Friday, September20, 2019 L-36.com


Marine Weather and Tides
Emajagua, 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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:10AMSunset 6:22PM Friday September 20, 2019 5:08 PM AST (21:08 UTC) Moonrise 10:57PMMoonset 11:26AM Illumination 58% Phase: Waning Gibbous; Moon at 21 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- 409 Pm Ast Fri Sep 20 2019
Tonight..East winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 12 seconds. Southeast swell around 4 feet in the evening. Isolated showers.
Saturday..Southeast winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Isolated showers.
Saturday night..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds.
Sunday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Isolated Thunderstorms in the morning. Scattered showers through the day.
Sunday night..East winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Monday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Tuesday..West winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Numerous showers and scattered Thunderstorms.
Wednesday..Northwest winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Numerous showers and scattered Thunderstorms.
AMZ700 409 Pm Ast Fri Sep 20 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A series of swells will continue through the upcoming weekend, maintaining hazardous marine conditions. The first swell is occurring from the north-northwest, associated with hurricane humberto, and will impact the region through today and into the weekend. The second swell will result from hurricane jerry, which is forecast to pass north of the region tonight and tomorrow. As jerry passes by, showers and Thunderstorms associated with the outer bands of the storm could impact the regional waters through Saturday.


7 Day Forecast for Marine Location Near Emajagua, PR
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location: 18, -65.88     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 201737
afdsju
area forecast discussion
national weather service san juan pr
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 700 miles east
of the windward islands, and will move into the caribbean sea
this weekend. The national hurricane center gives the wave a 30%
chance of development in the next 5 days. Long-range models
currently expect the system to bring a lot of precipitation our
direction for 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 very 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-southwest.

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

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

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... Ram
long term... .Mb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
YABP4 - 9754228 - Yabucoa Harbor, PR 5 mi57 min 91°F 76°F
JOXP4 - Jobos Bay Reserve, Puerto Rico 18 mi84 min SE 6 88°F 1012 hPa76°F
ESPP4 - 9752695 - Esperanza, PR 23 mi51 min SE 6 G 8 88°F 87°F1011.5 hPa
41056 28 mi69 min ENE 5.8 G 7.8 85°F 86°F5 ft1010.2 hPa (-0.9)
SJNP4 - 9755371 - San Juan, PR 34 mi51 min ENE 13 G 18 86°F 86°F1011.1 hPa
41053 - San Juan, PR 35 mi69 min ENE 14 G 18 86°F 86°F5 ft1010.1 hPa (-0.9)
42085 - Southeast of Ponce, PR 36 mi69 min ESE 5.8 G 5.8 86°F 86°F2 ft1010.1 hPa (-1.3)
CLBP4 - 9752235 - Culebra, PR 37 mi57 min 90°F 88°F1011.2 hPa

Wind History for Yabucoa Harbor, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR30 mi73 minENE 1510.00 miPartly Cloudy88°F75°F68%1010.9 hPa

Link to 5 minute data for TJSJ

Wind History from JSJ (wind in knots)
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Last 24hrSE7E9SE4E5S3CalmSE3CalmCalmCalmCalmCalmCalmCalmSE3E4E9E10E9NE13NE14NE16NE13E15
1 day agoSE7SE6S6E7E6E7SE4E7E7SE4SE3CalmCalmS3SE5SE4E7E10E12E12
G23
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2 days agoE9E13E9E9E4E3CalmE4SE5SE3SE3SE4CalmSE4SE3SE3E8E15E13E16
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Tide / Current Tables for Puerto Maunabo, Puerto Rico
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Puerto Maunabo
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Fri -- 04:29 AM AST     0.22 feet Low Tide
Fri -- 06:12 AM AST     Sunrise
Fri -- 11:25 AM AST     Moonset
Fri -- 03:43 PM AST     0.81 feet High Tide
Fri -- 04:21 PM AST     0.80 feet Low Tide
Fri -- 06:21 PM AST     Sunset
Fri -- 08:40 PM AST     0.81 feet High 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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0.60.50.40.30.20.20.20.30.40.40.50.60.70.70.80.80.80.80.80.80.80.80.80.8

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
Click for Map
Fri -- 12:44 AM AST     0.00 knots Slack
Fri -- 03:14 AM AST     0.38 knots Max Flood
Fri -- 05:54 AM AST     -0.00 knots Slack
Fri -- 06:11 AM AST     Sunrise
Fri -- 08:51 AM AST     -0.45 knots Max Ebb
Fri -- 11:25 AM AST     Moonset
Fri -- 11:35 AM AST     0.00 knots Slack
Fri -- 03:06 PM AST     0.70 knots Max Flood
Fri -- 06:20 PM AST     Sunset
Fri -- 06:24 PM AST     -0.00 knots Slack
Fri -- 09:51 PM AST     -0.75 knots Max Ebb
Fri -- 10:55 PM AST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.20.10.30.40.30.2-0-0.2-0.4-0.4-0.4-0.20.10.40.60.70.60.40.1-0.2-0.5-0.7-0.7-0.7

Weather Map
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wmap_A
GEOS 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.
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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.