April Showers Turn Into April Floods

April is the transition month between the Dry Season and the Wet Season, typically bringing increased showers dubbed “April Showers” in Trinidad and Tobago. These showers are more frequent but retain the brevity of the typical dry season showers.

Today, moisture ahead of an approaching surface to low-level trough streamed across Trinidad and Tobago. With our mostly sunny start to the day and generally gentle breeze across the country, conditions became favorable by midday through the early afternoon for showers.

Heavy showers developed across Western Trinidad due to effects from sea breeze convergence, fuelled by the low-level moisture already in place across the island.

These showers were capped to low-levels of the atmosphere but still packed a punch with gusty winds affecting areas like Freeport and Southwestern Trinidad.

These showers produced rainfall rates that were heavy (>7.6 millimeters per hour) to violent (>50 millimeters per hour), with rainfall rates in Freeport recorded up to 134.11 millimeters per hour.

Heavy rainfall continued across parts of southwestern Trinidad, producing street flooding across parts of Debe and Penal, particularly along the S.S. Erin Road.

Generally, between 20-30 millimeters fell in isolated areas where street flooding had been observed.

As the afternoon progressed, winds from the south and outflow from the dissipating showers allowed for orographic effects along the East-West corridor to trigger more brief showers, with street flooding reported near the Tunapuna Market.

Outflow boundaries, where gusts from dissipating showers meet, converge and rise, also triggered more showers across parts of interior Central and Southern Trinidad.

While conditions are forecast to settle by the late afternoon into the evening, with mostly cloudy conditions persisting, showers remain in the forecast through the next 24-48 hours as a low-level trough approaches the area. Note that this trough system is not a tropical wave, nor will it bring the Intertropical Convergence Zone across Trinidad and Tobago. Hence, it is still not the start of the 2020 Wet Season.

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