to hit the island since the 1928 San Felipe Segundo hurricane. Maria maintained a general west - northwest course across Puerto Rico, emerging over the Atlantic Ocean shortly before 18: 00 UTC. Interaction with the mountainous terrain resulted in substantial weakening; sustained winds fell to 110 mph (175 km / h) and the central pressure rose to 957 mbars (hPa; 28.26 inHg). With favorable environmental conditions, Maria steadily reorganized as it moved away from Puerto Rico. A large eye, 45 mi (75 km) wide, developed with deep convection blossoming around it. Early on September 21, the system regained Category 3 intensity.

paragraph_text: October 2 - 5, 2015 -- Hurricane Joaquin, at one point forecast to make a landfall in New England, eventually passed offshore and produced high surf along Cape Cod and Nantucket.

paragraph_text: The storm made landfall on Puerto Rico on Wednesday, September 20 as a Category 4 hurricane with winds of 155 mph. A sustained wind of 64 mph (103 km / h) with a gust to 113 mph (182 km / h) was reported in San Juan, Puerto Rico, immediately prior to the hurricane making landfall on the island. After landfall, wind gusts of 109 mph (175 km / h) were reported at Yabucoa Harbor and 118 mph (190 km / h) at Camp Santiago. In addition, very heavy rainfall occurred throughout the territory, peaking at 37.9 in (962.7 mm) in Caguas. Widespread flooding affected San Juan, waist - deep in some areas, and numerous structures lost their roof. The coastal La Perla neighborhood of San Juan was largely destroyed. Cataño saw extensive damage, with the Juana Matos neighborhood estimated to be 80 percent destroyed. The primary airport in San Juan, the Luis Muñoz Marín International Airport, was slated to reopen on September 22.

paragraph_text: Increased interest in modern a cappella (particularly collegiate a cappella) can be seen in the growth of awards such as the Contemporary A Cappella Recording Awards (overseen by the Contemporary A Cappella Society) and competitions such as the International Championship of Collegiate A Cappella for college groups and the Harmony Sweepstakes for all groups. In December 2009, a new television competition series called The Sing-Off aired on NBC. The show featured eight a cappella groups from the United States and Puerto Rico vying for the prize of $100,000 and a recording contract with Epic Records/Sony Music. The show was judged by Ben Folds, Shawn Stockman, and Nicole Scherzinger and was won by an all-male group from Puerto Rico called Nota. The show returned for a second and third season, won by Committed and Pentatonix, respectively.

paragraph_text: June 21 -- 22 - Tropical Storm Cindy brought floods in Florida Panhandle and a EF0 tornado was reported in Fort Walton Beach July 31 - Tropical Storm Emily made landfall in Florida with winds of 45 mph (75 km / h). Emily also brought heavy rain to the state September 10 -- 11 - Hurricane Irma makes landfall on Cudjoe Key as a Category 4 hurricane with sustained winds of 130 mph (215 km / h), then makes a second landfall on Marco Island with winds of 115 mph (185 km / h). It is the strongest hurricane in terms of windspeed to hit the state since Charley in 2004, and the most intense in terms of pressure since Andrew in 1992. Irma has killed at least 82 people in the state. October 29 -- Tropical Storm Philippe makes landfall in the Everglades, causing minimal damage. Moderate rainfall was reported.

paragraph_text: Most intense landfalling Atlantic hurricanes Intensity is measured solely by central pressure Rank Hurricane Season Landfall pressure ``Labor Day ''1935 892 mbar (hPa) Gilbert 1988 900 mbar (hPa) Camille 1969 Dean 2007 905 mbar (hPa) 5`` Cuba'' 1924 910 mbar (hPa) 6 Janet 1955 914 mbar (hPa) Irma 2017 8 Maria 2017 917 mbar (hPa) 9 ``Cuba ''1932 918 mbar (hPa) 10 Katrina 2005 920 mbar (hPa) Sources: Atlantic Hurricane Best Track Data Documentation of Atlantic Tropical Cyclones National Hurricane Center

paragraph_text: Hurricane Irene was a large and destructive tropical cyclone which affected much of the Caribbean and East Coast of the United States during late August 2011. Irene is ranked as the ninth - costliest hurricane in United States history. The ninth named storm, first hurricane, and first major hurricane of the 2011 Atlantic hurricane season, Irene originated from a well - defined Atlantic tropical wave that began showing signs of organization east of the Lesser Antilles. Due to development of atmospheric convection and a closed center of circulation, the system was designated as Tropical Storm Irene on August 20, 2011. After intensifying, Irene made landfall in St. Croix as a strong tropical storm later that day. Early on August 21, the storm made a second landfall in Puerto Rico. While crossing the island, Irene strengthened into a Category 1 hurricane. The storm paralleled offshore of Hispaniola, continuing to slowly intensify in the process. Shortly before making four landfalls in the Bahamas, Irene peaked as a 120 mph (190 km / h) Category 3 hurricane.

