Monday, September28, 2020
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Marine Weather and Tides
Sabana Eneas, PR

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:17AMSunset 6:20PM Monday September 28, 2020 12:43 AM AST (04:43 UTC) Moonrise 4:42PMMoonset 3:34AM Illumination 83% Phase: Waxing Gibbous; Moon at 11 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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AMZ745 Coastal Waters Of Southwestern Puerto Rico Out 10 Nm- 837 Pm Ast Sun Sep 27 2020
Rest of tonight..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated showers.
Monday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Monday night..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Tuesday..East winds 15 to 20 knots veering southeast in the afternoon. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Tuesday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Wednesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Thursday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Scattered showers. Isolated Thunderstorms.
Friday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
AMZ700 837 Pm Ast Sun Sep 27 2020
Synopsis for puerto rico and the uS. Virgin islands waters... As a high pressure moves into the north-central atlantic early in the week, moderate to locally fresh east-southeast trades will prevail through much of the workweek. A tropical wave forecast to cross the eastern caribbean later tonight through Monday will increase the chance for shower and isolated Thunderstorm development across the regional waters.


7 Day Forecast for Marine Location Near Sabana Eneas, PR
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location: 18.08, -67.1     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 280002 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 802 PM AST Sun Sep 27 2020

UPDATE. Weather grids were updated to match current shower and thunderstorm activity, as well as recent model guidance. The combination of an upper-level trough to the north and the passage of a weak tropical wave will enhance shower and thunderstorm development across the forecast area. During the night and early morning hours, this activity will favor the local waters into portions of eastern Puerto Rico, including Vieques and Culebra, and the US Virgin Islands. As the day progresses on Monday, sufficient moisture along with diurnal heating, local effects and favorable conditions aloft will aid in the development of showers and thunderstorms over land. Under a generally east to east- southeast wind flow, afternoon convection will cluster along the interior and western portions of Puerto Rico. Streamer-like showers are possible downwind from Sierra de Luquillo and the local islands into eastern Puerto Rico and the San Juan metropolitan area. Since soils are somewhat saturated, there is a threat for urban and small stream flooding with the strongest activity. For the US Virgin Islands, limited shower activity is expected in the afternoon. Overnight lows are forecast to drop into the mid 70s to lower 80s, while daytime highs are expected to peak into the upper 80s to lower 90s across lower elevations. Winds will be light and variable, increasing during the day and gusty near the shower and thunderstorm activity.

AVIATION. TSRA/SHRA activity is expected during the next 24 hours. First, expected to affect TJSJ, USVI terminals, and Leeward terminals through 28/12Z. Then, afternoon convection will bring TSRA/SHRA to TJSJ and TJBQ between 28/16-22Z. VCSH expected elsewhere through at least 28/22Z. Winds will be variable at 5-15 knots through 28/14Z, increasing to 10-20 knots and turning from the east thereafter.

MARINE. Small craft operators are urged to exercise caution across the Anegada Passage, offshore Caribbean and Atlantic waters, as well as coastal waters of eastern Puerto Rico and the US Virgin Islands due to winds up to 20 knots tonight. Elsewhere, tranquil marine conditions with seas up to 5 feet and winds up to 15 knots are expected. Choppy marine conditions due to higher winds will extend across the regional waters through at least midweek. A moderate risk of rip currents is expected for the beaches along the northwest to northeastern coast of Puerto Rico, some of the beaches in Culebra and Vieques, and eastern-most beaches of Saint Croix.

PREV DISCUSSION. /issued 230 PM AST Sun Sep 27 2020/

SYNOPSIS . A tropical wave moving across the Lesser Antilles will bring additional moisture over the area later today through Monday. Currently, low-level moisture is running above normal and this will continue through late Monday night. A mid to upper-level trough (TUTT) extends northeast of the northern Leeward islands southwestward into the eastern Caribbean. The tropical wave and TUTT will enhance afternoon convection through Monday. By mid-week another tropical wave is expected to transverse the region, followed by a drier air mass by the end of the week.

SHORT TERM . Rest of Today through Tuesday .

Light showers drifted across portions of Puerto Rico and adjacent islands through most of the morning hours. This activity is being produced by an upper-level trough and a TUTT low to the northeast of Puerto Rico. The upper-level low is expected to slowly sink to the southwest over the next several hours. Also, a week tropical wave is currently passing through the Lesser Antilles and will invade the local waters later today. The features above will impact our weather through Monday. The wave will increase low- level moisture and instability, while the TUTT and upper-level trough will provide upper-level instability. The above will result in an increase in showers and thunderstorms during the afternoons.

Today, showers and isolated thunderstorms are expected to develop across eastern, interior, western and southwestern areas of Puerto Rico today. This activity could cause urban and small stream flooding and ponding of water on roadways. Tonight, isolated to scattered showers are possible due to the wave moving through the area.

