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U.S. Virgin Islands and Puerto Rico Brace for Severe Weather Due to Approaching AL90 Tropical Wave



The San Juan branch of the National Weather Service has released a fresh advisory alert regarding imminent severe weather conditions targeting both the U.S. Virgin Islands and Puerto Rico. A combination of high pressure over the west central Atlantic and the incoming tropical wave AL90 is anticipated to drive a consistent moderate to strong northeastern wind flow throughout the day.

Rising Concerns Over Flash Floods and Landslides

From late tonight, cloud cover, showers, and storms tied to AL90 are forecasted to amplify, engulfing both Puerto Rico and the U.S. Virgin Islands. This change in weather is set to linger until mid-week. The predicted downpours intensify concerns over urban and stream flooding, including potential flash floods, landslides, and swift river level surges. Locals are advised to keep a vigilant eye on AL90’s trajectory, as recent updates from Miami’s National Hurricane Center suggest a moderate to high likelihood of its development in the coming 2-7 days.

Immediate Forecast: Transition from Mild Showers to Intense Rains

Earlier in the day, brief showers graced regions of Puerto Rico and St. Croix, causing little to no disturbance. Today’s atmospheric conditions, characterized by winds reaching speeds of 20 mph and gusts touching 25 mph, are believed to be the calmest in the forthcoming days. As the day progresses, intermittent showers are foreseen, potentially intensifying during the afternoon, especially over the southwestern parts of Puerto Rico. Nevertheless, AL90’s looming presence is set to make conditions more turbulent overnight.

Week’s Forecast: Brace for Heavy Downpours

With the encroaching AL90, significant rainfall is on the horizon for the eastern regions starting Monday, escalating in severity as nighttime approaches. Residents are alerted to potential hazards such as flash floods, landslides, gusty winds, and frequent lightning strikes. Consequently, a moderate flood risk alert has been declared for the U.S. Virgin Islands, Culebra, Vieques, and the eastern, southern, and southeastern sections of Puerto Rico.

Long-range Forecast: Persistent Weather Challenges

Model predictions show some discrepancies regarding the extended forecast. However, a prevailing consensus points toward a moist and volatile atmosphere enveloping the region up until at least Thursday. This implies sustained risks for showers and storms over the islands and neighboring waters. Come the weekend, a shift is expected as the weather morphs into a more familiar summertime pattern – characterized by heat, humidity, and diminished rain and storm prospects.

Mariners’ Advisory

Mariners are advised to exercise caution. The sea is expected to present challenging conditions for small vessels, with swelling seas reaching heights of up to 7 feet and winds ranging between 25-30 knots. A Small Craft Advisory will remain in place until at least Tuesday evening, emphasizing the need for heightened vigilance.

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Rainfall and Flood Alerts Impact St. Croix Activities, Continuing Through Thursday



On Wednesday, St. Croix experienced significant interruptions to its daily activities due to persistent rainfall, leading to the unusual quiet of rain-soaked streets replacing the usual hustle and bustle of school and work life.

The Department of Education took proactive measures by announcing the closure of schools throughout the territory early in the morning, following notifications to parents the previous evening about the potential disruption. They also advised students who commute between the islands of St. Thomas and St. John to avoid the ferry journey.

Legal proceedings on St. Croix faced adjustments as well, with the judiciary declaring an early closure for the Superior Court starting at noon, and subsequently, all court facilities on the island were shut down by 2:30 pm due to the relentless rainfall. Non-essential government employees were directed to head home at 2:00 pm, prioritizing safety amidst worsening conditions.

Social media platforms featured videos of cars navigating waterlogged roads, highlighting the challenges posed by overflowing gutters and gullies unable to cope with the heavy downpour.

The National Weather Service (NWS) in San Juan projected that the weather conditions causing the deluge on Wednesday would extend into Thursday. The NWS issued warnings for Puerto Rico and the Virgin Islands, cautioning of “heavy showers and thunderstorms” that may persist. The aftermath of the weather system is expected to introduce “winds and pulses of a long-period northerly swell” affecting the region through the weekend, according to the NWS.

