Friday, September20, 2019 L-36.com


Marine Weather and Tides
Candelaria Arenas, PR

Version 3.4
NOTICE
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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Sunrise 6:12AMSunset 6:24PM Friday September 20, 2019 9:28 PM AST (01:28 UTC) Moonrise 10:58PMMoonset 11:28AM Illumination 56% Phase: Waning Gibbous; Moon at 22 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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AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 905 Pm Ast Fri Sep 20 2019
.small craft advisory in effect through late Saturday night...
Rest of tonight..East winds 5 to 10 knots veering southeast after midnight. Seas 8 to 10 feet with occasional seas up to 11 feet. Dominant period 13 seconds. North swell 6 to 8 feet. Isolated showers.
Saturday..South winds 5 to 10 knots veering north in the afternoon. Seas 8 to 10 feet with occasional seas up to 13 feet. Dominant period 13 seconds. North swell 7 to 9 feet. Numerous showers through the day. Isolated Thunderstorms in the afternoon.
Saturday night..South winds 5 to 10 knots backing southeast after midnight. Seas 8 to 10 feet with occasional seas up to 11 feet. Dominant period 13 seconds. North swell 5 to 9 feet. Isolated showers through the night.
Sunday..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 12 seconds. North swell 4 to 6 feet. Numerous showers and isolated Thunderstorms.
Sunday night..Southeast winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 12 seconds. North swell 4 to 5 feet. Isolated showers.
Monday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Scattered showers.
Tuesday..South winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Numerous showers and isolated Thunderstorms.
Wednesday..South winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 11 seconds. Numerous showers and scattered Thunderstorms.
AMZ700 905 Pm Ast Fri Sep 20 2019
Synopsis for puerto rico and the uS. Virgin islands waters... Hazardous seas will continue through the weekend across the atlantic waters and local passages due to a long period northerly swell and a northeast swell from hurricane jerry. As this system moves a few hundred miles north of the islands over the atlantic waters tonight and through Saturday, showers and Thunderstorms associated with the outer bands of the storm are expected to move across the regional waters through the weekend.


7 Day Forecast for Marine Location Near Candelaria Arenas, PR
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location: 18.43, -66.21     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 210124
afdsju
area forecast discussion
national weather service san juan pr
924 pm ast Fri sep 20 2019

Update
No changes were made to the inherited forecast. Hurricane jerry
will continue to move well north of the area tonight through
Saturday with some of the outer bands reaching the local islands,
resulting in periods of showers, thunderstorms and gusty winds.

On Saturday, a south-southeasterly wind flow will result in
afternoon convection developing along the interior and the
northern half of puerto rico. Passing showers and thunderstorms
will be possible as well along the u.S. Virgin islands and the
eastern and southern coast of puerto rico. By Tuesday and
Wednesday of the next workweek, a tropical wave will bring an
increase in rainfall activity across the islands.

Aviation
Rainbands from hurricane jerry will result in tsra at tncm
through the nighttime with possible tempo groups that could
result in MVFR or ifr conditions at tncm tkpk. Vcsh will be
possible at tisx tist. Although the tjsj 21 00z sounding shows
fl050 ese winds at 10 knots or less, gusty winds will be possible
with thunderstorm activity moving into the area through the
forecast period.

Marine Hazardous marine conditions will continue across the
local waters due to a northerly swell caused by the remnants of
hurricane humberto and hurricane jerry. Small craft advisories
are in effect for the atlantic offshore and coastal waters, and
mona passage through Sunday evening due to seas up to 6 to 14
feet, occasionally higher. Winds will be out of the south-southeast
at 5 to 10 knots.

The long period swell will cause breaking waves of 5 to 15 feet
and life threatening rip currents for the beaches along the
western, eastern and northern coast of puerto rico, vieques,
culebra, st.Thomas and st. Croix. In addition, coastal flooding
will be possible along all the coastline of puerto rico, except
the south, until early Sunday morning.

Please refer to the latest coastal hazard message (cfwsju) and
marine weather message (mwwsju) for the latest information.

