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. NPP also showed a cloud-filled eye with clouds expanding to the northern quadrant. A westward motion is then anticipated by the end of the weekend. Sep. 09, 2019 – NASA Estimates Hurricane Dorian’s Massive Rainfall Track On Monday morning, September 9, Hurricane Dorian was a post-tropical storm after a mid-latitude weather front and cold seas had altered its tropical characteristics over the weekend. A turn toward the north is then anticipated on Saturday, Sept. 28. On Sept. 30, the Moderate Imaging Spectroradiometer or MODIS instrument that flies aboard NASA’s Terra satellite provided a visible image of Mitag. Forecasters at NOAA’s National Hurricane Center or NHC incorporate the rainfall data into their forecasts. For updated forecasts. When NASA-NOAA’s Suomi NPP satellite passed over Lorenzo, it analyzed the storm again in infrared light. On Sept. 30, the Moderate Imaging Spectroradiometer or MODIS instrument that flies aboard NASA’s Aqua satellite provided a visible image of Narda. Weakening is forecast by the weekend, and Karen is expected to become a remnant low by Sunday, Sept. 29. The MODIS image revealed powerful thunderstorms around the eyewall, extending high into the troposphere. Later in the day, at 11 a.m. EDT (1500 UTC), the center of Hurricane Lorenzo was located near latitude 14.1 degrees north and longitude 35.1 degrees west. NASA research has shown that storms with cloud tops that cold have been found to generate heavy rainfall. They can do that because infrared data provides temperature information, and the strongest thunderstorms that reach highest into the atmosphere have the coldest cloud top temperatures. Author Lynn Jenner Posted on September 20, 2019 September 23, 2019 Categories Earth, Earth Hazards, Hurricanes Tags Imelda 2019 Tapah – Northwestern Pacific Ocean Sep. 19, 2019 – NASA Analyzes Rainfall Rates in New Tropical Storm Tapah 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… Tropical cyclones are made up of hundreds of thunderstorms. 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. The Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard Suomi NPP provided infrared data on Lorenzo. 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. Little development occurred until the system was near the Texas coastline, where it rapidly developed into a tropical storm before moving ashore shortly … These swells are likely to cause life-threatening surf and rip current conditions.”. NOAA National Centers for Environmental Information, State of the Climate: Tropical Cyclones for September 2019, published online October 2019, retrieved on December 13, 2020 from, https://www.ncdc.noaa.gov/sotc/tropical-cyclones/201909, November Global Release: Mon, 14 Dec 2020, 11:00 AM EST, https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.ncdc:C00775. Four tornadoes struck New Hanover County during the morning of September 5 as Hurricane Dorian approached from the south. Some strengthening is forecast during the next couple of days. NASA-NOAA’s Suomi NPP satellite passed over the Northwestern Pacific Ocean and provided forecasters at the Joint Typhoon Warning Center with a view of Tropical Depression 19W’s structure that helped confirm it is now a depression. Dropping cloud top temperatures from NASA-NOAA’s Suomi NPP satellite indicated Hurricane Lorenzo was getting stronger in the North Atlantic Ocean. Read CNN's 2019 Atlantic Hurricane Season Fast Facts to learn more about tropical storm systems that develop during the summer and autumn. That rising air helps thunderstorms develop. Visible satellite image of Hurricane Dorian at 12:30 pm EDT September 1, 2019. The estimated minimum central pressure is 1000 millibars. 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. 19W was centered near 14.4 degrees north latitude and 136.2 degrees east longitude. 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. NASA research has shown that storms with cloud top temperatures that cold can produce heavy rainfall. NASA’s Aqua satellite captured an image of Tropical Storm Narda along Mexico’s west coast in the Eastern Pacific Ocean. At 11 a.m. EDT (1500 UTC), the center of Tropical Storm Karen was located near latitude 26.6 degrees north and longitude 63.3 degrees west. Tropical Storm Imelda was the fifth-wettest tropical cyclone on record in the continental United States, causing devastating and record-breaking floods in southeast Texas. 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. Tropical Storm Karen has crossed over Puerto Rico and into the western Atlantic Ocean. The MODIS image showed the cyclone continues to produce a large area of deep convection near and to the west of its center. 