Saturday, March25, 2017 L-36.com


Marine Weather and Tides
Jobos, PR

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:22AMSunset 6:37PM Saturday March 25, 2017 7:39 PM AST (23:39 UTC) Moonrise 4:32AMMoonset 4:28PM Illumination 3% Phase: Waning Crescent; Moon at 28 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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AMZ735 Coastal Waters Of Southern Puerto Rico Out 10 Nm- 448 Pm Ast Sat Mar 25 2017
.small craft should exercise caution...
Tonight..South winds 5 to 10 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Southeast swell 4 to 5 feet. Scattered showers.
Sunday..South winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Sunday night..West winds 5 to 10 knots veering north after midnight. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated showers.
Monday..Northeast winds 5 to 10 knots veering southwest in the afternoon. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated showers.
Monday night..North winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Tuesday..North winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
Wednesday..Northeast winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
Thursday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
AMZ700 448 Pm Ast Sat Mar 25 2017
Synopsis for puerto rico and the uS. Virgin islands waters... The light to moderate southeast to south winds expected tonight will become lighter and from the southwest on Sunday as a surface low develops north of hispaniola. A large northerly swell has arrived in our local atlantic waters and passages and will continue through the weekend creating hazardous marine conditions. In addition showers and isolated Thunderstorms are expected across all local waters through the rest of the weekend. Another northerly swell generated by the surface low is forecast to reach the atlantic waters and passages by the middle of next week.

7 Day Forecast for Marine Location Near Jobos, PR
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location: 17.93, -66.16     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 251939
afdsju
area forecast discussion
national weather service san juan pr
339 pm ast Sat mar 25 2017

Synopsis The deep moisture and trough in the upper levels will
maintain cloudy skies across the local area with showers over the
local waters. Sfc low pressure, north of hispaniola will move
north and east slowly for the next few days, causing some clearing
tomorrow.

Short term Today through Tuesday...

the area of shower activity had moved to the east of puerto rico by
1:30 pm ast. Clouds were also thinning over the western interior
leaving a chance for thunderstorms to grow over the area still.

Showers or light rain will continue to affect the u.S. Virgin
islands.

Low pressure at the surface and in the lower levels less
than two hundred miles north of punta cana is now the primary driver
of the moist flow from the south across puerto rico and the u.S.

Virgin islands. The axis of that moisture is presently across
vieques and culebra, and will move eastward to the leeward islands
by Monday as the low moves to about 500 miles north of puerto rico.

During the same periods precipitable water will drop from 1.93 to
around 1.5 inches. As a result available moisture and instability
will decrease and shower activity and cloud cover will decrease.

Because the low will intensify as it moves north, the pressure
gradient over the local area will drop to nearly zero in a col. This
will allow sea breezes to form during the day and keep temperatures
from reaching 90 degrees over the greater metropolitan area due to
the south winds that we have had under cloudy skies at present. The
mex MOS is handling this well and it would explain why it is
forecasting only 82 degrees for a high on Wednesday with much
less moisture after forecasting 86 degrees today. The u.S. Virgin
islands will also see less moisture but it will be delayed about 24
hours, and the more significant drying will be delayed until
Tuesday. A few thunderstorms may still be possible during the next
several days--especially in the interior of puerto rico with more
sunshine on Monday.

Long term The long term guidance continues to suggest that
drier air will filter in on Wednesday and should remain fairly dry
for the rest of the workweek with winds becoming northerly on
Wednesday and Thursday then shifting to an easterly wind on Friday
an for the upcoming weekend. This general pattern should cause
mostly fair weather with isolated shower activity. Temperatures
late this upcoming week are expected to be pleasant in the low 80s
across the lower elevations with also lower dew point
temperatures, at this time the long term guidance suggest dew point
temperatures in the mid 60s across the san juan metro and the
usvi, which is at 5-7 degrees than what we have been observing
these past few days.

Aviation Some clrg is occurring WRN pr leaving isold -tsra
psbl til 25/22z nr tjmz/tjbq. Mtn obscurations will persist thru
at least 26/02z. Shra is migrating to the NE across tist/tisx,
but no MVFR conds yet. A band of mstr will apch tncm/tkpk from
the sse arnd 25/22z and may generate areas of MVFR conds for cigs
blo 025 til 26/06z. Thereafter expectVFR. Sfc winds, se-s 5 to
15 kt with local sea breeze effects along the north coast of pr
til 25/23z.

Marine Small craft advisory was extended for the local
offshore atlantic waters when taken into consideration the latest
guidance and observations. The models have been under estimating
the northerly swell and the local buoys are reporting seas of 9-11
feet across the nearshore waters to the north and northwest of
pr. Because of these wave heights and the current period of 10-12
seconds, a high surf advisory was issued and it still remains in
effect until 6 am ast Sunday. There is a high risk of rip currents
across the north, northeast and western coasts of pr as well as
many beaches in vieques, culebra, and saint thomas.

Preliminary point temps/pops
Sju 73 82 74 84 / 20 50 40 50
stt 72 82 73 83 / 50 50 50 50

Sju watches/warnings/advisories
Pr... High rip current risk through Sunday afternoon for culebra-
mayaguez and vicinity-north central-northeast-northwest-san
juan and vicinity-southeast-southwest-western interior.

