Monday, August21, 2017 L-36.com


Marine Weather and Tides
Ponce, 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 6:09AMSunset 6:49PM Monday August 21, 2017 11:28 PM AST (03:28 UTC) Moonrise 5:54AMMoonset 6:54PM Illumination 0% Phase: New Moon; Moon at 29 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- 907 Pm Ast Mon Aug 21 2017
Rest of 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 through the night.
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 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
Wednesday night..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated showers.
Thursday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Friday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Saturday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated showers, then isolated Thunderstorms.
AMZ700 907 Pm Ast Mon Aug 21 2017
Synopsis for puerto rico and the uS. Virgin islands waters... Local pressure gradient will weaken overnight across the regional waters allowing for light to moderate easterly trade winds and diminishing seas through at least Wednesday. Thereafter...surface high pressure in the central atlantic will again reestablish and build north of the area,resulting in moderate easterly trade winds.

7 Day Forecast for Marine Location Near Ponce, PR
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location: 17.97, -66.62     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 220106
afdsju
area forecast discussion
national weather service san juan pr
906 pm ast Mon aug 21 2017

Update Latest satellite images this evening depicted an area
of relatively drier air moving across the u.S. Virgin islands and
puerto rico from the east. This area of relatively drier air will
continue to encompass the region tonight and Tuesday. As a
result, only light passing showers are expected to affect the
local islands and surrounding waters tonight and early Monday.

Surface analysis from tafb indicated a weak tropical wave just
across the eastern caribbean this afternoon. Not significant
convection is associated with this wave. However, for Tuesday
afternoon, the limited moisture provided by the wave in
combination with daytime heating and local effects will produce
showers and a couple of thunderstorms mainly across the western
interior and west sections of puerto rico. This activity is
expected to diminish rapidly after sunset. Not significant shower
activity is expected across the usvi.

Aviation Mostly skc withVFR conds expected durg prd. L lvl
wnd e-se at 10 kts overnight increasing again to 10-15 knots
after 22 13z. Shra isold tsra will remain mainly ovr ctrl and w
interior sections of pr after 22 16z.

Marine Mariners can expect seas up to 6 feet and winds between
10 to 15 knots. Mariners are urged to exercise caution mostly across
the atlantic waters. Seas will continue to improve through the
work week with seas at 5 feet or less.

Prev discussion issued 534 pm ast Mon aug 21 2017
synopsis... A fairly dry air mass moved across the region today with
limited or no shower activity observed across most of the islands.A
few afternoon showers were noted across the interior sections of
pr but elsewhere mostly sunny skies prevailed. High pressure ridge
across the region will maintain fairly dry and stable conditions
overnight through early Tuesday. Ridge aloft will however erode by
late Tuesday through Wednesday therefore increasing the
instability aloft. Ridge will again build aloft and north of the
region by Thursday and Friday.

Short term... Rest of today through Wednesday... An area of low level
moisture in the prevailing east to northeast wind flow is expected
to affect the region by early Tuesday. This will increase the chance
for early morning showers followed by locally and diurnally induced
afternoon showers and possibly isolated thunderstorms. The activity
should be mainly over the interior and west sections of pr. On Wednesday
a weak tropical is forecast to move across the region. This added moisture
along with the increasing instability aloft will support a better chance
for enhanced afternoon convection across portions of the coastal waters
and parts of the islands especially during the afternoon hours.

Long term... Thursday through Tuesday... The previously mentioned tropical
wave is forecast to move across the region Wednesday through Thursday,
increasing the chance for showers and thunderstorms. A drier airmass
is expected late Thursday through Friday, however locally and diurnally
induced showers and isolated afternoon thunderstorms will remain possible
each day mainly over the west and interior sections of pr. Model guidance
also suggest the presence of saharan dust across the region through
most of the period, with the highest concentration expected on Friday.

Late Saturday through Sunday a surface trough is forecast to arrive,followed
by drier conditions on Monday. Another tropical wave is so far forecast
to approach the region by Tuesday but so far no significant development
is expected with any of these features at this time based on model guidance
and the present and expected weather pattern.

Aviation... Shra isold tsra will remain mainly ovr ctrl and w
interior sections of pr til 20 22z. Elsewhere mostly skc withVFR
conds durg prd. L lvl wnd e-se 15-20 kts blo fl200. Sfc wnds E to
ese winds at 10-15 knots.

Marine... The small craft advisory in the atlantic offshore waters
continues in effect until 2 pm ast. Then mariners can expect seas
up to 6 feet and winds between 15 to 20 knots. Seas are forecast
to improve through the work week with seas at 5 feet or less.

Preliminary point temps pops
Sju 79 88 78 88 30 20 20 40
stt 80 90 79 89 40 20 40 40

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Jf
long term... .99


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
42085 - Southeast of Ponce, PR 9 mi58 min ENE 12 G 14 85°F 1015.6 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 21 mi103 min Calm 80°F 1017 hPa74°F
IMGP4 22 mi18 min E 5.1 G 8 82°F 1015.6 hPa
MGIP4 - 9759110 - Magueyes Islands, PR 23 mi40 min Calm G 2.9 82°F 85°F1016.3 hPa
MGZP4 - 9759394 - Mayaguez, PR 33 mi46 min ENE 1.9 G 5.1 81°F 1016.6 hPa
AROP4 - 9757809 - Arecibo, PR 36 mi40 min SE 4.1 G 5.1
YABP4 - 9754228 - Yabucoa Harbor, PR 42 mi40 min NNW 1 G 1.9 83°F
SJNP4 - 9755371 - San Juan, PR 43 mi46 min SE 7 G 9.9 84°F 85°F1017.4 hPa
PTRP4 43 mi18 min ENE 5.1 G 8.9 79°F
41053 - San Juan, PR 44 mi58 min E 12 G 14 84°F 1016.5 hPa
41115 - Rincon, Puerto Rico (181) 45 mi28 min 85°F3 ft

Wind History for Penuelas (Punta Guayanilla), PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ponce, Mercedita Airport, PR4 mi38 minENE 510.00 miA Few Clouds79°F75°F89%1017.6 hPa

Wind History from JPS (wind in knots)
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Last 24hrNE5CalmCalmCalmCalm------------------------------------E5
1 day agoNE5----------Calm--------------------------------Calm
2 days agoE10E5E5E5E5NE5----------------------------------NE5

Tide / Current Tables for Playa de Ponce, Puerto Rico
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Playa de Ponce
Click for Map
Mon -- 05:53 AM AST     Moonrise
Mon -- 06:10 AM AST     Sunrise
Mon -- 12:21 PM AST     0.17 feet Low Tide
Mon -- 02:31 PM AST     New Moon
Mon -- 06:48 PM AST     Sunset
Mon -- 06:54 PM AST     Moonset
Mon -- 09:32 PM AST     0.95 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.80.70.70.60.50.50.40.40.30.20.20.20.20.20.30.40.60.70.80.90.910.9

Tide / Current Tables for Punta Guayanilla, Puerto Rico
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Punta Guayanilla
Click for Map
Mon -- 05:54 AM AST     Moonrise
Mon -- 06:10 AM AST     Sunrise
Mon -- 11:30 AM AST     0.23 feet Low Tide
Mon -- 02:31 PM AST     New Moon
Mon -- 06:49 PM AST     Sunset
Mon -- 06:54 PM AST     Moonset
Mon -- 11:05 PM AST     0.80 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.80.70.60.50.50.40.40.30.30.30.20.20.20.30.30.40.50.60.70.70.80.80.8

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 (23,6,7,8)
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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.