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USVI and Puerto Rico to Experience Increased Rainfall Late May Through Early June

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The National Weather Service in San Juan anticipates an elevated likelihood of increased rainfall for the U.S. Virgin Islands and Puerto Rico from May 22 to June 4. During this period, the probability of receiving rainfall above the seasonal average is expected to surpass 50%, with certain locales facing even higher chances, exceeding 65% and reaching up to 80%.

Despite the forecast suggesting a particularly moist stretch ahead, the National Weather Service reassures that this does not inherently signal a severe risk of extensive flooding. Nevertheless, it is essential for residents and governing bodies to revisit and refine their strategies for coping with potential excessive rainfall and flood scenarios.

This forecast is part of the broader insights provided by the Climate Prediction Center, which delivers weekly updates based on a seven-day observational cycle. These updates are crucial for preparing and mitigating impacts in U.S.-affiliated regions.

Detailed Rainfall Projections:

  • May 22 – May 28, 2024
    • Probability of above-normal rainfall:
      • More than 50%
      • More than 65%
      • Up to 80%
  • May 29 – June 4, 2024
    • Probability of above-normal rainfall:
      • More than 50%
      • More than 65%
      • Up to 80%
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Weather

Elevated Health Risks Prompt Advisory Against Using Coastal Waters During Storms

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With forecasts predicting heavy rainfall and potential flooding, the Virgin Islands Department of Planning and Natural Resources (DPNR) has issued an advisory for the public to avoid using coastal waters across the territory until further notice.

Parents are specifically urged to keep children away from beaches affected by storm water and from areas with manholes or flooding. The advisory highlights the elevated health risks due to increased concentrations of bacteria in storm water runoff, which can include puddles, ghuts, and drainage basins that may also carry harmful contaminants and pollutants.

DPNR has committed to ongoing monitoring of the affected areas and waters to ensure public safety.

Contractors, developers, and home builders are reminded to implement and maintain enhanced erosion and sediment control measures at disturbed properties. The recommended practices include:

  • Preservation of natural vegetation
  • Drainage swales and diversions
  • Temporary and permanent seeding
  • Soil sealers and binders
  • Erosion control mats
  • Soil retaining walls
  • Proper construction entrances and exits
  • Silt fencing
  • Sediment traps
  • Mulches, mats, and geotextiles

Additionally, all construction materials and equipment should be secured or removed to prevent them from becoming airborne hazards during storms.

For reporting areas of concern, contact the Division of Environmental Protection Earth Change Program at (340) 774-3320 or (340) 773-1082.

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Weather Service Issues Flood Warnings for USVI and Puerto Rico

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The National Weather Service in San Juan has issued an alert for heavy rain and potential flooding affecting Puerto Rico and the Virgin Islands, starting Wednesday.

Forecasts indicate that a combination of an upper-level trough and a developing surface low-pressure system will bring substantial moisture to the region, increasing the likelihood of flooding as the week progresses.

The anticipated weather pattern includes multiple rain episodes, beginning with showers arriving from the Caribbean Sea into the Virgin Islands and spreading across southern and eastern Puerto Rico on Wednesday. A second wave of rain is expected on Thursday, with lingering effects potentially extending into Friday.

Meteorologists warn that sustained periods of moderate to heavy rainfall could elevate the risks of river overflows, flash floods, and mudslides. Residents and visitors, particularly those in flood-prone areas, are advised to stay informed with weather updates and prepare for swiftly changing conditions.

This moisture-laden system is predicted to persist through at least late Saturday, maintaining the heightened risk of flooding throughout the period.

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Alert Issued for Coastal Hazards in Puerto Rico and the U.S. Virgin Islands

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The National Weather Service has sounded the alarm for Puerto Rico and the U.S. Virgin Islands, warning of coastal and marine dangers set to impact the areas from April 9 to April 13. The advisories underscore the risks of tumultuous seas and vigorous winds that could challenge the safety of those on small vessels and individuals planning to visit the beaches.

During the interval from Tuesday to Friday, the seas are anticipated to swell to heights of 8 feet, with the force of the waves reaching similar peaks. Winds are expected to surge, blowing steadily at speeds of 15 to 20 knots and gusting up to 30 knots. A marginal easing is predicted by Saturday, with sea levels possibly reducing to 7 feet and wave heights to 5 feet, while winds could maintain their intensity but with gusts slightly decreasing to 25 knots.

The current maritime forecast has initiated advisories for hazardous seas for small crafts, which could extend over the week, alongside a pronounced warning of high-risk rip currents. These currents are deemed perilous, capable of overpowering even adept swimmers and making it difficult for them to safely return to shore.

The tumultuous conditions are a result of northerly swells paired with moderate to locally intense trade winds. The anticipated hazardous seas are set to affect the offshore Atlantic waters by Tuesday evening, progressively reaching the northern coastal waters of Puerto Rico and the U.S. Virgin Islands, encompassing the Mona and Anegada Passages, by Wednesday. Although advisories for small crafts are in effect until late Thursday night, the expectation is for these challenging conditions to linger into the weekend.

The onset of life-threatening rip currents is also forecasted, starting from northern Puerto Rico by Tuesday evening and expanding to western Puerto Rico, Culebra, and the northern reaches of the USVI by Wednesday. The high risk associated with these rip currents is projected to last until late Thursday night, with a continuation of the hazardous conditions likely through the weekend. Wednesday could also see heightened surf conditions.

The National Weather Service cautions against the potential repercussions, which span hazardous seas for small crafts, rip currents with the power to drag swimmers into deeper waters, perilous surf and swimming conditions, and the risk of localized coastal flooding and beach erosion. It’s crucial for both residents and visitors to heed these warnings, remain vigilant, and stay updated on weather developments throughout this period.

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