Wednesday, October28, 2020
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Marine Weather and Tides
Carolina, 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 6:20AMSunset 5:54PM Wednesday October 28, 2020 10:57 PM AST (02:57 UTC) Moonrise 4:26PMMoonset 3:55AM Illumination 93% Phase: Waxing Gibbous; Moon at 12 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- 912 Pm Ast Wed Oct 28 2020
.small craft should exercise caution...
Rest of tonight..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers and isolated Thunderstorms.
Thursday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Isolated Thunderstorms through the day. Scattered showers in the afternoon.
Thursday night..Southeast winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers and isolated Thunderstorms.
Friday..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers and isolated Thunderstorms.
Friday night..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers and isolated Thunderstorms.
Saturday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Isolated showers.
Sunday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
Monday..Southeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northeast swell around 4 feet. Isolated showers.
AMZ700 912 Pm Ast Wed Oct 28 2020
Synopsis for puerto rico and the uS. Virgin islands waters... Moderate to fresh trade winds, will promote choppy and hazardous through the end of the week. A tropical wave will move across the local area tonight through Thursday, bringing showers and Thunderstorms to the local waters.


7 Day Forecast for Marine Location Near Carolina, PR
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location: 18.46, -65.99     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 290140 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 940 PM AST Wed Oct 28 2020

UPDATE. A tropical wave is currently passing over the Leeward Islands, but the moisture associated with the wave is already approaching the local area. There is also a surface high pressure across the Atlantic, tightening the local pressure gradient and thus causing moderate to locally strong winds. This increase in moisture and winds, is causing widely scattered but brief showers across the local area this evening. As the moisture increases, the shower activity is expected to become more numerous. Adding to that, an upper trough across the local area will cause a gradual increase in instability as indicated by the forecast soundings. This increase in instability may lead to an increased chance of thunderstorms across the local islands from tonight through Friday. Showers and thunderstorms are forecast for most of Puerto Rico on Thursday, some of the showers could be heavy at times, and could lead to urban and small stream flooding in some areas.

AVIATION. SHRA/TSRA activity is expected to increase gradually overnight into Thursday across the local flying area. This means that at least VCSH is expected tonight, but VCTS is expected by Thursday morning. TEMPO MVFR conds are possible through the forecast period, especially across the USVI terminals and TJSJ. Winds will remain from the east at around 15KT with higher gusts, but variations will occur near the SHRA/TSRA.

MARINE. Small Craft Advisory continues in effect for many of the local waters, due to seas up to 8 feet, and winds up to 20 knots although locally higher at times. Showers and thunderstorms are forecast over the waters tonight and through Thursday. Moderate to high risk of rip currents are expected tonight through Friday for most of the local beaches.

PREV DISCUSSION. /issued 415 PM AST Wed Oct 28 2020/

SYNOPSIS . A tropical wave is forecast to move from late tonight through Thursday across the region. A moist east to southeasterly wind flow is expected to continue through Friday behind the wave passage. The flooding risk will increase across the U.S. Virgin Islands and across the eastern half and southern sections of Puerto Rico with the wave passage during this period. Breezy conditions are expected through at least Thursday and strong gusty winds are possible with the thunderstorms. Drier mid-level air is expected to filter over the area during the weekend into early next week.

SHORT TERM . Rest of today through Friday . Quick passing trade wind showers and breezy conditions prevailed across the islands today. The 12z SJU upper air sounding indicated a 18-23 kt east to northeast wind flow from the surface to around 500 mb. This flow has kept rainfall accumulations at less than 1 inch in general across the northern and eastern sections of Puerto Rico and even less across the U.S. Virgin Islands. Some of the highest amounts observed before 2 PM where from brief isolated thunderstorms developing over Arecibo and Utuado, and near St. Croix. Northeast moderate to fresh trades ahead of a tropical wave will continue to bring breezy conditions and scattered showers across the region through tonight. At upper levels, a low just north of the islands is expected to move into the Mona Passage by tonight, this upper level feature will enhance shower and thunderstorm development across the regional waters and over portions of the islands, just ahead of the wave passage.

The tropical wave is currently moving over the Lesser Antilles and it's wave axis is expected to move across the local area by early Thursday morning. This will cause winds to shift more from the east to southeast and a moist plume behind the wave is forecast to linger over the islands through at least Friday. This moist plume in a southeasterly steering wind flow should favor training of showers across portions of southern and eastern Puerto Rico, increasing the potential for urban and small stream flooding, minor river flooding and as well as localized flash flooding and mudslides in areas of steep terrain.

LONG TERM . Saturday through Thursday .

