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Saharan Dust Event Set to Affect U.S. Virgin Islands and Puerto Rico

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Satellite image showing Saharan dust advancing across the Tropical Atlantic. Credit: NOAA

Starting Tuesday, the National Weather Service (NWS) in San Juan has forecasted a significant plume of Saharan dust to reach Puerto Rico and the U.S. Virgin Islands. This event, categorized as moderate to severe, is expected to persist until at least Thursday, bringing various environmental and health challenges.

Residents in the affected areas should prepare for hazy skies and diminished visibility during the dust event. The NWS has reported that the dust plume, originating from the Sahara and Sahel deserts in Africa, will travel over 5,000 kilometers across the Atlantic Ocean, notably degrading air quality in the Caribbean.

The Saharan dust contains mineral particles that serve as a natural fertilizer for ecosystems but also pose health risks. The V.I. Department of Health warns that the dust can worsen existing health conditions, especially for immunocompromised individuals, the elderly, and young children. Health experts have observed increased respiratory issues during Saharan dust events, such as sinusitis, allergies, asthma, and bronchitis.

Common symptoms linked to Saharan dust exposure include:

  • Nose and throat irritation
  • Sinusitis
  • Allergies
  • Asthma exacerbation
  • Eye and skin irritation
  • Acute bronchitis
  • Risk of respiratory infection

To mitigate health risks during the dust event, residents are advised to:

  • Keep necessary medications on hand
  • Stay hydrated and wear light clothing
  • Avoid outdoor activities whenever possible
  • Use face masks and eyeglasses to protect against dust particles

The NWS will continue to monitor the situation and provide updates as necessary.

For the latest satellite imagery of the Tropical Atlantic and to track the dust plume’s progression, the public can view updates here.

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Weather

Tropical Wave to Affect Weather in USVI and Puerto Rico Starting Late Monday

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The National Hurricane Center (NHC) has announced that Tropical Wave AL95, also known as Invest 95L, is anticipated to enter the Caribbean Sea early next week. This system is expected to bring worsening marine and weather conditions to Puerto Rico and the U.S. Virgin Islands beginning late Monday and continuing into Tuesday.

Current model guidance indicates that AL95 is generating disorganized showers and thunderstorms several hundred miles west-southwest of the Cabo Verde Islands. However, environmental conditions are predicted to become favorable for development, with a tropical depression or tropical storm likely to form over the weekend. The system is moving westward at 15 to 20 mph and is expected to be several hundred miles east of the Windward Islands by the weekend.

The NHC has assessed the following probabilities for AL95’s development:

  • Formation chance through 48 hours: Medium (60 percent)
  • Formation chance through 7 days: High (80 percent)

The NHC advises that those in the Lesser Antilles, Puerto Rico, and the USVI should closely monitor the system’s progress. Given the dynamic and evolving nature of the situation, the next tropical weather outlook is scheduled for 8:00 p.m. AST. Residents are encouraged to stay informed and prepared as the system approaches.

Further updates and detailed briefings will be provided daily as the tropical wave advances.

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Weather

VITEMA Issues Excessive Heat Warning for USVI Amid Rising Temperatures

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On June 27, 2024, the Virgin Islands Territorial Emergency Management Agency (VITEMA) issued an excessive heat warning and heat advisories for the U.S. Virgin Islands. The warning comes as temperatures are expected to soar, with heat indexes potentially reaching dangerous levels over the next few days.

Heat Advisory Details

The National Weather Service (NWS) has indicated that daytime temperatures could climb to between 100 and 105 degrees Fahrenheit, with heat index values possibly exceeding 110 degrees Fahrenheit in certain areas. The warning emphasizes the severe health risks posed by prolonged exposure to such extreme conditions.

Health Risks and Safety Measures

Excessive heat warnings are typically issued when the heat index is forecasted to reach or exceed 105 degrees Fahrenheit for at least two consecutive days. During such conditions, the likelihood of heat-related illnesses, such as heat exhaustion and heat stroke, significantly increases. The combination of high temperatures and humidity can create a dangerous environment for residents and visitors, particularly the elderly, children, and individuals with pre-existing health conditions.

To mitigate the risks associated with the extreme heat, VITEMA and the American Red Cross have provided several safety recommendations:

  1. Stay Informed: Monitor local weather forecasts and stay updated on heat advisories and warnings.
  2. Stay Hydrated: Drink plenty of water, even if you do not feel thirsty, and avoid beverages containing caffeine or alcohol.
  3. Limit Outdoor Activities: Avoid strenuous activities during the hottest parts of the day, typically between 10 a.m. and 4 p.m.
  4. Seek Air Conditioning: Spend time in air-conditioned places such as shopping malls, libraries, or community centers. If your home lacks air conditioning, consider visiting these locations during peak heat hours.
  5. Check on Vulnerable Individuals: Regularly check on family, friends, and neighbors who do not have air conditioning or who are more susceptible to heat-related illnesses.

Community Preparedness

The community is encouraged to review and update their emergency plans, ensuring they are equipped to handle power outages that may accompany the excessive heat. Additionally, the NWS recommends keeping an emergency kit with essential items, including water, non-perishable food, and medications.

Pet owners should ensure their animals have access to plenty of water and shade, and never leave pets or children in parked vehicles, as temperatures inside can rise rapidly to lethal levels.

With temperatures expected to remain high over the next several days, it is crucial for residents and visitors in the U.S. Virgin Islands to take the necessary precautions to stay safe. By following the guidelines provided by VITEMA and the American Red Cross, the community can minimize the health risks posed by this extreme heat event.

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Weather

NHC Tracks Potential Tropical Depression in the Atlantic

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The National Hurricane Center (NHC) is closely monitoring a tropical wave situated several hundred miles southwest of the Cabo Verde Islands. This system is currently generating disorganized showers and thunderstorms.

As of Wednesday afternoon, the NHC indicated that development could occur over the next several days. Environmental conditions may become favorable for a tropical depression to form in the tropical Atlantic by the end of the week or over the weekend. The system is moving westward at a speed of 15 to 20 mph.

  • Formation chance through 48 hours: Low, near 10 percent.
  • Formation chance through 7 days: Medium, at 40 percent.

The NHC will continue to keep a close watch on this system and provide necessary updates. Residents and those with interests in the potential path of this system are advised to stay informed and prepare for possible tropical weather conditions.

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