Monday, September28, 2020
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Marine Weather and Tides
La Parguera, 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 6:16AMSunset 6:19PM Monday September 28, 2020 1:51 AM AST (05:51 UTC) Moonrise 4:41PMMoonset 3:34AM Illumination 84% 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- 128 Am Ast Mon Sep 28 2020
Today..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers in the morning.
Tonight..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Tuesday..Southeast winds 15 to 20 knots. 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 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Thursday..East winds 15 to 20 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated Thunderstorms. Scattered showers.
Friday..East winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated Thunderstorms, then isolated showers.
AMZ700 128 Am Ast Mon Sep 28 2020
Synopsis for puerto rico and the uS. Virgin islands waters... As a high pressure moves into the north-central atlantic, moderate to locally fresh east-southeast winds will prevail through much of the workweek. A tropical wave is moving through the local area, and will bring showers and Thunderstorms across the regional waters today.


7 Day Forecast for Marine Location Near La Parguera, PR
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location: 17.97, -67.05     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 280534 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 134 AM AST Mon Sep 28 2020

SYNOPSIS. The tropical is moving across the local area, bringing showers and thunderstorms to the general area. The tropical wave will keep above normal moisture, which will combine with a mid to upper-level trough (TUTT) that extends northeast of the northern Leeward islands southwestward into the eastern Caribbean. The tropical wave and TUTT combination will continue to enhance the chances of showers and thunderstorms today. On Wednesday, another tropical wave is expected to approach the region, causing another increase in shower and thunderstorm activity, followed by a slightly drier air mass by the end of the week, perhaps with some Saharan dust.

SHORT TERM. Monday through Wednesday .

A tropical wave in combination with a mid-to-upper level trough will cause unsettled weather conditions across the islands today. Data from 28/00Z sounding, as well as satellite-derived precipitable water indicate values near 2.1 inches over the area. Additionally, Doppler radar and surface observations indicated an area of showers and thunderstorms affecting the U.S. Virgin Islands and eastern Puerto Rico. In fact, the high resolution models show that this activity should continue through the morning hours, affecting the same general areas. Since some of these soils are already saturated, urban and small stream flooding will be possible. In the afternoon, additional showers will continue to be affecting eastern Puerto Rico and the U.S. Virgin Islands, but also, local effects and diurnal heating will support activity developing over the interior, western, and northern Puerto Rico, including the San Juan metro area. Some of these showers could bring heavy rain at times.

A somewhat drier air mass is expected to filter in later in the evening and early Tuesday. Additionally, as the mid-level trough departs from the area, conditions are not going to be as favorable for showers development. However, at the surface, groups of clouds will make their way into the islands, resulting in another round of showers early in the day for the eastern half of the forecast area, followed by afternoon convection in western Puerto Rico.

Late Tuesday into Wednesday, another round of active weather is anticipated. A favorable weather pattern for rain will be established over the area, with a mid-to upper level trough causing instability aloft, as well as cold temperatures in the mid-levels. Additionally, a tropical wave will advance into the islands, providing an increase in moisture. Therefore, widespread shower and thunderstorm activity is expected for the local waters and the islands. First, as is usual, the eastern half of PR/USVI should see the bulk of the activity, but as the day progresses, the potential will increase for the production of convection over the interior, western, and northern PR, and in forms of streamers from Vieques, Culebra, El Yunque and USVI.

LONG TERM. Thursday through Tuesday .

Somewhat drier air is expected to move in on Thursday into Friday, perhaps with some Saharan dust, which could limit the shower and thunderstorm activity across the area, especially when compared to what is forecast on Wednesday. That said, there is a tilted upper level trough that could help in the development of isolated thunderstorms. This upper trough is forecast by the global models to remain near the local islands through the long term period, though it could put PR and the USVI in the subsident side late in the weekend. There is also a strong SFC high pressure in the central Atlantic that will dominate the local wind flow, keeping us observing east to east southeast winds. The available moisture is expected to be near to slightly above normal for most of the long term period. So given the current setup, we can expect morning and overnight isolated to scattered showers with isolated thunderstorms over the waters, near the USVI and eastern PR, while each afternoon, showers and thunderstorms can be expected across portions of central and western PR and areas of sea breeze convergence.

AVIATION. A tropical wave will continue to cause TSRA across TISX/TIST at least through 28/10Z, with some reduction in VIS and lower ceilings expected. VCTS will also be affecting TJSJ and the Leeward terminals through the day, and TJBQ after 28/17Z. Winds will be out of the ESE at 10-15 knots with stronger gusts, especially near thunderstorms.

MARINE. Seas up to 5 feet and winds up to 20 knots are expected today across most of the local waters. Showers and thunderstorms causing locally higher seas and gusty winds are possible over the waters as a tropical wave passes through. Seas will increase up to 6 feet on Tuesday. Small craft operators are urged to exercise caution. There is a moderate risk of rip currents across the north beaches of PR and Culebra as well as eastern St Croix, low risk elsewhere.

PRELIMINARY POINT TEMPS/POPS. SJU 90 79 90 79 / 60 50 50 40 STT 88 79 89 79 / 40 40 40 60

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

SHORT TERM . ERG LONG TERM . JA PUBLIC DESK . 99


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGIP4 - 9759110 - Magueyes Islands, PR 0 mi52 min E 2.9 G 6 81°F 87°F1011.4 hPa (-0.6)
MGZP4 - 9759394 - Mayaguez, PR 18 mi52 min 77°F 87°F1012.4 hPa (-0.5)
42085 - Southeast of Ponce, PR 28 mi52 min E 14 G 18 85°F 87°F3 ft1010.6 hPa (-0.8)
PTRP4 29 mi22 min E 1.9 G 2.9 78°F
41115 - Rincon, Puerto Rico (181) 31 mi56 min 86°F2 ft
JOXP4 - Jobos Bay Reserve, Puerto Rico 44 mi67 min N 1.9 78°F 1013 hPa75°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 Magueyes Island, Caribbean Sea, Puerto Rico (2)
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Magueyes Island
Click for Map
Mon -- 03:33 AM AST     Moonset
Mon -- 06:18 AM AST     Sunrise
Mon -- 06:19 AM AST     0.77 feet High Tide
Mon -- 09:57 AM AST     0.19 feet Low Tide
Mon -- 04:41 PM AST     Moonrise
Mon -- 06:18 PM AST     Sunset
Mon -- 08:55 PM AST     0.81 feet High Tide
Mon -- 10:43 PM AST     0.61 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.70.70.70.70.80.80.70.50.30.20.20.20.30.40.50.60.60.70.80.80.80.70.6

Tide / Current Tables for Guanica, Puerto Rico
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Guánica
Click for Map
Mon -- 03:33 AM AST     Moonset
Mon -- 04:59 AM AST     0.77 feet High Tide
Mon -- 06:17 AM AST     Sunrise
Mon -- 10:07 AM AST     0.19 feet Low Tide
Mon -- 04:40 PM AST     Moonrise
Mon -- 06:18 PM AST     Sunset
Mon -- 07:35 PM AST     0.81 feet High Tide
Mon -- 10:53 PM AST     0.61 feet Low 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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