Sunrise 5:56 AM   Sunset 6:43 PM Moonrise 9:21 PM   Moonset 7:37 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 403 Pm Ast Fri Apr 26 2024
Synopsis for puerto rico and the uS. Virgin islands waters - . A small northwesterly swell will continue to spread across the local waters tonight. Showers and Thunderstorms will continue to affect the local waters for the next several days as lingering moisture from a surface trough/old frontal boundary remains over the local area. Winds will prevail from the east and becoming northeast on Saturday under the influence of a surface high pressure moving off the eastern coast of the united states. A northerly swell is anticipated to spread across the local waters early next week deteriorating coastal and marine conditions.

FXCA62 TJSJ 262149 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 549 PM AST Fri Apr 26 2024


SYNOPSIS

Unstable weather conditions are expected to prevail through at least tomorrow with limited to elevated risks of flash flooding, urban and river flooding, and landslides mainly over the western interior and southwestern sectors of PR. A slight improvement on weather condtions is expected by Sunday into early next week. We encourage citizens to stay informed and monitor our forecast for additional updates. A northerly swell is anticipated to spread across the local waters early next week briefly deteriorating coastal and marine conditions.

SHORT TERM
Tonight through Sunday...

Partly cloudy to cloudy skies prevailed across Puerto Rico and the U.S. Virgin Islands today. During the morning hours, calm weather conditions dominated with mostly easterly winds between 5 to 10 mph. Low temperatures across the coastal areas ranged around the mid-70s and in mountains and valleys around the mid-60s. Daytime highs peaked mainly in the 80s to lower 90s along the coasts and 70s to 80s across the mountains.

During the early hours of the afternoon, as had been anticipated, showers and thunderstorms began to develop across the western interior and western Puerto Rico. At the moment, the activity has already been decreasing, but radar estimates recorded up to 2 inches of rain in municipalities such as Añasco, Jayuya, Las Marías, Utuado, Adjuntas, and Lares, flood warnings were issued in those regions.

The forecast for the overnight hours remains without much changes, it is expected that showers will then increase across the U.S.
Virgin Islands by late this afternoon into the evening and early tomorrow morning as a plume of moisture moves towards us, resulting in showery weather, with possible isolated thunderstorms moving inland from the surrounding waters. Rainfall models are showing that this activity should continue in sectors of eastern Puerto Rico and move towards the rest of the island for the rest of the day (Saturday). Winds shift to the northeast tomorrow as surface high pressure moves from the eastern seaboard into the western Atlantic. Therefore, the latest model guidance suggests that the highest accumulations should be in the SW quadrant of Puerto Rico. For that reason, the risk of flooding remains elevated tomorrow, we encourage residents and visitors to exercise caution on the roads and monitor any additional advisories if they are issued.

For Sunday, winds are expected to start becoming breezier. The latest precipitable water models continue to show above normal values for that period, but some models are showing a slight improvement in terms of less rain accumulations, but in any case, at this point some activity is expected for the morning hours to the northern and eastern Puerto Rico, then towards the interior and southwest quadrant.

LONG TERM
Monday through Friday...

PREV DISCUSSION
/issued 417 AM AST Fri Apr 26 2024/

A strong surface high pressure located over the eastern coast of the United States will promote a northeasterly wind flow from Monday through Wednesday. As this feature moves from the western to the central Atlantic winds are expected to veer from a more easterly component through the rest of the long-term period.
Previous model runs indicated a drying trend for the beginning of the workweek, however, the latest model guidance now suggests a prolongation of above-normal moisture across the islands. The precipitable water content values are between 1.60 to 1.80 until Wednesday, then increasing up to 2.20 inches through the rest of the period. A vast moisture field coming from South America to the eastern Caribbean will help to enhance the shower and thunderstorm activity across the islands. This wet and unstable weather pattern will promote rainfall activity everyday across the area, especially over portions along the Central Cordillera, eastern, and western portions of Puerto Rico. The U.S. Virgin Islands will also experience moderate to locally heavy showers by the end of the period. With the expected weather scenario limited to elevated risks of urban and river flooding, flash flooding, and landslides will continue to impact areas already saturated by the previous days/week rainfall activity. Daytime temperatures are expected to stay in the mid 80s along the coastal and urban areas of Puerto Rico and the U.S. Virgin Islands, and from the upper 70s to low 80s across the interior.

AVIATION...
(18Z TAFs)

Mainly VFR conds expected to prevail across all terminals. However, SHRA/TSRA will continue to develop over the western interior may lead to mtn tops obscd, VCTS are expected for JBQ/JPS thru 26/23z.
After 26/23z showers en route from the Leeward Islands/Atlc waters may cause brief -SHRA or MVFR conds at TISX/TIST/TJSJ (and possibly due to TSRA) thru the rest of the overnight hours; TSRA could develop btwn 2716-23z along the southern slopes. East winds up to 14 kt with sea breeze variations, bcmg ENE around 26/22z.

MARINE...

A small northwesterly swell will continue to spread across the local waters tonight. Showers and thunderstorms will continue to affect the local waters for the next several days as lingering moisture from a surface trough/old frontal boundary remains over the local area. Winds will prevail from the east and becoming northeast on Saturday under the influence of a surface high pressure moving off the eastern coast of the United States. A northerly swell is anticipated to spread across the local waters early next week deteriorating coastal and marine conditions.


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

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Roosevelt Roads
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Fri -- 05:53 AM AST     0.21 feet Low Tide
Fri -- 05:57 AM AST     Sunrise
Fri -- 07:36 AM AST     Moonset
Fri -- 09:53 AM AST     0.41 feet High Tide
Fri -- 04:13 PM AST     -0.11 feet Low Tide
Fri -- 06:42 PM AST     Sunset
Fri -- 09:20 PM AST     Moonrise
Fri -- 11:25 PM AST     1.01 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Roosevelt Roads, Puerto Rico, Tide feet

Vieques Passage
Click for Map
Fri -- 12:06 AM AST     0.73 knots Max Flood
Fri -- 03:21 AM AST     -0.00 knots Slack
Fri -- 05:58 AM AST     Sunrise
Fri -- 06:59 AM AST     -0.88 knots Max Ebb
Fri -- 07:36 AM AST     Moonset
Fri -- 10:57 AM AST     0.00 knots Slack
Fri -- 01:24 PM AST     0.38 knots Max Flood
Fri -- 04:09 PM AST     -0.00 knots Slack
Fri -- 06:40 PM AST     -0.32 knots Max Ebb
Fri -- 06:42 PM AST     Sunset
Fri -- 08:59 PM AST     0.00 knots Slack
Fri -- 09:20 PM AST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION

Vieques Passage, Puerto Rico Current, knots

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