Thursday, February21, 2019 L-36.com


Marine Weather and Tides
Jobos, PR

Version 3.4
What's New / NOTES
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 6:47AMSunset 6:28PM Thursday February 21, 2019 6:00 PM AST (22:00 UTC) Moonrise 8:48PMMoonset 8:29AM Illumination 94% Phase: Waning Gibbous; Moon at 17 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- 431 Pm Ast Thu Feb 21 2019
.small craft should exercise caution...
.small craft advisory in effect from Saturday morning through Saturday evening...
Tonight..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 night.
Friday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Friday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Saturday..East winds 20 to 25 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Saturday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Sunday..Northeast winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Monday..Northeast winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Tuesday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Scattered showers.
AMZ700 431 Pm Ast Thu Feb 21 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure will remain north of the region through the weekend, resulting in fresh to locally strong easterly winds. Under this wind flow, hazardous marine conditions are expected over the next several days.


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 212121
afdsju
area forecast discussion
national weather service san juan pr
521 pm ast Thu feb 21 2019

Synopsis Fair weather conditions are expected to prevail
through most of the forecast period. Although fragments of low
level moisture embedded in the trades will bring isolated to
scattered shower activity into the forecast area, the presence of
a ridge aloft will limit any chance for significant rainfall
accumulations. However, the latest model guidance suggest that an
increase in moisture transport and shower activity can be
expected by midweek as the ridge aloft erodes. The combination of
two surface high pressures will maintain breezy conditions through
most of the forecast period.

Short term Tonight through Saturday...

a strong surface high pressure will continue to drift north of
the region until it weakens by Saturday evening. At the same
time, another strong surface high pressure will move off the east
coast of the united states and north of the region as it builds
and moves eastward into the north central atlantic. These features
will maintain a fresh to locally strong east wind flow across the
region that will continue to generate hazardous marine and
coastal conditions through the short- term forecast period.

Although mostly fair and dry weather conditions are expected
during the next few days, a slight increase in shower activity is
expected on Friday with the entrance of low-level moisture
fragments, associated to the remnants of a frontal boundary. So
far, significant rainfall accumulations are not expected since a
ridge aloft will hold overhead, suppressing the development of
deep convection through the entire short-term forecast period.

Long term Sunday through Friday...

Prev discussion issued 515 am ast Thu feb 21 2019
ridging aloft will continue to maintain a fair weather pattern
across the forecast area through Monday. However, occasional
patches of low-level moisture embedded within the easterly trade
wind flow will move over the area to result in brief periods of
trade wind showers. Rainfall accumulations, however, should remain
minimal.

Current model guidance shows the mid to upper-level ridge to erode
somewhat by midweek next week as a broad polar trough moves over
the atlantic. This would weaken the trade wind cap and allow an
increase in the moisture content over the area. If this scenario
verifies, the potential is there for better showers to affect the
forecast area by the middle to latter half of next week.

Aviation MainlyVFR conditions are expected to prevail across all
terminals during the next 24 hours. However, quick passing showers
are possible across the leeward usvi eastern pr terminals overnight
into early Friday morning. Low level winds will continue from the
east between 15-25 kt.

Marine The latest model guidance suggests that hazardous
marine conditions are expected to continue over the next several
days with seas up to 8 feet and fresh to locally strong east winds
ranging between 15 to 25 knots with higher gusts. As a result,
small craft advisories (sca) continue in effect. Important to
mention that the latest guidance delays SCA criteria for coastal
waters north and south of the u.S. Virgin islands, vieques and
culebra until Friday morning, whereas only wind SCA criteria is
expected across the coastal waters of south of puerto rico on
Saturday. No additional editing was required and the hazards grids
were updated accordingly. Although scas were extended through
Sunday evening, model suggest that hazardous conditions may
continue through at least early next week, particularly for the
atlantic and caribbean waters, as well as the local passages.

