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Show Special Advisory - San Juan, PR (Puerto Rico) Selection: |
| No data for this date - Showing most recent prior to 07-05-2025 NPWSJU) for more information about the WIND ADVISORY. A Public Information Statement (PNSSJU) was issued around noon with the highest wind gusts reports, we plan to issue another PNSSJU at around 900 PM AST. .LONG TERM...Saturday through Wednesday... ./FROM PREV DISCUSSION...Issued at 500 AM AST Wed Apr 2 2025/ At the beginning of the long-term period, conditions will remain breezy but are anticipated to follow a decreasing trend. At the same time, this will allow hazardous marine and coastal conditions to gradually improve, at least from Saturday night through at least next Monday. Model guidance continues to suggest that a surface high-pressure system over the western Atlantic will move eastward into the Central Atlantic, promoting east to northeast winds through Sunday. These winds will then become more easterly early next week. Meanwhile, a mid-level ridge will dominate to the north and west of the forecast area, while troughing develops and persists over the region through the forecast period. This will promote ventilation and cooler temperatures aloft, with 500 mb temperatures remaining between -8C to -10C by the weekend. These conditions will support favorable conditions for deep convection and increase the chances of thunderstorm development. However, a significant drop in moisture content across different levels of the atmosphere is expected to inhibit significant rainfall and afternoon thunderstorms. The latest models still show uncertainty and disagree on the amount and timing of precipitation at this moment and we will continue to monitor and adjust the forecast accordingly. Throughout the forecast period, the latest models suggest that precipitable water values will oscillate between below 1.0 and 1.5 inches, which is considered below normal to near average. As a result, activity will likely depend on the arrival of patches of moisture, leading to periods of sunshine and passing showers. Isolated to scattered showers, with a thunderstorm or two, cannot be ruled out during the afternoon hours across the western portions of Puerto Rico, but at the moment, significant accumulations are not expected. && .AVIATION... (18Z TAFs) VFR conditions will prevail, but SHRA/+SHRA could sometimes impact local terminals, producing brief MVFR or IFR conditions, especially across windward locations. Winds will remain mainly from the E at 20- 25 kt, with gusts between 30 and 40 knots, but could be higher. Winds from the E/ENE will be around 15 knots after 02/13z overnight but will increase again tomorrow after 03/13z. Thus, a Wind Advisory is in effect for the islands. && .MARINE... A surface high pressure over the Atlantic basin will continue to promote fresh to locally strong easterly winds throughout the week. Thursday and Friday are expected to be the windiest days of the week. Seas will continue to build between 6 and 9 feet, and occasionally higher, across the regional waters. As a result, hazardous seas are anticipated through the forecast period. Isolated to scattered shower activity will continue over the next few days. Small Craft Advisories are currently in effect, please refer to the latest Marine Weather Message (MWWSJU) and Coastal Waters Forecast (CWFSJU) for more information. && .BEACH FORECAST... Strong winds are deteriorating coastal conditions. Through at least Saturday afternoon, there is a high risk of rip currents for the north-facing beaches of Puerto Rico, from Aguadilla to Fajardo, Culebra and the U.S. Virgin Islands. For tomorrow morning through at least Friday evening there will be a high rip current risk for the beaches of southeastern Puerto Rico, from Salinas to Yabucoa, and Vieques. A moderate risk is in place for most other beaches. Please refer to the latest Coastal Hazard Message (CFWSJU) and Surf Zone Forecast (SRFSJU) for more information. Rip currents are powerful channels of water flowing quickly away from shore, which occur most often at low spots or breaks in the sandbar and in the vicinity of structures such as groins, jetties and piers. They can sweep even the best swimmers away from shore into deeper water, where it becomes difficult to return to safety. Heed the advice of lifeguards, beach patrol flags and signs. If you become caught in a rip current, yell for help. Remain calm, do not exhaust yourself and stay afloat while waiting for help. If you have to swim out of a rip current, swim parallel to shore and back toward the beach when possible. Do not attempt to swim directly against a rip current as you will tire quickly. && .SJU WATCHES/WARNINGS/ADVISORIES... PR...High Rip Current Risk through Saturday afternoon for PRZ001-002- 005-008-012. Wind Advisory until 8 PM AST Friday for PRZ001>013. High Rip Current Risk from Thursday morning through Friday evening for PRZ003-013. VI...High Rip Current Risk through Saturday afternoon for VIZ001-002. Wind Advisory until 8 PM AST Friday for VIZ001-002. AM...Small Craft Advisory until noon AST Saturday for AMZ711-712-716- 723-726-733-741. Small Craft Advisory until 6 AM AST Friday for AMZ735-742-745. && $$ |
