Thursday, September24, 2020
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L-36.com

Marine Weather and Tides
Lamboglia, PR

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 6:12AMSunset 6:19PM Thursday September 24, 2020 11:30 AM AST (15:30 UTC) Moonrise 1:27PMMoonset 12:00AM Illumination 49% Phase: First Quarter Moon; Moon at 7 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- 1026 Am Ast Thu Sep 24 2020
.small craft should exercise caution...
Rest of today..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 12 seconds. South swell 4 to 5 feet. Isolated showers.
Tonight..East winds 5 to 10 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 12 seconds. Southeast swell 4 to 5 feet. Isolated showers through the night.
Friday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 12 seconds. Southeast swell around 4 feet. Isolated showers.
Friday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Southeast swell around 4 feet in the evening. Isolated showers.
Saturday..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 11 seconds. Isolated showers.
Sunday..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated showers.
Monday..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 1026 Am Ast Thu Sep 24 2020
Synopsis for puerto rico and the uS. Virgin islands waters... Long dominant period northerly swells will continue to affect the local waters today although gradually diminishing through Friday night. Consequently,hazardous seas will continue. Light to gentle southeast winds will prevail across the regional waters today, then becoming more easterly on Friday. The remnants of an old frontal boundary will aid in the development of showers and Thunderstorms over the local waters and passages through tonight.


7 Day Forecast for Marine Location Near Lamboglia, PR
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location: 17.97, -66     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 241238 CCA AFDSJU

Area Forecast Discussion . CORRECTED National Weather Service San Juan PR 838 AM AST Thu Sep 24 2020

SYNOPSIS.

Hazardous coastal conditions will continue across the north-facing beaches of Puerto Rico and the U.S. Virgin Islands. Unsettled weather conditions will persist as an old frontal boundary with plenty of tropical moisture continues to produce periods of showers and thunderstorms across the local islands.

SHORT TERM. Today through Saturday .

Long-period northerly swell is impacting the Atlantic Coastline of Puerto Rico and the U.S. Virgin Islands. This event is producing hazardous coastal conditions, and residents can expect life- threatening rip-currents and high surfs, and isolated coastal flooding. Therefore, High Surf Advisory, Coastal Flood Advisory, and a High Risk of Rip Currents are in effect for all the north and northeast facing beaches in Puerto Rico and the U.S. Virgin Islands.

We have recently been under the influence of a trough of low pressure with its associated surface front, and ample shower activity with strong thunderstorms occured yesterday as a result. This trough, coupled with high precipitable water values, will produce more active weather for today. Winds will be more out of the east, which is, of course, more normal for our region, yet low level winds will remain light, meaning slower-moving showers and higher rainfall amounts. High resolution model guidance suggests interior and western Puerto Rico will be the focus of the activity, but most of Puerto Rico has a decent chance of rainfall today. Urban and small stream flooding will be the biggest threat, and frequent lightning with gusty winds from thunderstorms will also be a concern. Temperatures are not expected to be quite as warm for the San Juan metro area as the past few days, given the change in wind direction.

Heading into Friday and the weekend, one factor will cause our weather pattern to shift to something a bit more normal. High surface pressure will strengthen over the western Atlantic, enhancing pressure gradients and the local low-level wind flow. Thus, a return to easterly winds of around 10 knots can be expected. The weather will still be quite active though. Weak troughing will still be over us for Friday and Saturday, and that will help to enhance the chances for thunderstorms. Furthermore, there will still be plenty of moisture available from the surface trough. Thus, for Friday, with winds expected to be pretty much easterly, showers and thunderstorms will develop in the afternoon over western and interior Puerto Rico, and there will be a good chance for isolated flooding. Saturday may not be quite as active, as precipitable water values drop a bit, yet moderate to heavy showers with thunderstorms will still develop in the afternoon over interior, western, and southwestern Puerto Rico. Finally, with the help of troughing over the region, shower and isolated thunderstorm activity will remain a threat over the local waters for the next few days.

LONG TERM. Sunday through Friday .

A surface high-pressure across the Atlantic Ocean will tighten the local pressure gradient, and will be the dominant weather feature in the first part of next week. Then, the leading edge of a tropical wave will reach the islands around Tuesday, and its axis will cross on Wednesday. After the passage of the wave, model guidance is suggesting the arrival of a drier air mass with African dust around late Wednesday night or early Thursday morning into Friday. However, GFS dry-out faster than the ECMWF.

