Marine Weather and Tides
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.
|Sunrise 6:28AM||Sunset 6:39PM||Friday March 22, 2019 8:10 PM AST (00:10 UTC)||Moonrise 8:30PM||Moonset 7:49AM||Illumination 96%|
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 221839|
area forecast discussion
national weather service san juan pr
239 pm ast Fri mar 22 2019
Synopsis A weak surface trough has moved across the area today
but drier air is already filtering from the east. Fair weather
conditions are expected during the weekend, but diurnally induced
showers are still possible each afternoon. Another surface trough
will move from the east on Sunday. A broad surface high will move
from the western atlantic into the central atlantic by early next
week, this will maintain an east to southeast wind flow across the
region. An upper level trough and another induced surface trough
are forecast to increase shower activity once again by midweek
Short term Today through Sunday...
a weak surface trough moved across the islands during the day and
this resulted in passing showers across the southern sections of
puerto rico during the morning hours, this was followed by
scattered showers over the eastern, interior and northwest
sections of puerto rico during the early afternoon hours. As of 3
pm, estimated rainfall amounts were less than an inch of a rain
with the heaviest showers. Streamers developed off the u.S.
Virgin islands, but no significant rainfall was observed over land
areas. Light showers could linger into the evening hours over
western pr, but drier air moving from the east will result in
mostly clear skies and rain free conditions across the rest of the
area through Saturday morning.
The mid level ridge northeast of the region will maintain an
overall dry air mass on Saturday, while a weak mid level trough
northwest of the region should not have a significant impact on
the local weather conditions. Regardless, diurnally induced
afternoon showers are still expected over the western sections of
pr and from streamers off the usvi. On Sunday, another surface
trough is expected to move from the east and this will increase
shower activity once again across the islands.
Long term Monday through Friday...
issued 451 am ast Fri mar 22 2019
a short-wave trough over the eastern caribbean will allow
moisture to pool across the local region early next week. With a
weak cap and higher moisture content, showers will likely to
develop across portions of the islands especially over the west
interior and northwest puerto rico each afternoon. Conditions
will become more favorable for showers on Wednesday as a long|
wave trough establishes north of the area. The trough will be
strong enough to push a frontal boundary closer to the local
islands. With deeper moisture pooling across the islands and good
upper level dynamics, the environmental conditions will favor the
development of organized convection. If this unsettled pattern
materializes, the local islands may see some beneficial rainfall
later in the week.
Aviation Vfr conditions will persist across all terminals.
Shra will spread over and to the north of the cordillera central
through the evening hours. This activity will affect the vcty of
tsju tjps through at least 22 22z. Tempos in place for tjbq tjmz
btwn 23 18-20z due to occasional bkn ceiling between fl025-040 and
reduce vis around 5sm during this period. E-se between 10-15
knots with sea breeze variations, becoming light and variable
after 22 23z.
Marine Seas are expected to continue between 2-5 feet in
general across the regional waters through Saturday. A northerly
swell is forecast to increase seas between 4-6 feet between Sunday
and early next week, mainly across the atlantic waters and across
portions of the local passages. Small craft operators should
exercise caution then. East to southeast winds will prevail in
general through next week between 10-15 knots. However, a surface
trough will move from the east on Sunday Monday and a more east
wind flow is expected. Scattered showers will also increase
during this period across most of the local waters.
A moderate risk of rip currents will continue across most of the
east and north facing beaches of the islands through the weekend.
The northerly swell may increase the risk to high across the
northern beaches of pr on Sunday.
Preliminary point temps pops
Sju 74 86 74 87 20 20 30 30
stt 75 85 74 85 0 20 40 40
Sju watches warnings advisories
Short term... Gl
long term... .Ds
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||40 min||79°F||81°F||1015.9 hPa|
|42085 - Southeast of Ponce, PR||20 mi||70 min||E 12 G 14||80°F||3 ft||1014.7 hPa (+1.3)|
|MGZP4 - 9759394 - Mayaguez, PR||23 mi||46 min||77°F||81°F||1015.8 hPa|
|AROP4 - 9757809 - Arecibo, PR||26 mi||70 min||E 6 G 9.9|
|JOXP4 - Jobos Bay Reserve, Puerto Rico||30 mi||85 min||E 7||79°F||1017 hPa||70°F|
|PTRP4||32 mi||35 min||E 5.1 G 8||77°F|
|41115 - Rincon, Puerto Rico (181)||34 mi||40 min||80°F||3 ft|
|SJNP4 - 9755371 - San Juan, PR||42 mi||46 min||80°F||80°F||1016.2 hPa|
|41053 - San Juan, PR||43 mi||40 min||ESE 12 G 16||80°F||1015.3 hPa|
|YABP4 - 9754228 - Yabucoa Harbor, PR||49 mi||40 min||81°F||70°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
Click EDIT to select an airport
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
EDIT (on/off)  Help One Week of Data
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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for (20,4,5,8)(on/off)  Help
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