[36] Strong wind gusts were recorded in Baja California,[37] causing minmal damage. The World Meteorological Organization re-uses the list of names every seven years. [26], After peaking, Walaka began to undergo an eyewall replacement cycle. When there's significant damage, the National Hurricane Center will retire names from appearing on future hurricane season lists, like Matthew, Irma and Hurricane Maria, which devastated Puerto Rico. 0; The Atlantic hurricane season officially starts June 1, but the first tropical storm of 2018, Alberto, is moving toward the Gulf Coast with Alabama, Florida and Mississippi declaring emergencies. Gilma reached its peak intensity of 45 mph (85 km/h) winds and a pressure of 1,005 mbar (29.68 inHg) at 06:00 UTC on July 27, while located 1,210 mi (1,945 km) west-southwest of the southern tip of the Baja California peninsula. The system was absorbed by a larger extratropical storm in the Bering Sea on September 4. After a period of weakening, Leslie began restrengthening late on October 8, reaching hurricane intensity for the second time on October 10 while executing a sharp turn to the east-northeast. [17] It also had the highest accumulated cyclone energy since 1994's Hurricane John. The storm left approximately $500 million in damage and 16 fatalities. A period of rapid intensification ensued as a result of John being located in a favorable environment of low wind shear, warm sea surface temperatures, and a high quantity of mid-level moisture. A "named storm" has winds of 39 mph or higher, while a hurricane is a storm with winds 74 mph or higher. The remnants of Michael caused flooding in western North Carolina and Virginia, with a maximum precipitation total of 13.01 in (330 mm) near Black Mountain, North Carolina. A tropical depression developed at 18:00 UTC on June 30, while approximately 575 mi (925 km) south of Manzanillo, Mexico. [83] Upon its designation as a tropical storm at the longitude of 30°W, Nadine became the easternmost named storm to develop in the tropical Atlantic so late in the calendar year. The trough moved westward for several days before a passing Kelvin wave improved the environment; this allowed the trough's convection to gradually become more organized. Calculations are provided at, A major hurricane is one that ranks at Category 3 or higher on the, Hector did not dissipate on August 13. [71], On October 12, a tropical storm warning was issued for Madeira for the first time in the island's history, and Leslie became the first tropical cyclone to pass within 100 mi (160 km) of the archipelago since reliable record-keeping began in 1851. Meanwhile, the hurricane was traveling north of west by the flow of a subtropical ridge, which was located over the southwestern United States. The totals represent the sum of the squares for every (sub)tropical storm's intensity of over 33 knots (38 mph, 61 km/h), divided by 10,000. The season concluded with Oscar transitioning into an extratropical cyclone on October 31, almost a month before the official end. Gordon resulted in approximately $200 million in damage throughout the United States. [88] Olivia's two landfalls were the first time in recorded history that a tropical cyclone had made landfall on either island. After a curved band of convection formed later that day, the low became Subtropical Storm Joyce by 12:00 UTC while centered roughly 615 mi (990 km) west-southwest of Flores Island in the Azores. Located within a favorable environment, the nascent depression quickly became better organized, developing banding features around its center. The depression slowly intensified, becoming Tropical Storm Emilia around 12:00 UTC on June 28. Thereafter, the cyclone began moving westward between 12 and 17 mph (19 and 27 km/h) after a subtropical ridge situated north of the storm strengthened. [9] In contrast, on May 30, TSR released their updated prediction, significantly reducing their numbers to 9 named storms, 4 hurricanes and 1 major hurricane, citing a sea surface temperature setup analogous of those observed during the cool phase of the Atlantic multidecadal oscillation.

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