Saturday, November17, 2018 L-36.com


Marine Weather and Tides
Isabela, PR

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:35AMSunset 5:51PM Saturday November 17, 2018 7:10 AM AST (11:10 UTC) Moonrise 2:17PMMoonset 1:29AM Illumination 70% Phase: Waxing Gibbous; Moon at 9 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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AMZ742 Coastal Waters Of Northwestern Puerto Rico Out 10 Nm- 422 Am Ast Sat Nov 17 2018
Today..Northeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northeast swell around 4 feet in the afternoon.
Tonight..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Isolated showers.
Sunday..Northeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northeast swell around 4 feet.
Sunday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northeast swell around 4 feet.
Monday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Scattered showers.
Tuesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. North swell around 4 feet. Scattered showers.
Wednesday..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
AMZ700 422 Am Ast Sat Nov 17 2018
Synopsis for puerto rico and the uS. Virgin islands waters... Surface high pressure over the central atlantic will continue to promote a moderate to fresh trade wind flow during the next few days. The wind surge will diminish today and moisture is expected to decrease considerably with less shower activity than yesterday. The brisk trade winds will maintain choppy seas through the weekend.


7 Day Forecast for Marine Location Near Isabela, PR
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location: 18.5, -67.01     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 170907
afdsju
area forecast discussion
national weather service san juan pr
507 am ast Sat nov 17 2018

Synopsis Diminishing moisture will produce less shower activity
today, but some showers are still indicated. Showers and possible
thunderstorms will return Tuesday night and Wednesday with the
next band of better moisture, although some 700 mb moisture will
be present. Shower activity will persist through the end of next
week as a cold front approaches late next week.

Short term Today through Monday...

a somewhat settled weather pattern is progged through the short-term
period with scattered showers across the eastern areas of puerto
rico during the morning, then showers over portions of the western
areas during the afternoon.

A drier weather pattern is expected to prevail through Monday. This
is a result of drier air in the mid to upper-levels of the
atmosphere as well as the 850 mb level. This air will move in
from the east later this morning and through the afternoon. The
gfs shows 850 mb to 700 mb relative humidities ranging from 20 to
40 percent. These values are 2 standard deviations below
november's climatology for san juan puerto rico.

Sunday afternoon low-level moisture will increase over the western
areas of the islands, then another patch of drier air is progged to
rapidly filter in again out of the east. This patch of drier air
will drop relative humidities values to the 25th percentile.

Therefore, showers will be limited again across the area.

A strong ridge of high pressure will maintain it's hold across the
central atlantic waters and promote a moderate to fresh easterly
wind flow across the area. At the upper-levels, a weak trough
remains to the northeast of puerto. This feature will not have
much of an effect on the local weather. Therefore, the short-term
forecast is predicated on the drier air and patches of moisture
that are forecast to move in from the east.

Long term Tuesday through Saturday...

high pressure will continue in the west central sub-tropical
atlantic. Higher pressure will begin to build into the western
atlantic out of the northeastern united states Friday night and
Saturday of next week. Upper level high pressure will dominate the
weather pattern until Friday and Saturday when a long wave trough
will approach the area. An area of low level moisture will move
into puerto rico and the u.S. Virgin islands from the east
northeast and bring a weak wind surge. This will increase the
showers across the area on Tuesday night and Wednesday. This
showery pattern will continue on and off through the period as
patches of moisture move through. On Friday winds in the lower
levels become nearly calm as a col at the end of an approaching
frontal zone moves into the area. This will increase rain chances
but should keep the best rains over the interior of the island
Friday and Saturday. Due to the shallow nature of the best
moisture rain fall amounts will be light to moderate, though the
lack of good steering winds could leave some heavy showers in one
place for an extended period of time during Friday and Saturday
afternoons and might provoke an episode of local urban and small
stream flooding.

Aviation Vfr conds are expected to prevail through the reminder
of the TAF period. Iso shra tsra will develop across terminals
tjmz and tjbq by 17 15z before clearing out by 18 00z. Sfc winds
out of the east to southeast at 10 to 15 kts with higher gust up
to 25 kts. Maximum winds ese 25 kt at fl150 and nnw-n 25 kt btwn
fl350-410.