As of coastal conditions, a high risk of rip currents (hrrc) is
in effect for beaches along the northwest coast of puerto rico and
east coast of saint croix. Models suggested a delay in high risk
of rip currents for beaches along the north central to northeast
coast of puerto rico until Friday morning, while it also suggested
that a high risk of rip currents is needed for beaches along the
mayaguez and vicinity coast of puerto rico. In the meantime, a
moderate risk of rip currents will continue for these areas and
the rest of the local beaches. The surf height along the east
coast of saint croix were increased to meet hrrc criteria for
continuity purposes, thus, grids were edited and updated
accordingly. This conditions should continue through at least
Sunday morning, progressively improving thereafter.

Preliminary point temps pops
Sju 74 85 73 84 40 40 40 30
stt 74 85 73 84 40 40 20 20

Sju watches warnings advisories
Pr... High rip current risk from Friday morning through late Saturday
night for culebra-north central-northeast-san juan and
vicinity-southeast.

High rip current risk through late Saturday night for northwest.

High rip current risk from Friday evening through late Saturday
night for mayaguez and vicinity.

Vi... High rip current risk from Friday evening through late Saturday
night for st.Thomas... St. John... And adjacent islands.

High rip current risk through late Saturday night for st croix.

Am... Small craft advisory from 8 am to 8 pm ast Saturday for coastal
waters of southern puerto rico out 10 nm.

Small craft advisory until 8 pm ast Sunday for anegada passage
southward to 17n-atlantic waters of puerto rico and usvi
from 10 nm to 19.5n-caribbean waters of puerto rico from 10
nm to 17n-coastal waters of northern puerto rico out 10 nm-
mona passage southward to 17n.

Small craft advisory from 8 am Friday to 8 am ast Sunday for
coastal waters of northwestern 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.

Short term... Tw
long term... .Icp
aviation... ..Ds


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
JOXP4 - Jobos Bay Reserve, Puerto Rico 4 mi76 min E 8.9 83°F 1019 hPa62°F
YABP4 - 9754228 - Yabucoa Harbor, PR 19 mi49 min 83°F 67°F
42085 - Southeast of Ponce, PR 20 mi61 min ENE 19 G 23 80°F5 ft1016.4 hPa (-1.2)
SJNP4 - 9755371 - San Juan, PR 37 mi49 min E 15 G 19 80°F 79°F1018.2 hPa
41053 - San Juan, PR 38 mi61 min E 16 G 19 80°F 79°F5 ft1017.3 hPa (-0.9)
ESPP4 - 9752695 - Esperanza, PR 38 mi49 min ESE 11 G 15 80°F 80°F1017.9 hPa
41056 43 mi61 min E 14 G 18 79°F 79°F1017.4 hPa (-0.8)
MGIP4 - 9759110 - Magueyes Islands, PR 47 mi49 min SE 6 G 17 82°F 79°F1017.5 hPa
AROP4 - 9757809 - Arecibo, PR 48 mi43 min ENE 8 G 13

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--------------------------------------E5NE5NE5--Calm
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2 days ago------------------------------------------------

Tide / Current Tables for Arroyo, Puerto Rico
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Arroyo
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Thu -- 01:07 AM AST     -0.22 feet Low Tide
Thu -- 06:48 AM AST     Sunrise
Thu -- 08:28 AM AST     Moonset
Thu -- 12:36 PM AST     0.53 feet High Tide
Thu -- 01:28 PM AST     0.13 feet Low Tide
Thu -- 06:27 PM AST     Sunset
Thu -- 08:47 PM AST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Punta Tuna, Puerto Rico
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Punta Tuna
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Thu -- 02:08 AM AST     0.15 feet Low Tide
Thu -- 06:47 AM AST     Sunrise
Thu -- 08:27 AM AST     Moonset
Thu -- 10:39 AM AST     0.64 feet High Tide
Thu -- 06:18 PM AST     0.39 feet Low Tide
Thu -- 06:26 PM AST     Sunset
Thu -- 08:46 PM AST     Moonrise
Thu -- 08:51 PM AST     0.40 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map and Satellite Images
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wmap_A
GOES Local Image of    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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (17,4,5,8)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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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.