In the early hours of Tuesday, September 3, Hurricane Dorian had been stationary over the island of Grand Bahama for 18 hours, most of the time as a category 5 hurricane. A generic classification for lee waves, mountains waves, and many other waves that form in the atmosphere. This was followed by a another EF0 tornado in the Burnt Mill Creek area at 6:17 a.m., an EF0 tornado in the Brookfield neighborhood near Gordon Road at 6:39 a.m., and finally an EF1 tornado that moved … Two Hurricanes, Irma and Maria each reached category 5 strength. September 10 is the day you're statistically most likely to find a tropical cyclone somewhere in the Atlantic basin. For updated forecasts. Mesovortices are small-scale rotational features found in convective storms, such as found in the eyewall of tropical cyclones. Along the Outer Banks, businesses were closed and everyone was ordered to evacuate. A westward motion is then anticipated by the end of the weekend. An aerial view of damage and flooding caused by Hurricane Dorian on Great Abaco Island in the Bahamas on September 4, 2019. Karen was moving toward the north near 15 mph (24 kph). Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. Hurricane Lorenzo may be remembered as the most unique storm of 2019. Sep. 30, 2019 – NASA-NOAA’s Suomi NPP Analyzes Record-Setting Hurricane Lorenzo Over the weekend of Sept. 28 and 29, Hurricane Lorenzo attained Category 5 strength briefly, becoming the strongest hurricane on record in the eastern-most Atlantic Ocean. Conversely, if it becomes less rounded or elongated, like Karen, it is a sign the storm is weakening. Lorenzo has also attained and contributed to some other significant statistics. On the forecast track, the center of Lorenzo is expected to pass near the western Azores early on Wednesday, Oct. 2. NASA’s Goddard Space Flight Center. That is about 715 miles (1,155 km) west of the southernmost Cabo Verde islands. — Nick Hague (@AstroHague) September 2, 2019 SPECIFIC CONDITIONS PLAYED A PART IN ACTIVE SEASON On Sept. 28, a distant Lorenzo exploded to a Cat 5 cyclone about 1,400 miles southwest of the Azores. GPM found heavy rain falling at a rate greater than 1.6 inches (40 millimeters) southwest of Karen’s center over the Atlantic Ocean and just north of central Puerto Rico. Forecasters at the Joint Typhoon Warning Center expect 19W will move west-northwest and strengthen, then turn north and move east of Taiwan. Hurricane Florence was a long-lived tropical cyclone that brought devastating flooding to the Carolinas in September 2018. Karen is moving toward the north-northeast near 14 mph (22 kph), and this motion is expected to continue with a decrease in forward speed through this evening. NPP also showed a cloud-filled eye with clouds expanding to the northern quadrant. The VIIRS image showed the storm had already developed some strong thunderstorms around its center with a band of strong storms feeding into the center from the southeast. The hardest hit islands were Abaco and Grand Bahama in the north-western section of the country. September Is Peak Hurricane Season. All of them are under a watch from Lorenzo. Narda formed as Tropical Depression 16E on Saturday, Sept. 28 and intensified into a tropical storm late in the day. As storms go higher, it is an indication that the storm is strengthening. NHC said, “Large swells spreading across much of the northern Atlantic basin. Hurricane Dorian was the fourth named storm, second hurricane, and first major hurricane of the 2019 Atlantic hurricane season. The VIIRS image showed powerful thunderstorms circling the center of Lorenzo with thick bands of thunderstorms wrapping into the low-level center from the south and east of center. Karen is then expected to slow down and make a clockwise loop over the southwestern Atlantic into the weekend.”. Hurricane Dorian - August 31-September 9, 2019 An active tropical wave moved across western Africa on August 19th. The MODIS image showed the cyclone continues to produce strong thunderstorms around its cloud-filled eye. Sep. 04, 2019 – NASA Estimates Hurricane Dorian’s Massive Bahama Rainfall Totals Hurricane Dorian dropped excessive rainfall on the Bahamas and NASA calculated the rainfall the storm generated. Tropical storm-force winds extend outward up to 45 miles (75 km) from the center. By 11 p.m. EDT, infrared imagery showed a small eye had been appearing intermittently. Hurricane-force winds extend outward up to 45 miles (75 km) from the center and tropical-storm-force winds extend outward up to 265 miles (425 km). September 2019 East Pacific Tropical Cyclones; Name Dates of winds >39 mph Maximum Sustained Winds Minimum Central Pressure; Hurricane Juliette (Cat. NASA research has shown that storms with cloud tops that cold have been found to generate heavy rainfall. Lorenzo is a large hurricane. Hagibis was just the third category 5 tropical cyclone globally in 2019 (Super Typhoon Wutip and Hurricane Dorian were the others). The eleventh tropical cyclone and ninth named storm of the 2019 Atlantic hurricane season, Imelda formed out of an upper-level low that developed in the Gulf of Mexicoand moved westward. The estimated minimum central pressure is 957 millibars. NOAA’s National Hurricane Center (NHC) forecasters cited that data in their Discussion at that time. The previous record-holder was Hurricane Hugo (1989), which reached that intensity at 54.6°W. On September 3, Dorian resumed a northward track that paralleled the coast from Cape Canaveral to Cape Hatteras. Weakening is forecast by the weekend, and Karen is expected to become a remnant low by Sunday, Sept. 29. On Sept. 30, the Moderate Imaging Spectroradiometer or MODIS instrument that flies aboard NASA’s Terra satellite provided a visible image of Mitag. NASA’s Terra satellite captured an image of Typhoon Mitag’s cloud-filled eye, located east of Taiwan. It also had the lowest air pressure east of 50 degrees west longitude when the pressure dropped to 925 millibars. It developed into a tropical storm on September 23 just