Prev discussion issued 137 pm ast Fri sep 20 2019
synopsis...

as hurricane jerry passes to our north, a few impacts will be felt
across the region. These include rough marine conditions and
showers associated with the outer bands of the storm. These
effects will be felt into Sunday, after which a brief period of
drier air and saharan dust moves in. Our attention will then turn
to a vigorous tropical wave which the national hurricane center is
calling invest 99l. See the long term discussion for the
potential impacts of this system.

Short term... Rest of today through Sunday...

a mid to upper level high pressure ridge will continue to move in
over the local area today through the weekend. Recent high
resolution model guidance along with the overall weather pattern
continues to suggest the potential for showers and isolated
thunderstorms developing mainly across NW pr this afternoon.

Forecast models also suggest some shower activity possible over
eastern pr, but mainly in the form of isolated streamers of short
duration.

Based on the latest guidance from the national hurricane center in
miami... Hurricane jerry is expected to pass well north northeast of
the local islands late tonight through Saturday. The local wind flow
will diminish significantly beginning this afternoon and through the
weekend. However, it is quite possible that the outer feeder bands
generated from hurricane jerry will continue to propagate west and
south of the center and occasionally affect all or portions of the
islands from time to time... Becoming more frequent overnight through
early Saturday. These bands may bring sudden bursts of convection
with showers and thunderstorms and higher wind gusts. There is also
a slight possibly a few isolated gusts producing winds near tropical
force winds over portions of the forecast area particularly
around the northern usvi and portions of northern and eastern pr.

This is however based on the latest hurricane track and intensity
and is subject to change.

The local wind flow on Saturday will become more southerly as the
day progresses, although they will be fairly light under the
influence of hurricane jerry. This southerly flow will combine with
the available moisture and local effects to cause the development of
showers and thunderstorms across portions of south and east coastal
areas during the morning hours followed by central to northern
puerto rico on Saturday afternoon. Then on Sunday, another surge of
of moisture will move across the area during the morning hours,
bringing brief shower activity.

A somewhat drier air mass is expected to move in by Sunday
afternoon. However, local effects, daytime heating and available low
level moisture convergence will still favor afternoon showers and
isolated thunderstorm development mainly over parts of central
and northwestern pr.

Long term... Monday through Friday...

after the rainbands associated with hurricane jerry move out, drier
conditions are forecasted. A saharan air layer with associated dust
will filter in on Sunday and peak in concentration for Monday.

However, forecast models have backed off a bit on the strength of
the dust event, though hazy conditions are still likely. Despite the
drier air, isolated showers are still possible.

Thereafter, our weather gets more interesting as a vigorous
tropical wave moves up from the south for Monday night and into
Wednesday. Currently this tropical wave is located at several
hundred miles east of the windward islands, and will move into
the caribbean sea this weekend. The national hurricane center
gives the wave a medium chance of development during the next 5
days. Long-range models currently expect the system to bring an
increase in precipitation especially next Tuesday, where the gfs
is predicting almost 2.5 inches of precipitable water.

Furthermore, due to the projected slow movement of the storm
through our region, the possibility exists for a wet middle of
the next week with a threat for urban and small stream flooding.

Forecast models diverge substantially after mid-week, though there
does appear to be ample moisture to drive scattered showers
through the end of the week.

Aviation... Vcsh isold tsra fcst across the most local terminals
today, with ocnl feeder bands from hurricane jerry affecting parts
of the northern leewards durg the prd. This may bring brief MVFR
conds and gusty winds. This activity will later spread into the
local flying area aft 21 23z and affect local terminals from time to
time but prevailingVFR is fcst. Shra isold tsra development fm
20 17z-20 22z across NW pr with psbl vcsh vcts at tjmz tjbq...

steered by the prevailing SE wind flow. Sfc winds fm e-ene W sea
breeze variations and ocnly hir gusts... Bcmg lgt vrb aft 20 22z.

Marine...

we continue to be impacted by swells from post-tropical cyclone
huberto, as well as a rapidly weakening hurricane jerry. Buoy 41043
in the atlantic waters has measured waves of 7-9 ft throughout the
day, and seas are expected to increase as jerry passes to the ne.

The good news with jerry is that it has weakened substantially this
morning, and will be a weak hurricane or strong tropical storm, of
fairly small size as it moves north. Therefore, we are still
forecasting waves above 10 feet for the atlantic, but not as much as
was expected. Winds will range between 5 to 15 knots, but variable
as hurricane jerry passes by.

