Adverse Weather Alert Extended Until 6 PM Thursday

Key Messages:
— An Adverse Weather Alert Yellow Level remains in effect from 5:00 AM Wednesday now through 6:00 PM Thursday 18th June 2020 for both Trinidad and Tobago. Note that adverse weather is possible through the weekend. Adverse weather is forecast to primarily impact Trinidad and to a lesser extent Tobago as well as marine areas mainly to the east and southeast of Trinidad.
Overall rainfall accumulations remain high. Showers and thunderstorms are forecast to continue overnight tonight and continue through the end of the week, with periodic cloudy periods. Generally, overall totals through 2:00 AM Tuesday (due to back-to-back tropical waves and the ITCZ) forecast to record an additional 50-100 millimeters with isolated totals up to 125 millimeters through the next 5 days. There is an elevated threat of street floodingflash flooding, and lesser so riverine flooding.
— Seas are forecast to increasingly agitate as we progress through the week, up to 2.5 meters in open waters over the next 24 to 72 hours, becoming up to 3.0 meters by Sunday. Sheltered areas are forecast to be near one meter by occasionally rough or choppy during thunderstorms or heavy/violent showers. A brief long-period swell event is ongoing through Thursday.
— Gusty winds in excess of 60 KM/H are likely. These winds will accompany showers and thunderstorms. Winds of this strength will produce wind damage including downed trees, utility poles, and roof damage. Localized power outages possible.
Landslides possible in elevated areas.

The Adverse Weather Alert

As we’ve been monitoring, the axis of Tropical Wave 09 (which moved across T&T this morning through the afternoon), Tropical Wave 10, and Tropical Wave 11 are forecast to move across Trinidad and Tobago over the next 5 days interacting with the Intertropical Convergence Zone. These weather features are forecast to bring periods of rain, showers, and isolated thunderstorms.

Weather conditions are forecast to remain unsettled overnight as the active weather following the wave axis of Tropical Wave 09 moves across T&T and Tropical Wave 10 approaches. Because of this, the Trinidad and Tobago Meteorological Service updated the Adverse Weather Alert Yellow Level on Wednesday afternoon

This updated alert began at 5:00 AM Wednesday 17th June 2020 and now continues through 6:00 PM Thursday 18th June 2020. Note that inclement weather is forecast to continue past the end of the alert, which may cause the alert to be extended and/or upgraded due to the severity of impacts.

Trinidad and Tobago is NOT under any tropical storm watch or warning AT THIS TIME.

Based on the latest model guidance and analysis, severe weather is forecast to begin after midnight continuing through Monday 22nd June 2020.

Information from the Trinidad and Tobago Meteorological Service concerning the Adverse Weather Alert for June 17-18th 2020

There continues to be a high (80%) chance of heavy showers and thunderstorm activity associated with the interaction between a Tropical wave and the ITCZ. Slight improvement is expected tonight, however impactful weather is again expected tomorrow (18th June 2020) . Street/flash flooding can be expected in heavy downpours and gusty winds in excess of 60km/hr can accompany showers and thunderstorm activity. Seas can become agitated/choppy in the vicinity of showers and thunderstorms.” according to the Trinidad and Tobago Meteorological Service. This “alert” status takes into account the possibility of the event occurring. This adverse weather event is likely.

The color of the alert indicates the severity of the event and the probability of the event occurring. Currently, the alert level is at Yellow. This means that the hazard is possible to be aware of the impacts of Street/Flash Flooding and Gusty Winds in your area. Areas prone to landslides should also be aware of the hazard and impacts.

Image Credit: Trinidad and Tobago Meteorological Service
Image Credit: Trinidad and Tobago Meteorological Service
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