paragraph_text: Hurricane Irma was an extremely powerful and catastrophic Cape Verde - type hurricane, the strongest observed in the Atlantic in terms of maximum sustained winds since Wilma and the strongest storm on record to exist in the open Atlantic region. It was the first Category 5 hurricane to strike the Leeward Islands on record, followed by Hurricane Maria two weeks later, and is the second - costliest Caribbean hurricane on record, after Maria. The ninth named storm, fourth hurricane, second major hurricane, and first Category 5 hurricane of the 2017 Atlantic hurricane season, Irma caused widespread and catastrophic damage throughout its long lifetime, particularly in parts of the northeastern Caribbean and the Florida Keys. It was also the most intense Atlantic hurricane to strike the continental United States since Katrina in 2005, the first major hurricane to make landfall in Florida since Wilma in the same year and the first category 4 hurricane to landfall in the state since Charley in 2004.

paragraph_text: September 10 -- 11 - Hurricane Irma makes landfall on Cudjoe Key as a Category 4 hurricane with sustained winds of 130 mph (215 km / h), then makes a second landfall on Marco Island with winds of 115 mph (185 km / h). It is the strongest hurricane in terms of windspeed to hit the state since Charley in 2004, and the most intense in terms of pressure since Andrew in 1992. Irma has killed at least 82 people in the state.

paragraph_text: Since 1850, only seven tropical cyclones have brought gale - force winds to the Southwestern United States. They are: The 1858 San Diego hurricane that was reconstructed as just missing landfall in 1858, the 1939 Long Beach tropical storm that made landfall near San Pedro in 1939, the remnants of Tropical Storm Jennifer - Katherine in 1963, the remnants of Hurricane Emily in 1965, the remnants of Hurricane Joanne in 1972, the remnants of Hurricane Kathleen in 1976, and Hurricane Nora after being downgraded to a tropical storm in 1997.

paragraph_text: Jacksonville has suffered less damage from hurricanes than most other east coast cities, although the threat does exist for a direct hit by a major hurricane. The city has only received one direct hit from a hurricane since 1871; however, Jacksonville has experienced hurricane or near-hurricane conditions more than a dozen times due to storms crossing the state from the Gulf of Mexico to the Atlantic Ocean, or passing to the north or south in the Atlantic and brushing past the area. The strongest effect on Jacksonville was from Hurricane Dora in 1964, the only recorded storm to hit the First Coast with sustained hurricane-force winds. The eye crossed St. Augustine with winds that had just barely diminished to 110 mph (180 km/h), making it a strong Category 2 on the Saffir-Simpson Scale. Jacksonville also suffered damage from 2008's Tropical Storm Fay which crisscrossed the state, bringing parts of Jacksonville under darkness for four days. Similarly, four years prior to this, Jacksonville was inundated by Hurricane Frances and Hurricane Jeanne, which made landfall south of the area. These tropical cyclones were the costliest indirect hits to Jacksonville. Hurricane Floyd in 1999 caused damage mainly to Jacksonville Beach. During Floyd, the Jacksonville Beach pier was severely damaged, and later demolished. The rebuilt pier was later damaged by Fay, but not destroyed. Tropical Storm Bonnie would cause minor damage in 2004, spawning a minor tornado in the process. On May 28, 2012, Jacksonville was hit by Tropical Storm Beryl, packing winds up to 70 miles per hour (113 km/h) which made landfall near Jacksonville Beach.

paragraph_text: Hurricane Maria was regarded as the worst natural disaster on record in Dominica and Puerto Rico. The tenth-most intense Atlantic hurricane on record and the most intense tropical cyclone worldwide of 2017, Maria was the thirteenth named storm, eighth consecutive hurricane, fourth major hurricane, second Category 5 hurricane, and the deadliest storm of the hyperactive 2017 Atlantic hurricane season. At its peak, the hurricane caused catastrophic damage and numerous fatalities across the northeastern Caribbean, compounding recovery efforts in the areas of the Leeward Islands already struck by Hurricane Irma. Maria was the third consecutive major hurricane to threaten the Leeward Islands in two weeks, after Irma made landfall in several of the islands two weeks prior and Hurricane Jose passed dangerously close, bringing tropical storm force winds to Barbuda.

