Live Updates – Tropical Wave 17

Tropical Wave 17 is forecast to move across Trinidad and Tobago on June 30th into July 01st. While widespread heavy rainfall is not anticipated, isolated showers and thunderstorms are possible. Isolated heavy rainfall may trigger street or flash flooding. The main hazard associated with this tropical wave remains gusty winds up to and in excess of 60 KM/H. This may cause localized wind damages, downed trees, utility poles, and lines, as well as brief power outages. There are no alerts, watches, or warnings in effect from the TTMS. Live updates for this event have ended

Isolated Showers Move Across Trinidad

12:45 PM Wednesday 1st July 2020

The axis of Tropical Wave 17 is well west of Trinidad and Tobago. However, its large moisture envelope continues to move across the island.

Combined with local climatic effects, isolated showers are forecast to favor Western and hilly areas through the late afternoon, with a low-medium chance of a thunderstorm.

Main hazards remain gusty winds associated with heavier showers or thunderstorms and locally heavy rainfall, though activity remain brisk.



Activity Associated With Tropical Wave 17 Remains North, East of Trinidad through the evening.

5:00 PM Tuesday 30th June 2020

As anticipated, much of the activity associated with Tropical Wave 17 have begun to interact with unfavorable upper level winds and wind shear, diminishing activity just east of Trinidad and Tobago as it approached the islands.

Going through the evening and into tonight, mostly settled conditions are forecast with partly cloudy skies. Moisture will still be moving across Trinidad and Tobago so humid conditions are forecast.

On Wednesday, after an initially hot and sunny morning, by the late morning through the afternoon, isolated showers are forecast to develop across the Western half of Trinidad and hilly areas across both islands. There is a low to medium chance of a thunderstorm. The main hazards would be locally heavy rainfall and gusty winds accompanying heavier showers or thunderstorm activity.

GOES-EAST GEOCOLOR imagery showing a tilted Tropical Wave 17 moving across the Lesser Antilles. (NASA)
GOES-EAST GEOCOLOR imagery showing a tilted Tropical Wave 17 moving across the Lesser Antilles. (NASA)


Showers Favoring Northern, Eastern Trinidad & Tobago

3:15 PM Tuesday 30th June 2020

Isolated to scattered showers persist across Trinidad and Tobago, with heavier showers favoring Northern and Eastern Trinidad.

Additional showers are approaching Tobago and moving across Trinidad, with thunderstorms possible.

Main hazards: Heavy Rainfall, Gusty Winds & Street Flooding



Isolated Thunderstorms Affecting T&T

2:00 PM Tuesday 30th June 2020

An isolated thunderstorm affected parts of the Penal-Debe area, moving west, dumping up to 20 millimeters across the area, but no street flooding was reported.

Additional showers and thunderstorms are forecast through the evening across both islands as activity associated with Tropical Wave 17 nears the area.



Showers, Thunderstorms Affecting T&T

1:00 PM Tuesday 30th June 2020

Isolated showers are moving across Trinidad, producing brisk, but locally heavy rainfall. An isolated thunderstorm has developed northwest of Trinidad.

Much of the activity associated with Tropical Wave 17 will begin to move on shore Eastern Trinidad and Tobago over the next hour, spreading across both islands by 3:00 PM.

Main hazards: Gusty winds, locally heavy rainfall reducing visibility on the roads and street flooding. Frequent lightning also possible in thunderstorms.



Showers, Thunderstorms Begin Across T&T

12:00 PM Tuesday 30th June 2020

As forecast, moisture associated with the ITCZ and the merged Tropical wave 16/17 will begin to move across T&T. After midday, isolated to scattered showers and isolated thunderstorms are forecast to favor Eastern and Southern Trinidad, gradually moving west to west-northwest. These conditions, mainly isolated to scattered showers, are forecast throughout the day, interrupting partly to mostly cloudy skies.

Overall, heavier showers and thunderstorms are forecast to favor southeastern Trinidad and offshore areas. The main hazards would be locally heavy rainfall, reducing visibility, and localized wind damage from wind gusts associated with heavier showers or thunderstorms. Generally, with heavy showers and thunderstorm activity, street flooding, particularly in flood-prone areas or areas with poor drainage, is possible as well as flash flooding in areas where more prolonged heavy rainfall may occur.

Gusty winds, up to and in excess of 60 KM/H possible. Seas to remain moderate, with waves up to 1.5 meters in open waters, occasionally up to 2.0 meters. In sheltered areas, near 1.0 meter but choppy due in heavier showers or thunderstorms.



Chances for Development Near 0%

June 29th 2020



Chances for Development of Tropical Wave 17 Remain Low

June 29th, 2020

The National Hurricane Center maintains a low chance of tropical cyclone formation over the next 48 hours as the wave is forecast to experience strong wind shear and upper level winds, diminishing activity.



Tropical Wave 17 Monitored for Development

June 28th 2020

The axis of Tropical Wave 17 (along the northern axis) is being monitored for development, though tropical cyclone formation remains unlikely.



Tropical Wave 17 Forecast to Bring Unsettled Weather to T&T

June 27th, 2020

The axis of Tropical Wave 17 is forecast to move across T&T mid-week, bringing elevated chances for showers and thunderstorm activity.



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