Small craft advisory until 2 pm ast Sunday for northeast.

High surf advisory until 6 am ast Sunday for culebra-mayaguez
and vicinity-north central-northeast-northwest-san juan and
vicinity-southeast-western interior.

High rip current risk through late tonight for vieques.

Small craft advisory until 2 am ast Sunday for southwest.

Vi... High rip current risk through Sunday afternoon for
st.Thomas... St. John... And adjacent islands.

Small craft advisory until 2 pm ast Sunday for st.Thomas... St.

John... And adjacent islands.

High surf advisory until 6 am ast Sunday for st.Thomas... St.

John... And adjacent islands.

Am... High rip current risk through Sunday afternoon for coastal
waters of southwestern puerto rico out 10 nm-coastal waters
of northern usvi and culebra out 10 nm-coastal waters of
southern usvi vieques and eastern puerto rico out 10 nm.

Small craft advisory until 2 pm ast Sunday for anegada passage
southward to 17n-coastal waters of northwestern puerto rico
out 10 nm-coastal waters of northern puerto rico out 10 nm-
coastal waters of northern usvi and culebra out 10 nm-mona
passage southward to 17n.

High surf advisory until 6 am ast Sunday for coastal waters of
northern usvi and culebra out 10 nm-coastal waters of
southern usvi vieques and eastern puerto rico out 10 nm.

Small craft advisory until 2 am ast Sunday for caribbean waters
of puerto rico from 10 nm to 17n-coastal waters of
southwestern puerto rico out 10 nm-coastal waters of
southern usvi vieques and eastern puerto rico out 10 nm.

Small craft advisory until 8 pm ast Sunday for atlantic waters
of puerto rico and usvi from 10 nm to 19.5n.

Short term... Ws
long term... .Ja


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
JOXP4 - Jobos Bay Reserve, Puerto Rico 4 mi115 min ENE 1.9 78°F 1013 hPa72°F
YABP4 - 9754228 - Yabucoa Harbor, PR 19 mi52 min S 6 G 8
42085 - Southeast of Ponce, PR 20 mi100 min ESE 5.8 G 7.8 79°F 80°F3 ft1011.7 hPa (-0.0)
SJNP4 - 9755371 - San Juan, PR 37 mi52 min SSE 9.9 G 12
41053 - San Juan, PR 38 mi70 min SE 7.8 G 12 80°F 1011.6 hPa
ESPP4 - 9752695 - Esperanza, PR 38 mi52 min S 11 G 15 79°F 80°F1012.8 hPa
FRDP4 - 9753216 - Fajardo, PR 40 mi52 min S 6 G 8.9 78°F 73°F
VQSP4 - 9752619 - Isabel Segunda, Vieques, PR 41 mi52 min S 5.1 G 7 78°F
41056 44 mi70 min SSE 12 G 14 79°F 1011.9 hPa
MGIP4 - 9759110 - Magueyes Islands, PR 47 mi52 min SSE 2.9 G 7 79°F 80°F1012.4 hPa
IMGP4 47 mi40 min ESE 6 G 11 79°F 1011.9 hPa (+0.4)
AROP4 - 9757809 - Arecibo, PR 48 mi52 min S 6 G 8.9 80°F

Wind History for Yabucoa Harbor, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from JPS (wind in knots)
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Last 24hr----------------------------------SW6Calm--E6E7--E10
1 day ago----------------------------------CalmCalm--CalmCalmCalm--
2 days ago--NE5--E8E8E10----------------------S8E5NE5E5NE6NE5--

Tide / Current Tables for Las Mareas, Puerto Rico
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Las Mareas
Click for Map
Sat -- 12:52 AM AST     0.10 feet Low Tide
Sat -- 04:32 AM AST     Moonrise
Sat -- 06:24 AM AST     Sunrise
Sat -- 08:58 AM AST     0.60 feet High Tide
Sat -- 04:27 PM AST     0.23 feet Low Tide
Sat -- 04:28 PM AST     Moonset
Sat -- 06:36 PM AST     Sunset
Sat -- 06:51 PM AST     0.26 feet High Tide
Sat -- 07:48 PM AST     0.26 feet Low Tide
Sat -- 09:04 PM AST     0.26 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.10.10.20.30.40.50.50.60.60.60.50.40.30.30.20.20.20.20.30.30.30.20.2

Tide / Current Tables for Arroyo, Puerto Rico
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Arroyo
Click for Map
Sat -- 04:32 AM AST     Moonrise
Sat -- 06:24 AM AST     Sunrise
Sat -- 09:32 AM AST     0.70 feet High Tide
Sat -- 10:06 AM AST     0.43 feet Low Tide
Sat -- 04:27 PM AST     Moonset
Sat -- 06:36 PM AST     Sunset
Sat -- 08:23 PM AST     0.71 feet High Tide
Sat -- 10:28 PM AST     0.07 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.10.20.30.40.50.60.60.70.70.50.40.50.50.50.50.60.60.70.70.70.60.10.1

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
carb_satellite

GOES Local Image of Puerto Rico    EDIT
Geos

Wind Forecast for (19,4,5,8)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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weather_mapweather_map weather_map

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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.