Sunday, August20, 2017 L-36.com


Marine Weather and Tides
Culebra, PR

Version 3.4
What's New / NOTES
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.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:01AMSunset 6:43PM Sunday August 20, 2017 3:43 AM AST (07:43 UTC) Moonrise 4:45AMMoonset 5:57PM Illumination 4% Phase: Waning Crescent; Moon at 28 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- 833 Pm Ast Sat Aug 19 2017
.small craft should exercise caution...
Rest of 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.
Sunday..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Sunday night..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Isolated Thunderstorms in the evening. Scattered showers through the night.
Monday..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers.
Monday 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.
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.
Wednesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Thursday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Scattered showers.
AMZ700 833 Pm Ast Sat Aug 19 2017
Synopsis for puerto rico and the uS. Virgin islands waters... Tropical depression harvey will continue to exit the eastern caribbean tonight. Hazardous seas will continue but will gradually subside across the caribbean waters and local passages overnight. However, hazardous seas will continue across the offshore atlantic waters through Monday, as an area of low pressure northeast of the leeward islands is forecast to move north of the forecast area.

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 200032
afdsju
area forecast discussion
national weather service san juan pr
832 pm ast Sat aug 19 2017

Update Doppler radar detected scattered to numerous showers
and isolated thunderstorms along and north of cordillera central,
across southeastern sections of puerto rico as well as across the
surrounding coastal waters this afternoon. Several flood
advisories and special weather statement were issued for
municipalities across those sectors of the island. Several marine
weather statements were also issued due to frequent lightnings
across the surrounding waters. For tomorrow, an area of low
pressure, invest 92l, is expected to pass mainly north of the
local area. However the moisture provided by this system in
occasional seas up to 5 feet. Dominant period 7 seconds. Isolated
combinations with daytime heating and local effects will aid in
the development of shower and thunderstorm activity across
central interior and western sections of puerto rico during the
afternoon. Scattered showers and a couple of thunderstorms are
also expected to affect vieques, culebra and the u.S. Virgin
islands.

Aviation MostlyVFR conditions are expected overnight across
the local flying area. However, brief periods of shra will affect
the leewards, usvi and tjsj TAF sites. Winds from the ese are
expected to decrease at 10-15 knots after 19 23z, increasing again
at 15-20 knots with higher gusts after 20 13z. Periods of MVFR
conditions with mountain obscurations are expected across tjbq
and tjmz from 20 16z through 20 22z in shra tsra.

Marine Tropical depression harvey will continue to move
westward and away from the forecast area tonight. This will
continue to result in hazardous seas of 6 to 8 feet and winds up
to 20 knots particularly across the caribbean waters and local
passages. Hazardous seas will continue to prevail across the
offshore atlantic waters through Monday as an area of low pressure
east northeast of the leeward islands moves to the northeast of
the forecast area.

Prev discussion issued 531 pm ast Sat aug 19 2017
synopsis... Doppler radar and satellite images continued to
depict areas and clusters of showers thunderstorms on the
periphery of what is now tropical depression harvey, propagating
northwards across the forecast area. This added moisture along
with good forcing and unstable conditions aloft aided in the
development of scattered to numerous showers and isolated
thunderstorms across the islands and coastal waters especially
over and around puerto rico. Expect this trend to continue through
at least the early evening hours, with a gradual diminishing of
the convective activity over much of the land areas by late
evening.

Short term... Overnight though Monday... Showers and thunderstorm
activity across the region should continue to diminish over land
areas and the coastal waters by late evening, as the recently
downgraded tropical depression harvey will move farther westward
into the central caribbean waters. The trade winds are then expected
to become more east to southeast but will continue to transport an
elongated plume of low level moisture across the region, as another
tropical wave area of low pressure lifts northwards and just northeast
of the region. This additional moisture and accompanying shower activity
will reach parts of the north and east sections of the islands during
the early morning hours on Sunday. For the rest of the day on Sunday,
expect good moisture convergence, in combination with daytime heating
and local effects, as well as the marginal instability aloft to support
periods of scattered to numerous showers with isolated thunderstorms
during the afternoon. The activity should be focused mainly across the
cordillera central and northwest sections of puerto rico including
parts of the san juan metro area. By Monday afternoon, at this time,
showers and thunderstorms are expected to develop mainly north of the
cordillera central of puerto rico with only quick passing streamer like
shower activity expected elsewhere.

Long term... Tuesday through Sunday... As moisture associated with
area of low pressure invest 92l moves away, a drier air mass in expected
to encompass the forecast area on Tuesday. This drier air mass is expected
to be short-lived as a mid to upper level trough is forecast to establish
just north of the forecast area. This along with available moisture
will enhance convective development across the region Wednesday through
Thursday. By Friday and into the upcoming weekend, a mid level ridge
is then expected to build across the central atlantic and into the
northeast caribbean to result once again in moisture erosion and stable
conditions across the region. Therefore a more seasonal weather pattern
is expected to prevail with locally induced showers and thunderstorms
each day.

