Saturday, February24, 2018 L-36.com


Marine Weather and Tides
Tallaboa, 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 6:47AMSunset 6:33PM Saturday February 24, 2018 3:51 AM AST (07:51 UTC) Moonrise 1:19PMMoonset 1:41AM Illumination 66% 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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AMZ735 Coastal Waters Of Southern Puerto Rico Out 10 Nm- 921 Pm Ast Fri Feb 23 2018
.small craft should exercise caution...
Rest of tonight..Northeast winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers through the night.
Saturday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers through the day.
Saturday night..Northeast 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 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Sunday night..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Monday..Northeast winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Tuesday..Northeast winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Wednesday..Northeast winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 12 seconds. Isolated showers.
AMZ700 921 Pm Ast Fri Feb 23 2018
Synopsis for puerto rico and the uS. Virgin islands waters... Moderate to fresh east northeast winds generated by a strong surface high pressure over the western atlantic, will keep hazardous seas across the regional waters and passages through the weekend. A long period northeast swell will create hazardous seas once again by midweek next week.

7 Day Forecast for Marine Location Near Tallaboa, PR
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location: 17.98, -66.76     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 240159
afdsju
area forecast discussion
national weather service san juan pr
959 pm ast Fri feb 23 2018

Update Passing showers increased over the local atlantic waters
during the evening. These showers are expected to affect mainly
the eastern and northern portions of pr and the northern usvi.

Some of these showers could be heavy at times but overall they
should be brief. However, the frequency of showers are expected to
increase during the morning hours on Saturday, as more showers
across the atlantic waters under a northeast flow will continue to
stream across the local area. No significant change from previous
forecast.

Aviation update MainlyVFR conds expected to prevail early in
the fcst period. Shra increasing from the atlantic waters are
expected to affect at times after 08z tist and the northern pr
terminals. Latest 24 00z indicated ene winds between 8-34 kts
below fl100.

Marine update Local buoys were indicating seas between 6-8
feet around 10-15 seconds during the past few hours and east to
northeast trades around 15 kt with gusts in the low 20s. Seas will
continue to slowly decrease through the weekend. However, rough
breaking wave action will continue to result in life threatening
rip currents along the northern exposed beaches of pr and portions
of the smaller islands through the weekend.

Prev discussion issued 404 pm ast Fri feb 23 2018
synopsis... Surface high pressure will hold across the western
atlantic just north of the area while weakening over the weekend
and into early next week. As a result winds are expected to
diminish and hazardous marine conditions to subside. Moisture will
increase during the weekend and until early next week. A gradual
drying trend will then expected by mid week.

Short term... Tonight through Sunday...

latest radar observations as well as satellite images depicted
small patches of cloudiness and showers across the atlantic waters
moving from time to time across the local islands. This activity
will continue to affect mostly the u.S. Virgin islands, vieques,
culebra as well the northern and eastern sections of puerto rico
tonight and Saturday morning with brief periods of moderate to
locally heavy rain. Due to the rapid movement of the showers, rainfall
amount are expected to be minimal but will produce hazardous
driving conditions. Some showers are also expected to develop
across the interior and western sections of puerto rico each
afternoon. A strong surface high pressure will hold across the
western atlantic north of region while weakening until early next
week. This feature will remain as the main weather feature across
the local islands during the rest of the weekend and through
early next week.

An upper level trough is expected to remain from the atlantic
waters southwestward across hispaniola and jamaica through the
weekend. The surface high pressure will continue to push patches
of moisture across the local islands, which will result in
showers activity across the region mostly during the overnight
and early morning hours. Then during the afternoon hours, this
moisture will combine with the upper level dynamic to result in
showers over the western portions of puerto rico as well as
downwind from the u.S. Virgin islands each afternoon.

Long term... Monday through Saturday... From previous
discussion... Surface high pressure will fade in the western
atlantic just north of the local area early next week, but will be
replaced by a second high moving out of the eastern united states
Wednesday through Friday. The rumpled remains of a cold front
will pass through the area Monday through Tuesday next week with
continued shower activity, even while precipitable water values
trend downward from Sunday's peak. This will be due to drying at
the top of the lower levels of the atmosphere. A drier and much
more stable air mass will be ushered in behind the remnants of the
cold front passage on Tuesday. This will limit shower activity
area- wide. Moist air behind a second front on Friday of next week
will prepare the area for possibly more shower activity and a
more vigorous pre-frontal trough early in the week after next.

