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Show Special Advisory - San Juan, PR (Puerto Rico) Selection: |
| No data for this date - Showing most recent prior to 10-18-2024 NPWSJU) is in effect for portions of northern and western PR, and St. Croix. The precipitable water (PWAT) content is expected to peak today between 2.00-2.20 inches, with a drying trend expected from late Tuesday and Wednesday as the layered ridge over Bahamas sinks southwards over Hispaniola and into the local area. PWAT is expected to bottom out between 1.40-1.70 inches by early Wednesday morning. LONG TERM...Thursday through Monday... On Thursday, a weak mid-level high pressure over the western Atlantic will sink further into the north-central Caribbean. Additionally, 500 mb temperatures will warm between -3 and -4 degrees. This could potentially inhibit convective activity across the forecast area. However, moisture content is expected to increase. Model guidance suggests precipitable water content will surge above 2.0 inches, even reaching up to 2.2 inches, which is near to above the climatological normal. Therefore, expect shower activity across interior Puerto Rico with a few very isolated thunderstorms. Afterwards, winds at the surface will remain light from ENE until Saturday due to a ridge to our west/northwest and a tropical cyclone over the far Tropical Atlantic, becoming variable by Sunday onwards. With a surge in low-level moisture and a mid-to-high level trough moving into the northeastern Caribbean by the end of this week into the weekend, shower and thunderstorm activity will increase once again mainly over the interior and southern sections of the islands for the forecast period. Slow moving showers will enhance rainfall accumulations across the area. Hence, a limited to elevated flooding risk can be anticipated. Ponding of water in roadways and poorly drained areas are likely, with urban and small stream flooding across interior Puerto Rico during the afternoon hours. Then, a mid-level ridge will move eastward and settles over the forecast area by Monday inhibiting shower activity for the most part. The combination of limited shower activity, clear skies, and subsidence aloft will promote hot temperatures for early next week. Limited to elevated heat risk will prevail for coastal and urban areas of PR and USVI. AVIATION... (06Z TAFS) Mainly VFR conditions expected across all terminals through the forecast period. However, diurnally induced afternoon SHRA/TSRA could lead to tempo MVFR to brief IFR conds at TJPS/TJBQ btw 30/18z- 22z. VCTS is possible across the rest of the terminals. Easterly winds expected up to 12 kt with sea breeze variations aft 30/14z. MARINE... A high pressure system over the western Atlantic will maintain light to gentle northeast to easterly winds. Seas will remain around 3 to 5 feet over the next few days. Showers and thunderstorms remain possible across the regional waters through the week. BEACH FORECAST... Nearshore buoys are indicating breaking waves of 6-8 feet with swell action continuing through at least this afternoon. Therefore, a High Rip Current Risk (CFWSJU) is in effect for the northeast to northwestern beaches of Puerto Rico, including Culebra. && .SJU WATCHES/WARNINGS/ADVISORIES... PR...High Rip Current Risk until 6 PM AST this evening for PRZ001-002- 005-008-010-012. Heat Advisory until 5 PM AST this afternoon for PRZ001-005-008- 010. VI...Heat Advisory until 5 PM AST this afternoon for VIZ002. AM...None. && $$ |