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. The 1-5 scale estimates potential property damage. That is about 715 miles (1,155 km) west of the southernmost Cabo Verde islands. The Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard Suomi NPP provided a visible image of the storm on Sept. 25. Overall, the 2019 hurricane season had slightly more storm activity than expected, with more named tropical storms than normal, but a near-average number of hurricanes. The estimated minimum central pressure is 1003 millibars. Chihuahua…1 to 3 inches. Mesovortices are small-scale rotational features found in convective storms, such as found in the eyewall of tropical cyclones. Karen was centered about 405 miles (650 km) south-southeast of Bermuda. "We're on our own." National Aeronautics and Space Administration, At 0300Z on  September 30 (11 p.m. EDT on Sept. 29), the National Hurricane Center or NHC Public advisory, NASA Aids Disaster Response after Eta and Iota Hit Central America. It was located near 22.8 degrees north latitude and 123.0 degrees east longitude, about 161 nautical miles south-southeast of Taipei, Taiwan. At the time, Dorian was making landfall on Elbow Cay in The Bahamas with … NASA-NOAA’s Suomi NPP satellite provided a full visible image of a strengthening Hurricane Lorenzo in the eastern North Atlantic Ocean. 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. There have been 26 Category 5 storms since 1960 with Lorenzo being the latest. The estimated minimum central pressure is 955 millibars. A major hurricane is one that is a Category 3 or higher on the Saffir-Simpson Hurricane Wind Scale. 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 2019 hurricane season hit hard. The storm moved slowly to the West and strengthened along its route, reaching Cat. As storms go higher, it is an indication that the storm is strengthening. Two Hurricanes, Irma and Maria each reached category 5 strength. As the flooding worsened Friday morning, Warner told the AP in a phone conversation that "it's certainly a mess." NOAA’s National Hurricane Center (NHC) forecasters cited that data in their Discussion at that time. Lorenzo is forecast to turn toward the northwest and begin moving at a slightly slower speed later today. The center of Tropical Storm Karen was located near latitude 21.7 degrees north and longitude 64.9 degrees west. The Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard Suomi NPP provided an infrared image of the storm. After some modest weakening, Lorenzo rapidly intensified and briefly attained Category 5 status on September 29. Lorenzo, as a Category 4 hurricane has a long reach with ocean swells. Lorenzo has also attained and contributed to some other significant statistics. Tropical Storm Imelda was a prime example that it doesn't take a monstrous storm like Dorian to produce major impacts. Its post tropical remnants would ultimately bring strong winds and flooding to Ireland. Lorenzo set several records for being one of the strongest and longest-lived hurricanes recorded east of 45°W. September Is Peak Hurricane Season. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. The 2019 Atlantic hurricane season was the fourth consecutive above-average and damaging season dating back to 2016.It is tied with 1969 as the fifth-most active Atlantic hurricane season on record in terms of named storms, with 18 named storms and 20 tropical cyclones in total. On Sept. 30, warnings remain in effect for the Philippines as Mitag, known locally as Onyok, continues to move north and away from the country. Hagibis was just the third category 5 tropical cyclone globally in 2019 (Super Typhoon Wutip and Hurricane Dorian were the others). Maximum sustained winds have increased to near 85 mph (140 kph) with higher gusts. The 2019 Atlantic hurricane seasonruns from June 1 to November 30. Sep. 03, 2019 – NASA’s IMERG Estimates Hurricane Dorian’s Rain. 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. 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. The image showed the Karen has been maintaining a cluster of developing thunderstorms and convection to the west of center. On Sept. 26, shortly after 5 a.m. EDT (0900 UTC), the National Hurricane Center (NHC) said Lorenzo’s eye quickly and drastically became more apparent in conventional satellite imagery. Hurricane Humberto was a large and powerful tropical cyclone that caused extensive wind damage in the British Overseas Territory of Bermuda during September 2019. Like Harvey, Imelda produced rainfall totals that measured in feet rather than inches. visit: www.nhc.noaa.gov. September 10 is the day you're statistically most likely to find a tropical cyclone somewhere in the Atlantic basin. Straka said, “Something interesting to note is that the mesospheric gravity waves from Lorenzo could be seen up to 1,180 km (733 miles) away. Hagibis weakened to a category 2 storm before making landfall in Japan, but was still one of the most damaging typhoons in history. 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. The satellite imagery revealed that Lorenzo was getting better organized as it was strengthening. GPM is a joint mission between NASA and the Japan Aerospace Exploration Agency, JAXA. The Suomi NPP satellite passed over the eastern Atlantic Ocean on Sept. 29, after Lorenzo’s peak when it weakened back to a Category 4 hurricane. The GPM’s core satellite passed over Tropical Storm Karen on Sept. 25 at 0316 UTC (Sept. 24 at 11:16 p.m. EDT). When it became a tropical storm it was renamed “Narda.”. All of them are under a watch from Lorenzo. NASA’s expertise in space and scientific exploration contributes to essential services provided to the American people by other federal agencies, such as hurricane weather forecasting. This isn’t that unheard of, but still worth noting.”