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| No data for this date - Showing most recent prior to 07-13-2025 HWOSJU) and it`s graphical format (weather.gov/erh/ghwo?wfo=sju) for more information. .LONG TERM...Tuesday trough Saturday...From Prev Discussion... The long-term forecast remains on track. According to the NASA Goddard Earth Observing System Model V5, a dense plume of Saharan Air Layer (SAL) will continue to affect the northeastern Caribbean through midweek. The model indicates that the highest concentrations are expected early in the period, with aerosol optical thickness values nearing 0.5. This pattern will result in hazy skies, reduced visibilities, and deteriorated air quality through at least Wednesday. Although the most intense dust presence is forecast for the first part of the week, low to moderate concentrations are expected to linger into the upcoming weekend. Residents and visitors, particularly those with respiratory conditions, are advised to take appropriate health precautions during this period. At the surface, a high-pressure system will promote southeasterly winds through Tuesday, gradually shifting from the east as the high moves into the central Atlantic. A mid- to upper-level ridge is forecast to strengthen over the region during the early part of the week, favoring a drier and more stable environment aloft. Precipitable water values will remain below climatological normals, near or below 1.5 inches, limiting overall shower activity across the area. However, locally induced showers and isolated thunderstorms remain possible each afternoon across western Puerto Rico, due to diurnal heating and local effects. Temperatures will remain above normal, with highs ranging from the upper 80s to low 90s Fahrenheit in coastal and urban areas, and in the low 80s across higher elevations. Heat indices may exceed 108F during the peak of the event, particularly across north-central Puerto Rico. These hot and dry conditions, combined with poor air quality, could pose additional health risks, especially for the more vulnerable populations. && .AVIATION... (18Z TAFs) Mainly VFR conditions are expected to prevail across all terminals during the next 24 hours. However, brief SHRA/TSRA this afternoon may cause tempo MVFR cigs at TJBQ/TJSJ thru 31/22z. The 31/12z TJSJ sounding indicated ESE winds up to 19 kt blo FL100. HZ due to Saharan dust will gradually move across the local area tonight, and linger through at least early Wednesday. VSBY could drop to around 6SM during the next few days. && .MARINE... A surface high pressure building over the Atlantic Basin will continue to promote moderate to locally fresh trade winds over the next few days. Southeast winds will prevail through the weekend, becoming more easterly early next week. Small craft should exercise caution across portions of the offshore waters and local Caribbean passages. Hazy skies and reduced visibilities are expected through mid-week as another dense plume of Saharan dust moves toward the area. && .BEACH FORECAST... A moderate risk of rip currents will continue across the south to southeast beaches of the islands through the rest of the weekend. Elsewhere, the risk remains low. Nonetheless, swimmers are urged to use caution, especially near piers, reefs, and other structures where dangerous rip currents are more likely to form unexpectedly. && .SJU WATCHES/WARNINGS/ADVISORIES... PR...Heat Advisory until 4 PM AST this afternoon for PRZ001-005-008- 010. VI...None. AM...None. && $$ |
