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Category: Active Tropics

92L could become a short-lived subtropical cyclone, 91E likely to develop over eastern Pacific

92L could become a short-lived subtropical cyclone, 91E likely to develop over eastern Pacific

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For the first time in 2020, there is an Invest (area of investigation) over both the North Atlantic and Eastern Pacific basins. Invest 92L over the central Atlantic could become a short-lived, weak subtropical cyclone during the next two days. Invest 91E is likely to develop into a weak tropical cyclone over the extreme eastern Pacific, but brings a heavy rainfall threat to southern Mexico and central America regardless of development. The next name on the Atlantic naming list is…

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Surprise TS Bertha makes landfall near Mount Pleasant, SC; eastern Pacific development likely this weekend

Surprise TS Bertha makes landfall near Mount Pleasant, SC; eastern Pacific development likely this weekend

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Yet another May tropical storm has formed over the Atlantic, this time rather unexpectedly. On Wednesday morning, Invest 91L developed a new circulation center underneath the convection mass, and 91L rapidly developed into Tropical Storm Bertha. Bertha has already moved inland into South Carolina, and weakening has already begun. Bertha is the Atlantic’s second tropical storm, approximately two months ahead of climatology. Bertha’s formation makes 2020 the first season since 2016 to feature two pre-season tropical cyclones, and the first…

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Surface trough off eastern Florida not likely to become a tropical cyclone, eastern Pacific development possible late this week

Surface trough off eastern Florida not likely to become a tropical cyclone, eastern Pacific development possible late this week

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A surface trough is currently producing disorganized shower and thunderstorm activity off the eastern coast of Florida. Due to strong upper-level winds, development of this trough into a tropical cyclone is unlikely at this time. Regardless, the National Hurricane Center (NHC) gives this disturbance a 20% chance of development, within both the next 48 hours and five days. More likely, however, is the potential development of a tropical cyclone over the far eastern Pacific. A Central American Gyre (CAG) –…

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TS Arthur moving away from North Carolina, expected to become post-tropical Tuesday

TS Arthur moving away from North Carolina, expected to become post-tropical Tuesday

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The center of Tropical Storm Arthur passed very close to the North Carolina Outer Banks on Monday morning, though the center did not make landfall. After Arthur’s convective structure degraded on Sunday, deep convection redeveloped on Monday morning, and Arthur strengthened. Arthur produced sustained tropical storm force winds across portions of the Outer Banks this morning and afternoon. All Tropical Storm Warnings were discontinued at the 5:00 p.m. EDT Monday advisory. As of 5:00 p.m. EDT Monday, Tropical Storm Arthur…

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TS Arthur likely to bring rainfall to eastern North Carolina on Monday

TS Arthur likely to bring rainfall to eastern North Carolina on Monday

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Tropical Storm Arthur, the first named storm of the 2020 Atlantic hurricane season, was named Saturday night, but is struggling with marginal sea surface temperatures and dry air. As of 11:00 p.m. EDT Sunday, Tropical Storm Arthur was centered near 32.4°N 76.9°W, and was moving north-northeastward at about 10 mph. Maximum sustained winds were 40 knots (45 mph), with an estimated minimum pressure of 1003 mb. The center of Arthur was approximately 210 miles south-southwest of Hatteras, North Carolina. Arthur’s…

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Tropical Depression One Forms East Of Florida, May Bring Tropical Storm Conditions to NC Outer Banks

Tropical Depression One Forms East Of Florida, May Bring Tropical Storm Conditions to NC Outer Banks

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The North Atlantic’s first tropical depression of 2020 developed Saturday evening – Tropical Depression One. The formation of TD One makes 2020 the sixth consecutive year in which the Atlantic basin has had tropical or subtropical cyclone activity prior to the official start of the season (June 1). 2020 is also the third straight year with a May subtropical or tropical cyclone, and five of the last six years have had May activity in the Atlantic basin. TD One is…

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Invest 90L likely to become tropical or subtropical storm near the Bahamas by Saturday night

Invest 90L likely to become tropical or subtropical storm near the Bahamas by Saturday night

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It appears very likely that the Atlantic’s streak of pre-season tropical activity, which began in 2015, will continue for a sixth year. A trough of low pressure – now designated Invest 90L – is likely to organize into 2020’s first tropical or subtropical cyclone, possibly as soon as Friday evening. An Air Force Reserve Hurricane Hunter aircraft has been tentatively scheduled to investigate 90L on Friday afternoon. As of 2:40 p.m. EDT Thursday, the National Hurricane Center (NHC) gave 90L…

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Unprecedented April Tropical Depression forms over the eastern Pacific

Unprecedented April Tropical Depression forms over the eastern Pacific

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For the first time in recorded history, a tropical cyclone has formed in the eastern Pacific basin during the month of April. Tropical Depression One-E – the earliest tropical cyclone to form in the eastern Pacific east of 140°W – developed Saturday morning, and has a brief window to intensify into a tropical storm Saturday night before conditions become unfavorable. As of 5:00 p.m. EDT/2:00 p.m. PDT Saturday, Tropical Depression One-E was centered near 14.5°N 116.9°W, and was moving northwestward…

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Hurricane Dorian very close to the coast of South Carolina

Hurricane Dorian very close to the coast of South Carolina

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Hurricane Dorian remains a powerful hurricane and is currently just offshore South Carolina. Dorian could make landfall somewhere in eastern North Carolina on Thursday night, but the model guidance is still split on whether or not a landfall will occur. Dorian is already bringing hurricane conditions and storm surge to the coastal Carolinas. Hurricane Warnings and Storm Surge Warnings remain effect for most of the region, with Tropical Storm Warnings extending into southeastern Virginia and even the coast of Massachusetts….

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Dorian becomes an extremely catastrophic Category 5 hurricane with 180-mph winds

Dorian becomes an extremely catastrophic Category 5 hurricane with 180-mph winds

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Hurricane Dorian rapidly intensified once again overnight, and this morning has become the strongest hurricane on record in the Bahamas region of the Atlantic. Dorian has become a Category 5 hurricane, the fifth in the last four years, making 2016 to 2019 the first time on record that four consecutive Atlantic hurricane seasons had at least one Category 5 hurricane. As of 11:00 a.m. EDT Sunday, Hurricane Dorian was centered near 26.5°N 76.8°W, and was moving westward at about 7…

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