Marine Winds from a passing wind surge have kept seas riled and
seas in the outer atlantic are still running 6 to 8 feet.

Elsewhere in unprotected waters seas are running 5 to 7 feet.

Although seas of at least 7 feet will persist in the northeast
corner of the outer atlantic waters through Wednesday, seas in
the other waters should come down overnight tonight.

Preliminary point temps pops
Sju 87 76 87 76 30 30 20 20
stt 86 77 86 77 30 30 30 30

Sju watches warnings advisories
Pr... High rip current risk through Sunday afternoon for north central-
northeast-northwest-san juan and vicinity-southeast-western
interior.

High rip current risk through late tonight for culebra.

Vi... High rip current risk through this afternoon for st croix.

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

Small craft advisory until 2 pm ast this afternoon for coastal
waters of northern usvi and culebra out 10 nm-coastal
waters of southern usvi vieques and eastern puerto rico out
10 nm.

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

Small craft advisory until 8 pm ast this evening for mona
passage southward to 17n.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PTRP4 16 mi25 min E 4.1 G 6 75°F
AROP4 - 9757809 - Arecibo, PR 16 mi40 min SSE 4.1 G 5.1
41115 - Rincon, Puerto Rico (181) 17 mi40 min 83°F3 ft
MGZP4 - 9759394 - Mayaguez, PR 21 mi46 min 75°F 83°F1014.8 hPa
MGIP4 - 9759110 - Magueyes Islands, PR 37 mi40 min ENE 1 G 2.9 76°F 82°F1015 hPa
SJNP4 - 9755371 - San Juan, PR 47 mi46 min E 5.1 G 7 78°F 82°F1015.5 hPa
41053 - San Juan, PR 48 mi40 min ESE 7.8 G 12 80°F 1014.6 hPa

Wind History for Arecibo, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Aquadilla, Rafael Hernandez Airport, PR6 mi4.3 hrsN 010.00 miPartly Cloudy73°F0°F%1014.6 hPa

Wind History from JBQ (wind in knots)
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Last 24hrE3E4E10
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E12E10SE5SW4CalmCalmNE3--E4--CalmCalmCalmCalmCalm------SE4
1 day agoE6E10E12SE9E10E13E11S10
G15
CalmCalmSE3SE7E6E8------------------SE4
2 days agoE3SE4NW3NE5E5E3NE6SE9E6SE3E6E5SE3E5E6CalmSE5SE3----------E6

Tide / Current Tables for Mayaguez, Puerto Rico
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Mayaguez
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Sat -- 01:30 AM AST     Moonset
Sat -- 03:38 AM AST     1.14 feet High Tide
Sat -- 06:35 AM AST     Sunrise
Sat -- 09:29 AM AST     0.55 feet Low Tide
Sat -- 02:17 PM AST     Moonrise
Sat -- 03:50 PM AST     1.46 feet High Tide
Sat -- 05:51 PM AST     Sunset
Sat -- 10:36 PM AST     0.45 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.911.11.11.10.90.80.60.60.60.70.81.11.31.41.51.41.210.80.60.50.5

Tide / Current Tables for Puerto Real, Puerto Rico
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Puerto Real
Click for Map
Sat -- 01:30 AM AST     Moonset
Sat -- 03:36 AM AST     0.83 feet High Tide
Sat -- 06:35 AM AST     Sunrise
Sat -- 09:24 AM AST     0.40 feet Low Tide
Sat -- 02:17 PM AST     Moonrise
Sat -- 03:47 PM AST     1.06 feet High Tide
Sat -- 05:51 PM AST     Sunset
Sat -- 10:31 PM AST     0.32 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.60.70.80.80.80.70.60.50.40.40.50.60.80.911.110.90.70.60.40.30.3

Weather Map and Satellite Images
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GOES Local Image of    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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Wind Forecast for (6,6,7,8)
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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.