The long period swell will cause breaking waves of 10 to 15 feet and
life threatening rip currents for the beaches along the western, and
northern coast of puerto rico, northern vieques, culebra, st.Thomas
and eastern st. Croix through Sunday. In addition, coastal flooding
will be possible along the coastal sections of northern puerto rico
through this evening.

Please refer to the latest coastal hazard message (cfwsju) and
marine weather message (mwwsju) for the latest information.

Preliminary point temps pops
Sju 77 91 78 92 30 60 60 60
stt 82 88 82 89 50 40 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.

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

Coastal flood advisory until 6 pm ast Saturday for mayaguez and
vicinity-north central-northeast-northwest-san juan and
vicinity-southeast.

High rip current risk through Saturday afternoon for southwest-
vieques.

High surf advisory until 6 am ast Saturday for southwest.

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

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

John... And adjacent islands.

High rip current risk through Saturday afternoon for st croix.

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

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

Small craft advisory until 8 am ast Saturday for coastal waters
of southern usvi vieques and eastern puerto rico out 10 nm.

Small craft advisory until 8 pm ast Saturday for anegada passage
southward to 17n-coastal waters of northwestern puerto rico
out 10 nm-coastal waters of southwestern puerto rico out 10
nm.

Short term... Erg
long term... .Ds


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 5 mi59 min ENE 7 G 8.9 85°F 86°F1013.4 hPa
41053 - San Juan, PR 7 mi89 min E 7.8 G 9.7 85°F 86°F6 ft1012.3 hPa (+2.1)
AROP4 - 9757809 - Arecibo, PR 26 mi59 min E 1.9 G 4.1
JOXP4 - Jobos Bay Reserve, Puerto Rico 33 mi104 min Calm 82°F 1014 hPa76°F
YABP4 - 9754228 - Yabucoa Harbor, PR 33 mi59 min 81°F 76°F
41056 41 mi89 min NNE 1.9 G 3.9 84°F 86°F5 ft1012 hPa (+1.9)
42085 - Southeast of Ponce, PR 42 mi89 min E 1.9 G 1.9 85°F 86°F2 ft1012 hPa (+1.6)
ESPP4 - 9752695 - Esperanza, PR 46 mi59 min NNW 1 G 1.9 83°F 87°F1013.8 hPa
CLBP4 - 9752235 - Culebra, PR 49 mi59 min 83°F 87°F1013.7 hPa

Wind History for San Juan, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR11 mi33 minE 510.00 miA Few Clouds84°F77°F80%1013.4 hPa

Link to 5 minute data for TJSJ

Wind History from JSJ (wind in knots)
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Last 24hrCalmSE3CalmCalmCalmCalmCalmCalmCalmSE3E4E9E10E9NE13NE14NE16NE13E15NE12E8E5E5E5
1 day agoE7SE4E7E7SE4SE3CalmCalmS3SE5SE4E7E10E12E12
G23
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2 days agoE3CalmE4SE5SE3SE3SE4CalmSE4SE3SE3E8E15E13E16
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Tide / Current Tables for San Juan, Puerto Rico
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San Juan
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Fri -- 06:12 AM AST     Sunrise
Fri -- 06:16 AM AST     0.30 feet Low Tide
Fri -- 11:27 AM AST     Moonset
Fri -- 01:31 PM AST     1.73 feet High Tide
Fri -- 06:22 PM AST     Sunset
Fri -- 08:02 PM AST     0.79 feet Low Tide
Fri -- 10:57 PM AST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.21.110.80.60.40.30.30.50.711.31.61.71.71.61.41.210.80.80.80.91

Tide / Current Tables for Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
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Boca De Cangrejos
Click for Map
Fri -- 12:23 AM AST     0.86 feet High Tide
Fri -- 06:12 AM AST     Sunrise
Fri -- 06:43 AM AST     0.07 feet Low Tide
Fri -- 11:27 AM AST     Moonset
Fri -- 02:01 PM AST     1.31 feet High Tide
Fri -- 06:22 PM AST     Sunset
Fri -- 08:29 PM AST     0.54 feet Low Tide
Fri -- 10:57 PM AST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.80.70.60.40.20.10.10.20.30.60.91.11.31.31.31.10.90.80.60.60.60.60.7

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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.