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Category: Active Tropics

Tropical Depression Four forms over tropical Atlantic 

Tropical Depression Four forms over tropical Atlantic 

Tropical Depression Four has formed over the tropical Atlantic. The depression was centered near 12.8°N 38.4°W. Maximum sustained winds were estimated at 25 knots (30 mph), with an estimated minimum pressure of 1009 mb. Four is expected to strengthen slightly as it moves west-northwestward through the tropical Atlantic, but the National Hurricane Center (NHC) currently does not expect that the depression will strengthen into a tropical storm. Increasing wind shear and dry air will likely limit intensification, and the official NHC…

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94L taking its time developing over Atlantic

94L taking its time developing over Atlantic

Invest 94L – a broad area of low pressure located about 800 miles west-southwest of the Cabo Verde Islands – has a window of developing into a tropical depression during the next couple of days before conditions become less favorable. At 8:00 p.m. Tuesday, the National Hurricane Center (NHC) gave 94L a 70 percent chance of development within 48 hours and an 80 percent chance of development within five days. 94L has been moving very slowly westward today. As of…

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Invest 94L likely to develop in Atlantic, three systems in East Pacific may develop, Nanmadol near Japan

Invest 94L likely to develop in Atlantic, three systems in East Pacific may develop, Nanmadol near Japan

Invest 94L – a broad area of low pressure located about 650 miles southwest of the Cabo Verde Islands – is likely to develop into a tropical cyclone later this week as it moves west-northwestward across the tropical Atlantic at about 5-10 mph. In the Eastern Pacific, three systems (including Invest 94E) have a chance of development this week as well. In the West Pacific, Severe Tropical Storm Nanmadol could pose a threat to Japan tomorrow. Invest 94L: Likely to…

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Tropical wave in Atlantic could develop, Invest 94E designated in East Pacific, Tropical Storm Nanmadol forms in West Pacific

Tropical wave in Atlantic could develop, Invest 94E designated in East Pacific, Tropical Storm Nanmadol forms in West Pacific

The Northern Hemisphere tropics are beginning to get active as they typically do in July. The Atlantic, East Pacific and West Pacific all have areas to watch this week. In the Atlantic, a tropical wave is located southwest of the Cabo Verde Islands and is being monitored for gradual development. In the East Pacific, there is potential for two tropical cyclones to form with Invest 94E and another tropical wave. In the West Pacific, Tropical Storm Nanmadol has formed in…

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Dora weakens to a remnant low, development in both Atlantic and East Pacific unlikely in near future

Dora weakens to a remnant low, development in both Atlantic and East Pacific unlikely in near future

Farewell, Dora The life of Hurricane Dora – the strongest tropical cyclone in the Northern Hemisphere so far in 2017 by wind speed – came to an end this morning. Dora became devoid of deep convection last night, and new convection did not redevelop. As a result, the National Hurricane Center (NHC) declared Dora a remnant low at 9:00 a.m. MDT (11:00 a.m. EDT) and terminated advisories. Dora is now just a swirl of low-level clouds, but a vigorous circulation…

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Dora weakens to a tropical storm, another East Pacific system, Chance of Atlantic MDR development decreasing

Dora weakens to a tropical storm, another East Pacific system, Chance of Atlantic MDR development decreasing

Tropical Storm Dora is feeling the effects of cooler sea surface temperatures, and has begun to weaken. Dora fell below hurricane strength this afternoon as deep convection has continued to decrease. Dora should continue to lose convection and become a remnant low by Thursday, if not sooner. Meanwhile, two other systems (one in the Atlantic and one in the East Pacific) both have a low chance of development over the next several days. Dora meeting its demise This morning, Dora…

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Dora peaks as a strong category 1 hurricane, two other systems to watch over coming days

Dora peaks as a strong category 1 hurricane, two other systems to watch over coming days

Tropical Storm Dora rapidly intensified last night to become the first hurricane of the 2017 Pacific hurricane season. Dora strengthened to a high-end category 1 hurricane this afternoon, but cooling sea surface temperatures are likely to induce a weakening trend beginning tonight. Dora should weaken to a remnant low by Thursday as it continues moving northwestward in the Eastern Pacific. Forecast for Dora As of 3:00 p.m. MDT (5:00 p.m. EDT), Hurricane Dora was centered in the Eastern Pacific near 17.8°N…

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Tropical Storm Dora forms over the East Pacific, expected to become first hurricane of season

Tropical Storm Dora forms over the East Pacific, expected to become first hurricane of season

Early Sunday, Tropical Depression Four-E strengthened into Tropical Storm Dora, becoming the fourth named storm of the 2017 Pacific hurricane season. Dora has continued to strengthen this morning, although its circulation center has become partially exposed to the north of the main convective mass. Dora is likely to strengthen to a minimal hurricane by Tuesday before weakening commences as the cyclone moves over cooler waters. As of 10:00 a.m. CDT  (11:00 a.m. EDT), Dora was centered near 15.0°N 101.8°W and was…

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Invest 93E in Eastern Pacific very close to Tropical Depression Status, likely to become Tropical Storm Dora

Invest 93E in Eastern Pacific very close to Tropical Depression Status, likely to become Tropical Storm Dora

Invest 93E in the Eastern Pacific has become better organized today, and is very close to becoming a tropical depression. 93E has a very large convective canopy, but lacks a central dense overcast.  This could be the reason why it has not yet been classified as a tropical depression. The National Hurricane Center gives 93E a 90 percent chance of development, both within 48 hours and five days. They also said that advisories could be initiated tonight if the organization…

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Cindy makes landfall in Southwestern Louisiana, weakens to a Tropical Depression, heavy rainfall threat continues

Cindy makes landfall in Southwestern Louisiana, weakens to a Tropical Depression, heavy rainfall threat continues

Tropical Storm Cindy made landfall in Southwestern Louisiana around 4:00 AM CDT Thursday morning, west of the town of Cameron. Cindy at the time of landfall had maximum sustained winds of 35 knots (40 mph) with a minimum pressure of 994 mb. Since landfall, the appearance of Cindy has degraded, and Cindy has since been downgraded to a tropical depression. Cindy remains a tropical depression this evening, but advisories are now being issued by the Weather Prediction Center (WPC) instead…

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