Monday, June26, 2017 L-36.com


Marine Weather and Tides
Las Croabas, 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 5:47AMSunset 7:03PM Monday June 26, 2017 3:00 PM AST (19:00 UTC) Moonrise 8:23AMMoonset 9:36PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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- 1205 Pm Ast Mon Jun 26 2017
Rest of today..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Tonight..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..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Tuesday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Wednesday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Thursday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Scattered showers. Isolated Thunderstorms.
Friday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. East swell around 4 feet. Isolated Thunderstorms. Scattered showers.
AMZ700 1205 Pm Ast Mon Jun 26 2017
Synopsis for puerto rico and the uS. Virgin islands waters... Surface high pressure across the central atlantic will maintain a moderate to locally fresh easterly wind flow across the regional waters much of this week.

7 Day Forecast for Marine Location Near Las Croabas, PR
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location: 18.34, -65.57     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 261609
afdsju
area forecast discussion
national weather service san juan pr
1209 pm ast Mon jun 26 2017

Update Dry and stable air mass has prevailed across the local
islands this morning as the tropical wave that affected us during
the overnight hours moved over the central caribbean. Saharan dust
has moved over the region... Limiting somewhat the visibilities
across the local islands. Some diurnal induced showers are still
possible over western pr due to the combination of the available
moisture and local effects. However... No significant rainfall
accumulations are anticipated with this activity. This hazy and
stable conditions will prevail through at least midweek. Minor
changes were introduced to the forecast package this morning.

Aviation Vfr conds expected at all TAF sites except tjbq tjmz
where brief MVFR conds are possible between 18z-22z. Easterly
winds of 15-20 kts will prevail thru forecast period.

Marine Typical marine conditions will prevail through at least
midweek. Mariners can expect seas of 3-5 ft and winds of 10-20 kts
across most waters. Locally fresh winds may create choppy seas along
the coastal waters north and south puerto rico between 15z-21z.

Prev discussion issued 414 am ast Mon jun 26 2017
synopsis... A tropical wave located over the mona passage will
continue to move west and away from the local area through mid
morning. A high pressure will quickly build behind this tropical
wave bringing a drier and more stable air mass across the region.

This feature will prevail over the local area through at least
Thursday.

Short term... Today through Wednesday...

showers and thunderstorms affected puerto rico and the u.S. Virgin
islands overnight. An area of showers and thunderstorms moved across
the eastern third of puerto rico and the u.S. Virgin islands around
10 pm, with rainfall accumulation up to one inch in localized areas.

This area moved rapidly westward and by midnight, most of the
islands were rain free. Early this morning, a line of moderate to
heavy showers affected the eastern section of puerto rico. This
activity is associated with a fast moving tropical wave, which will
continue to produce isolated to scattered showers and possible
thunderstorms across the region through mid morning. By this
afternoon, the wave is expected to exit the local area. However,
lingering moisture associated with the wave will combine with
daytime heating and local effects to produce scattered showers with
isolated thunderstorms this afternoon across the western interior
and northwest sections of puerto rico.

For tonight into Tuesday, a very dry airmass with saharan dust will
encompass the region. As a result, hazy conditions are expected with
limited shower activity. For Wednesday, this weather pattern will
continue across the local islands.

Long term... Wednesday through Tuesday. Overall dry and somewhat
hazy conditions are expected to prevail across the islands at
least through Thursday, with shower and thunderstorm development
limited to mainly across the west sections of puerto rico during
the afternoons hours. Elsewhere, mostly fair weather skies and
somewhat hazy conditions should prevail.

An area of increasing moisture associated to a low level
disturbance is expected to reach our local forecast area on
Thursday. Therefore expect isolated to locally scattered showers
affecting the local islands and eastern portions of puerto rico
during the overnight and morning hours and then showers and
thunderstorms development mainly across the western portions of
puerto rico during the afternoon hours. Some of this activity
will also be enhanced due to the proximity of a developing tutt
low Thursday through Friday.

Aviation...VFR conditions will prevail across all TAF sites through
26 16z. Brief periods of MVFR conditions can be expected across tjmz
and tjbq from 26 16z through 26 22z in shra tsra. Hazy skies are
expected across most TAF sites this afternoon but visibilities will
remain p6sm. Low level winds will be mainly east southeast at 10 to
15 kts.

