Marine Weather and Tides
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
|Sunrise 6:32AM||Sunset 6:38PM||Saturday March 17, 2018 2:18 AM AST (06:18 UTC)||Moonrise 6:43AM||Moonset 6:55PM||Illumination 0%|
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|AMZ735 Coastal Waters Of Southern Puerto Rico Out 10 Nm- 902 Pm Ast Fri Mar 16 2018 |
Rest of tonight..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds.
Saturday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers through the day.
Saturday night..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers through the night.
Sunday..Southeast winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Sunday night..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Monday..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
Tuesday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated showers.
Wednesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
|AMZ700 902 Pm Ast Fri Mar 16 2018 |
Synopsis for puerto rico and the uS. Virgin islands waters... Pulses of fading northerly swell will continue to move across the atlantic waters and Mona passage through the weekend. The surface high pressure northeast of the region will continue to produce a gentle to moderate southeasterly wind flow through at least Saturday, becoming more easterly by Sunday. A frontal boundary will stall to the north of the islands, then a high pressure across the western atlantic will cause the shear line to decay throughout the weekend.
7 Day Forecast for Marine Location Near Santo Domingo, PRHourly EDIT Help
Area Discussion for - San Juan, PR  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxca62 tjsj 170147|
area forecast discussion
national weather service san juan pr
947 pm ast Fri mar 16 2018
Update Fair skies prevailed across puerto rico and the u.S.
Virgin islands tonight. Dry air mass continues to hold across the
region. An increase in low level moisture is expected tomorrow.
As a result, better chances for showers are expected. No changes
needed to forecast grids tonight.
Aviation Vfr condtions are expected to prevail across all taf
sites through at least 16 12z. Low level winds will be light and
variable overnight, becoming east southeast Friday morning at 10
to 15 kts.
Marine No changes from previous discussion.
Prev discussion issued 356 pm ast Fri mar 16 2018
a dry airmass filter from the east over the islands, limiting
shower activity across the region. A surface front stalled to the
north and a high pressure northeast of the region induced a
southerly wind flow resulting in warm temperatures today. Localized
afternoon showers across NW pr will remain possible through sunset.
The available surface moisture is expected to increase throughout
Short term... Tonight through Sunday...
although a dry and stable atmosphere is in place, shower
development remain possible across the northwest quadrant of
puerto rico later this afternoon. No shower activity is expected
overnight across most of the region. But a pocket of moisture
embedded in the southeasterly trades will moves closer to the
islands early Saturday morning. Therefore a few passing showers
are possible overnight across the surrounding waters of eastern
puerto rico and the u.S. Virgin islands.
Tropical moisture is forecast to increase and the winds will
continue from the southeast early Saturday morning becoming more
from the east-southeast by Sunday. Then, model guidance indicated
the presence of a subtropical jet segment which is going to
increase ventilation aloft through the weekend. Under a light wind
flow, sea breezes and diurnal heating would be the driving
factors enhanced by the upper level dynamic. Scattered to locally
numerous afternoon showers are expected across the cordillera|
central, north and west puerto rico as well as downwind from the
u.S. Virgin islands Saturday afternoon. Also, weather conditions
are favorable for the development of EL yunque streamer which
could aid in shower activity near the san juan metro area. Saturday
seems to be the best day for rainfall activity. Thunderstorms were
included, because upper level instability could trigger one or
two of them.
Long term... Monday through Saturday... From previous discussion...
high pressure will begin to build over the northeast atlantic and
spread over the caribbean as it shifts a little southwest during
the week next week. After a weak low pressure shifts offshore from
the united states into the western atlantic Sunday, another more
vigorous low will slip offshore on Tuesday and move along the
coast away from the area. This will keep surface flow somewhat
moist and east to southeast. A cold front shearline will approach
the area but should not affect the local islands until Saturday if
the models are handling the trough well, but bubbles of moisture
begin to form ahead of the shearline in weakening surface flow
that will increase shower activity next weekend.
Aviation...VFR conds are expected to prevail at all TAF sites
through the forecast cycle. Shra possible in and around jbq through
16 22z. Ese winds 10 to 12 knots becoming light and variable
seas will continue to improve the throughout the weekend. Mariners
can expect seas between 4 and 6 feet across the atlantic waters
and mona passage, and between 3 and 5 feet elsewhere. Model
guidance suggested marine conditions below small craft criteria
through the weekend into the upcoming week.
Preliminary point temps pops
Sju 75 87 74 86 40 40 50 50
stt 72 85 75 83 40 50 50 50
Sju watches warnings advisories
Pr... High rip current risk until 6 am ast Saturday for culebra-north
central-northeast-northwest-san juan and vicinity-southeast-
Short term... Fc
long term... .Cam
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|MGIP4 - 9759110 - Magueyes Islands, PR||18 mi||48 min||ENE 1 G 5.1||75°F||80°F||1016.5 hPa|
|42085 - Southeast of Ponce, PR||20 mi||78 min||NNE 7.8 G 9.7||79°F||80°F||1016 hPa (-0.6)|
|AROP4 - 9757809 - Arecibo, PR||26 mi||48 min||S 2.9 G 4.1|
|JOXP4 - Jobos Bay Reserve, Puerto Rico||30 mi||93 min||NNW 1||74°F||1017 hPa||70°F|
|PTRP4||32 mi||28 min||ESE 4.1 G 5.1||74°F|
|41115 - Rincon, Puerto Rico (181)||34 mi||48 min||80°F||4 ft|
|SJNP4 - 9755371 - San Juan, PR||42 mi||54 min||77°F||80°F||1017 hPa|
|41053 - San Juan, PR||43 mi||48 min||S 3.9 G 5.8||77°F||1016.1 hPa|
|YABP4 - 9754228 - Yabucoa Harbor, PR||49 mi||48 min||80°F|
Wind History for Penuelas (Punta Guayanilla), PR(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
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EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Punta Guayanilla |
Click for Map
Sat -- 12:29 AM AST 0.08 feet Low Tide
Sat -- 06:33 AM AST Sunrise
Sat -- 06:43 AM AST Moonrise
Sat -- 09:14 AM AST New Moon
Sat -- 09:19 AM AST 0.35 feet High Tide
Sat -- 05:52 PM AST 0.18 feet Low Tide
Sat -- 06:37 PM AST Sunset
Sat -- 06:55 PM AST Moonset
Sat -- 08:55 PM AST 0.22 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
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|Playa de Ponce |
Click for Map
Sat -- 01:20 AM AST 0.07 feet Low Tide
Sat -- 06:32 AM AST Sunrise
Sat -- 06:42 AM AST Moonrise
Sat -- 08:27 AM AST 0.41 feet High Tide
Sat -- 09:14 AM AST New Moon
Sat -- 03:38 PM AST 0.17 feet Low Tide
Sat -- 06:36 PM AST Sunset
Sat -- 06:54 PM AST Moonset
Sat -- 08:09 PM AST 0.26 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  HelpWeather Map
GOES Local Image of Puerto Rico 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
Wind Forecast for (2,6,7,8)(on/off)  Help
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