Adverse Weather Alert Discontinued. Showers, Thunderstorms Remain In The Forecast.

Adverse Weather Alert Discontinuation

Adverse Weather Alert Discontinued

The Trinidad and Tobago Meteorological Service has discontinued the Adverse Weather Alert as the potential of significant impacts have passed, as conditions become settled across Trinidad and Tobago.

“This is the final public warning message for this adverse weather event. Continue to monitor official sources for information.” according to the TTMS.

Trinidad and Tobago is NOT under any tropical storm threat, watch or warning.

Information from the Trinidad and Tobago Meteorological Service concerning the Adverse Weather Alert Discontinuation for November 27th, 2019.

The color of the alert indicates the severity of the event and the probability of the event occurring. Currently, the alert level is at Green, as the Discontinuation was issued.

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

The 68th tropical wave of the 2019 Atlantic Hurricane Season is now well west of Trinidad and Tobago and most of the activity trailing the wave has subsided. A tropical update will be posted later today as the 2019 Atlantic Hurricane Season winds down.

Tropical waves typically have fair weather ahead of the wave axis, though other features in the area such as surface troughs, increased atmospheric moisture, and local climatic effects, to name a few, may trigger showers and the odd thunderstorm. Following the passage of the wave, much of the active weather typically associated with a tropical wave occurs.
Tropical waves typically have fair weather ahead of the wave axis, though other features in the area such as surface troughs, increased atmospheric moisture, and local climatic effects, to name a few, may trigger showers and the odd thunderstorm. Following the passage of the wave, much of the active weather typically associated with a tropical wave occurs.
Image Credit: Trinidad and Tobago Meteorological Service. Adverse Weather Alert Discontinuation.
Image Credit: Trinidad and Tobago Meteorological Service

What We Know

8:45 AM Wednesday 27th November 2019 Radar Update showing isolated showers and thunderstorms are approaching Eastern Trinidad and Tobago. Image: Trinidad and Tobago Meteorological Service
8:45 AM Wednesday 27th November 2019 Radar Update showing isolated showers and thunderstorms are approaching Eastern Trinidad and Tobago. Image: Trinidad and Tobago Meteorological Service

The axis of Tropical Wave 68 along 67W south of 17N, moving west at 15 knots. The tropical wave is evident in total precipitable imagery and infrared satellite imagery. Scattered showers are noted from 14N-17N between 65W-69W and near the coast of Venezuela.

Although the Adverse Weather Alert has been discontinued, brisk isolated showers and thunderstorms are approaching Trinidad and Tobago. Credit: Weathernerds
Although the Adverse Weather Alert has been discontinued, brisk isolated showers and thunderstorms are approaching Trinidad and Tobago. Credit: Weathernerds

Presently, very favorable upper-level divergence and favorable low-level convergence are present across T&T, supporting showers and thunderstorms approaching the area.

Strong low-level winds and very strong wind shear will keep showers and thunderstorms moving briskly westward, and limit the strengthening of convective activity but also producing gusty winds as showers and thunderstorms weaken as it moves westward.

The Weather Forecast

Wednesday: Trailing moisture and instability will aid in the development of showers and thunderstorms, favoring Southern and Eastern halves of Trinidad. This activity will interrupt sunny to partly cloudy skies. By the late morning through the afternoon, localized climatic effects may trigger showers and thunderstorms across Western Trinidad. Lingering showers, remaining isolated and interrupting partly cloudy skies, are forecast by the late evening through the night mainly across Eastern and Southern Trinidad and Tobago.

Thursday: Drier conditions are forecast with a high pressure moving into the region and drier atmospheric conditions. Isolated showers are possible during the afternoon, interrupting a mostly sunny day across both islands.

Impacts This Upcoming Week

Winds: Sustained surface winds between 20 KM/H and 35 KM/H with gusts in excess of 55 KM/H are likely in heavy showers or thunderstorms across Trinidad and Tobago throughout the week.

With wind gusts in excess of 55 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: Due to the brisk moving nature of these showers and thunderstorms, overall rainfall accumulations are forecast to be less than 10 millimeters and up to 25 millimeters in localized downpours 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. No riverine flooding is expected.

Frequent Lightning: In addition, with forecast thunderstorms, frequent lightning is likely. Lightning can cause power outages, voltage dips, damage to life and property, particularly during cloud-to-ground lightning strikes.

Landslides: Landslides are possible in landslide-prone and elevated areas.

Hazardous Seas: An increase in strong low-level winds will keep seas at moderate levels, with waves up to 2.5 meters in open waters, particularly along the Eastern coasts of both islands. In sheltered areas, waves are forecast to be below 1.0 meter.

Note a long-period swell event is forecast to begin on Sunday 1st December through Wednesday 4th December. This may cause coastal erosion, life-threatening rip currents, large battering waves near coastal areas resulting in coastal flooding.

Why I May Not/Will Not See Constant Rainfall?

A frequent complaint is the forecast is wrong because I didn’t experience any rainfall. Scattered showers mean that you, individually, may experience some showers intermittently throughout the day and there is a higher chance for this activity than isolated activity. Widespread showers mean that nearly all persons and areas may experience rainfall.

Forecast - Isolated, Scattered, Widespread - What do they mean?

Facebook Comments