Northwestern Puerto Rico out 10nm Marine Forecast
| Rest Of Today...South Winds 5 To 10 Knots, Increasing To 10 To 15 Knots With Gusts Up To 20 Knots This Afternoon. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: North 3 Feet At 8 Seconds And Southwest 1 Foot At 4 Seconds. Scattered Showers Late This Morning, Then Isolated Showers Early This Afternoon. Scattered Showers Late. |
| Tonight...Southeast Winds 10 To 15 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet. Wave Detail: North 4 Feet At 8 Seconds And South 1 Foot At 3 Seconds. Scattered Showers In The Evening. |
| Sunday...Southeast Winds 5 To 10 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: Northeast 5 Feet At 9 Seconds And Northwest 3 Feet At 9 Seconds. Scattered Showers. |
| Sunday Night...East Winds 5 To 10 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: Northeast 3 Feet At 9 Seconds And North 3 Feet At 9 Seconds. |
| Monday...East Winds Around 5 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: North 3 Feet At 11 Seconds And Southwest 1 Foot At 4 Seconds. Scattered Showers In The Afternoon. |
| Monday Night...Northeast Winds 10 To 15 Knots With Gusts Up To 20 Knots, Becoming East 5 To 10 Knots After Midnight. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: North 3 Feet At 11 Seconds. |
| Tuesday...East Winds 5 To 10 Knots, Becoming Northeast 10 To 15 Knots In The Afternoon. Seas 3 To 5 Feet, Occasionally To 6 Feet. |
| Tuesday Night...Northeast Winds 10 To 15 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. |
| Wednesday...Northeast Winds 10 To 15 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Scattered Showers In The Afternoon. |
| Wednesday Night...East Winds 15 To 20 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. |
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Area Forecast Discussion ...UPDATED National Weather Service San Juan PR 1245pm AST Sat Dec 14 2024 The center of the surface low has moved to a position north of the Mona channel, northwest of Aguadilla. This has allowed a slot of drier air to move into the forecast area. So although the forecast was correct in the position of the best rains the amount and coverage has had to have been lowered. This will also eliminate any expectation of flooding for the day. Southeast to south flow has moved over the area, but some cloudiness has prevented a rapid warm-up of temperatures such that no temperatures in the islands have reached 90 degrees yet. /issued 445am AST Sat Dec 14 2024/ SYNOPSIS... Today, winds will shift from the south to southeast gradually diminishing through the weekend. Additional isolated to scattered showers are expected to reach the islands at times today, particularly across southern and eastern Puerto Rico. Hazardous seas for small crafts along the offshore and nearshore Atlantic, with a high rip current risk for the north facing beaches of Puerto Rico continue at least through early next week. Another northeasterly swell is anticipated by midweek. SHORT TERM...Today through Monday... Shower activity was limited across the islands during the night, but some managed to reach the local islands. Stronger showers were observed in the local waters between Culebra and Fajardo. In the recent satellite imagery, the main circulation of the trough is evident about 150 to 200 miles north of Puerto Rico. Although the area of better moisture should remain over the waters, additional showers are expected to reach the islands at times. The winds will shift from the south early this morning, so the focus of the rain activity will be switched to southern Puerto Rico and the Virgin Islands. The steering flow is a lot weaker this morning too, with speeds of 4-8 kts, but with gusts around 12 knots. For the rest of the period, and as the surface trough moves into the Dominican Republic, a deep-layered southeasterly wind flow will get established. Plenty of moisture will flow into the islands too, with precipitable water values above the climatological value. With these winds, temperature are expected to be a little bit above normal again, while the potential for showers will persist. The areas more affected, as usual, are the eastern and southeastern portions of Puerto Rico, and the Virgin Islands. Widespread flooding is not anticipated, but some isolated urban floods cannot be ruled out. Long TermTuesday through Saturday... Based on the latest meteorological models, a surface high pressure will dominate the central Atlantic during the beginning of the long-term period. We will experience east to southeast winds across our forecast area, with moisture levels fluctuating between normal and above-normal values for this time of the year as tropical moisture and disturbances in the trade winds persist over the region. In general, atmospheric conditions are not expected to be highly favorable for strong convection, but moisture will increase between 700 and 500 mb, especially from Thursday through Saturday. Overall, expect morning showers across the U.S. Virgin Islands and eastern Puerto Rico at times. Shower activity may also develop and concentrate across the interior and western sectors of Puerto Rico each afternoon, resulting in wet roads and ponding of water in roadways and low-lying areas. While major flooding is not expected at the moment, isolated urban and small stream flooding cannot be ruled out of the forecast. AVIATION... SHRA (rain showers) will move across the local terminals today as a trough moves north of the islands. Winds are from the S at the USVI terminals, and S winds are expected along all terminals by 12-14Z, at speeds of 5-8 kts. SHRA (rain showers) in the terminals will result in brief periods of reduced VIS and low ceilings. Marine An area of low pressure and surface trough located north of the region are moving west-southwestward, resulting in isolated to scattered showers and over the local waters through the weekend. Additionally, hazardous marine conditions for small craft are expected to continue across the coastal and offshore Atlantic waters through at least late tonight and late Sunday, respectively, due to a northeasterly swell. Winds are expected to shift from the south- southeast today and remain from that direction over the next few days. Another northeasterly swell is anticipated to spread across the local Atlantic waters by midweek, with hazardous seas returning. Beach Forecast Beachgoers, a high rip current risk across the north-facing beaches of Puerto Rico is expected to continue today and at least through early next week. Elsewhere, a low to moderate rip current risk is anticipated. Around mid week, high risk of rip currents is expected to return along the northern beaches of the islands due to an approaching northeasterly swell. For more details, please refer to the Surf Zone Forecast for Puerto Rico and the U.S. Virgin Islands (SRFSJU). .SJU WATCHES/WARNINGS/ADVISORIES... PR...High Rip Current Risk through late Sunday night for PRZ001-002- 005-008. High Rip Current Risk until 6pm AST this evening for PRZ012. VI...None. AM...Small Craft Advisory until noon AST Monday for AMZ711. Small Craft Advisory until 6pm AST Sunday for AMZ712-741. Small Craft Advisory until 6pm AST this evening for AMZ716. Small Craft Advisory from 6pm this evening to 6am AST Sunday for AMZ742. |
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