Monday, November18, 2019 L-36.com


Marine Weather and Tides
Isabela, PR

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:35AMSunset 5:51PM Monday November 18, 2019 2:42 AM AST (06:42 UTC) Moonrise 11:33PMMoonset 12:00PM Illumination 65% Phase: Waning Gibbous; Moon at 21 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- 820 Pm Ast Sun Nov 17 2019
Rest of tonight..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
Monday..East winds 5 to 10 knots backing north in the afternoon. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Monday night..East winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 12 seconds. North swell around 4 feet after midnight. Numerous showers.
Tuesday..Southeast winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northwest swell around 4 feet. Scattered showers.
Tuesday night..Southeast winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northwest swell around 4 feet in the evening. Scattered showers.
Wednesday..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Thursday..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Scattered showers.
Friday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
AMZ700 820 Pm Ast Sun Nov 17 2019
Synopsis for puerto rico and the uS. Virgin islands waters... Broad surface trough and an area of low pressure east and northeast of the forecast area, will maintain light to gentle east to northeast winds through Tuesday. Fairly tranquil seas of 5 feet or less are forecast though Monday afternoon. A small northerly swell will arrive across the atlantic waters Monday night into Tuesday. This will cause a slight increase in the seas. Brief passing showers will continue to affect portions of the coastal waters during the overnight and early morning hours.


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


Area Discussion for - San Juan, PR
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Fxca62 tjsj 180106
afdsju
area forecast discussion
national weather service san juan pr
906 pm ast Sun nov 17 2019

Update
A low-level trough will continue to draw moisture into the area,
and cause isolated to scattered showers during the overnight
hours. Tomorrow afternoon the shower activity is expected to
increase across the interior and western areas of puerto rico as a
result of diurnal heating, sea breeze convergence and orographic
effects. Light low-level steering flow tomorrow afternoon, will
cause showers to move slowly which could lead to urban and small
stream flooding as well as ponding of water on roadways similar to
today.

Aviation
Vfr conds are forecast to continue through 18 17z. Iso sct
showers are possible across E pr and usvi terminals now through
18 15z. Vcsh shra are forecast to develop across terminal sites
tjbq and tjmz by 17 18z. Vcsh shra should diminish across all
terminal sites by 19 02z. Sfc winds light and variable during the
overnight hours, then by 18 12z winds out of the east at 5 to 10
kts.

Marine
Seas are forecast to be near 5 feet across the atlantic waters.

Elsewhere, seas will range from 3 to 4 feet. Winds will be out of
the east at 10 to 15 kts. A moderate risk of rip currents for the
northern beaches of puerto rico, culebra and the u.S. Virgin
islands.

Prev discussion issued 146 pm ast Sun nov 17 2019
synopsis... Low-level moisture associated with a weak trough
moving across the area will result some enhancement in shower
activity during the afternoon hours during the first half of the
work week, mainly across interior and western puerto rico. An
upper-level trough moving near hispaniola by the end of the work
week could result in another round of enhanced shower activity as
well as some thunderstorms.

Short term... Rest of today through Tuesday...

a weak low-level trough is currently moving across the area. This
feature is resulting an increase in low-level moisture. As a
result, this moisture will combine with strong daytime heating and
sea breeze convergence to result in moderate to heavy showers
across mainly interior portions of puerto rico through this
afternoon. Given that the steering flow is very light, less than 5
knots, the showers that develop will be slow-moving. Therefore,
some urban and small stream will be possible. Any afternoon
activity will dissipate over land during the early evening hours
with the loss of daytime heating and therefore, most of the area
should observe mainly fair weather conditions. Some passing
showers may be possible overnight over portions of eastern puerto
rico and the usvi, however, rainfall accumulations should be minor
to not cause any significant impacts.

The aformentioned low-level trough is expected to be near the area
through Tuesday. Moisture content both on Monday and Tuesday are
expected to increase even further with precipitable water values
around 1.8 inches. Therefore, afternoon shower activity both days
could be more intense, mainly across interior, western, and
northwestern portions of puerto rico. In addition, the steering
flow will remain very light and thus the activity will be slow-moving
leading to urban and small stream flooding. Across the usvi, only
some isolated to scattered shower activity can be expected, but
no significant rainfall accumulations are expected at this time.

