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 5:58AM||Sunset 6:44PM||Wednesday April 25, 2018 2:26 AM AST (06:26 UTC)||Moonrise 2:58PM||Moonset 3:00AM||Illumination 75%|
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|AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 951 Pm Ast Tue Apr 24 2018 |
Rest of tonight..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 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 through the day.
Wednesday night..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 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Thursday night..East winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated 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 showers.
Saturday..East 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.
Sunday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
|AMZ700 951 Pm Ast Tue Apr 24 2018 |
Synopsis for puerto rico and the uS. Virgin islands waters... East to northeast moderate to locally fresh winds will continue through mid-week. Then winds are forecast to veer from the east to southeast, as a front and associated low pressure moves across the northwestern atlantic.
7 Day Forecast for Marine Location Near Carolina, PRHourly EDIT Help
Area Discussion for - San Juan, PR  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxca62 tjsj 250201 cca|
area forecast discussion... Corrected
national weather service san juan pr
1001 pm ast Tue apr 24 2018
Update Only the lightest showers are seen on the local radars.
The 25 00z sounding showed 1.47 inches of precipitable water
which is down almost one half inch from yesterday at this time.
The dry slot that has caused all the precipitation to dissipate is
now working its way through the forecast area. Saint martin
(tncm) is also seeing the back edge of that dry slot with showers
and ceilings below fl035. This area of cloudiness is expected to
dissipate before reaching saint croix 25 08z or puerto rico at
25 11z as indicated by the GFS however moisture at 850 mb does
come through the area and there may be enough moisture for
isolated showers as in the current forecast.
Aviation Lower CIGS are now encroaching on tncm tkpk with
shra, but so far CIGS are above fl030. Some brief MVFR is
possible thru 26 00z. Isold shra are psbl in ene flow onto pr and
arnd the usvi otherwiseVFR is indicated thru 25 16z. Btwn
25 16-18z areas of cigs AOB fl050 will dvlp over WRN and interior
pr with shra and mtn obscurations. Brief MVFR psbl in tjmz. Sfc
winds E 5-10 kt with land sea breezes bcmg 10 to 15 kt aft
25 14z. MAX winds W 60 kt at fl470.
Marine Showers will increase beginning Wednesday night, but
small craft advisories are not expected during the next 7 days.
Prev discussion issued 336 pm ast Tue apr 24 2018
although satellite imagery detected dry air filtering from the
east over the islands, the lingering moisture combined with
diurnal and local effect will result in shower activity to the
west of the cordillera central through the evening hours. A fair
weather pattern with an easterly wind flow and little or no shower
activity is expected overnight and early Wednesday morning.
Short term... Tonight through Thursday...
showers were detected across the western municipalities of puerto
rico, and the eastern section of puerto rico and the u.S. Virgin
islands have mostly clear skies with no shower activity. As the
short wave trough axis exit the region an upper level ridge will
build aloft. A dry air mass already filtered over the islands,
which will limit shower activity through late Wednesday night.
However, the lingering moisture will interact with diurnal and
local effect to produce a few showers across the northwest
quadrant of puerto rico.
A ridge aloft will continues in place through at least Friday,|
but a surge of moisture is expected to bring shallow passing
showers across the u.S. Virgin islands and southeast puerto rico
early Thursday morning into mid-day followed by afternoon
convection across the northern half of pr on Thursday.
Long term... Friday through Wednesday...
near normal moisture and upper ridge will cause a weather pattern
of some isolated to scattered brief showers across the local
waters, usvi and eastern pr during the overnight and early morning
hours. Afternoon shower and possible thunderstorm development will
be mainly due to local effects over pr. Therefore, the available
moisture will combine with the diurnal heating and sea breeze
convergence to cause some showers and possible thunderstorms. This
weather pattern can be expected through the weekend and into
early next week.
The very long range models started hinting at a significant
increase in moisture and in shower activity by next Wednesday as
a frontal boundary settles north of the local islands. This is way
too far into the forecast period and the confidence is very low.
We will continue to monitor but it would not be surprising if the
model guidance varies widely from today until that date arrives.
shra tsra over western pr should end by 22z, impacting
the flying area of tjmz tjps tjbq. However, mainlyVFR conditions
are expected to prevail across all the terminals through the
forecast period. Low level winds will continue from the ene at 10-20
kt... Turning ese after 25 08z.
mariners can expect tranquil marine conditions with seas between 2
and 4 feet across the coastal waters of the islands and up to 6
feet across the atlantic offshore waters through tonight. Winds
are forecast to continue from the east at 10 to 20 knots but are
expected to veer from the east-southeast after Wednesday.
Preliminary point temps pops
Sju 75 89 76 88 20 20 40 50
stt 75 86 77 86 20 40 40 40
Sju watches warnings advisories
Short term... Cam
long term... .Ws
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|
|SJNP4 - 9755371 - San Juan, PR||7 mi||45 min||78°F||80°F||1016.5 hPa|
|YABP4 - 9754228 - Yabucoa Harbor, PR||29 mi||39 min||77°F|
|41056||31 mi||57 min||E 12 G 14||79°F||1016.1 hPa|
|JOXP4 - Jobos Bay Reserve, Puerto Rico||37 mi||102 min||N 2.9||74°F||1017 hPa||67°F|
|CLBP4 - 9752235 - Culebra, PR||38 mi||45 min||77°F||81°F||1015.7 hPa|
|AROP4 - 9757809 - Arecibo, PR||38 mi||39 min||SE 5.1 G 5.1|
Wind History for San Juan, PR(wind in knots) EDIT (on/off)  Help
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EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Boca De Cangrejos |
Click for Map
Wed -- 02:59 AM AST Moonset
Wed -- 05:43 AM AST 1.26 feet High Tide
Wed -- 06:00 AM AST Sunrise
Wed -- 12:10 PM AST 0.28 feet Low Tide
Wed -- 02:57 PM AST Moonrise
Wed -- 06:05 PM AST 1.04 feet High Tide
Wed -- 06:43 PM AST Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|San Juan |
Click for Map
Wed -- 03:00 AM AST Moonset
Wed -- 05:16 AM AST 1.44 feet High Tide
Wed -- 06:00 AM AST Sunrise
Wed -- 11:43 AM AST 0.17 feet Low Tide
Wed -- 02:58 PM AST Moonrise
Wed -- 05:37 PM AST 1.15 feet High Tide
Wed -- 06:44 PM AST Sunset
Wed -- 11:43 PM AST 0.07 feet Low 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.
target = "new">Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for (2,6,7,8)(on/off)  Help
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