Monday, November20, 2017 L-36.com


Marine Weather and Tides
Naranjito, 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 6:33AMSunset 5:47PM Monday November 20, 2017 1:59 AM AST (05:59 UTC) Moonrise 8:13AMMoonset 7:41PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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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AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 944 Pm Ast Sun Nov 19 2017
Rest of tonight..Southeast winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. North swell around 4 feet. Isolated showers.
Monday..Southeast winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. North swell around 4 feet. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Monday night..Southeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 9 seconds. Northeast swell around 4 feet in the evening. 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. Isolated showers.
Tuesday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
Wednesday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
Thursday..East winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 9 seconds. Isolated showers.
Friday..Southeast winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
AMZ700 944 Pm Ast Sun Nov 19 2017
Synopsis for puerto rico and the uS. Virgin islands waters... A shear line and associated moisture will continue to linger across the local atlantic waters tonight through Monday. This will result in periods of showers and Thunderstorms. Easterly winds and a more stable air mass are expected across the local waters on Tuesday.

7 Day Forecast for Marine Location Near Naranjito, PR
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location: 18.31, -66.18     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 200157 aaa
afdsju
area forecast discussion... Updated
national weather service san juan pr
957 pm ast Sun nov 19 2017

Update The rain from the shear line is moving off the north
coast of puerto rico much as the hiresnmm had forecast. The next
day, Monday's forecast, show less coverage but still good showers
to form in southeasterly flow off of EL yunque and into san juan
and also over northwest puerto rico and even the northern u.S.

Virgin islands. Although exact location of showers cannot be
determined, probabilities are good for this scenario. Precipitable
water will fall but not very much tomorrow, compared with Tuesday
and an axis of divergence aloft will be across western puerto rico
and over the u.S. Virgin islands. No changes have been made to the
short or long term synoptic reasoning or grids.

Aviation Vfr conds returning as per previous discussion.

Marine No changes from previous discussion.

Prev discussion issued 455 pm ast Sun nov 19 2017
synopsis... A shear line across puerto rico and north of the u.S.

Virgin islands will be taken northwest a short distance by
several high pressures invading the western atlantic. As mid-level
high pressure forms just north of the area on Wednesday, moisture,
clouds and showers will return to the area Wednesday through
Saturday.

Short term... Tonight through Tuesday...

goes 16 satellite imagery shows an area of disturbed weather to
the southwest of puerto rico that is moving off to the northeast
and has brought heavy rain, frequent lightning and flooding to
portions of puerto rico. Currently the shear line is positioned
across northwest puerto rico with converging southerly winds
ahead of the boundary. Although stability will increase this
evening, light to moderate rain will continue, diminishing, and
some inundation of low-lying and poorly drained areas will
continue.

Although moisture begins to decrease in the mid-levels tonight,
lingering low-level moisture will drive another round of showers
and thunderstorms during the day Monday. Tuesday the trough of
low pressure will begin to pull away from the forecast area and
allow an upper level ridge of high pressure to nose in over the
region. This ridge will give the islands a brief reprieve from the
heavy rainfall by limiting the influx of deep tropical moisture
across puerto rico and the u.S. Virgin islands. The GFS is showing
a line of drier air at 700 mb coinciding with a ridge of high
pressure that extenuates from the tropical atlantic into the
caribbean and then northwest across puerto rico. Model data is
showing precipitable water values falling to between 1.25 to 1.50
inches which is in the 25th percentile. This in contrast with
values that were in the 75th percentile the last four days.

Long term... Wednesday through Sunday
moisture begins to return around a mid level high pressure
Wednesday and coupled with an approaching trough from the east,
winds will turn somewhat northeasterly. Although a mid to upper
level ridge will hold across the forecast area much of the
forecast period, these easterly winds will continue to bring
patches of low level moisture across the local isles to keep the
chance of passing showers each day. Therefore, expect a seasonable
weather pattern with passing showers across u.S. Virgin islands and
eastern puerto rico as well as limited shower activity across
western puerto rico Wednesday through Saturday. The upper
level ridge will begin to erode during the upcoming weekend and
lower levels clouds will allow some more Sun and hence the
possibility of increasing thunderstorms in interior and western
puerto rico.