Marine... Increasing seas and choppy seas have developed across
the local waters during the overnight hours. This is due to the
passing of a tropical wave through the overnight hours. This
feature is now located over the mona passage. Small craft
operators should exercise caution due to winds and choppy seas.

Preliminary point temps pops
Sju 89 79 90 78 20 10 20 20
stt 89 79 90 78 20 20 20 20

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Er


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FRDP4 - 9753216 - Fajardo, PR 3 mi42 min E 11 G 13 85°F 76°F
41056 8 mi60 min E 14 G 16 83°F 83°F4 ft1016.5 hPa
CLBP4 - 9752235 - Culebra, PR 14 mi42 min 85°F 84°F1016.3 hPa
VQSP4 - 9752619 - Isabel Segunda, Vieques, PR 15 mi42 min E 7 G 11 86°F
ESPP4 - 9752695 - Esperanza, PR 18 mi42 min ESE 11 G 18 84°F 84°F1016.2 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 24 mi42 min ENE 8.9 G 13 87°F
SJNP4 - 9755371 - San Juan, PR 30 mi42 min E 17 G 21
41053 - San Juan, PR 30 mi60 min E 14 G 19 83°F 82°F4 ft1015.9 hPa (-1.2)
CHAV3 - 9751639 - Charlotte Amalie, VI 34 mi42 min ENE 8 G 14 87°F 84°F
41052 - South of St. John, Virgin Islands 43 mi60 min E 14 G 18 84°F 83°F5 ft1015.2 hPa (-1.2)
JOXP4 - Jobos Bay Reserve, Puerto Rico 44 mi75 min E 8.9 87°F 1017 hPa75°F
LAMV3 45 mi42 min 84°F 86°F

Wind History for Fajardo, PR
(wind in knots)    EDIT      (on/off)   Help
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NE8

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR24 mi64 minENE 189.00 miPartly Cloudy and Breezy86°F75°F72%1016.6 hPa

Wind History from JSJ (wind in knots)
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Last 24hrE17E14E13E15E15E11E11SE8
G18
NE3CalmSW3CalmCalmS3SE5E7E8E11E14E16E16
G21
E17
G23
E17NE18
1 day agoE17E17E11E16E14E9E6E7E4E4E5CalmCalmCalmE8E6E5E9E11E14E16
G21
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2 days agoNE14NE12
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E11NE14NE13E12E10E8E6E5SE4SE4E4SE4CalmE5E5E12E8E14
G21
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G29
E8E13
G19
E17
G23

Tide / Current Tables for Playa de Fajardo, Puerto Rico
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Playa de Fajardo
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Mon -- 05:10 AM AST     0.21 feet Low Tide
Mon -- 05:48 AM AST     Sunrise
Mon -- 08:24 AM AST     Moonrise
Mon -- 10:16 AM AST     0.96 feet High Tide
Mon -- 04:17 PM AST     -0.29 feet Low Tide
Mon -- 07:01 PM AST     Sunset
Mon -- 09:35 PM AST     Moonset
Mon -- 11:26 PM AST     1.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.71.410.60.30.20.30.40.70.910.90.70.50.1-0.1-0.3-0.2-00.40.81.31.61.8

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
Click for Map
Mon -- 12:09 AM AST     0.91 knots Max Flood
Mon -- 03:18 AM AST     -0.00 knots Slack
Mon -- 05:48 AM AST     Sunrise
Mon -- 06:49 AM AST     -1.10 knots Max Ebb
Mon -- 08:24 AM AST     Moonrise
Mon -- 10:29 AM AST     0.00 knots Slack
Mon -- 01:16 PM AST     0.69 knots Max Flood
Mon -- 04:18 PM AST     -0.00 knots Slack
Mon -- 07:02 PM AST     Sunset
Mon -- 07:02 PM AST     -0.57 knots Max Ebb
Mon -- 09:35 PM AST     Moonset
Mon -- 09:43 PM AST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.80.60.1-0.3-0.7-1-1.1-1-0.6-0.20.20.50.70.60.40.1-0.2-0.5-0.6-0.5-0.20.10.5

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 (15,3,4,5)
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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.