Marine Weather and Tides
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
|Sunrise 5:49AM||Sunset 6:57PM||Wednesday May 24, 2017 9:25 AM AST (13:25 UTC)||Moonrise 4:50AM||Moonset 5:51PM||Illumination 1%|
EDIT (on/off)  Help
|AMZ735 Coastal Waters Of Southern Puerto Rico Out 10 Nm- 436 Am Ast Wed May 24 2017 |
.small craft should exercise caution...
Today..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers through the day.
Tonight..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers through the night.
Thursday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Thursday night..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Friday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
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.
Sunday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
|AMZ700 436 Am Ast Wed May 24 2017 |
Synopsis for puerto rico and the uS. Virgin islands waters... Surface high pressure over the western atlantic will continue build and spread eastward into the central atlantic through the end of the work week. As a result, winds and seas are expected to slightly increase today through Thursday creating slightly choppy conditions across the local waters.
7 Day Forecast for Marine Location Near Playita Cortada, PRHourly EDIT Help
Area Discussion for - San Juan, PR  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxca62 tjsj 240810|
area forecast discussion
national weather service san juan pr
410 am ast Wed may 24 2017
Synopsis Mostly fair and relatively dry weather conditions
with high concentrations of saharan dust particulates will
continue through the end of the week. An upper level ridge is
forecast to hold over the region until at least Friday. Surface
high across the central atlantic will maintain an easterly trade
wind flow across the region for most of the forecast period. A
wetter pattern is possible early next week as a tropical wave
moves across the local islands.
Short term Today through Friday...
partly cloudy skies prevailed across puerto rico and the u.S. Virgin
islands overnight. No shower activity was observed over land areas.
A very dry airmass will continue to dominate the local region for
the next few days as an upper level ridge continues in total control
of the local weather. Saharan dust will continue across the region
today. As a result, hazy skies can be expected. A southeast wind
flow will promote higher than normal temperatures along the northern
slopes of puerto rico this afternoon.
Model guidance suggests that saharan air layer is expected to
continue affecting the local region through at least Friday. This
will maintain hazy skies and warmer than normal temperatures across
the region for the next several days. However, by Friday an increase
in moisture is expected. Therefore, an increase in shower activity
is then expected as this moisture, combined with strong daytime
heating, sea breeze convergence and mountains lifting will induce
showers and possible thunderstorms development over central
interior, western and northwest puerto rico Friday afternoon.
Significant precipitation is not expected to affect the u.S. Virgin
Long term Saturday through Thursday...
an upper level low and an associated trough is forecast to develop
just to the east northeast of the region during the upcoming
weekend. This feature is expected to erode the mid to upper level
ridge that persisted over the region for the last few days.|
However, the upper trough axis is forecast to remain east of the
region, maintaining the islands on the subsidence side of the
trough. Surface high pressure across the central atlantic is
expected to maintain moderate easterly trade winds across the
region until early next week. Optical thickness model guidance
suggests that the saharan air layer will persist over the
region through most of the work week and into the upcoming
weekend, resulting in hazy and a relatively dry airmass across the
local islands. Latest surface analysis depicted a tropical wave
across the tropical atlantic. This wave will continue to move
westward and approach to the lesser antilles late Monday and
Tuesday. It is then forecast to move over the eastern caribbean
and over the local islands Tuesday through Wednesday. This feature
should bring an increase in tropical moisture transport and
consequently increase the chance for showers and thunderstorms
over the local islands and surrounding waters next week.
Aviation Vfr conditions will prevail across all TAF sites through
at least 24 16z. Vcsh can be expected across tjmz and tjbq with
mountain obscurations. Low level winds will be mainly southeast at
10 to 15 kts with higher gusts.
Marine High pressure building north of the region will aid in
slightly increasing the trade winds across the surrounding waters,
resulting in posible seas building up to 6 feet across the atlantic
waters and local passages through Wednesday. Marine conditions will
then gradually improve through the weekend when seas subsiding to
4 feet or less across most of the waters.
Preliminary point temps pops
Sju 91 80 91 79 10 10 10 10
stt 89 80 88 79 10 10 10 10
Sju watches warnings advisories
Short term... Fc
long term... .Jf
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|
|42085 - Southeast of Ponce, PR||9 mi||56 min||E 16 G 19||84°F||1017.3 hPa|
|JOXP4 - Jobos Bay Reserve, Puerto Rico||12 mi||101 min||ENE 4.1||82°F||1018 hPa||73°F|
|IMGP4||31 mi||21 min||ESE 18 G 25||84°F|
|MGIP4 - 9759110 - Magueyes Islands, PR||32 mi||38 min||SE 2.9 G 8.9||84°F||83°F||1017.8 hPa|
|YABP4 - 9754228 - Yabucoa Harbor, PR||33 mi||38 min||E 7 G 11|
|AROP4 - 9757809 - Arecibo, PR||37 mi||38 min||E 4.1 G 8.9||82°F|
|SJNP4 - 9755371 - San Juan, PR||38 mi||38 min||ESE 12 G 15||83°F||82°F||1018.3 hPa|
|41053 - San Juan, PR||39 mi||86 min||E 12 G 16||82°F||81°F||3 ft||1017.3 hPa (+1.7)|
|MGZP4 - 9759394 - Mayaguez, PR||41 mi||38 min||NW 1.9 G 4.1||81°F||86°F||1017.8 hPa|
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
Wind History from JPS (wind in knots)
|1 day ago||Calm||Calm||Calm||Calm||NE|
|2 days ago||NE||Calm||Calm||Calm||NE|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Playa Cortada |
Click for Map
Wed -- 04:50 AM AST Moonrise
Wed -- 05:50 AM AST Sunrise
Wed -- 06:32 AM AST 0.77 feet High Tide
Wed -- 09:40 AM AST -0.15 feet Low Tide
Wed -- 05:50 PM AST Moonset
Wed -- 06:54 PM AST Sunset
Wed -- 09:45 PM AST 0.97 feet High Tide
Wed -- 10:46 PM AST 0.69 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Playa de Ponce |
Click for Map
Wed -- 04:50 AM AST Moonrise
Wed -- 05:51 AM AST Sunrise
Wed -- 11:49 AM AST -0.14 feet Low Tide
Wed -- 05:51 PM AST Moonset
Wed -- 06:55 PM AST Sunset
Wed -- 09:30 PM AST 0.76 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Puerto Rico EDIT
Wind Forecast for (9,2,3,4)(on/off)  Help
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