Thursday, April19, 2018 L-36.com


Marine Weather and Tides
Esperanza, PR

Version 3.4
What's New / NOTES
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 6:01AMSunset 6:41PM Thursday April 19, 2018 5:26 AM AST (09:26 UTC) Moonrise 9:03AMMoonset 10:25PM Illumination 16% Phase: Waxing Crescent; Moon at 4 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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AMZ725 Coastal Waters Of Southern Usvi Vieques And Eastern Puerto Rico Out 10 Nm- 353 Am Ast Thu Apr 19 2018
.small craft should exercise caution...
Today..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 14 seconds. Northeast swell 4 to 5 feet. Scattered showers.
Tonight..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 13 seconds. East swell 4 to 5 feet. Isolated showers.
Friday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 12 seconds. East swell 4 to 5 feet. Scattered showers.
Friday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. East swell around 4 feet. Scattered showers.
Saturday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. East swell around 4 feet. Scattered showers.
Sunday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Southeast swell around 4 feet. Scattered showers.
Monday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. East swell around 4 feet. Isolated showers.
AMZ700 353 Am Ast Thu Apr 19 2018
Synopsis for puerto rico and the uS. Virgin islands waters... A moderate east to southeast wind flow will prevail today across the regional waters...becoming more easterly and locally fresh into the weekend. A long period northeast swell will move across the local waters on Thursday and slowly subside through Friday. Isolated Thunderstorms are expected on Thursday across portions of the local waters.

7 Day Forecast for Marine Location Near Esperanza, PR
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location: 18.12, -65.46     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 190259 cca
afdsju
area forecast discussion... Corrected
national weather service san juan pr
1059 pm ast Wed apr 18 2018

Update
Showers and thunderstorms moved across portions of the interior,
northeast, northern and western puerto rico this afternoon. These
showers and thunderstorms produced one to two inches of rain
across the area mentioned above. As a result urban and small
stream flood advisories were issued. At this time the showers
have dissipated over land and only remain across the local waters.

This is expected to continue through the overnight period.

Showers and isolated thunderstorms are expected to increase over
the u.S. Virgin islands during the morning, and then start across
puerto rico during the afternoon. Once again these showers and
thunderstorms could produce brief heavy rain with lightning which
could cause urban and small stream flooding. Some noticeable
changes with the GFS model are in the recent cross-section for
san juan which shows drier air from 850 mb to 700 mb. This area
is drier than the last couple of runs of the gfs. This drier air
could limit shower development across the region tomorrow and make
shower activity less widespread.

Aviation
Vrf conditions are expected to prevail for all terminals through
19 15z. Shra tsra are possible by 19 15z across terminals tjsj,
tjbq, and tjmz. Some shra tsra could cause vsby to fall to MVFR
conditions. Sfc winds east southeast ranging 5 to 10 kts.

Marine
Seas across the outer atlantic and caribbean waters will reach 7
feet on Thursday due to a northerly swell moving across the
waters. Other waterways will see seas ranging from 3 to 5 feet
with east southeast winds 10 to 16 kts. A high risk of rip
currents is in effect at 6 am Thursday for the northern, eastern
and southern beaches of puerto rico as well as the beaches of
culebra, vieques, and st. Croix.

Prev discussion issued 440 pm ast Wed apr 18 2018
synopsis... A surface trough will continue to move across the
region tonight. Showers and thunderstorms are expected to diminish
this evening, but periods of heavy rainfall and thunderstorms are
expected again on Thursday afternoon. Drier mid levels are
expected Friday through early next week. However, diurnally
induced afternoon showers with possible isolated thunderstorms are
expected each day across western pr. Elsewhere, passing showers
and light rainfall amounts are expected.

Short term... Tonight through Friday...

showers and thunderstorms developed early this afternoon just to
the north of cordillera central and along the northern sections of
puerto rico. This activity was associated with the combination of
daytime heating, local effects and the nearness of an induced
surface trough. This activity is expected to decrease over land
areas late this afternoon. For the overnight and Thursday morning
hours, scattered showers will move occasionally across the u.S.

Virgin islands, vieques, culebra as well as across the eastern
sections of puerto rico. Moisture is expected to increase again
across puerto rico Thursday afternoon as the remnants moisture of
the trough remains close to the region with showers and
thunderstorm activity expected across interior, western and part
of the metropolitan. Urban and small stream flooding is possible with
this activity. Latest satellites images as well as model guidance
indicated that dry air will move across the u.S. Virgin islands
Thursday afternoon. This drier air will move across puerto rico by
Friday. However, the combination of daytime heating and local
effects will continue to bring scattered showers, isolated
thunderstorms and localized urban and small stream flooding across
western and interior puerto rico as well as scattered showers to
areas southeast of the main islands, including saint croix Friday
and during the upcoming weekend.

