Atlantic Hurricane Season 2020 Storm Names
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Hurricane Season runs from June 1-November 30
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Weather Summary for Puerto Rico
273 FXCA62 TJSJ 291815 AFDSJU Area Forecast Discussion National Weather Service San Juan PR 215 PM AST Sun Mar 29 2026 ...New SHORT TERM, AVIATION, MARINE, BEACH FORECAST... .KEY MESSAGES... Issued at 207 PM AST Sun Mar 29 2026 * Mainly fair weather is expected across the U.S. Virgin Islands and Puerto Rico through the next few days. However, passing trade wind showers will bring brief periods of rain, especially Monday through Tuesday. * Localized afternoon showers are expected over southwest Puerto Rico today, followed by increasing overnight and morning showers across windward areas as moisture increases. * A weak frontal boundary will increase moisture and instability by Tuesday, increasing the likelihood of showers and isolated thunderstorms, mainly Tuesday afternoon into evening. * Hazardous marine and coastal conditions will develop late Monday through at least Thursday, driven by a long-period northerly swell and strengthening winds, resulting in a high surf, life- threatening rip currents, and possible Small Craft Advisory conditions. && .Short Term(This evening through Tuesday)... Issued at 207 PM AST Sun Mar 29 2026 Fair weather prevailed today across Puerto Rico and the U.S. Virgin Islands, with little to no rainfall. Winds were from the northeast at 5 to 15 mph. Despite generally dry conditions, a few passing showers developed over windward areas. By midday, cloudiness increased across the mountains and southern slopes, particularly in southwestern Puerto Rico, with streamers moving from the U.S. Virgin Islands into nearby waters. Temperatures reached the mid-80s in coastal and urban areas and the upper 70s in the mountains. Although drier air is moving into the region, isolated afternoon showers remain possible, mainly across southwestern Puerto Rico and the southern slopes. Brief trade wind showers may also continue at times over windward areas. Looking ahead, northeasterly winds will persist through Monday and Tuesday, bringing periodic increases in moisture. Winds are expected to strengthen Monday evening as a frontal boundary approaches. This will allow moisture to build across the region, leading to more frequent showers. The highest chances of rainfall are expected: early Monday morning, Monday afternoon, Late Monday night into early Tuesday, and Tuesday afternoon. By Tuesday afternoon, lingering moisture associated with a surface trough low off to the northeast over the Atlantic, along with the approaching frontal boundary, may further enhance shower activity and the potential for thunderstorms, elevating the flooding risk for the islands. Meanwhile, hazardous coastal conditions will develop, especially along north-facing beaches of Puerto Rico and the U.S. Virgin Islands. A long-period northerly swell will bring: High surf, Life-threatening rip currents, and Possible coastal erosion. If you plan to visit the beach, use extreme caution and consider south- or Caribbean-facing beaches, where conditions are safer. && .LONG TERM... Issued at 433 AM AST Sun Mar 29 2026 High pressure centered well north in the Atlantic and an induced surface trough northeast of the islands will maintain a strong northeasterly wind flow through the end of the week. As the surface trough moves north of the island on Friday and the weekend, the winds will shift from the southeast. It will be breezy through at least Thursday, with speeds of 15 to 20 knots. On Wednesday and Thursday, under the northeasterly wind flow, the surface trough will push a drier air mass above the 700 mb-layer into the northeastern Caribbean. As a result, precipitable water values will drop to near normal values for this time of the year. On these days, the focus of rain should be in the northeast and the Virgin Islands early in the day, followed by stronger showers in the afternoon for the interior and southwest. The atmosphere does not look particularly favorable for heavy rainfall accumulations, although the mid-levels will be cool enough for at least for isolated lightning each afternoon. Moving into the end of the week and the weekend, a new upper level low will dig from the southeastern United States. For Friday and Saturday, the latest guidance show a vorticity maximum at the upper levels, with some low level convergence too. However, some dry intrusion persist in the mid-levels. Since the winds will shift from the southeast, diurnal heating is expected to be stronger. Therefore, there is a medium chance that showers may grow enough to break through the drier air, and reaching the favorable conditions aloft. For now, the forecast call for stronger thunderstorms in the afternoon hours, but moderate rainfall accumulations, focused along the interior and western municipalities of Puerto Rico. && .AVIATION... (18Z TAFS) Issued at 207 PM AST Sun Mar 29 2026 VFR conditions across all TAF sites. Aft convection will bring VCSH over TJPS, TJSJ, and TIST btwn 29/18-23Z. Additional, showers will affect TJSJ, TJBQ, and TIST from 30/03-12Z, as pockets of moisture filters inland. Winds will strengthen from tomorrow onwards btwn 15- 20 kt with higher gusts at times. && .MARINE... Issued at 207 PM AST Sun Mar 29 2026 A surface trough north of the region will maintain moderate to locally fresh northeasterly winds across the local waters through Monday, promoting choppy seas. An approaching frontal boundary from the western Atlantic will interact with available moisture, leading to increasing shower activity, particularly from late Monday into Tuesday. A long-period northerly swell combined with strengthening winds will result in deteriorating marine conditions beginning late Monday night and continuing through much of the Spring Break week. Hazardous seas are expected, with conditions becoming dangerous for small craft operators. && .BEACH FORECAST... Issued at 207 PM AST Sun Mar 29 2026 A moderate risk of rip currents is expected along north-facing beaches of Puerto Rico and the U.S. Virgin Islands, while a low risk will persist along south-facing beaches. Conditions are expected to worsen from Monday evening through Friday due to the arrival of a long-period northerly swell combined with breezy to windy trade winds. This combination is likely to create life-threatening rip currents and dangerous high- surf conditions along the north-facing exposed coastlines. Beachgoers should exercise caution and remain aware of changing marine conditions. Always swim near a lifeguard and follow local safety guidance. && .SJU WATCHES/WARNINGS/ADVISORIES... PR...None. VI...None. AM...None. && $$ SHORT TERM...CAM LONG TERM....ERG AVIATION...MMC |
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