Monday, PWAT will remain higher than normal due to the departing tropical wave moisture lingering over the region. The combination of local and diurnal heating coupled with the departing wave moisture will cause showers and thunderstorms across Puerto Rico.

Tuesday, the above normal moisture moves west of Puerto Rico as a drier air mass filters into the area from the east. Therefore, expect showers and thunderstorm activity to decrease, however, showers and thunderstorms are expected to develop as a result of diurnal heating and sea breeze convergence.

PREV DISCUSSION . /issued 435 AM AST Sun Sep 27 2020/ LONG TERM . Wednesday through Monday .

A tropical wave is expected to move over the islands on Wednesday, increasing moisture content once again with precipitable water values around 1.9 to 2.2 inches. Additionally, a mid-level trough in the area will cause instability to increase, with cold temperatures and divergence aloft. As a result, showers and thunderstorms are expected over the islands. Urban and small stream flooding will be possible. For the rest of the workweek, some Saharan dust will filter from the east, resulting in hazy skies. However, fragmented groups of clouds embedded in the trade winds will also move over the area. Therefore, the available moisture in combination with local effects will result in afternoon activity, especially over the interior and western Puerto Rico. For the weekend, a mid to upper level high pressure will begin to build north of the western Atlantic, decreasing instability levels aloft. At the lower levels,a drier air mass is expected to move in, with some Saharan dust lingering and precipitable water values falling to near 1.6 inches. Hence, a decrease in rainfall activity can be expected through Monday.

AVIATION . VFR but SCT-BKN lyrs nr FL025 . FL050 with SHRA/Isold TSRA in and around the local islands til 27/23Z, and en route btw PR and the northern Leeward Islands as a tropical wave crosses the Lesser Antilles and enters the eastern Caribbean overnight. VCSH at all terminals today with VCTS mainly at TNCM/TKPK/TJSJ/TJMZ/TJPS til 27/23Z. Sfc wnd mainly fm NE with sea breeze variations bcmg light and variable aft 27/23Z.

MARINE . The northerly swell has finally dissipated across the local and outer waters. Seas up to 5 feet with, and winds from the east to northeast up to 15 kts. A tropical wave will transverse the local waters today through early Monday, and cause choppy seas over the local waters. Also, showers and thunderstorms are expected to develop over the local waters over the next several days.

PRELIMINARY POINT TEMPS/POPS. SJU 80 90 79 90 / 60 60 50 50 STT 80 90 80 89 / 50 40 40 40

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

SHORT TERM . ICP LONG TERM . DS PUBLIC DESK . CVB


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGIP4 - 9759110 - Magueyes Islands, PR 8 mi55 min ESE 1.9 G 5.1 82°F 87°F1012.6 hPa
MGZP4 - 9759394 - Mayaguez, PR 10 mi61 min 77°F 87°F1013 hPa
PTRP4 21 mi28 min E 1.9 G 1.9 78°F
41115 - Rincon, Puerto Rico (181) 23 mi47 min 86°F2 ft
42085 - Southeast of Ponce, PR 33 mi43 min E 14 G 16 85°F 87°F2 ft1011.2 hPa (+0.0)
JOXP4 - Jobos Bay Reserve, Puerto Rico 47 mi58 min NNE 1.9 78°F 1014 hPa76°F

Wind History for Magueyes Island, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for TJMZ

Wind History from JMZ (wind in knots)
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Last 24hr----------------------------------------E6E5E8E9
1 day ago------------------------------------------------
2 days ago------------------------------------------------

Tide / Current Tables for Puerto Real, Puerto Rico
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Puerto Real
Click for Map
Mon -- 12:29 AM AST     0.48 feet Low Tide
Mon -- 03:33 AM AST     Moonset
Mon -- 05:37 AM AST     0.91 feet High Tide
Mon -- 06:18 AM AST     Sunrise
Mon -- 11:53 AM AST     0.23 feet Low Tide
Mon -- 04:42 PM AST     Moonrise
Mon -- 06:19 PM AST     Sunset
Mon -- 06:39 PM AST     1.25 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.50.60.70.80.90.90.80.70.50.40.30.20.30.40.70.91.11.21.21.210.80.6

Tide / Current Tables for Magueyes Island, Caribbean Sea, Puerto Rico
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Magueyes Island
Click for Map
Mon -- 03:33 AM AST     Moonset
Mon -- 06:18 AM AST     Sunrise
Mon -- 10:51 AM AST     0.36 feet Low Tide
Mon -- 04:41 PM AST     Moonrise
Mon -- 06:18 PM AST     Sunset
Mon -- 08:15 PM AST     0.86 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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wmap_A
GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station Puerto Rico,Virgin Islands
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