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 5:51AM||Sunset 6:57PM||Thursday May 23, 2019 10:43 AM AST (14:43 UTC)||Moonrise 11:20PM||Moonset 9:55AM||Illumination 79%|
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 230908|
area forecast discussion
national weather service san juan pr
508 am ast Thu may 23 2019
A mid- to upper-level low northwest of the islands will dominate
the local weather conditions through the upcoming weekend. This
feature along with plenty of tropical moisture will enhance the
formation of showers and thunderstorms throughout the day. As this
feature moves eastward, weather conditions should improve
somewhat Friday and Saturday. However, locally induced showers
and thunderstorms are expected each afternoon.
Short term Today through Saturday...
a light to moderate east to southeast wind flow will prevail across
the region. A mid to upper level southeastward propagating trough
will continue to sink across the western atlantic and remain north
of the region through the short term forecast period. As this
feature approaches the forecast area, favorable conditions with a
divergence pattern aloft will persist today. These conditions
combined with plenty tropical moisture--model precipitable water
estimates between 1.7 and 2.0 inches--will result in enhanced shower
and thunderstorm development. However, a layer of mid to upper level
clouds could significantly reduce the impact of these conditions
and limit the intensity and areal coverage of this activity.
Overall, overnight and morning showers are expected to stream over
the waters into portions of eastern and southern puerto rico, as
well as over the u.S. Virgin islands. As the day progresses, the
bulk of this activity is forecast to shift and cluster along the
interior and western sectors of puerto rico. Showers and isolated
thunderstorm are possible over the san juan metropolitan area, the
u.S. Virgin islands and local waters. Rainfall accumulations are
forecast to peak between 1-2 inches with isolated higher amounts. As
a result, there is a potential for urban and small streams flooding,
as well as mudslides in areas near steep terrain.
Conditions aloft are to gradually turn unfavorable as the mid to
upper level trough continues to drift eastward and away from the
region on Friday into the weekend. Although conditions are expected
to improve during this period, afternoon convection is still
expected to develop and affect the interior and western sectors of
puerto rico each day. Rainfall accumulations are forecast to peak
at around an inch on Friday and half an inch on Saturday with
isolated higher amounts. Given that soils are saturated, the
potential for urban and small stream flooding will continue,
particularly across the northwestern quadrant of puerto rico.
Long term Sunday through Thursday...
model guidances continue to show plenty of tropical moisture next
week. However, model guidance is now backing-up about the final
position of the amplifying trough aloft. Although pw values could
peak between 1.7 and 2.2 inches, the upper-level dynamic could
fade-away during that period. Confidence is low to moderate due to
inconsistencies in the previous solutions. But, if model guidance
is correct, shower and thunderstorm activity will be associated
to low level convergence, and local and diurnal effects through
at least Tuesday.
A tropical wave is forecast to move off to the south of the
islands by Wednesday. Then, another mid- to upper-level trough is
forecast to amplify from the northwest near the islands by
Thursday, which could interact with the lingering tropical
Aviation MainlyVFR conds expected through at least 23 16z.
However, brief shra will result in vcsh at tjsj tist tisx tncm tkpk.
Enhanced afternoon convection will result in vcsh vcts with bkn
to ovc at fl025-030 at tjmz tjbq tjps between 23 16z and 03 06z,
where MVFR conditions are possible. Light and variable winds will
continue, turning from the ese at 10-15 kt with sea breeze
variations and occasional gusts after 23 14z.
Mariners can expect seas of 5 feet or less across the regional
waters. East to southeast winds will prevail at 10 to 15 knots,
although local effects will promote higher winds up to 20 knots
each afternoon. A northerly swell will move across the atlantic
waters next week. There is a moderate risk of rip currents for
the north facing beaches of puerto rico.
Thunderstorm formation are expected across the western coastal
waters of puerto rico this afternoon.
Preliminary point temps pops
Sju 88 78 88 78 40 40 40 40
stt 87 78 86 77 40 40 20 30
Sju watches warnings advisories
Short term... Icp
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||50 min||SSE 6 G 9.9||84°F||83°F||1015.3 hPa|
|42085 - Southeast of Ponce, PR||20 mi||104 min||ENE 9.7 G 12||83°F||1013.6 hPa (+0.4)|
|MGZP4 - 9759394 - Mayaguez, PR||23 mi||50 min||82°F||83°F||1015.2 hPa|
|AROP4 - 9757809 - Arecibo, PR||26 mi||50 min||NE 7 G 9.9|
|JOXP4 - Jobos Bay Reserve, Puerto Rico||30 mi||89 min||ENE 2.9||85°F||1016 hPa||73°F|
|PTRP4||32 mi||34 min||NNE 2.9 G 6||83°F|
|41115 - Rincon, Puerto Rico (181)||34 mi||44 min||82°F||1 ft|
|SJNP4 - 9755371 - San Juan, PR||42 mi||50 min||ENE 9.9 G 11||81°F||82°F||1015 hPa|
|41053 - San Juan, PR||43 mi||44 min||E 9.7 G 12||81°F||81°F||2 ft||1014.1 hPa (+0.0)|
|YABP4 - 9754228 - Yabucoa Harbor, PR||49 mi||50 min||86°F||73°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 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 (10,2,3,4)(on/off)  Help
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