What you need to know
— What: Two tropical waves (TW43 and TW44), the Intertropical Convergence Zone, and a combination of favorable upper- and low-level conditions, deep-layered moisture, and light wind shear are forecast to lead to periods of rain, showers, and thunderstorms, some of which may be locally heavy/strong, particularly by Sunday into Monday.
— Where: Both islands are forecast to experience locally high rainfall with 4-day totals (Saturday through Tuesday). Latest forecasts show up to 75 millimeters across both islands, with localized totals up to 150 millimeters across parts of Trinidad. Gusty winds (50 km/h) are likely from Saturday, with higher gusts across Tobago and in heavy shower/thunderstorm activity across both islands.
— When: The TTMS has issued the Adverse Weather Alert from noon Saturday, October 18th, 2025, through 10:00 PM Monday, October 20th, 2025, capturing the most intense activity. Heavy rainfall and thunderstorms, however, may begin in some areas as early as pre-dawn Saturday morning.
— Impacts: Street/flash flooding and localized ponding are likely in heavy downpours, accompanied by gusty winds exceeding 50 km/h. These wind gusts, combined with heavy rainfall, may lead to fallen trees/utility poles/lines and landslides, as well as localized wind damage and agitated seas. In strong thunderstorm activity, frequent lightning is likely, with the possibility of funnel clouds on Sunday into Monday. By Sunday night, as soils become saturated, those living in flood-prone areas along larger watercourses should be aware of the possibility of flash or riverine flooding.
— What Should You Do: Secure loose outdoor objects. Motorists and residents in areas prone to flooding or landslides should remain alert and exercise caution. Be aware of your surroundings and changing weather conditions. Take necessary precautions to mitigate potential impacts. If you encounter flood waters, turn around. If you hear thunder, head indoors.
Latest Alerts
High Wind Alert Remains In Effect For T&T
Trinidad and Tobago is NOT under any tropical storm or hurricane threat, watch, or warning at this time.
The Adverse Weather Alert
The Trinidad and Tobago Meteorological Service issued an Adverse Weather Alert (Yellow Level) on Friday, October 17th, 2025, at 3:40 PM. The alert goes into effect at noon (12:00 PM) Saturday, October 18th, 2025, and remains in effect for Trinidad, Tobago, and surrounding waters, through 10:00 PM Monday, October 20th, 2025. Note that heavy showers and thunderstorms are forecast before this alert is effective, between 5:00 AM and midday on Saturday.
According to the TTMS, this “alert” status considers the possibility of the event occurring. This adverse weather event is likely, and the following are likely, according to the TTMS:
- Periods of showers and isolated thunderstorms are expected from midday on Saturday, followed by more impactful weather from Sunday morning through Monday, as an active tropical wave is forecast to move across the area during this time.
- There is a high (75%) chance of intermittent rainfall, heavy showers, and isolated thunderstorms.
- Impacts: Gusty winds can occur in the vicinity of heavy showers/thunderstorms, which may displace loose outdoor items and further agitate seas. Heavy downpours can lead to street/flash flooding as well as localized ponding and may trigger landslides/landslips, especially along hillsides and other vulnerable areas.
- Forecast conditions remain dynamic and may continue to evolve over the coming days. The TTMS will continue to monitor and provide updates as necessary.
The alert’s color indicates the event’s severity and the likelihood of its occurrence. Currently, the alert level is Yellow. This means the hazards are likely, and the severity of the impacts is moderate for this particular alert. You should be aware of the hazards in your area, which include street or flash flooding, gusty winds exceeding 50 km/h, falling trees, landslides, and agitated seas.
A moderate Adverse Weather Alert can result in possible injuries and behavioral changes, which are necessary to ensure safety. Minor property damage may also occur, temporarily disrupting income-earning activities and affecting several communities.
The Met Office advises the public to secure loose outdoor objects. Motorists and residents in areas prone to flooding or landslides should remain alert and exercise caution. Be aware of your surroundings and changing weather conditions. Take necessary precautions to mitigate potential impacts.
