Showers, Thunderstorms Forecast Into Saturday. Street Flooding, Gusty Winds Possible

Key Messages:
— Showers and thunderstorms are ongoing as of 5:00 PM across Eastern Trinidad and Eastern Coastal waters on Friday, generally moving west to west-northwest.
— Through Sunday, between 1 to 1.5 inches (25 to 37.5 millimeters) are possible across Trinidad and Tobago with isolated totals up to 2 inches (50 millimeters) across Eastern, Northern Trinidad and Tobago. There is an elevated threat of street flooding and flash flooding due to the slow moving nature of this activity.
— Seas will remain slight to moderate, with waves up to 1.5 meters are possible in open waters and choppy in sheltered areas.
— Gusty winds in excess of 65 KM/H possible. Winds of this strength will produce wind damage including downed trees, utility poles and roof damage. Localized power outages possible.
— Frequent lightning is expected in thunderstorm activity.
— Landslides possible in elevated areas.

Trinidad and Tobago is NOT under any alerts, watches or warnings AT THIS TIME (5:00 PM Friday 18th October 2019)

What We Know

A tropical wave located along 65W is influencing our local wind regime, triggering showers and thunderstorms across Trinidad and Tobago, with much of the activity associated with this wave remaining north and west of T&T.  Additional showers and thunderstorms forecast. Credit: Weathernerds
A tropical wave located along 65W is influencing our local wind regime, triggering showers and thunderstorms across Trinidad and Tobago, with much of the activity associated with this wave remaining north and west of T&T. Additional showers and thunderstorms forecast. Credit: Weathernerds

As of 5:00 PM Friday, the 55th tropical wave of the 2019 Atlantic Hurricane Season is moving west of the Lesser Antilles. Much of the activity is moving across the Leewards and Northern Windwards.

T&T is located in an area of favorable upper-level divergence and low-level convergence, combined with low wind shear across Trinidad and Tobago and deep tropical moisture across the region, has allowed for strong thunderstorms and heavy showers to develop across both islands.

5:00 PM Friday 18th October 2019 Radar Update: Heavy showers and thunderstorms ongoing across Eastern and Southern Trinidad, as well as moderate activity across Tobago. Conditions forecast to continue through the night. Image: Trinidad and Tobago Meteorological Service
5:00 PM Friday 18th October 2019 Radar Update: Heavy showers and thunderstorms ongoing across Eastern and Southern Trinidad, as well as moderate activity across Tobago. Conditions forecast to continue through the night. Image: Trinidad and Tobago Meteorological Service

Isolated to scattered showers, with isolated heavy showers and thunderstorms are ongoing across the Eastern and Southern halves of Trinidad, as well as Tobago. This activity is forecast to continue through the night, gradually becoming settled.

Weather

Friday (until midnight): Tail End of Tropical Wave 55. Periods of showers and thunderstorms are forecast to mainly affect Eastern and Southern halves of Trinidad, as well as Tobago through the night. This activity will gradually move across both islands, interrupting cloudy skies.

Saturday (until midnight): Lingering moisture, ITCZ & localized climatic effects. Essentially the same forecast as the two previous days. After an initially hot and sunny early and mid-morning, isolated to scattered showers and thunderstorms are likely across both islands, with heavier showers and thunderstorms favoring the Western and Northern halves of Trinidad, as well as Tobago. Conditions are forecast to become settled into the night.

Sunday (until midnight): Surface to Mid-level Ridge. Much drier conditions are forecast, with isolated late morning through afternoon showers and thunderstorms across Western Trinidad, interrupting hot and sunny skies.

Wind

Peak sustained surface winds of 25 KM/H to 45 KM/H with gusts in excess of 65 KM/H are possible in heavy showers or thunderstorms across Trinidad and Tobago during heavy shower or thunderstorm activity.

With wind gusts in excess of 65 KM/H, whole trees are expected to be in motion and there may be some inconvenience when walking against the wind gusts. Light outdoor objects may topple or become airborne such as garbage cans, potted plants, loose galvanize or construction material and other outdoor furniture. Tents may jump. Older/weaker trees may fall, bringing down utility poles and lines.

High Wind Event Precautions
High Wind Event Precautions

Rainfall

Through Sunday, between 1 to 1.5 inches (25 to 37.5 millimeters) are possible across Trinidad and Tobago with isolated totals up to 2 inches (50 millimeters) across Eastern, Northern Trinidad and Tobago.

There is an elevated threat of street flooding and flash flooding due to the slow-moving nature of this activity.

Thunderstorms and Lightning

With thunderstorms, locally severe wind (in excess of 65 KM/H), violent rainfall rates (in excess of 50 millimeters per hour) and lightning are all possible.

Gusty winds and lightning pose a threat to our power grid, causing localized power outages. Lightning may also strike trees, homes or utility poles causing damage to property. Lightning can also be deadly to persons outside during a thunderstorm.

Seas and Surf

Seas will remain slight to moderate, with waves up to 1.5 meters are possible in open waters. In sheltered areas, seas are near 1.0 meters, but choppy, particularly during heavier showers or thunderstorms.

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