At upper levels, a trough across the Atlantic Waters, northeast of Puerto Rico and the U.S. Virgin Islands, will induce surface perturbations Sunday and Monday. The aformentioned surface high- pressure will push these perturbations across the islands Sunday and Monday. A mid-level high pressure will slowly build over the eastern Atlantic, moving into the northeast Caribbean Tuesday through Thursday when a mid- to upper-level trough is forecast to amplify from the northeast into the region of Puerto Rico and the U.S. Virgin Islands by Friday.

AVIATION.

VFR conds have prevailed overnight, and will mostly continue today. VCSH/VCTS will continue for the smaller islands TKPK/TNCM/TIST/TISX through the morning. Winds light and VRB through the morning. Light easterly winds thereafter with sea breeze variations. VCTS and possibly TSRA possible this afternoon for TJSJ/TJMZ/TJPS/TJBQ.

MARINE. Dangerous marine conditions continue due to a long-period northerly swell. Mariners can expect seas between 8 and 12 feet across the Atlantic Waters and Caribbean Passages through at least today. Marine conditions are forecast to improve late today into tonight, when the northerly swell energy dissipates. A tropical wave could increase the chance for showers and thunderstorms again Tuesday into Wednesday next week.

PRELIMINARY POINT TEMPS/POPS. SJU 93 77 89 79 / 50 40 40 30 STT 90 80 90 79 / 40 40 40 30

SJU WATCHES/WARNINGS/ADVISORIES. PR . High Rip Current Risk through late tonight for Culebra-Mayaguez and Vicinity-North Central-Northeast-Northwest-San Juan and Vicinity-Southeast-Southwest-Vieques.

High Surf Advisory until 6 PM AST this evening for Culebra- Mayaguez and Vicinity-North Central-Northeast-Northwest-San Juan and Vicinity-Southeast.

Coastal Flood Advisory until 6 PM AST this evening for Culebra- Mayaguez and Vicinity-North Central-Northeast-Northwest-San Juan and Vicinity-Southeast.

VI . High Rip Current Risk through late tonight for St Thomas. St. John . and Adjacent Islands.

High Surf Advisory until 6 PM AST this evening for St Thomas. St John. and Adjacent Islands.

High Rip Current Risk through this afternoon for St Croix.

AM . Small Craft Advisory until 2 PM AST Friday for Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-Coastal Waters of Northern Puerto Rico out 10 NM.

Small Craft Advisory until 8 AM AST Friday for Anegada Passage Southward to 17N-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 8 PM AST Friday for Coastal Waters of Northwestern Puerto Rico out 10 NM-Coastal Waters of Southwestern Puerto Rico out 10 NM-Mona Passage Southward to 17N.



SHORT TERM . mb LONG TERM . CAM


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
JOXP4 - Jobos Bay Reserve, Puerto Rico 12 mi106 min E 4.1 89°F 1018 hPa77°F
42085 - Southeast of Ponce, PR 29 mi91 min E 5.8 G 7.8 85°F 87°F2 ft1015.6 hPa (+1.6)
ESPP4 - 9752695 - Esperanza, PR 29 mi43 min E 6 G 8 85°F1017 hPa
SJNP4 - 9755371 - San Juan, PR 34 mi43 min ENE 6 G 7 85°F 87°F1016.8 hPa
41053 - San Juan, PR 35 mi31 min E 5.8 G 7.8 85°F 86°F8 ft1015.6 hPa (+0.8)
41056 35 mi91 min E 7.8 G 12 84°F 86°F5 ft1015.8 hPa (+1.7)
CLBP4 - 9752235 - Culebra, PR 43 mi43 min 83°F 86°F1016.6 hPa

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

Link to 5 minute data for TJPS

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
Click for Map
Thu -- 06:03 AM AST     0.03 feet Low Tide
Thu -- 06:13 AM AST     Sunrise
Thu -- 01:27 PM AST     Moonrise
Thu -- 06:18 PM AST     Sunset
Thu -- 08:06 PM AST     1.07 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.80.70.50.30.1000.10.10.20.30.50.60.70.80.9111.11.11.111

Tide / Current Tables for Punta Tuna, Puerto Rico
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Punta Tuna
Click for Map
Thu -- 06:12 AM AST     Sunrise
Thu -- 06:27 AM AST     -0.08 feet Low Tide
Thu -- 01:26 PM AST     Moonrise
Thu -- 04:28 PM AST     0.85 feet High Tide
Thu -- 06:17 PM AST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.30.20.10-0-0.1-0.1-00.10.20.30.50.60.70.80.80.80.80.80.70.60.60.5

Weather Map
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wmap_A
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station Puerto Rico,Virgin Islands
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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 numerous 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.