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Tag: Long-range development

Broad low pressure area likely to form over the Northwestern Caribbean next week, may develop

Broad low pressure area likely to form over the Northwestern Caribbean next week, may develop

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The first tropical cyclone of the 2018 Atlantic hurricane season has a chance to form late next week – and may lead to a messy Memorial Day weekend for Florida and the Southeastern United States, regardless of development. A Central American Gyre (CAG) and a Convectively Coupled Kelvin Wave (CCKW) are expected to increase convection over the Western Caribbean Sea, leading to the formation of a broad area of low pressure. The low pressure area is expected to be pulled…

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Tropical wave over Eastern Atlantic may slowly develop

Tropical wave over Eastern Atlantic may slowly develop

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A tropical wave located a few hundred miles south-southwest of the Cabo Verde Islands has the potential to develop into the next Atlantic tropical cyclone as it moves slowly westward at about 10 mph. The National Hurricane Center (NHC) gives this wave a near zero percent chance of development within 48 hours, and a 30 percent chance within five days. The wave is currently accompanied by disorganized showers and thunderstorms. In the short term, a suppressed Kelvin Wave is located…

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Watching the Atlantic: a tropical wave and a monsoon gyre – not imminent threats at this time

Watching the Atlantic: a tropical wave and a monsoon gyre – not imminent threats at this time

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There continues to be two areas of interest in the Atlantic today, both only having a low chance of development within the next five days. Models continue to indicate that a broad area of low pressure will likely form over the Northwestern Caribbean during the next few days, eventually emerging into the Gulf of Mexico. The National Hurricane Center continues to give this system a near zero percent chance of development within 48 hours, and a 20 percent chance of…

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TD Three-E strengthens into Tropical Storm Calvin, TS Merbok makes landfall in Hong Kong, continuing to watch the Atlantic

TD Three-E strengthens into Tropical Storm Calvin, TS Merbok makes landfall in Hong Kong, continuing to watch the Atlantic

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The Northern Hemisphere tropics remain active today, with Tropical Storm Calvin being named in the East Pacific, Tropical Storm Merbok making landfall in Hong Kong, and the development threat in the Caribbean or Gulf of Mexico by early next week. TROPICAL STORM CALVIN IS BORN The organization of Tropical Depression Three-E improved enough on Monday afternoon for the National Hurricane Center to upgrade it to Tropical Storm Calvin at 5:00 PM EDT (4:00 PM CDT local time). Calvin is the…

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Tropical Depression Three-E quickly forms in East Pacific, Tropical Storm Merbok a threat to China, and Caribbean development still a possibility

Tropical Depression Three-E quickly forms in East Pacific, Tropical Storm Merbok a threat to China, and Caribbean development still a possibility

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The tropics are coming to life in the Northern Hemisphere this weekend. At 5:00 PM EDT (4:00 PM CDT local time), Tropical Depression Three-E was designated in the East Pacific. Three-E is the third tropical cyclone of the 2017 Pacific hurricane season. In addition, Tropical Storm Merbok was named by the Japan Meteorological Agency (JMA) in the South China Sea, making it the second named storm of the 2017 Pacific typhoon season. TROPICAL DEPRESSION THREE-E (EAST PACIFIC) The National Hurricane…

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Increasing chance of tropical development in Northwest Caribbean next weekend, Invest 92E designated in the East Pacific

Increasing chance of tropical development in Northwest Caribbean next weekend, Invest 92E designated in the East Pacific

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The tropics are likely about to get active in both the Atlantic and Pacific with multiple areas to watch. Several recent model runs have predicted the development of a large, disorganized tropical cyclone in the Northwest Caribbean in about a week. The 12z Saturday GFS, ECMWF, CMC and NAVGEM models all predicted the second Atlantic tropical cyclone of the year to form by June 20.  The CMC track is farther east and predicts a landfall in Florida by Day 10,…

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The GFS model runs for 384 hours, but do not trust the model beyond 240 hours: here is why

The GFS model runs for 384 hours, but do not trust the model beyond 240 hours: here is why

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The American Global Forecast System (GFS) model is one of the most reliable models used by meteorologists to predict the tracks of tropical cyclones. It runs on six-hour intervals at 00:00, 06:00, 12:00 and 18:00 UTC, for 384 hours (16 days). The GFS is the only major tropical weather model that runs for 384 hours: the CMC and ECMWF models run for 240 hours (ten days), while the HWRF hurricane model runs for 126 hours (just over five days). The…

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Models Drop Tropical Development in East Pacific and Caribbean

Models Drop Tropical Development in East Pacific and Caribbean

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Sunday’s model runs of the GFS and ECMWF have nearly abandoned the idea of tropical development in the East Pacific or Caribbean. None of the 12z Sunday GFS or ECMWF runs showed development of a tropical cyclone in the Western Hemisphere over the next 10 days. In fact, meteorologist Eric Blake of the National Hurricane Center practically said to disregard Caribbean storms shown on the GFS model at this point in the season, posting on Twitter: “GFS seems like it…

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Tropics could awaken soon, but models disagree where

Tropics could awaken soon, but models disagree where

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The tropics may not be quiet for much longer. Some tropical development is possible next week, but models are not in agreement on which basin will see activity. The Madden-Julian Oscillation (MJO) is currently unfavorable, but both the GFS and CFS models show the MJO becoming more favorable in the Eastern Pacific and Western Atlantic by the week 2 period. The 12z Saturday ECMWF model indicated the possibility of development in the East Pacific about 7-8 days out, while the…

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