paragraph_text: The Tampa Bay hurricane of 1921 (also known as the 1921 Tarpon Springs hurricane) is the most recent major hurricane to strike the Tampa Bay Area. The eleventh tropical cyclone, sixth tropical storm, and fifth hurricane of the season, the storm developed from a trough in the southwestern Caribbean Sea on October 20. Initially a tropical storm, the system moved northwestward and intensified into a hurricane on October 22 and a major hurricane by October 23. Later that day, the cyclone peaked as a Category 4 on the modern day Saffir -- Simpson scale with maximum sustained winds of 140 mph (220 km / h). After entering the Gulf of Mexico, the hurricane gradually curved northeastward and weakened to a Category 3 before making landfall near Tarpon Springs, Florida, late on October 25, becoming the first major hurricane to hit the area since a hurricane in 1848. The storm quickly weakened to a Category 1 hurricane while crossing Central Florida, before reaching the Atlantic Ocean early on the following day. Thereafter, system moved east - southeastward and remained fairly steady in intensity before weakening to a tropical storm late on October 29. The storm was then absorbed by a larger extratropical cyclone early the next day, with the remnants of the hurricane soon becoming indistinguishable.

paragraph_text: Hurricane Harvey was an extremely destructive Atlantic hurricane which became the first major hurricane to make landfall in the United States since Wilma in 2005, ending a record 12 - year span in which no hurricanes made landfall at such an intensity in the country. In a four - day period, many areas received more than 40 inches (100 cm) of rain as the system slowly meandered over eastern Texas and adjacent waters, causing catastrophic flooding. With peak accumulations of 64.58 in (164.0 cm), Harvey is the wettest tropical cyclone on record in the United States. The resulting floods inundated hundreds of thousands of homes, displaced more than 30,000 people, and prompted more than 17,000 rescues.

paragraph_text: The storm originated over the Bahamas on August 23 from the interaction between a tropical wave and the remnants of Tropical Depression Ten. Early the following day, the new depression intensified into Tropical Storm Katrina. The cyclone headed generally westward toward Florida and strengthened into a hurricane only two hours before making landfall at Hallandale Beach and Aventura on August 25. After very briefly weakening to a tropical storm, Katrina emerged into the Gulf of Mexico on August 26 and began to rapidly deepen. The storm strengthened to a Category 5 hurricane over the warm waters of the Gulf of Mexico, but weakened before making its second landfall as a Category 3 hurricane on August 29, in southeast Louisiana.

paragraph_text: Severe weather occurs regularly in North Carolina. On the average, a hurricane hits the state once a decade. Destructive hurricanes that have struck the state include Hurricane Fran, Hurricane Floyd, and Hurricane Hazel, the strongest storm to make landfall in the state, as a Category 4 in 1954. Hurricane Isabel stands out as the most damaging of the 21st century. Tropical storms arrive every 3 or 4 years. In addition, many hurricanes and tropical storms graze the state. In some years, several hurricanes or tropical storms can directly strike the state or brush across the coastal areas. Only Florida and Louisiana are hit by hurricanes more often. Although many people believe that hurricanes menace only coastal areas, the rare hurricane which moves inland quickly enough can cause severe damage; for example, in 1989, Hurricane Hugo caused heavy damage in Charlotte and even as far inland as the Blue Ridge Mountains in the northwestern part of the state. On the average, North Carolina has 50 days of thunderstorm activity per year, with some storms becoming severe enough to produce hail, flash floods, and damaging winds.

paragraph_text: Hurricane Edith was the strongest hurricane to form during the 1971 Atlantic hurricane season and the southernmost landfalling Category 5 hurricane on record in the Atlantic until surpassed by Hurricane Felix of 2007. Edith developed from a tropical wave on September 5 and quickly strengthened into a hurricane in the Caribbean Sea. Edith rapidly intensified on September 9 and made landfall on Cape Gracias a Dios as a Category 5 hurricane on the Saffir - Simpson Hurricane Scale. It quickly lost intensity over Central America and after briefly entering the Gulf of Honduras it crossed the Yucatán Peninsula in Mexico. After moving across the Gulf of Mexico a trough turned the storm to the northeast and Edith, after having restrengthened while accelerating towards the coast, made landfall on Louisiana with winds of 105 mph (170 km / h) on September 16. Edith steadily weakened over land and dissipated over Georgia on September 18.

Question: when did Hurricane Maria make landfall in the country where groups not from the US came from in The Sing Off?
Answer: September 20