Long term... Wednesday through Monday...

prev discussion... Issued 506 am ast Sun nov 17 2019
after the passage of an upper level ridge on Tuesday that moves
into the tropical atlantic, flow will turn southwesterly Thursday
and Thursday night ahead of an approaching upper level trough.

Previous model runs had been taking this trough through on Friday,
however the latest run of the GFS from 17 00z shows the trough
stalling over hispaniola and a low pinching off to the southwest,
with only upper level clouds to show over the local area. The low
pressure is re-absorbed and the high builds back over the local
area over the following weekend.

Mid level dryness still extends through Thursday, but moisture
appears to be more feeble above 850 mb and fades on Saturday.

With lower level lows fading into the distance both to the north
and the west, flow from the southeast flips to the northeast on
Wednesday with the approach of an easterly wave. Pockets of
moisture at lower levels continue to transit through the area but
substantially drier air is forecast to enter the area Saturday
through Monday on the southeast flow behind the trough that
although much weakened should pass through the area on Friday.

This scenario will bring improving weather conditions on Wednesday
and Thursday, with enhanced shower activity on Friday, but
gradual drying Saturday through Monday. Even on Friday, widespread
rains are not expected and amounts will generally light with only
pockets of heavy showers or isolated thunderstorms on Friday as
500 mb temperatures briefly cool below minus 7 degrees.

Aviation... MostlyVFR conds are expected to prevail at all taf
sites during the forecast cycle. Shra -shra may briefly affect
jmz jps and possibly jsj jbq through about 17 22z. Easterly winds at
10 knots or less with some sea breeze variations, becoming light and
variable early in the evening.

Marine... Fairly tranquil conditions are expected through at least
Monday afternoon, with seas remaining at 5 feet or less. A small
northerly swell is expected to impact the atlantic waters by
Monday night into Tuesday, causing a slight increase in seas.

However, at this time, seas look to remain below small craft
advisory criteria. A moderate risk of rip currents is expected to
continue for the north-facing beaches of the islands.

Preliminary point temps pops
Sju 76 87 77 87 40 30 40 40
stt 76 87 76 87 40 30 40 40

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Tw
long term... .Ram


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AROP4 - 9757809 - Arecibo, PR 16 mi66 min SSE 5.1 G 7
PTRP4 16 mi37 min ESE 2.9 G 4.1 76°F
41115 - Rincon, Puerto Rico (181) 17 mi42 min 85°F3 ft
MGZP4 - 9759394 - Mayaguez, PR 21 mi66 min 86°F1010.3 hPa
MGIP4 - 9759110 - Magueyes Islands, PR 37 mi66 min Calm G 1 78°F 84°F1010.3 hPa
SJNP4 - 9755371 - San Juan, PR 47 mi60 min S 2.9 G 4.1 80°F 85°F1009.8 hPa
41053 - San Juan, PR 48 mi102 min SSE 3.9 G 5.8 81°F 85°F4 ft1009 hPa (-0.7)

Wind History for Arecibo, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Aquadilla, Rafael Hernandez Airport, PR6 mi1.9 hrsSSE 310.00 miFair75°F71°F89%1010.5 hPa

Link to 5 minute data for TJBQ

Wind History from JBQ (wind in knots)
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Last 24hr----------SE3CalmSE6SE5NE9NE9NE9E8
G14
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1 day ago----------CalmSE3SE3E7E6NE8E11NE11
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2 days ago----------SE4SE4E6E6E12E9E14
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Tide / Current Tables for Aguadilla, Crashboat Beach, Puerto Rico
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Mayaguez, Puerto Rico
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Mayaguez
Click for Map
Mon -- 05:53 AM AST     0.11 feet Low Tide
Mon -- 06:36 AM AST     Sunrise
Mon -- 12:00 PM AST     Moonset
Mon -- 01:13 PM AST     1.87 feet High Tide
Mon -- 05:50 PM AST     Sunset
Mon -- 08:15 PM AST     0.59 feet Low Tide
Mon -- 11:33 PM AST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.90.70.50.30.20.10.20.40.81.11.51.81.91.81.71.41.10.80.70.60.60.70.9

Weather Map
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wmap_A
GEOS Local Image of Puerto Rico    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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (1,6,7,8)
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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.