Wednesday, December11, 2019
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Marine Weather and Tides
Daguao, PR

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:43AMSunset 5:48PM Wednesday December 11, 2019 3:53 AM AST (07:53 UTC) Moonrise 5:32PMMoonset 6:01AM Illumination 100% Phase: Full Moon; Moon at 14 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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AMZ725 Coastal Waters Of Southern Usvi Vieques And Eastern Puerto Rico Out 10 Nm- 934 Pm Ast Tue Dec 10 2019
.small craft advisory in effect through late Friday night...
Rest of tonight..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 7 seconds. Northeast swell around 4 feet. Scattered showers through the night. Isolated Thunderstorms after midnight.
Wednesday..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 8 seconds. Northeast swell around 4 feet. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Wednesday night..East winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 8 seconds. East swell around 4 feet. Scattered showers.
Thursday..East winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 10 seconds. East swell around 4 feet. Showers.
Thursday night..East winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 10 seconds. East swell around 4 feet. Numerous showers and isolated Thunderstorms.
Friday..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. East swell around 4 feet. Scattered showers.
Saturday..East winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. East swell around 4 feet. Scattered showers.
Sunday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. East swell around 4 feet. Scattered showers.
AMZ700 934 Pm Ast Tue Dec 10 2019
Synopsis for puerto rico and the uS. Virgin islands waters... Moderate to fresh easterly winds continue across the local waters, with the stronger than normal trade winds induced by a strong high pressure ridge anchored over the north central atlantic. These winds will create choppy and hazardous seas which will persist through the remainder of the week. Isolated to scattered trade wind showers can also be expected across much of the regional waters for the next several days.


7 Day Forecast for Marine Location Near Daguao, PR
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location: 18.19, -65.62     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 110116 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 916 PM AST Tue Dec 10 2019

UPDATE.

Doppler radar shows showers rapidly moving over northern and interior areas of Puerto Rico. This activity is forecast to persist across the region through the overnight and early morning hours. These showers are causing brief moderate to heavy rainfall as well as gusty winds up to 20 mph. As a result of their rapid speed,light rainfall accumulations have occured. However, this activity could cause minor flooding as well as ponding of water on roadways.

Tonight overnight low temperatures will be near the lower to middle 70s in lower elevations and the middle to upper 60s in higher elevations. Winds will be out of the east to northeast at 15 to 20 mph with higher gust possible.

Tomorrow afternoon an increase in showers are forecast as another patch of moisture moves across the region. Also, an upper-level trough to the northeast of the area will provide modest instability during the afternoon; the combination of the upper- level trough, local effects, and diurnal heating could lead to the development of isolated thunderstorms during the afternoon. Analysis of the 12Z and 18Z 500 mb heights of the GFS and ECMWF shows temperatures ranging from -8 to -10 degrees Celsius. The numbers, as mentioned earlier, are adequate to aid in the development of isolated thunderstorms tomorrow. Therefore isolated thunderstorms were put into the forecast today.

Wednesday's daytime high temperatures are forecast to be near the lower to middle 80s in lower elevations, and the middle to upper 70s in higher elevations. Winds will be out of the east to southeast at 15 to 20 mph.

AVIATION.

VCSH are possible across PR and USVI terminal sites through 11/22Z. SHRA/VCTS are expected to develop across terminals TJSJ, TIST AND TISX by 11/06Z with the activity diminishing by 11/12Z. The terminals above could experience brief MVFR conds due to SHRA/VCTS. SHRA/VCTS is expected to develop again across PR northern terminals and USVI by 11/18Z this activity will last through 12/03Z. Sfc winds out of the ENE at 15 to 20 kts with higher gusts possible. Max winds WNW 30 to 40 kts between FL237-287; winds turn W to NW 30 to 50 kts between FL302-406.

MARINE.

A small craft advisory is in effect for all the local and outer waters except for the southern nearshore waters of Puerto Rico. Seas will range from 7 to 9 feet with seas occasionally reaching 10 feet. Seas are forecast to remain choppy through the end of the workweek. There is a high risk of rip currents for the northern beaches of Puerto Rico and the eastern beaches of Culebra. In addition, there is a high risk of rip currents for the northeastern beach of the U.S. Virgin Islands, and the northwestern beach of Saint Thomas.

PREV DISCUSSION. /issued 141 PM AST Tue Dec 10 2019/

SYNOPSIS . A strong surface high pressure across the Atlantic will continue to produce brisk easterly trade winds as well as periods of passing showers during the next several days. More frequent showers are possible on Thursday and Friday as deeper moisture is expected and a mid-level trough amplifies just east of the area.

SHORT TERM . Rest of today through Thursday .

The overall weather pattern is expected to be a dominated by a strong surface high pressure over the Atlantic, which will continue to produce brisk easterly trade winds across the area. This will drive patches of low-level moisture into the region, resulting in passing showers moving across the area from time to time. More frequent showers are possible on Thursday as deeper moisture moves over the area and a mid-level trough amplifies just east of the area, inducing a low-level trough. This low-level trough is expected to move over the area and enhance somewhat the shower activity. The showers that affect the area throughout the period are not expected to result in flooding as the activity will be fast-moving and scattered in nature. Ponding of water on roadways and in low-lying areas is expected to be the main hazard.

LONG TERM . Friday through Wednesday (From Previous Discussion) .