Aviation...

aviation... Shra and diminishing tsra expected to continue across
the local area thru 20 02z, causing vcsh vcts across the
terminals with tempo MVFR conds possible at tjbq and tjmz thru
20 02z.VFR conds to continue thru 20 15z with CIGS blo fl120 and
mtn obscurations. Southerly winds sfc to fl200 gradly shifting to
se 10 to 20 kt by 20 18z. Maximum winds wsw 30 kt around fl400
thru 20 18z.

Marine... Seas 3 to 5 feet possibly 6 in the outer atlantic waters
by Wednesday. Seas somewhat lower in the caribbean. Small craft
advisory conditions not expected during the next 7 days in the
forecast area, but 7 foot seas possible north of the area by
Tuesday.

Preliminary point temps pops
Sju 77 85 78 86 30 50 20 30
stt 80 82 80 82 40 40 20 30

Sju watches warnings advisories
Pr... Flash flood watch through Monday afternoon for northwest-western
interior.

Vi... None.

Am... None.

Short term... Ws
long term... .Ws


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 11 mi41 min 83°F1011.4 hPa
41053 - San Juan, PR 12 mi59 min SSE 7.8 G 12 79°F 83°F4 ft1010.5 hPa (-0.5)
YABP4 - 9754228 - Yabucoa Harbor, PR 25 mi41 min 76°F
AROP4 - 9757809 - Arecibo, PR 30 mi41 min S 1.9 G 1.9
42085 - Southeast of Ponce, PR 36 mi59 min NE 9.7 G 12 84°F 83°F1010.4 hPa (+0.0)
41056 38 mi59 min SE 9.7 G 12 80°F 4 ft1011.6 hPa (-0.0)
CLBP4 - 9752235 - Culebra, PR 47 mi41 min 79°F 83°F1011.8 hPa

Wind History for San Juan, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR13 mi63 minESE 310.00 miA Few Clouds77°F77°F100%1010.3 hPa

Wind History from JSJ (wind in knots)
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Last 24hrCalmSW3CalmSW3CalmSE3Calm3CalmNE7NE8NE9CalmNW3CalmSW6SE3CalmCalmSE4SE3SE4S3E3
1 day agoCalmSW5S3CalmCalmCalmCalmCalmSE3E4E4SE3S5CalmN9NE7S10CalmCalmCalmCalmCalmSE3SE4
2 days agoSE3SE3CalmCalmCalmS3SE4S4S4SE7SE10S9
G17
S11
G17
S8S8S3S5S4S4S3S34S3S4

Tide / Current Tables for San Juan, La Puntilla, San Juan Bay, Puerto Rico
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San Juan
Click for Map
Mon -- 03:18 AM AST     0.05 feet Low Tide
Mon -- 06:33 AM AST     Sunrise
Mon -- 08:12 AM AST     Moonrise
Mon -- 10:32 AM AST     1.76 feet High Tide
Mon -- 05:14 PM AST     0.51 feet Low Tide
Mon -- 05:46 PM AST     Sunset
Mon -- 07:40 PM AST     Moonset
Mon -- 09:53 PM AST     0.93 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.40.20.10.10.30.60.91.31.61.71.71.61.41.10.80.60.50.50.60.80.90.90.9

Tide / Current Tables for San Juan, Puerto Rico
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San Juan
Click for Map
Mon -- 03:18 AM AST     0.06 feet Low Tide
Mon -- 06:33 AM AST     Sunrise
Mon -- 08:12 AM AST     Moonrise
Mon -- 10:31 AM AST     1.76 feet High Tide
Mon -- 05:13 PM AST     0.53 feet Low Tide
Mon -- 05:46 PM AST     Sunset
Mon -- 07:40 PM AST     Moonset
Mon -- 09:52 PM AST     0.94 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.40.20.10.10.30.60.91.31.61.71.71.61.41.10.80.60.50.60.70.80.90.90.9

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 (0,6,7,8)
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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.