Sunrise 5:48 AM   Sunset 6:49 PM Moonrise 11:38 AM   Moonset 12:15 AM

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AMZ725 Coastal Waters Of Southern Usvi Vieques And Eastern Puerto Rico Out 10 Nm- 929 Am Ast Wed Mar 8 2023
Rest of today - Southwest winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 11 seconds. Isolated showers.Tonight - West winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.Thursday - West winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas around 5 feet. Dominant period 10 seconds. Numerous showers.Thursday night - North winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 11 seconds. Scattered showers.Friday - North winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Isolated showers.Saturday - Southeast winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 12 seconds. Isolated showers.Sunday - South winds 5 to 10 knots, becoming east. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 12 seconds.

AMZ700 411 Am Ast Tue May 14 2024
Synopsis for puerto rico and the uS. Virgin islands waters - . A surface high pressure across the western atlantic and some influence of a surface trough will result in light to moderate winds with an easterly component. This wind flow will prevail for today into the upcoming days. Therefore, tranquil marine conditions will prevail in general for the next several days. Afternoon convective activity could move from the islands towards coastal waters, especially along western puerto rico.

FXCA62 TJSJ 140857 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 457 AM AST Tue May 14 2024

SYNOPSIS

Stable weather patterns will prevail for the next several days in the morning hours, followed by afternoon convection each day across the interior sections of the island. Clear to partly cloudy skies in the morning will allow warmer temperatures, increasing the heat indices across the northern sections. Although slightly warmer, heat indices will fluctuate between 102 and 107 degrees Fahrenheit. Therefore, residents should stay hydrated and tune for further updates. A similar pattern is forecasted until Thursday when surface winds will increase from the southeast. Instability will be a defining factor for the upcoming workweek, increasing the potential for shower development.

SHORT TERM
Today through Thursday...

Skies were mostly clear to partly cloudy overnight with isolated to scattered passing showers noted over the offshore coastal waters, and limited to no shower activity noted over land areas. Overnight low temperatures were in the upper 70s to low 80s along the coastal areas and near mid 60s to low 70s in higher elevations and valleys.
Surface winds were calm to light and variable.

Overall warm and mostly fair weather conditions are expected today for much of Puerto Rico and the adjacent islands including the U.S.
Virgin Islands. Under a fairly light east southeast wind flow and mostly sunny skies, daytime highs will reach the upper 80s to low 90s along the coastal areas with maximum heat indices to range between 100 and 107 degrees particularly along the northwest to north coastal areas and in urban areas of Puerto Rico including Vieques, Culebra and portions of the U.S. Virgin Islands. Afternoon showers and possibly an isolated thunderstorm or two cannot be ruled out over portions of the central and west sections of Puerto Rico with the chance of locally heavy rains, which may lead to ponding of water on roads and in poorly drained areas and with the possibility of minor urban and small stream flooding in isolated spots. Fewer afternoon shower activity is expected elsewhere and only on the west- end and downwind of the U.S. Virgin Islands.

For the rest of the short-term period, a somewhat drier trend and more seasonal weather pattern is forecast as winds slightly increase and become more east to northeast by Wednesday and Thursday. A mid- to upper level high-pressure system will continue spread eastwards across the region from the west and southwest Atlantic, while a surface high pressure will build across the west Atlantic.
Consequently this will increase the trade wind cap inversion while eroding low level moisture. Recent analysis and NASA aerosol optical thickness continued to suggest only light concentrations of Saharan dust to persist at least through Wednesday. Latest model guidance as well as satellite derived analyses all suggest overall PWAT values to continue to diminish and range between 1.4 and 1.7 inches for today, then slightly increase to between 1.5-1.8 inches for the rest of the period as winds become more easterly and slightly increase.