one day after its parent easterly wave emerged from African coast. Little development occurred until the system was near the Texas coastline, where it rapidly developed into a tropical storm before moving ashore shortly … Narda is moving toward the northwest near 15 mph (24 kph), and this general motion is expected to continue with some decrease in forward speed during the next couple of days. 2019 Hurricane Season Summary. Powerful bands of thunderstorms were swirling into the low-level center from the eastern side of the storm. Both of these observations support the NHC Forecast Discussion at 5 a.m. EDT (0900 UTC). This satellite image obtained from NOAA/RAMMB, shows Hurricane Lorena on September 19, 2019 as it made landfall on the southwest coast of Mexico The estimated minimum central pressure is 1003 millibars. On Sept. 26, Lorenzo attained status as a major hurricane. On Sept. 25 at 0312 UTC (Sept. 24 at 11:12 p.m. EDT) a large area of powerful thunderstorms circled the eye where cloud top temperatures were as cold as minus 121 Fahrenheit (minus 85 degrees Celsius). The Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard Suomi NPP provided an infrared image of the storm. However, many were weak and short-lived, especially towards the end of the season. Lorenzo is moving toward the west-northwest near 17 mph (28 kph), and this motion is expected to continue through Thursday. NWS doppler radar imagery from September 1-6, 2019 showing Hurricane Dorian affecting the Southeast U.S. Overview Hurricane Dorian tracked northward off the Georgia coast and then north-northeast just off the South Carolina coast on September 4-5 while intensifying to a Category 3 hurricane with maximum sustained winds near 115 mph (see loop of the Weather Prediction Center's surface analyses below). A turn toward the northwest is expected late Thursday. Other years with more than one Cat 5 storm include 1932, 1933, 1961, 2005, 2007 and 2017. Lorenzo is moving toward the north-northwest near 14 mph (22 km/h), and this general motion is forecast to continue today. Karen’s center had moved further away from Puerto Rico since the GPM image was collected and was located about 240 miles (385 km) north-northwest of San Juan, Puerto Rico. The satellite imagery revealed that Lorenzo was getting better organized as it was strengthening. Lorenzo, as a Category 4 hurricane has a long reach with ocean swells. NOAA’s National Hurricane Center or NHC said at 5 a.m. EDT (0900 UTC), the center of Tropical Storm Karen was located near latitude 28.3 degrees north and longitude 61.2 degrees west. The shape of the storm is a clue to forecasters that a storm is either strengthening or weakening. The Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard Suomi NPP provided infrared data on Lorenzo. At 5 a.m. EDT (0900 UTC), on Sept. 27 the center of Hurricane Lorenzo was located near latitude 18.6 degrees north and longitude 42.1 degrees west. Conversely, if over a period of time, satellite data shows cloud tops falling and warming, it is an indication the storm is weakening because there’s not as strong an uplift or rising air in the storm. It formed in the Main Development Region to the east of the Windward Islands. Tropical cyclones are made up of hundreds of thunderstorms. At 0300Z on  September 30 (11 p.m. EDT on Sept. 29), the National Hurricane Center or NHC Public advisory  stated that Hurricane Lorenzo had winds of 110 mph, making it just barely a Category 3 hurricane. The slightly ragged but clearing eye of the hurricane is surrounded by very cold cloud tops, and it has become clear that Lorenzo is rapidly intensifying. At 5 a.m. EDT (0900 UTC), Typhoon Mitag had maximum sustained winds near 75 knots. The Terra satellite cloud height and temperature data was provided by NASA’s Worldview product at NASA’s Goddard Space Flight Center, Greenbelt, Md. Heavy rain was also falling at more than 1 inch (25 mm) per hour over much of Puerto Rico and extended far to the north of Karen’s center into the Atlantic. Hurricane Dorian was the first major hurricane of the 2019 Atlantic Hurricane Season. The estimated minimum central pressure is 937 mb (27.67 inches). Maximum sustained winds are near 40 mph (65 kph) with higher gusts. The center of Tropical Storm Narda was located near latitude 22.5 degrees north and longitude 106.4 degrees west. Humberto formed on September 13 from the prolonged interaction of a tropical wave and an upper-level trough, then paralleled the eastern coastline of Floridathrough September 16 bef… The 2019 hurricane season hit hard. Weakening should begin by Tuesday as Narda interacts with the mountains of western Mexico. Hurricane Humberto was a large and powerful tropical cyclone that caused extensive wind damage in the British Overseas Territory of Bermuda during September 2019. It was the eighth named storm, third hurricane, and second major hurricane – Category 3 or higher on the Saffir–Simpson scale – of the 2019 Atlantic hurricane season. The estimated minimum central pressure is 1000 millibars. On September 26, it rapidly intensified into a Terra data also found that cloud top temperatures were as cold as or colder than 200 Kelvin (minus 99.6 degrees Fahrenheit/minus 73.1 degrees Celsius) in those storms. On Sept. 26, the Moderate Imaging Spectroradiometer or MODIS instrument that flies aboard NASA’s Terra satellite provided a visible image of Lorenzo as a major hurricane. "We're on our own." The storm is forecast to graze the east coast of China, south of Shanghai, and then turn northeast. The twelfth named storm, fifth hurricane, third major hurricane and second Category 5 hurricane of the 2019 Atlantic hurricane season, Lorenzo developed from a tropical wave that moved off the west coast of Africa on 22 September, growing larger in size over the course of its development. By 6 a.m. EDT (1000 UTC), the center of Hurricane Lorenzo had maximum sustained winds have rapidly increased to near 125 mph (205 kph) with higher gusts. 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