Downpours to Drench the Caribbean This Week

By Evan Duffey, Meteorologist
May 28, 2013; 9:30 AM ET
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A large mass of tropical moisture will continue to impact the Caribbean Sea to South Florida through the end of the week, bringing drenching downpours.

As a result, a majority of the islands' residents are at risk for flooding and other issues provided by such consistent and heavy rainfall.

High pressure over Bermuda is expected to strengthen , while broad low pressure near Central America will push moisture north out of South America.

Colliding winds will be found over the Greater Antilles through the week, resulting in heavy showers and thunderstorms.

Activity across the region will be both more numerous and heavier than normal this week. Any individual storm could bring the potential for significant rainfall and as a result, flash flooding.

Urban, low lying, and poor drainage areas will be under the greatest threat this week from flash flooding.

As the rains continue to pile onto the region, mudslides will become an increasing threat to the region. Soils will eventually become saturated enough that it will be allowed to give way. In the higher terrain of the Greater Antilles, this spells mudslides.

To make matters worse, much of the Caribbean has already seen above-normal precipitation this month. The normal precipitation for San Juan for the month of May is 8.05 inches (20.45 centimeters). San Juan has already seen 10.30 inches (26.16 centimeters) on the month, and this week will certainly see that total rise.

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While some residents may welcome the rain, vacationers in the region may not be happy to hear that the wet pattern may linger for an extended period. The high moisture seems to be locked up over the Greater Antilles through this week and perhaps into the weekend.

Next week, this moisture could develop into a tropical system somewhere from the northwestern Caribbean to the southeastern Gulf of Mexico. If something were to develop, interests western Cuba to Yucatan, Mexico and the southeastern United States could be impacted directly or indirectly.

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