Tuesday, May22, 2018 L-36.com


Marine Weather and Tides
Culebra, PR

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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.

Sunrise 5:42AMSunset 6:50PM Tuesday May 22, 2018 3:29 PM AST (19:29 UTC) Moonrise 12:48PMMoonset 12:53AM Illumination 55% Phase: First Quarter Moon; Moon at 8 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- 1056 Am Ast Tue May 22 2018
.small craft should exercise caution...
Rest of today..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers.
Tonight..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers.
Wednesday..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers.
Wednesday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Thursday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Friday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Scattered showers.
Saturday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
AMZ700 1056 Am Ast Tue May 22 2018
Synopsis for puerto rico and the uS. Virgin islands waters... A broad surface high pressure ridge spread across the west and central atlantic will continue to yield moderate to fresh easterly winds across the local waters through most of the work week. As a result, seas are forecast to remain choppy at least through Thursday. A weak tropical wave will move west across the caribbean sea today, well to the south of the region.

7 Day Forecast for Marine Location Near Culebra, PR
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location: 18.02, -64.67     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 221522
afdsju
area forecast discussion
national weather service san juan pr
1122 am ast Tue may 22 2018

Update Sunny to partly cloudy skies prevailed across the
islands during the morning hours. By mid morning, streamers were
already developing off the usvi, culebra and vieques, as well from
el yunque mountain. Showers associated to the streamers will
continue to develop and affect portions of the metro area and the
eastern sections of pr during the next 2-3 hours. Also, periods of
heavy downpours are expected across sections of the western
interior and western pr, during the afternoon hours. Urban and
small stream flooding is expected with the heaviest showers. No
change needed to previous forecast.

Aviation MainlyVFR conditions to prevail across all terminals.

However, +shra expected to develop over the interior west pr,
impacting mainly tjmz tjbq. Streamers downing of the islands and
over eastern pr will cause mainly vcsh or -ra across
tist tisx tjsj. Latest 22 12z tjsj upper air sounding indicated
e-ene winds between 10-20 kt blo fl100.

Marine Seas will continue to range between 4-6 feet across the
regional waters and east winds will prevail between 15-20 kt.

Therefore, small crafts should exercise caution. A moderate risk
of rip currents will continue across the east, north and southern
beaches of the islands, except in the northern usvi where the risk
is low.

Prev discussion issued 445 am ast Tue may 22 2018
synopsis... Continue to expect trade wind showers across usvi and
eastern pr as well as locally induced afternoon showers across
western sections of puerto rico each day. Available moisture will
increase Wednesday but weather pattern will remain fairly similar.

The chance for showers and thunderstorms will increase by the end
of the week.

Short term... Today through Thursday...

the overall weather pattern is expected once again to be that of
brief isolated to scattered showers in the morning across the local
waters, usvi, and eastern pr; with showers developing across western
pr in the afternoon. Which is what we have been observing for the
past several days. However, the local winds are not as strong this
week as they were the past weekend, so the afternoon showers across
western pr might last a bit longer before they move offshore and
they also may have a larger coverage area compared to the past
several days. As far as the potential for thunderstorms, the overall
pattern still favors only a slight chance of thunderstorms at best.

Therefore the current forecast will go with persistence and we will
stay mainly with showers and no thunderstorms because the dynamics
for thunderstorm development have not really changed much since we
are still in the subsident side of the upper trough. One slight
difference is that the available moisture is expected to increase on
Wednesday and Thursday, so the cloud cover and shower development
may encompass a larger area of the local islands.

Bottom line is that from today through Thursday, brief showers are
expected in the morning across usvi and eastern pr, then convection
causing heavier showers across western interior and western pr in
the afternoon with scattered showers elsewhere. Wednesday and
Thursday maybe a bit more shower activity due to higher moisture.

Easterly winds with sea breeze variations and fairly seasonable
temperatures are expected. The upper trough is not positioned
favorably for persistent thunderstorm development over the islands,
but numerous showers are expected. Some showers could be heavy at
times, and at the very least, leading to minor flooding in areas of
poor drainage, possible urban flooding in some areas.

Long term... Friday through Wednesday...

a mid to upper level ridge is expected to slowly erode early in the
forecast period as a mid to upper level trough (tutt) develops
across the central atlantic and into the eastern caribbean. At
lower levels, a broad high pressure system anchored across the
central atlantic will yield east southeast winds Friday through
early the next week. There is a tropical wave near 35w which is
expected to be in the vicinity the upcoming weekend.