From PREV DISCUSSION . /issued 439 AM AST Wed Oct 28 2020/

A gradual drying trend is still forecast by Saturday and into the weekend as a surface high pressure ridge builds north of the region and the mid to upper level ridge remain in place across the area to maintain overall dry and stable conditions. This overall pattern will maintain moderate east southeast winds across the forecast areas at least through the early part of the week. As the winds become more east southeast, expect afternoon showers to develop and steer towards the northwestern sections of the islands. Overnight passing showers will remain possible over the coastal waters each day through the weekend, but so far these showers will be fast moving and should leave minimal accumulations. Low level moisture transport across the area is still forecast to gradually erode with model guidance suggesting decreasing precipitable water at least through Tuesday. By Wednesday and Thursday, another surge in trade wind moisture is so far forecast as the trade winds increase and become northeasterly. In addition, A weak easterly disturbance and wind surge is forecast to reach the area by then and therefore expect a better chance for overnight and early morning passing showers, followed by afternoon convection across the islands and coastal waters.

AVIATION . SHRA will continue to move across most of the terminals through the forecast period. Also, VCTS are expected to develop after 28/22z across the Leeward terminals and TJSJ/TIST/TISX. This could result in TEMPO group due to reduced VIS and lower ceilings, with temporarily MVFR/IFR conditions. Winds will shift from the ESE tonight, at 15 to 20 knots.

MARINE . Hazardous marine conditions will continue through the end of the week, mainly for the offshore Atlantic waters and the Anegada Passage due to wind driven seas up to 8 feet. Moderate to fresh trades are expected to prevail between 15-20 knots in general. Small Craft Advisories are in effect. Please refer to the latest Marine Weather Message (MWWSJU) for additional details. A tropical wave will increase the potential for showers and thunderstorms from tonight through Friday across the region.

For the beach goers, there is a High Rip Current Risk in effect for the northern coast of Puerto Rico, Culebra and St. Croix. Please refer to the latest Coastal Hazard Message (CFWSJU) for additional details.

PRELIMINARY POINT TEMPS/POPS. SJU 78 88 77 88 / 70 70 50 60 STT 77 87 79 88 / 70 70 60 60

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

VI . High Rip Current Risk through late Thursday night for St Croix.

AM . Small Craft Advisory until 8 AM AST Saturday for Anegada Passage Southward to 17N-Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N.

Small Craft Advisory until 6 AM AST Friday for Caribbean Waters of Puerto Rico from 10 NM to 17N-Coastal Waters of Northern USVI and Culebra out 10 NM-Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out 10 NM.



SHORT TERM . JA LONG TERM . TW PUBLIC DESK . CVB


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41053 - San Juan, PR 6 mi57 min ESE 12 G 16 80°F 84°F5 ft1012.3 hPa (+1.2)
SJNP4 - 9755371 - San Juan, PR 7 mi63 min SE 4.1 G 6 80°F 85°F1013.5 hPa
41056 31 mi57 min E 14 G 16 82°F 85°F4 ft1012 hPa (+0.9)
ESPP4 - 9752695 - Esperanza, PR 37 mi63 min NE 2.9 G 5.1 85°F1013.2 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 37 mi72 min NE 4.1 79°F 1014 hPa72°F
CLBP4 - 9752235 - Culebra, PR 38 mi63 min 80°F 85°F1013.1 hPa

Wind History for San Juan, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR2 mi61 minE 58.00 miLight Rain78°F73°F87%1013.4 hPa

Link to 5 minute data for TJSJ

Wind History from JSJ (wind in knots)
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Last 24hrE6E44E10E10E13E11SE4E10NE11E9E15
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1 day agoE10NE9E8NE5E7SE3CalmSE4CalmE9SE3SE4E10E13E14E15E16E14E13E10E10E7E7E10
2 days agoE6CalmE4E5SE3CalmSE3CalmCalmE8E16E12E17
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Tide / Current Tables for Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
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Boca De Cangrejos
Click for Map
Wed -- 01:13 AM AST     0.23 feet Low Tide
Wed -- 03:55 AM AST     Moonset
Wed -- 06:22 AM AST     Sunrise
Wed -- 07:27 AM AST     1.15 feet High Tide
Wed -- 01:38 PM AST     0.25 feet Low Tide
Wed -- 04:25 PM AST     Moonrise
Wed -- 05:52 PM AST     Sunset
Wed -- 07:39 PM AST     1.08 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.20.30.40.60.811.11.110.80.60.40.30.30.30.50.70.91.11.110.80.6

Tide / Current Tables for San Juan, Puerto Rico (3)
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San Juan
Click for Map
Wed -- 12:55 AM AST     0.59 feet Low Tide
Wed -- 03:55 AM AST     Moonset
Wed -- 06:22 AM AST     Sunrise
Wed -- 07:05 AM AST     1.60 feet High Tide
Wed -- 01:11 PM AST     0.64 feet Low Tide
Wed -- 04:26 PM AST     Moonrise
Wed -- 05:53 PM AST     Sunset
Wed -- 07:12 PM AST     1.58 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.60.70.81.11.31.51.61.51.41.20.90.70.60.70.81.11.31.51.61.51.41.10.9

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