Saturday, October16, 2021
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Marine Weather and Tides
Naranjito, PR

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:17AMSunset 6:02PM Saturday October 16, 2021 5:41 AM AST (09:41 UTC) Moonrise 3:53PMMoonset 2:48AM Illumination 77% Phase: Waxing Gibbous; Moon at 10 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 431 Am Ast Sat Oct 16 2021
Today..Southwest winds 5 to 10 knots veering northeast in the afternoon. Seas 1 to 3 feet. Dominant period 11 seconds. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Tonight..South winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Scattered showers through the night. Isolated Thunderstorms after midnight.
Sunday..Southeast winds 5 to 10 knots backing northeast in the afternoon. Seas 2 feet or less. Dominant period 10 seconds. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Sunday night..Southeast winds 5 to 10 knots. Seas 2 feet or less. Dominant period 10 seconds. Isolated Thunderstorms through the night. Scattered showers after midnight.
Monday..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Scattered showers. Isolated Thunderstorms.
Tuesday..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 11 seconds. Scattered showers. Isolated Thunderstorms.
Wednesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers and isolated Thunderstorms.
AMZ700 431 Am Ast Sat Oct 16 2021
Synopsis for puerto rico and the uS. Virgin islands waters... Gentle winds, generally out of the west to southwest will prevail across the regional waters today, then winds will become variable as they begin to return to our typical easterly pattern on Monday. Unsettled weather conditions are expetted to continue, associated with surface low pressure northeast of the area. Showers and a few Thunderstorms are possible across the local waters for the next few days.


7 Day Forecast for Marine Location Near Naranjito, PR
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location: 18.31, -66.18     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 160851 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 451 AM AST Sat Oct 16 2021

SYNOPSIS. Surface low pressure will gradually move away to the northeast, bringing a return to our normal easterly trade winds late Sunday and into Monday. Abundant moisture will continue through mid week promoting relatively active weather days during the weekend and the first half of next week, then a gradual drying trend will ensue.

SHORT TERM. Today through Monday .

A mid to upper level trough remains in place over Cuba, while upper level high pressure is currently located over the Leeward Islands. This will continue to create a divergent pattern aloft, favoring thunderstorm formation over the islands. Additionally, a polar trough continues to dominate over the central Atlantic, inducing a surface low to the northeast of the region. This feature will maintain light winds through early in the workweek, while pulling moisture from the south across the eastern Caribbean. As the trough moves out to the northeast, winds will gradually shift to a more typical direction: out of the southeast by late Sunday and more from the east on Monday. The steering flow, however will remain very light. On Sunday, high pressure builds over the region at the mid and upper levels, however, moisture levels will continue to be higher than normal, with the GFS-forecast soundings showing precipitable water values above 2.0 inches.

For each day, advective showers will move across the southern and eastern portions of Puerto Rico and the U.S. Virgin Islands, mainly in the overnight and morning hours. Then, in the afternoon, due to local effects showers and thunderstorms are expected to develop for the interior, western and northern Puerto Rico, although due to the light wind flow, some of this activity could also spread across the southern slopes. Urban and small stream flooding, as well as water surges along rivers and mudslides in steep terrain are likely to continue.

LONG TERM. Tuesday through Sunday .

An upper level trough digs into the western tropical Atlantic Sunday, allowing a weak TUTT low to be established just east of the Leeward Islands by Tuesday, but high pressure at upper levels generally remains established over the Caribbean waters, bringing northerly flow to the local area. Mid levels, as well, show a center of high pressure never far from the local area and generally across much of the Caribbean. At lower levels areas of moisture move through as high pressure builds over the western Atlantic and high pressure remains in control of the eastern Atlantic waters. This allows easterly flow modulated by weak waves to be the predominate influence in the weather pattern. While 500 mb temperatures are cooler during the midweek, they warm after Thursday. This and the fact that precipitable water values drop considerably after Friday, as mid levels become quite dry, will mean that shower activity will decrease considerably over the next weekend.

AVIATION. Mainly VFR conditions are expected to prevail through the forecast period. VCTS are expected for TJSJ/TJBQ/TJPS after 17Z, which could result in TEMPO groups for TJSJ/TJBQ due to low ceilings and reduced visibilities. VCSH will be possible for the USVI terminals. Winds will remain light, out of the southwest at around 5 knots with sea breeze influences. Maximum winds SW 21-26 kts btwn FL430-500.

MARINE. Benign conditions will prevail through Wednesday, but easterly winds will begin to rise during the latter part of next week forcing seas as high as 6 feet by next weekend as a northeasterly swell is added to the mix. This will also bring a high risk of rip currents to the eastern end of Saint Croix.

PRELIMINARY POINT TEMPS/POPS. SJU 91 77 88 76 / 50 40 70 50 STT 87 77 88 78 / 40 40 40 50

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

SHORT TERM . ERG LONG TERM . WS PUBLIC DESK . ERG


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 11 mi53 min S 1.9G2.9 78°F 86°F1010.9 hPa
41053 - San Juan, PR 12 mi71 min SSW 5.8G5.8 80°F 1010.1 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 25 mi56 min 0 78°F 1012 hPa73°F
41121 30 mi45 min 85°F2 ft
AROP4 - 9757809 - Arecibo, PR 30 mi59 min S 6G7 84°F
42085 - Southeast of Ponce, PR 36 mi101 min N 5.8G7.8 82°F 2 ft1010.6 hPa (-1.3)
41056 38 mi71 min W 1.9G1.9 82°F 1008.7 hPa
ESPP4 - 9752695 - Esperanza, PR 40 mi53 min 0G0 78°F 85°F1010.5 hPa
CLBP4 - 9752235 - Culebra, PR 47 mi53 min 80°F 86°F1010.5 hPa

Wind History for San Juan, PR
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR13 mi46 minN 010.00 miFair79°F73°F82%1010.8 hPa

Link to 5 minute data for TJSJ

Wind History from JSJ (wind in knots)
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Last 24hrS30034N3N7N9NW6SW6W40000000000000
1 day agoS503S4S4S5W7NW10N7N6N5NE4E6NE3--0N300000S30
2 days ago00S4SE5SE85S7S8
G15
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--SW40W6SW4W6W4NW300SE30000

Tide / Current Tables for San Juan, Puerto Rico (3)
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San Juan
Click for Map
Sat -- 12:04 AM AST     0.72 feet Low Tide
Sat -- 02:48 AM AST     Moonset
Sat -- 05:32 AM AST     1.44 feet High Tide
Sat -- 06:18 AM AST     Sunrise
Sat -- 11:35 AM AST     0.46 feet Low Tide
Sat -- 03:52 PM AST     Moonrise
Sat -- 06:00 PM AST     Sunset
Sat -- 06:20 PM AST     1.89 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for San Juan, Puerto Rico (2) (expired 1998-12-31)
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San Juan
Click for Map
Sat -- 12:05 AM AST     0.72 feet Low Tide
Sat -- 02:48 AM AST     Moonset
Sat -- 05:30 AM AST     1.43 feet High Tide
Sat -- 06:18 AM AST     Sunrise
Sat -- 11:35 AM AST     0.44 feet Low Tide
Sat -- 03:52 PM AST     Moonrise
Sat -- 06:00 PM AST     Sunset
Sat -- 06:23 PM AST     1.90 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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