If forecast holds, expect passing showers across windward areas as
well as locally induced afternoon showers with isolated thunderstorms
over and north of the cordillera central fri-sat. The chance for
showers and thunderstorms (organized convection) will increase
across the forecast area sun-mon as tropical wave interacts with
trough aloft. However, a seasonable weather pattern will quickly
return to the forecast area Tuesday onwards under mid level ridge
pattern. Warm to hot temperatures likely Friday into early the
upcoming weekend under east southeast winds.

Aviation...VFR conds expected through 22 16z across the local
terminals with mainly vcsh across the leewards, usvi, and tjsj
terminals. Shra +shra development across w-pr expected after 22 16z,
likely affecting tjmz and possibly tjbq as well, causing at least
MVFR conds in those terminals, and possible brief ifr at tjmz. Shra
activity subsiding after 22 22z. Winds from the east at around 15kt
with sea breeze variations and occasional gusts.

Marine... Choppy marine conditions will continue to prevail across
most of the offshore waters during the next few with seas 4 to 6
feet. Seas between 3 to 5 feet are expected nearshore. Easterly
winds 15 to 20 knots to continue. Small boat operators should
exercise caution across most of the local waters.

Preliminary point temps pops
Sju 86 77 87 77 40 40 30 20
stt 86 75 87 75 40 40 30 30

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Ds


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHSV3 - 9751364 - Christiansted Harbor, Virgin Islands 19 mi42 min E 8 G 15 82°F 81°F
LAMV3 21 mi42 min 81°F 83°F
LTBV3 - 9751401 - Lime Tree Bay, VI 23 mi42 min SE 9.9 G 16 83°F 83°F1017 hPa
CLBP4 - 9752235 - Culebra, PR 39 mi42 min 87°F 83°F1016.3 hPa

Wind History for Christiansted Harbor, St Croix, VI
(wind in knots)    EDIT      (on/off)   Help
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PM
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Last
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NE7
G15
NE9
G13
NE9
G12
E2
G9
E3
G8
E4
G7
NE4
G10
NE6
G11
NE4
G8
E2
G9
E3
G7
NE6
E3
G7
E3
G6
E3
G8
NE7
G10
NE6
G15
NE9
G14
NE10
G14
NE6
G12
NE6
G10
NE7
G13
NE10
G15
E7
G13
1 day
ago
NE6
G13
NE7
G12
NE7
G14
NE5
G11
NE9
G14
NE5
NE5
G11
NE4
G8
NE3
G8
E3
G10
E3
G6
E2
G5
E3
G6
E3
G7
E2
NE3
G8
NE5
G12
NE8
G13
NE8
G13
NE8
G16
NE11
G17
NE9
G13
NE11
G15
NE5
G11
2 days
ago
E9
G18
E4
G11
NE5
G12
NE6
G11
NE4
G11
E4
G15
E4
G10
E4
G8
E5
G9
E5
G14
E5
G11
E8
G14
E5
G11
NE4
G10
NE4
G11
E7
G10
NE6
G13
NE10
G18
NE9
G18
NE10
G16
NE12
G17
NE9
G15
NE10
G17
NE11
G18

Airport Reports
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Tide / Current Tables for Christiansted Harbor, St Croix, Virgin Islands
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Christiansted Harbor
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Tue -- 12:53 AM AST     Moonset
Tue -- 02:03 AM AST     0.75 feet High Tide
Tue -- 05:44 AM AST     Sunrise
Tue -- 12:48 PM AST     Moonrise
Tue -- 06:18 PM AST     0.14 feet Low Tide
Tue -- 06:46 PM AST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.70.80.70.70.60.60.50.40.30.30.30.30.20.20.20.20.10.10.10.20.20.30.4

Tide / Current Tables for Benner Bay, St. Thomas, Virgin Islands
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Benner Bay
Click for Map
Tue -- 12:54 AM AST     Moonset
Tue -- 03:13 AM AST     0.81 feet High Tide
Tue -- 05:43 AM AST     Sunrise
Tue -- 11:19 AM AST     0.16 feet Low Tide
Tue -- 12:49 PM AST     Moonrise
Tue -- 04:12 PM AST     0.28 feet High Tide
Tue -- 06:48 PM AST     Sunset
Tue -- 08:13 PM AST     0.21 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.70.80.80.80.70.60.50.40.30.20.20.20.20.20.30.30.30.30.20.20.20.30.3

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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (15,3,4,5)
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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.