Saturday, November17, 2018 L-36.com


Marine Weather and Tides
Jobos, 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 6:30AMSunset 5:48PM Saturday November 17, 2018 3:21 PM AST (19:21 UTC) Moonrise 2:13PMMoonset 1:26AM Illumination 73% Phase: Waxing Gibbous; Moon at 10 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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AMZ735 Coastal Waters Of Southern Puerto Rico Out 10 Nm- 1017 Am Ast Sat Nov 17 2018
.small craft should exercise caution...
Rest of today..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Tonight..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Sunday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers.
Sunday night..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Monday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Tuesday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Wednesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
AMZ700 1017 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 Jobos, PR
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location: 17.93, -66.16     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 171552
afdsju
area forecast discussion
national weather service san juan pr
1152 am ast Sat nov 17 2018

Update
Sunny skies are expected to prevailed across most of the islands
through the rest of today. Meanwhile, mimic tpw depicted a surge
of moisture moving into the region which is being pushed by the
trade winds. This surge will increase showers mainly across the
caribbean offshore waters. But, a few of them could reach st
croix, the east and southeast coast of puerto rico at times later
this afternoon into the evening. In addition, diurnal heating and
local effects could aid in the development of showers across the
northwest quadrant of puerto rico. At this time, thunderstorm
activity is not likely.

Although there is a ridge pattern in place, and little or no
shower activity is expected overnight, trade wind showers
could reach the windward sections of st croix, and east-south pr
at times. Shower activity is expected to increase across the u.S.

Virgin islands and the eastern third of pr by Sunday morning.

Aviation
Vfr conditions are expected to prevail. Clouds formation is
posible across the interior sections of pr and downwind from the
u.S. Virgin islands between 17 17-22z. Some -shra shra could
impact tjmz tjbq tist tisx during that time. Winds will continue
from the east to east southeast at 10 to 15 knots with higher
gusts and sea breeze variations.

Marine
Seas will improve across the atlantic coastal waters through this
evening. Small craft advisories are in effect for most of the
local waters except across the west and south coastal waters. No
change was made to the previous forecast.

Prev discussion issued 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 20 20 20 20
stt 86 77 86 77 20 50 50 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 until 6 pm ast this evening for st croix.

Small craft advisory until 2 pm ast this afternoon for
st.Thomas... St. John... And adjacent islands.

Am... High rip current risk through Sunday afternoon for coastal
waters of northern puerto rico out 10 nm.

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... Cam
aviation... Cam


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
JOXP4 - Jobos Bay Reserve, Puerto Rico 4 mi97 min E 9.9 1016 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 19 mi34 min 87°F 73°F
42085 - Southeast of Ponce, PR 20 mi82 min E 18 G 21 85°F 83°F4 ft1012.9 hPa (-2.6)
SJNP4 - 9755371 - San Juan, PR 37 mi40 min ENE 17 G 19 83°F 83°F1014.2 hPa
ESPP4 - 9752695 - Esperanza, PR 38 mi40 min ESE 9.9 G 14 83°F 82°F1014 hPa
41053 - San Juan, PR 38 mi52 min E 14 G 18 83°F 1013.4 hPa
41056 43 mi52 min E 12 G 16 82°F 1013.6 hPa
MGIP4 - 9759110 - Magueyes Islands, PR 47 mi34 min SSE 4.1 G 11 86°F 83°F1013.8 hPa
AROP4 - 9757809 - Arecibo, PR 48 mi34 min ENE 8.9 G 15

Wind History for Yabucoa Harbor, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from JPS (wind in knots)
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Last 24hr--------------------------------------E5NE5NE5--Calm
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Tide / Current Tables for Arroyo, Puerto Rico
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Arroyo
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Sat -- 01:26 AM AST     Moonset
Sat -- 05:52 AM AST     0.63 feet High Tide
Sat -- 06:31 AM AST     Sunrise
Sat -- 07:09 AM AST     0.39 feet Low Tide
Sat -- 02:13 PM AST     Moonrise
Sat -- 05:47 PM AST     Sunset
Sat -- 06:58 PM AST     0.81 feet High Tide
Sat -- 09:07 PM AST     0.46 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.60.60.60.60.60.60.40.40.40.40.50.50.60.60.70.70.80.80.80.60.50.50.5

Tide / Current Tables for Puerto Maunabo, Puerto Rico
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Puerto Maunabo
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Sat -- 01:25 AM AST     Moonset
Sat -- 04:04 AM AST     0.56 feet High Tide
Sat -- 06:30 AM AST     Sunrise
Sat -- 08:09 AM AST     0.34 feet Low Tide
Sat -- 02:12 PM AST     Moonrise
Sat -- 05:10 PM AST     0.71 feet High Tide
Sat -- 05:46 PM AST     Sunset
Sat -- 10:07 PM AST     0.41 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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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 (14,3,4,5)
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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.