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[Tuesday Evening] Cindy Bringing Flooding Threat to the North Gulf Coast; Bret Dissipating Over the SE Caribbean

   Posted by Levi at 11:22pm on June 20, 2017


9 comments

[June 20] PTC3 to Bring Copious Rainfall to North Gulf Coast; Bret Moving Through the SE Caribbean

   Posted by Levi at 12:38pm on June 20, 2017

Potential Tropical Cyclone Three is gradually becoming better organized in the central Gulf of Mexico. The surface circulation has become well-defined, and convection is beginning to take on a curved-band appearance to the NE of the center. However, strong southwesterly wind shear continues to keep the storm lopsided, with the majority of wind and rain occurring well north and east of the center. Rainfall has already begun along the north gulf coast, and will continue over the next couple of days. This heavy rain will be the primary impact of PTC3 along much of the gulf coast. Due to the aforementioned shear, PTC3 is not expected to strengthen much over the next couple days, but will likely acquire sufficient convective organization to be classified as a subtropical or tropical cyclone.

The system is currently interacting and partially merging with a mid-level low over the NW Gulf of Mexico. This low tilts NW with height, and the upper-level low remains just off the upper Texas coast. PTC3 is not expected to move fully beneath the upper low, thus moderate SW shear is expected to remain over the system until landfall along the TX or LA coastline sometime on Thursday. Due to growing proximity of PTC3 to the upper low, convective heating beneath the PV anomaly may cause shear to lessen some just before landfall. Some slight intensification is possible at that time, but the system is not currently expected to have enough time prior to landfall to take full advantage of it. The now robust low-level circulation is expected to become more symmetric, with moisture and potentially tropical storm-force winds wrapping around to the western semicircle. Thus, although most impacts currently remain north and east of the center, by the time of landfall, impacts may extend both to the east and to the west of the storm center when it crosses the coast.


Tropical Storm Bret, after forming SE of Trinidad yesterday, is now moving into the SE Caribbean just off the coast of Venezuela, and maintains and organized appearance, although the effects of southwesterly shear are beginning to manifest. This shear will increase over the next day or so, and is likely to eventually cause the dissipation of Bret in a couple of days. Until that time, however, Bret may bring tropical storm conditions to the southern Caribbean islands, perhaps as far west as Aruba, Bonaire, and Curacao. A tropical storm warning remains in effect for a portion of the Venezuelan coastline and Margarita Island.


6 comments

[June 18] 92L a Threat to the SE Caribbean; 93L to Bring Widespread Heavy Rain to North Gulf Coast

   Posted by Levi at 9:15pm on June 18, 2017


13 comments

Watching Disturbed Weather in the Caribbean and Gulf of Mexico Next Week

   Posted by Levi at 12:12am on June 16, 2017


16 comments

Outlook for the 2017 Atlantic Hurricane Season

   Posted by Levi at 1:17am on June 2, 2017

Be prepared and have a hurricane plan! It’s impossible to know in advance if you will be impacted by a storm this year.


18 comments

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