Live Updates – Inclement Weather Impacts from Tropical Wave 15

This post will be updated over the next 36 hours as Tropical Wave 15 moves across Trinidad, Tobago, and the Windward Islands.

10:39 AM Friday 5th July 2019

The Trinidad and Tobago Meteorological Service has cancelled the Adverse Weather Alert as of 10:39AM Friday.

While a few isolated showers are still possible today, breezy and hazy conditions are likely as a mild plume of Saharan Dust is moving into the region.

This dust event is forecast to be short-lived as Tropical Wave 16 is forecast to move across T&T on Monday into Tuesday with active weather likely on Tuesday.

This will be the last update on Tropical Wave 15.



7:15 AM Friday 5th July 2019

Where were the showers and thunderstorms that were supposed to begin at 4:00 AM? A reduction in mid- to low-level moisture, as well as unfavorable upper-level divergence, amongst other reasons limited shower and thunderstorm development overnight. However, partly cloudy conditions persisted as shallow low-level clouds traversed the region.

As of 7:15 AM, a cluster of showers, with locally heavy pockets are forecast to move across mainly Trinidad within the next hour to 90 minutes.

Based on the latest analysis, breezy conditions with isolated showers and the low chance of a thunderstorm, favoring Southern and Western Trinidad are forecast to continue through the first half of today but the threat for severe weather has been reduced notably. A mid-level high-pressure system is forecast to build across the region, with a mild surge in Saharan Dust over the second half of today (Friday).

Note that stronger showers and thunderstorms south of Trinidad, along coastal Venezuela, may keep mostly cloudy skies in the forecast for the Southern half of Trinidad. Tropical Wave 15 is now well west of Trinidad and Tobago in the Caribbean Sea, along 64-65W.

7:15 AM Radar Update: A cluster of showers with isolated heavy pockets are approaching Eastern Trinidad, forecast to move across the island within the next hour to 90 minutes. Isolated thunderstorms may develop, mainly across Southern and Western Trinidad as these showers move westward. Credit: Trinidad and Tobago Meteorological Service
7:15 AM Radar Update: A cluster of showers with isolated heavy pockets are approaching Eastern Trinidad, forecast to move across the island within the next hour to 90 minutes. Isolated thunderstorms may develop, mainly across Southern and Western Trinidad as these showers move westward. Credit: Trinidad and Tobago Meteorological Service


4:00 PM Thursday 4th July 2019

An adverse weather alert has been issued for Trinidad and Tobago beginning 4:00 AM Friday, through 2:00 PM Friday as showers and thunderstorms are forecast to produce inclement weather. Gusty winds, street/flash flooding and landslides are possible.



3:00 PM Thursday 4th July 2019

As forecast, thunderstorms are beginning to occur south of Trinidad, with isolated heavy showers and a thunderstorm across Southwestern Trinidad. Thunder and lightning have been reported across La Brea and Vessengy.

Lightning strikes in the past hour:

  • 80 strokes in past 5 mins.
  • 155 strokes in past 10 mins.
  • 343 strokes in past 20 mins.
  • 446 strokes in past 30 mins.
  • 629 strokes in past 60 mins

Note that most of these strikes have been south of Trinidad, and intra-cloud strikes, i.e. cloud-to-cloud lightning.

Lightning across Trinidad and Tobago as of 2:59 PM Thursday 4th July 2019

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12:30 PM Thursday 4th July 2019

The Ministry of Works and Transport wishes to advise all that the North Coast Road is now fully opened for traffic, however, motorists are to expect some traffic disruptions as works will continue tomorrow (Friday 5th July 2019) between the hours of 9 AM to 2 PM to remove additional trees.



11:45 AM Thursday 4th July 2019

The North Coast Road has been partially opened. Commuters are advised to proceed with extreme caution.



11:00 AM Thursday 4th July 2019

Sunshine has appeared across Trinidad and Tobago  with isolated showers developing across Southern Trinidad. An increase in total precipitable water is likely over the next few hours. This, coupled with increased surface heat and favorable atmospheric conditions may allow for the formation of isolated heavy showers and thunderstorms mainly across Trinidad, interrupting sunny skies.

Much of the further forecast inclement weather is expected late this evening as the tail end of this tropical wave and the ITCZ moves across T&T.

Gusty winds, street/flash flooding, frequent lightning in thunderstorms and additional landslides are all possible.



9:13 AM Thursday 4th July 2019

Motorists are asked to proceed with caution along the Paria Main Road, Toco as there is still some leftover debris from fallen trees. The Ministry of Works and Transport‘s work crew is expected to be on site shortly.



9:10 AM Thursday 4th July 2019

The San Juan/Laventille Regional Corporation is on site starting to cut parts of the fallen trees, while heavy equipment is on its way.



8:10 AM Thursday 4th July 2019

Street flooding is ongoing along the Freeport Mission Road, in the vicinity of Rampersad Medical Center. Minor traffic delays are occurring.

 Street flooding is ongoing along the Freeport Mission Road, in the vicinity of  Rampersad Medical Center. Minor traffic delays are occurring. Flooding occurred due to heavy overnight showers as Tropical Wave 15 affects the region.
Street flooding is ongoing along the Freeport Mission Road, in the vicinity of Rampersad Medical Center. Minor traffic delays are occurring. Flooding occurred due to heavy overnight showers as Tropical Wave 15 affects the region.


8:00 AM Thursday 4th July 2019

The Ministry of Works and Transport have temporarily closed the North Coast Road due to fallen trees and landslides in order to facilitate clean-up operations. They are attempting to re-open one lane of traffic by 9:30 AM.



5:00 AM Thursday 4th July 2019

Downed trees and a landslide has rendered the North Coast Road in the vicinity of the 6-kilometer marker, near the pillars, impassable. Avoid area and delay travel.



3:45 AM Thursday 4th July 2019

Gusty winds continue to move across Trinidad and now Tobago has showers and thunderstorms associated with the ITCZ and Tropical Wave 15 occur.

Generally, wind gusts between 30 KM/H to 50 KM/H have been recorded across Trinidad, with likely higher gusts in elevated regions. Some trees may have fallen along unstable slopes or in weaker soils.

Note that heavy rainfall rates, up to 100 millimeters per hour (considered violent rainfall), have been recorded. However, these showers have mostly remained brisk, so no significant rainfall accumulations have occurred.

High Winds Precautions
High Winds Precautions

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2:00 AM Thursday 4th July 2019

Another round of showers, this time more widespread, is approaching Trinidad and Tobago with a higher risk of gusty winds.



11:30 PM Wednesday 3rd July 2019

Showers, thunderstorms begin to affect mainly Trinidad. Gusty winds and locally heavy rainfall moved across the island. Wind gusts from this round of showers, which occurred between 11:30 PM Wednesday and 1:00 AM Thursday, were generally between 30 KM/H to 40 KM/H. Though rainfall rates in isolated areas were recorded to be 100 millimeters per hour (violent rainfall), these showers and thunderstorms were fairly brisk. At most, only 10-15 millimeters of rainfall was recorded across Trinidad.



3:00 PM Wednesday 3rd July 2019

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