. At 11 a.m. EDT (1500 UTC), NHC noted “Karen is expected to produce additional rainfall accumulations of 1 to 2 inches across Puerto Rico and the Virgin Islands, with isolated storm totals of 8 inches.”. However, many were weak and short-lived, especially towards the end of the season. The storm is forecast to graze the east coast of China, south of Shanghai, and then turn northeast. The storm was moving to the west. Imelda was barely a tropical storm for just six hours on September 17, but it was another slow-moving storm. NASA’s Terra satellite is one in a fleet of NASA satellites that provide data for hurricane research. The National Weather Service defines a hurricaneas a “tropical cyclone with maximum sustained winds of 74 mph (64 knots) or higher.” Hurricanes are rated according to intensity of sustained winds on the Saffir-Simpson Hurricane Wind Scale. The others include Dorian, Michael, Maria, Irma and Matthew. Lorenzo is moving toward the west-northwest near 17 mph (28 kph), and this motion is expected to continue through Thursday. That puts Lorenzo’s eye about 995 miles (1,600 km) west of the southernmost Cabo Verde Islands. Due to changing atmospheric conditions around the globe, Atlantic tropical activity is likely to extend later in the season than it did in 2018. When a storm becomes elongated, it’s a sign of weakening. The estimated minimum central pressure is 957 millibars. Dorian formed on August 24, 2019 from a tropical wave in the Central Atlantic and gradually strengthened as it moved toward the Lesser Antilles, becoming a hurricane on August 28. If a storm takes on a more rounded shape it is getting more organized and strengthening. On the forecast track, the center of Lorenzo is expected to pass near the western Azores early on Wednesday, Oct. 2. Philippines warnings still in effect include wind signal #1 for the Luzon provinces of Batanes and Babuyan Islands. Karen is then expected to slow down and make a clockwise loop over the southwestern Atlantic into the weekend.”. By 11 p.m. EDT, infrared imagery showed a small eye had been appearing intermittently. NASA research has shown that cloud top temperatures that cold have the capability to generate heavy rainfall. Over the past 3 years, six storms attained that level of intensity. Karen is forecast to degenerate into a remnant low by Saturday. The Azores consist of nine inhabited islands. It formed in the Main Development Region to the east of the Windward Islands. Hurricane-force winds extend outward up to 90 miles (150 km) from the center and tropical-storm-force winds extend outward up to 255 miles (405 km). The African coast is still clearly visible just east of the storm in the satellite image taken around this time. Forecasters at the Joint Typhoon Warning Center expect 19W will move west-northwest and strengthen, then turn north and move east of Taiwan. 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. The hurricane is moving toward the west-northwest near 15 mph (24 kph). Maximum sustained winds are near 105 mph (165 kph) with higher gusts. On Sept. 27 at 5 a.m. EDT (0900 UTC), Tropical Depression 19W had maximum sustained winds near 25 knots (29 mph)/46 kph). 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. 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). On the forecast track, the center of Narda will move over the Gulf of California near the coast of northwestern mainland Mexico through Tuesday, Oct. 1. 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. Tropical cyclones are made of up hundreds of thunderstorms, and infrared data can show where the strongest storms are located. NOAA’s National Hurricane Center noted that visible satellite images, such as the one from NASA’s Terra satellite and wind data from NOAA buoy 40149 to the northeast, suggest that the low-level circulation is becoming elongated. Earlier in the day, at 5 a.m. EDT, infrared satellite data showed that Narda continued to produce very intense deep convection (strong thunderstorms) with cloud tops colder than minus 80 degrees Celsius (minus 112 degrees Fahrenheit). Hurricane Dorian was the fourth named storm, second hurricane, and first major hurricane of the 2019 Atlantic hurricane season. NASA’s Goddard Space Flight Center. Hurricane Lorenzo may be remembered as the most unique storm of 2019. For updated forecasts, visit: www.nhc.noaa.gov. NASA’s Terra satellite captured an image of Typhoon Mitag’s cloud-filled eye, located east of Taiwan. The areas covered include the Atlantic Ocean, Gulf of Mexico and the Caribbean Sea. Karen was moving toward the north near 15 mph (24 kph). It stalled over eastern Texas and maintained a steady supply of moisture from the Gulf of Mexico, reminiscent of Hurricane Harvey in 2017. Karen is then forecast to make a slow clockwise loop, ultimately moving westward by early Sunday. Get the monthly weather forecast for Hurricane, UT, including daily high/low, historical averages, to help you plan ahead. On Saturday, Sept. 28, when Lorenzo attained Category 5 (Cat 5) strength on the Saffir-Simpson Hurricane Wind Scale it was in a place more than 600 miles east-northeast of the previous record Cat 5 storm. 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