Aviation... MostlyVFR conditions are expected overnight across the
local flying area. However, brief periods of shra will affect the
leewards, usvi and tjsj TAF sites. Winds from the ese are expected
to decrease at 10-15 knots after 19 23z, increasing again at 15-20
knots with higher gusts after 20 13z. Periods of MVFR conditions
with mountain obscurations are expected across tjbq and tjmz from
20 16z through 20 22z in shra tsra.

Marine... Recently downgraded tropical depression harvey will
continue to move westward and exit the eastern caribbean waters
later tonight. However expected hazardous seas between 6 to 8 feet
and winds between 15 to 20 particularly across the caribbean waters
and local passages. Hazardous seas will continue to prevail across
the offshore atlantic waters through Monday as an area of low pressure
east northeast of the leeward islands moves to the northeast of the
forecast area.

Preliminary point temps pops
Sju 79 90 80 89 40 60 40 30
stt 81 88 81 90 50 50 50 40

Sju watches warnings advisories
Pr... High rip current risk until 6 am ast Sunday for central interior-
north central-northeast-northwest-southeast-southwest-
western interior.

Vi... None.

Am... High rip current risk until 6 am ast Sunday for coastal waters
of southwestern puerto rico out 10 nm-coastal waters of
southern puerto rico out 10 nm.

Small craft advisory until 2 am ast Sunday for caribbean waters
of puerto rico from 10 nm to 17n-mona passage southward to
17n.

Small craft advisory until 2 pm ast Monday for atlantic waters
of puerto rico and usvi from 10 nm to 19.5n.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41052 - South of St. John, Virgin Islands 17 mi43 min ESE 12 G 14 85°F 85°F3 ft1010.5 hPa (-1.0)
CHSV3 - 9751364 - Christiansted Harbor, Virgin Islands 19 mi43 min E 2.9 G 5.1 81°F 85°F1011.8 hPa (-1.3)
LAMV3 21 mi43 min 82°F 85°F
LTBV3 - 9751401 - Lime Tree Bay, VI 23 mi43 min SE 4.1 G 8 83°F 85°F1012.6 hPa (-1.3)
CHAV3 - 9751639 - Charlotte Amalie, VI 25 mi43 min Calm G 1.9 81°F 85°F
CLBP4 - 9752235 - Culebra, PR 39 mi43 min 82°F 85°F1012.1 hPa (-1.0)
41058 41 mi43 min ESE 9.7 G 12 83°F 85°F4 ft
VQSP4 - 9752619 - Isabel Segunda, Vieques, PR 42 mi43 min Calm G 1 79°F
ESPP4 - 9752695 - Esperanza, PR 43 mi43 min NE 1.9 G 2.9 78°F 85°F1011.9 hPa (-1.3)
41056 45 mi43 min E 9.7 G 14 83°F 3 ft1011.9 hPa (-1.1)

Wind History for Christiansted Harbor, St Croix, VI
(wind in knots)    EDIT      (on/off)   Help
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Last
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E6
G14
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G12
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E6
G10
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G9
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G12
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G11
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G15
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G12
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G17
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G18
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G16
E7
G14
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SE4
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G13
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G16
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G9
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G11
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SE7
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G9
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G11
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G6
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G10
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G11
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G15
E5
G11

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR76 mi1.8 hrsN 010.00 miPartly Cloudy80°F77°F90%1011.9 hPa

Wind History from JSJ (wind in knots)
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Last 24hrE10E11E21
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G24
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G23
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E6E10E8NE12CalmE3E7CalmE6CalmSE3
1 day agoSE3E3SE4SE5SE5E11E18
G23
E15E15E16
G22
E16
G22
NE15E14
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G20
E11E10E15E12E14E12E13E11E11E12
2 days agoE8E6S4E9
G18
E12
G20
SE7E7SE6SE9
G19
SE6SE7E10
G14
E13E10E9E7SE4E3E3SE4CalmS3E7Calm

Tide / Current Tables for Christiansted Harbor, St Croix, Virgin Islands
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Christiansted Harbor
Click for Map
Sun -- 04:45 AM AST     Moonrise
Sun -- 06:02 AM AST     Sunrise
Sun -- 11:55 AM AST     -0.11 feet Low Tide
Sun -- 05:56 PM AST     Moonset
Sun -- 06:41 PM AST     Sunset
Sun -- 08:40 PM AST     0.77 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.60.50.50.40.40.30.20.10-0-0.1-0.1-0.100.20.30.50.60.70.80.80.70.7

Tide / Current Tables for Benner Bay, St. Thomas, Virgin Islands
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Benner Bay
Click for Map
Sun -- 04:45 AM AST     Moonrise
Sun -- 06:02 AM AST     Sunrise
Sun -- 12:42 PM AST     -0.11 feet Low Tide
Sun -- 05:57 PM AST     Moonset
Sun -- 06:42 PM AST     Sunset
Sun -- 09:03 PM AST     0.88 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.50.40.40.30.30.30.30.20.10-0-0.1-0.1-0.10.10.20.40.60.70.80.90.90.8

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
carb_satellite

GOES Local Image of Puerto Rico    EDIT
Geos

Wind Forecast for (3,6,7,8)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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weather_mapweather_map weather_map

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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.