Mariangelis Marrero-Colón, an NWS PR Meteorologist, emphasized the ongoing risk of substantial rainfall across the islands until early Thursday. “The areas poised for the greatest impact include the southern, interior, and eastern regions of Puerto Rico, along with the entirety of the U.S. Virgin Islands,” she noted, pointing out concerns over urban and flash flooding, river surges, mudslides, and the possibility of strong winds accompanying severe showers and thunderstorms.

Rainfall estimates suggest accumulations could reach up to 3 inches across the affected areas, with a higher potential in specific locales. This situation has prompted the NWS to maintain a moderate flood risk advisory. Additionally, boating conditions are expected to be hazardous, with a small craft advisory in effect through the weekend and possibly extending into the following week.

Beachgoers are cautioned against dangerous swimming conditions, especially at beaches facing north, where life-threatening rip currents are expected to be a significant risk at least until Sunday.

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National Weather Service Announces Hazardous Weather Outlook for the US Virgin Islands



The National Weather Service in San Juan has issued a Hazardous Weather Outlook for the U.S. Virgin Islands, encompassing St. Thomas, St. John, St. Croix, and the surrounding nearshore Atlantic and Caribbean waters.

Inhabitants and visitors in the USVI are advised to brace for robust windy conditions throughout the day and into the evening. Outdoor objects are at risk of damage or may be swept away due to the prevailing strong winds.

Sea-farers are urged to proceed with caution as oceanic conditions are expected to intensify, with seas predicted to surge to heights of 8-10 feet. Wind velocities are anticipated to range from 15-25 knots, accompanied by gusts reaching up to 30 knots, posing significant risks to smaller vessels.

Additionally, there’s an elevated risk of perilous rip currents in most local beach surf zones. Beach enthusiasts are strongly advised to exercise utmost caution or consider refraining from water activities.

Forecast for Friday through Wednesday

The weather outlook extending into the next several days suggests that the breezy to windy conditions will persist, accompanied by a northerly swell. These elements are forecasted to maintain hazardous marine conditions for small craft, with sea levels expected to stay elevated at 8-10 feet. Beachgoers are particularly warned about life-threatening rip currents and breaking waves measuring 6-8 feet during the workweek.

While a gradual improvement in conditions is anticipated over the weekend, a high risk of rip currents will likely persist into Saturday. This risk is expected to decrease moderately from Sunday onwards into the early part of next week. Both residents and visitors are encouraged to keep abreast of the latest weather updates and to exercise caution during this period of hazardous weather conditions.

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Hazardous Marine Conditions Expected in USVI and Puerto Rico: Forecasts Predict Waves Up to 9 Feet



The U.S. Virgin Islands and Puerto Rico are on alert for a period of hazardous marine conditions, as forecasted by the National Weather Service. This alert, issued on Sunday evening, is expected to persist throughout the workweek.

Triggered by northerly swells impacting the Atlantic waters and neighboring passages, the region is gearing up for challenging marine conditions. Boaters in these areas are advised to prepare for waves ranging from 5 to 7 feet, with potential surges reaching up to 9 feet. Wind conditions are also set to intensify, with speeds of 15-20 knots and gusts possibly hitting 30 knots. The National Weather Service has issued Small Craft Advisories for the Atlantic waters, including the Anegada and Mona Passages. By midweek, waves are anticipated to grow further, potentially reaching heights of 6-8 feet.

The heightened risk of life-threatening rip currents is a significant concern for beachgoers. With breaking waves expected to reach 6-9 feet and occasional higher breakers, the northern coasts of Puerto Rico, Culebra, and the U.S. Virgin Islands are particularly vulnerable. A High Rip Current Risk advisory is in effect for these areas, and the possibility of a High Surf Advisory being issued remains if conditions escalate.

The public is strongly encouraged to exercise caution near water bodies during this period. Boaters are advised to delay their sea outings until conditions stabilize, and swimmers should avoid beaches with a high risk of rip currents. Updates and further advisories will be issued by the National Weather Service as they continue to monitor the evolving situation.

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