10 PM EDT – Potential Tropical Cyclone Fifteen Upgraded to Tropical Storm Maria

Potential Tropical Cyclone Fifteen was upgraded to Tropical Depression Fifteen this afternoon, and has since been upgraded (again) to Tropical Storm Maria.

5 PM EDT Advisory Info: As of the 5 PM EDT advisory, Maria had maximum sustained winds of 50mph, a minimum central pressure of 1002 millibars, and was moving west at a fairly fast clip of 20mph.

Forecast path for Tropical Storm Maria as of 5 PM EDT September 16, 2017.

Forecast Track (next 5 days): A ridge of a high pressure will likely steer Maria west-northwestward through the next 5 days, meaning a track across the portions of the Lesser Antilles Monday/Tuesday and across portions of the Greater Antilles late next week remains likely.

Intensity Forecast (next 5 days): Maria is likely to intensify into a hurricane tomorrow or Monday, and eventually a major hurricane, as environmental conditions are (and will remain) very conducive for strengthening. The potential is also there for rapid intensification.

ECMWF ensemble mean 500 millibar height and anomaly forecast valid next Sunday. It depicts Maria in the Bahamas and ridging over the East Coast.

Extended Range: looking out into the extended range, it appears likely that there will be a pattern in place in about 7 – 10 days that will favor ridging (high pressure) over the Eastern U.S. that would prevent Maria from hooking northeast out to sea.

However, a track out to sea still can’t be ruled out, as there is a possibility that Jose will still be meandering over the North Atlantic by that time. This would cause a weakness in ridge allowing Maria to track out to sea.

That being said, it is too early to determine with any degree of certainty if Maria will be a threat to the U.S. or not.

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Caleb Carmichael
Caleb Carmichael

Caleb is the owner of Gulf Coast Storm Center. He is currently an undergraduate student at Mississippi State University majoring in geoscience with a concentration in broadcast and operational meteorology. While not yet a meteorologist, Caleb has been providing weather updates, news, and analysis for the Gulf Coast since 2014.

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