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 6:00AM||Sunset 6:44PM||Sunday April 22, 2018 2:22 PM AST (18:22 UTC)||Moonrise 12:00PM||Moonset 12:26AM||Illumination 49%|
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|AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 946 Am Ast Sun Apr 22 2018 |
.small craft should exercise caution...
Rest of today..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northeast swell around 4 feet. Isolated showers.
Tonight..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northeast swell around 4 feet shifting to the west after midnight. Scattered showers.
Monday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. West swell around 4 feet. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Monday night..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated Thunderstorms in the evening. Numerous showers through the night.
Tuesday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Wednesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Thursday..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 946 Am Ast Sun Apr 22 2018 |
Synopsis for puerto rico and the uS. Virgin islands waters... Surface high pressure systems across the west and northeast atlantic will continue to produce a moderate to locally fresh wind flow across the regional waters through early next week. Winds and seas will slightly increase across portions of the offshore atlantic on Monday as a northerly swell arrives, and the high pressure ridge builds north of the area. Isolated Thunderstorms will be possible across portions of the local passages and near shore atlantic waters this afternoon.
7 Day Forecast for Marine Location Near Lomas, PRHourly EDIT Help
Area Discussion for - San Juan, PR  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxca62 tjsj 221434|
area forecast discussion
national weather service san juan pr
1034 am ast Sun apr 22 2018
Update No change to the inherited forecast package at this time.
Recent tjsj 22 18z suggest a gradual erosion of low level moisture
with precipitable water now down to around 1.35 inches compared to
1.70 inches yesterday. Low level winds have become more northeasterly
today which suggest any afternoon convection that form across the
interior should steer more west southwest towards coastal areas.
In addition isolated thunderstorms will be likely due to the erosion
of the upper ridge and the proximity of an upper short wave trough
to out west.
Aviation No change to previous avn discussion. OverallVFR conds.
Aftn shra isold still fcst ovr ctrl mtn range and W sections of pr
til 22 18z.
Marine update Overall seas continued between 4 to 6 feet and winds
of 15 to 20 kts across the coastal waters. Small craft should exercise
caution across most coastal waters and passages. A slight increase
in winds and seas is expected across the offshore atlantic overnight
through Monday due to a surface high pressure north of the region and
the arrival of a northerly swell.
Prev discussion issued 449 am ast Sun apr 22 2018
synopsis... Strong surface high pressure across the central atlantic
will continue to dominate the local area through the rest of the
weekend. An increase in low level moisture is expected early next
week. Upper level trough will dominates the western atlantic
Monday through Wednesday next week.
Short term... Today through Tuesday...
today looks like it will be a bit less active than the past few
days. The drier air moving in and ene wind flow will cause a few
brief showers to affect ne-pr and the usvi in the morning but the
accumulations will be minimal. Then in the afternoon, the shower and
possible thunderstorm development should be mostly across the
southwestern quadrant of puerto rico with some showers also expected
across the higher elevations of eastern and central pr, but the|
chance of thunderstorms is higher across sw-pr. This drier air will
be short lived as higher moisture will be moving in for Monday and
Tuesday, at the same time an upper trough will be just to our west,
which should have an impact in the local instability. So the shower
and thunderstorm activity and coverage should be more significant on
Monday and Tuesday, especially for puerto rico as the local effects
combine with the upper level dynamics to produce persistent
thunderstorms in the afternoons. The usvi and the rest of the local
forecast area should observe an overall increase in shower activity
but thunderstorms are more probable over puerto rico.
Long term... Wednesday through Monday...
upper level ridge will build across the northeast caribbean
through this period. However, for mid week an increase in low
level moisture is forecast by computer models. As a result, better
chances for shower and thunderstorm development can be expected
Wednesday and Thursday. For the rest of the period, seasonable
weather conditions are expected.
Aviation...VFR conds expected through the forecast period across
the local terminals. Vcsh for tjsj, tist, and tisx through 22 14z,
then after 22 17z, shra tsra expected in the vicinity of tjps with
possible tempo MVFR at tjmz until about 22 22z. Winds will be mainly
from the E to ene at about 10-15kt with occasional gusts.
Marine... Seas between 4 to 6 feet and winds of 15 to 20 kts are
expected to prevail across the coastal waters. Small craft should
exercise caution across most coastal waters.
Preliminary point temps pops
Sju 86 76 87 75 40 60 60 60
stt 87 76 86 75 20 40 40 40
Sju watches warnings advisories
Vi... High rip current risk until 6 pm ast this evening for st croix.
Short term... Ram
long term... .Ram
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||16 mi||52 min||80°F||81°F||1016.1 hPa|
|YABP4 - 9754228 - Yabucoa Harbor, PR||16 mi||52 min||85°F|
|41056||25 mi||52 min||E 12 G 14||80°F||1015.9 hPa|
|JOXP4 - Jobos Bay Reserve, Puerto Rico||27 mi||97 min||E 9.9||85°F||1016 hPa||70°F|
|CLBP4 - 9752235 - Culebra, PR||33 mi||52 min||82°F||81°F||1015.8 hPa|
|AROP4 - 9757809 - Arecibo, PR||43 mi||52 min||NE 11 G 18|
Wind History for Fajardo, PR(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|San Juan, Luis Munoz Marin International Airport, PR||11 mi||26 min||ENE 17||10.00 mi||Mostly Cloudy||82°F||70°F||67%||1015.4 hPa|
Wind History from JSJ (wind in knots)
|1 day ago||E|
|2 days ago||E|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Boca De Cangrejos |
Click for Map
Sun -- 12:26 AM AST Moonset
Sun -- 02:43 AM AST 1.45 feet High Tide
Sun -- 06:02 AM AST Sunrise
Sun -- 09:29 AM AST 0.48 feet Low Tide
Sun -- 12:00 PM AST Moonrise
Sun -- 02:03 PM AST 0.78 feet High Tide
Sun -- 05:46 PM AST First Quarter
Sun -- 06:42 PM AST Sunset
Sun -- 08:20 PM AST 0.04 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
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|Vieques Passage |
Click for Map
Sun -- 12:20 AM AST 0.00 knots Slack
Sun -- 12:24 AM AST Moonset
Sun -- 03:45 AM AST 0.75 knots Max Flood
Sun -- 06:00 AM AST Sunrise
Sun -- 06:54 AM AST -0.00 knots Slack
Sun -- 10:24 AM AST -0.89 knots Max Ebb
Sun -- 11:59 AM AST Moonrise
Sun -- 02:04 PM AST 0.00 knots Slack
Sun -- 04:50 PM AST 0.55 knots Max Flood
Sun -- 05:46 PM AST First Quarter
Sun -- 06:41 PM AST Sunset
Sun -- 07:49 PM AST -0.00 knots Slack
Sun -- 10:41 PM AST -0.51 knots Max Ebb
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 (14,3,4,5)(on/off)  Help
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