Coming off what appears will be a wet Thursday, Friday will still provide scattered showers across the region. These showers will not be due to any organized weather system, but rather just a decent batch of moisture being advected in by the trade winds. The wettest period for Friday appears to be in the early morning hours, and trending drier for the rest of the day. The usual afternoon shower activity is likely in western Puerto Rico, though atmospheric conditions do not look favorable for thunderstorms at this point. A high chance for showers also exists for the east coast of Puerto Rico. Low level wind flow is still forecast to be fairly strong, so these showers will likely be moving fairly fast.

Conditions do not change much heading into the weekend. Though the chance for showers remains, slightly less moisture is forecast to move in, so a drier few days are expected. In fact, this drier trend continues into the next workweek. Forecast models still hint at the chance for some Saharan dust to move in by the middle of next week, though dust concentrations look unimpressive at this point.

AVIATION . VFR conds are expected through the forecast period. However, passing SHRA may produce brief MVFR conds at TIST, TISX and TJSJ at times, but VFR conds should prevail most of the time. Some mountain obscuration are also possible in the interior portions of Puerto Rico and near El Yunque. ENE winds of 15-25 kts below FL100. Wind gusts of 30 kts are possible with SHRA as they pass by.

MARINE . Moderate to fresh easterly trade winds between 15 and 20 kts will continue to result hazardous seas across the regional waters with wave heights between 7 and 8 feet expected through at least the end of the work week. Therefore, small craft advisories are in effect. For beachgoers, there is a high risk of rip currents across the north-facing beaches of the islands.

PRELIMINARY POINT TEMPS/POPS. SJU 76 84 74 83 / 70 50 80 80 STT 75 85 75 85 / 40 40 60 60

SJU WATCHES/WARNINGS/ADVISORIES. PR . High Rip Current Risk through late Friday night for Culebra- North Central-Northeast-Northwest-San Juan and Vicinity- Southeast.

VI . High Rip Current Risk through late Friday night for St Croix- St Thomas. St John. and Adjacent Islands.

AM . Small Craft Advisory until 2 AM AST Saturday for Anegada Passage Southward to 17N-Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-Caribbean Waters of Puerto Rico from 10 NM to 17N-Coastal Waters OF Northwestern Puerto Rico out 10 NM-Coastal Waters of Northern Puerto Rico out 10 NM-Coastal Waters of Northern USVI and Culebra out 10 NM-Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out 10 NM-Mona Passage Southward to 17N.



SHORT TERM . TW LONG TERM . RAM PUBLIC DESK . FRG


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41056 10 mi114 min E 14 G 16 81°F 83°F5 ft1015.3 hPa (-1.2)
ESPP4 - 9752695 - Esperanza, PR 10 mi60 min E 7 G 9.9 81°F 81°F1016.1 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 15 mi60 min 79°F 72°F
CLBP4 - 9752235 - Culebra, PR 19 mi60 min 79°F 83°F1016 hPa
41053 - San Juan, PR 32 mi114 min E 18 G 21 82°F 83°F6 ft1015.6 hPa (-1.2)
SJNP4 - 9755371 - San Juan, PR 32 mi60 min ESE 6 G 9.9 78°F 83°F1016.3 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 36 mi69 min NNE 5.1 76°F 1017 hPa69°F
CHAV3 - 9751639 - Charlotte Amalie, VI 38 mi60 min 79°F 1015.8 hPa
41052 - South of St. John, Virgin Islands 46 mi114 min ENE 16 G 18 81°F 83°F5 ft1015.1 hPa (-1.5)
LAMV3 48 mi60 min 80°F 82°F

Wind History for Esperanza, Vieques Island, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR26 mi2 hrsN 010.00 miPartly Cloudy77°F73°F88%1016.7 hPa

Link to 5 minute data for TJSJ

Wind History from JSJ (wind in knots)
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1 day agoS3CalmCalmCalmE19E12E18E12E11
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2 days agoCalmCalmCalmCalmCalmCalmE5E8NE8E6
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Tide / Current Tables for Roosevelt Roads, Puerto Rico
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Roosevelt Roads
Click for Map
Wed -- 01:43 AM AST     -0.07 feet Low Tide
Wed -- 06:01 AM AST     Moonset
Wed -- 06:43 AM AST     Sunrise
Wed -- 08:46 AM AST     1.10 feet High Tide
Wed -- 03:40 PM AST     0.32 feet Low Tide
Wed -- 05:31 PM AST     Moonrise
Wed -- 05:47 PM AST     Sunset
Wed -- 07:48 PM AST     0.57 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0-0-0.100.20.40.70.91.11.110.90.70.60.40.30.30.40.50.50.60.50.40.3

Tide / Current Tables for Vieques Passage, Puerto Rico Current (2)
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Vieques Passage
Click for Map
Wed -- 01:08 AM AST     -0.00 knots Slack
Wed -- 03:49 AM AST     -0.38 knots Max Ebb
Wed -- 06:01 AM AST     Moonset
Wed -- 06:16 AM AST     0.00 knots Slack
Wed -- 06:43 AM AST     Sunrise
Wed -- 09:59 AM AST     0.80 knots Max Flood
Wed -- 01:16 PM AST     -0.00 knots Slack
Wed -- 04:52 PM AST     -0.93 knots Max Ebb
Wed -- 05:31 PM AST     Moonrise
Wed -- 05:47 PM AST     Sunset
Wed -- 08:48 PM AST     0.00 knots Slack
Wed -- 11:15 PM AST     0.41 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20-0.2-0.3-0.4-0.3-0.10.20.50.70.80.70.50.1-0.3-0.6-0.9-0.9-0.8-0.6-0.30.10.30.4

Weather Map
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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.
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Wind Forecast for (2,6,7,8)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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