Aviation...VFR conds are expected to prevail through the forecast
cycle with vcsh at the leeward and usvi terminals as well as
jsj jbq. Isolated shra -shra in and around jmz through 23 22z. Ene
winds 15-20 knots with higher gusts, becoming at around 12 knots
overnight.

Marine... Seas are expected to subside slowly tonight through
Sunday, such that by Sunday night all small craft advisories
should be down. Swell from a strong low in the northern atlantic
mid week next week will send another surge of swell into the area
Wednesday night and Thursday when small craft advisories will
again be needed for the atlantic waters and passages.

Preliminary point temps pops
Sju 73 82 73 83 60 60 60 60
stt 72 83 72 83 60 60 60 60

Sju watches warnings advisories
Pr... High rip current risk through late Saturday night for culebra-
mayaguez and vicinity-north central-northeast-northwest-san
juan and vicinity-vieques-western interior.

High surf advisory until 6 am ast Saturday for culebra-mayaguez
and vicinity-north central-northeast-northwest-san juan and
vicinity-southeast-western interior.

High rip current risk until 6 am ast Saturday for central
interior-southeast.

Vi... High rip current risk through late Saturday night for st croix.

High surf advisory until 6 am ast Saturday for st croix-
st.Thomas... St. John... And adjacent islands.

High rip current risk through Saturday afternoon for
st.Thomas... St. John... And adjacent islands.

Am... Small craft advisory until 8 am ast Sunday for caribbean
waters of puerto rico from 10 nm to 17n-coastal waters of
northern puerto rico out 10 nm-coastal waters of northern usvi
and culebra out 10 nm-coastal waters of southern usvi vieques
and eastern puerto rico out 10 nm-mona passage southward to 17n.

Small craft advisory until 2 pm ast Sunday for anegada passage
southward to 17n-atlantic waters of puerto rico and usvi
from 10 nm to 19.5n.

Small craft advisory until 2 am ast Sunday for coastal waters of
northwestern puerto rico out 10 nm.

Short term... Ds
long term... .Jf


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
42085 - Southeast of Ponce, PR 15 mi112 min NNE 12 G 14 77°F 78°F1016.7 hPa (-1.5)
JOXP4 - Jobos Bay Reserve, Puerto Rico 29 mi67 min NNE 5.1 73°F 1017 hPa64°F
AROP4 - 9757809 - Arecibo, PR 35 mi52 min SSE 4.1 G 5.1
41115 - Rincon, Puerto Rico (181) 39 mi52 min 79°F5 ft
SJNP4 - 9755371 - San Juan, PR 48 mi52 min 77°F1017.9 hPa (-1.5)
YABP4 - 9754228 - Yabucoa Harbor, PR 49 mi52 min 72°F
41053 - San Juan, PR 49 mi52 min E 16 G 18 77°F 78°F8 ft1016.8 hPa (-1.5)

Wind History for Penuelas (Punta Guayanilla), 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----------------------------------------------Calm
1 day ago----------------------------------------------NE5
2 days agoSE8E6E5------------------------------------------

Tide / Current Tables for Punta Guayanilla, Puerto Rico
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Punta Guayanilla
Click for Map
Sat -- 01:41 AM AST     Moonset
Sat -- 06:49 AM AST     Sunrise
Sat -- 07:19 AM AST     0.57 feet High Tide
Sat -- 01:18 PM AST     Moonrise
Sat -- 06:31 PM AST     Sunset
Sat -- 09:48 PM AST     -0.19 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-00.10.20.30.40.50.50.60.60.50.40.30.20.20.10-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.2

Tide / Current Tables for Guanica, Puerto Rico
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Guanica
Click for Map
Sat -- 01:41 AM AST     Moonset
Sat -- 05:52 AM AST     0.53 feet High Tide
Sat -- 06:49 AM AST     Sunrise
Sat -- 01:19 PM AST     Moonrise
Sat -- 06:32 PM AST     Sunset
Sat -- 07:28 PM AST     -0.20 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.20.30.40.50.50.50.50.50.40.30.30.20.1-0-0.1-0.1-0.2-0.2-0.2-0.2-0.2-0.1-0.1

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 (2,6,7,8)
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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.