That said, although the overall synoptic conditions are forecast to be less conducive for significant convective development, shower development and possibly an isolated thunderstorm will remain possible each afternoon especially over parts of the central interior and west sections of Puerto Rico locally steered by the east to northeast low level wind flow. Warm conditions and slightly above normal temperatures are expected to continue for the next few days with daytime temperatures peaking in the upper 80s to low 90s along the coastal and urban areas. Residents and visitors to the islands are urged to stay hydrated and limit direct sun exposure when possible.

LONG TERM
Friday through Tuesday...

The long-term forecast remains on track. A broad surface high- pressure extending from the north-central Atlantic into the Caribbean will maintain the east-southeasterly wind flow across the region. During the first section of the period, tropical moisture dragged by the surface winds and some instability (lower 250 mb height) will trigger afternoon convection each day. An induced surface trough will weaken the pressure gradient at the north, resulting in southeasterly light to moderate winds. Surface winds from the southeast will drive most of the showers across Puerto Rico's interior and northwestern quadrant. The most vigorous shower activity and the light steering flow would result in enough rainfall accumulation to cause a minor flooding threat.
By Monday into Tuesday, mid to upper-level conditions change, as a trough results in instability aloft and colder temperatures at the 500 mb level. According to the Galvez-Davison Index (GFS output), there is a high probability of experiment-isolated thunderstorms, especially in the afternoon hours each day. Given the expected conditions, the flood threat is forecast for the last part of the long-term.

AVIATION
(06Z TAFS)

VFR conds through the fcst prd. Isold-SCT SHRA mainly over the regional waters and en route to the islands. Mstly SCT lyrs nr FL028
FL050
FL250. Aftn SHRA/Psbl isold TSRA ovr ctrl and west interior sections of PR fm 14/18-22Z with VCSH psbl at TJBQ/TJSJ til 23Z. Calm to lgt/vrb wnds will become mainly fm E around 10-13 kts with ocnly hir gusts and sea breeze variations aft 14/14Z.

MARINE

A surface high-pressure system over the western Atlantic will continue to promote light to moderate easterly winds across the region. These conditions will lead to tranquil marine conditions for all the local waters, with seas up to 5 feet in the offshore waters and up to 4 feet in the coastal waters. Winds will continue from the east at 15 knots or less for the next several days, becoming more from the southeast due to a surface high pressure in the central Atlantic.Recent forecasts show tranquil marine conditions with seas up to 4 feet and periods of 8 seconds.
Therefore, there is a low rip current risk for the next several days across all the exposed coastal areas.

SJU WATCHES/WARNINGS/ADVISORIES
PR...None.
VI...None.
AM...None.

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Playa de Fajardo
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Tue -- 12:15 AM AST     Moonset
Tue -- 02:00 AM AST     1.42 feet High Tide
Tue -- 05:49 AM AST     Sunrise
Tue -- 08:45 AM AST     0.37 feet Low Tide
Tue -- 11:38 AM AST     Moonrise
Tue -- 01:38 PM AST     0.74 feet High Tide
Tue -- 06:48 PM AST     Sunset
Tue -- 07:32 PM AST     0.08 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Playa de Fajardo, Puerto Rico, Tide feet

Vieques Passage
Click for Map
Tue -- 12:04 AM AST     0.00 knots Slack
Tue -- 12:15 AM AST     Moonset
Tue -- 03:22 AM AST     0.54 knots Max Flood
Tue -- 05:49 AM AST     Sunrise
Tue -- 06:21 AM AST     -0.00 knots Slack
Tue -- 10:01 AM AST     -0.78 knots Max Ebb
Tue -- 11:38 AM AST     Moonrise
Tue -- 01:44 PM AST     0.00 knots Slack
Tue -- 04:40 PM AST     0.51 knots Max Flood
Tue -- 06:48 PM AST     Sunset
Tue -- 07:56 PM AST     -0.00 knots Slack
Tue -- 10:33 PM AST     -0.34 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION

Vieques Passage, Puerto Rico Current, knots

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