Long term... Saturday through Wednesday... From previous discussion...

a broad surface high pressure will continue across the eastern
atlantic promoting moderate trades. Drier mid level air is
expected to prevail during the long term period. However, a
typical weather pattern will prevail each day with afternoon
convection developing over the western interior sections of puerto
rico and streamers forming off the smaller islands. A short wave
trough will move close on Sunday, enhancing shower and
thunderstorm development during the afternoon and some showers
will linger through the evening hours across portions of western
coastal waters.

Aviation... Periods of MVFR conds likely in and around jmz jbq in
shra tsra and possibly jsj through 18 22z. Easterly winds around 12
knots with some sea breeze variations becoming light and variable
overnight. Passing showers and isolated tstorms in and around usvi
terminals overnight. Across leeward terminals,VFR to continue.

Marine... A long period northeasterly swell will move across the
local waters on Thursday. This will cause seas to increase around
7 feet mainly across the offshore atlantic and caribbean waters
as well across the anegada and mona passage. Therefore, small
craft advisories will be in effect. Also, life threatening rip
currents are expected along the atlantic beaches of puerto rico
and portions of the southern coast of the island as well across st
thomas, vieques and st. Croix. Meanwhile seas will continue to
range between 3-6 feet tonight and winds will prevail from the
east to southeast at 10-15 knots.

Preliminary point temps pops
Sju 74 86 75 87 50 40 20 40
stt 76 85 75 86 70 20 10 30

Sju watches warnings advisories
Pr... High rip current risk from 6 am ast Thursday through late
Thursday night for central interior-culebra-north central-
northeast-northwest-ponce and vicinity-san juan and
vicinity-southeast-vieques-western interior.

Vi... High rip current risk from 6 am ast Thursday through late
Thursday night for st croix.

Am... High rip current risk from 6 am ast Thursday through late
Thursday night for coastal waters of southern puerto rico
out 10 nm.

Small craft advisory from 8 pm Thursday to 6 pm ast Friday for
caribbean waters of puerto rico from 10 nm to 17n-mona
passage southward to 17n.

Small craft advisory from 8 am Thursday to 6 pm ast Friday for
anegada passage southward to 17n-atlantic waters of puerto
rico and usvi from 10 nm to 19.5n.

Short term... 99
long term... .99


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41056 10 mi57 min ESE 16 G 21 80°F 1017.3 hPa
CLBP4 - 9752235 - Culebra, PR 15 mi45 min 79°F 81°F1017.5 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 20 mi39 min 81°F
41052 - South of St. John, Virgin Islands 38 mi57 min E 16 G 19 80°F 1016.5 hPa
LAMV3 41 mi39 min 79°F 80°F
SJNP4 - 9755371 - San Juan, PR 42 mi45 min 78°F 80°F1017.6 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 42 mi102 min NE 2.9 77°F 1017 hPa71°F
41053 - San Juan, PR 42 mi57 min ESE 12 G 16 79°F 1016.6 hPa
CHSV3 - 9751364 - Christiansted Harbor, Virgin Islands 48 mi45 min E 2.9 G 8 78°F 81°F1019 hPa
LTBV3 - 9751401 - Lime Tree Bay, VI 48 mi39 min SE 7 G 14 80°F 82°F1018.7 hPa

Wind History for Isabel Segunda, Vieques Island, PR
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Airport Reports
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Tide / Current Tables for Vieques Island, Puerto Rico
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Vieques Island
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Thu -- 06:02 AM AST     Sunrise
Thu -- 09:03 AM AST     Moonrise
Thu -- 02:51 PM AST     -0.12 feet Low Tide
Thu -- 06:39 PM AST     Sunset
Thu -- 10:24 PM AST     Moonset
Thu -- 11:55 PM AST     0.79 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.70.70.60.60.50.50.50.40.40.30.20.1-0-0.1-0.1-0.1-00.10.30.40.60.70.8

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
Click for Map
Thu -- 01:03 AM AST     0.85 knots Max Flood
Thu -- 04:15 AM AST     -0.00 knots Slack
Thu -- 06:02 AM AST     Sunrise
Thu -- 07:44 AM AST     -0.97 knots Max Ebb
Thu -- 09:04 AM AST     Moonrise
Thu -- 11:25 AM AST     0.00 knots Slack
Thu -- 02:04 PM AST     0.55 knots Max Flood
Thu -- 04:56 PM AST     -0.00 knots Slack
Thu -- 06:40 PM AST     Sunset
Thu -- 07:44 PM AST     -0.53 knots Max Ebb
Thu -- 10:24 PM AST     0.00 knots Slack
Thu -- 10:25 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.80.80.50.1-0.3-0.7-0.9-1-0.8-0.5-0.20.20.50.50.50.3-0-0.3-0.5-0.5-0.4-0.10.2

Weather Map and Satellite Images
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wmap_A
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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (5,6,7,8)
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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.