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Marine Weather and Tides
Version 3.4 |
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 6:05AM | Sunset 6:51PM | Saturday August 17, 2019 10:12 AM AST (14:12 UTC) | Moonrise 8:29PM | Moonset 7:44AM | Illumination 96% |  |
AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 427 Am Ast Sat Aug 17 2019
Today..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated Thunderstorms in the morning. Scattered showers through the day.
Tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated Thunderstorms in the evening, then isolated showers after midnight.
Sunday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
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 Thunderstorms.
Monday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Numerous showers and isolated Thunderstorms.
Tuesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated Thunderstorms. Scattered showers.
Wednesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Today..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated Thunderstorms in the morning. Scattered showers through the day.
Tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated Thunderstorms in the evening, then isolated showers after midnight.
Sunday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
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 Thunderstorms.
Monday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Numerous showers and isolated Thunderstorms.
Tuesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated Thunderstorms. Scattered showers.
Wednesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
AMZ700 427 Am Ast Sat Aug 17 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure centered across the north central atlantic and a surface trough moving across the regional waters will help to maintain moderate to fresh east to northeast winds across the local waters. Moisture embedded in the east to northeast trade winds will result in periods of passing showers across the regional waters through the upcoming weekend. A tropical wave is forecast to move through the area bringing additional showers and isolated Thunderstorms late Sunday through Tuesday night.
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure centered across the north central atlantic and a surface trough moving across the regional waters will help to maintain moderate to fresh east to northeast winds across the local waters. Moisture embedded in the east to northeast trade winds will result in periods of passing showers across the regional waters through the upcoming weekend. A tropical wave is forecast to move through the area bringing additional showers and isolated Thunderstorms late Sunday through Tuesday night.
7 Day Forecast for Marine Location Near Naranjito, PR
Hourly EDIT Helplocation: 18.31, -66.18 debug
Area Discussion for - San Juan, PR
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxca62 tjsj 170938 afdsju area forecast discussion national weather service san juan pr 538 am ast Sat aug 17 2019 Synopsis A weak trough will bring scattered showers to the area today. A tropical wave will bring showers and thunderstorms Sunday through Tuesday with drying on Wednesday. A weak disturbance on Thursday and another wave on Saturday morning of next week will bring some more showers and thunderstorms. Short term Today through Monday... a broad upper level low north of the region and an associated lower level trough is producing scattered to locally numerous showers and isolated thunderstorms across the regional waters and over portions of the islands. These two features in combination with daytime heating and sea breeze convergence will aid in the development of afternoon showers and thunderstorms, mainly along the interior and western sections of pr as well across san juan and vicinity. Urban and small stream flooding, frequent lightning and brief gusty winds are possible with this activity. Elsewhere, brief heavy showers can develop during the afternoon hours. Moisture drops overnight, as a drier air mass ahead of a tropical wave moves from the east and limits shower activity across the region. However, due to the proximity of the upper level low thunderstorms can not be ruled out across portions of the atlantic and western waters of pr. By Sunday afternoon, tropical moisture associated to the tropical wave should gradually increase from the eastern caribbean waters into the forecast area. As the wave is not expected to cross the region till later in the day, diurnally induced afternoon showers and thunderstorms are expected to develop in the usual areas and between the usvi and eastern pr waters. Model guidance suggest that the low to mid levels of the atmosphere will be saturated due to the wave passage and that the strongest or best chances for rain and thunderstorms should be across the caribbean waters and eastern sections of pr and over the usvi through Monday afternoon and similar or less amounts over the western half of pr. Long term Tuesday through Saturday... high pressure at upper levels will have nosed in from the east |
northeast over the local area by Tuesday. Although lower pressure will be southeast high pressure will hold to the north through the end of the period and be the dominant influence over the weather. Behind the tropical wave that moved through late Sunday and Monday a band of moisture will flow over the area in east southeast flow until a 700 mb ridge passes on Tuesday afternoon (20 18z). Then flow will switch to east northeast at 700 mb and bring some of the moisture back over the area. This will allow good convection over puerto rico during the afternoon and evening. This flow will also be weakly reflected in the surface flow so as to keep temperatures on the north coast more moderate and generally no higher than the lower 90s a few miles inland. Conditions on Wednesday and Thursday become more stable and moisture will fall below 2 inches of precipitable water on Tuesday night with only minor peaks on Wednesday night and Thursday evening to bring enhancement to shower activity. Thunderstorms should be limited, if any, to the afternoon in western puerto rico Wednesday. Although moisture will continue low Wednesday through Friday, some disturbances will trigger scattered showers Thursday afternoon and Friday night into Saturday. Aviation MainlyVFR conditions expected through the morning hours across all terminals. Afternoon shra tsra could cause tempo MVFR to brief ifr conditions at tjmz tjbq. Brief MVFR conditions are also possible at tjsj btw 17z-21z. Winds are expected to prevail from the e-ese at 10-15 kt aft 14z with sea breeze variations. Marine Small craft advisory conditions are not expected through the next 7 days. Brief gusty winds, torrential rains and frequent lighting will accompany thunderstorms generated by a passing tropical wave Sunday night through Tuesday night. Preliminary point temps pops Sju 89 79 89 78 40 20 40 60 stt 89 80 88 78 50 40 50 70 Sju watches warnings advisories Pr... None. Vi... None. Am... None. Short term... Ds long term... .Ws |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| SJNP4 - 9755371 - San Juan, PR | 11 mi | 54 min | E 7 G 9.9 | 84°F | 85°F | 1017.3 hPa | ||
| JOXP4 - Jobos Bay Reserve, Puerto Rico | 25 mi | 87 min | ENE 4.1 | 86°F | 1018 hPa | 73°F | ||
| YABP4 - 9754228 - Yabucoa Harbor, PR | 25 mi | 54 min | 88°F | 75°F | ||||
| AROP4 - 9757809 - Arecibo, PR | 30 mi | 54 min | NE 4.1 G 7 | |||||
| 42085 - Southeast of Ponce, PR | 36 mi | 72 min | E 9.7 G 12 | 85°F | 1015.9 hPa (+0.8) | |||
| ESPP4 - 9752695 - Esperanza, PR | 40 mi | 54 min | E 7 G 12 | 80°F | 85°F | 1017.9 hPa | ||
| CLBP4 - 9752235 - Culebra, PR | 47 mi | 60 min | 86°F | 85°F | 1017.4 hPa |
Wind History for San Juan, PR
(wind in knots) EDIT (on/off) Help| 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | |
| Last 24hr | NE G14 | NE | NE | NE | NE | NE G17 | NE G14 | NE G14 | NE G16 | NE | NE G17 | NE | NE G13 | NE | NE | E G13 | NE G11 | E G14 | E | SE | NE G7 | SW | S | E G12 |
| 1 day ago | E | E | E G22 | E G22 | E G25 | E G24 | E G22 | E G23 | E G20 | E G19 | E G17 | E G17 | E | E G17 | E G16 | E | E | E | E | E G15 | E G13 | E | E | E G13 |
| 2 days ago | E | E G13 | NE G16 | NE G21 | E G17 | E G19 | E G22 | E G24 | E G22 | E | E | E G16 | E G16 | E | E G12 | E | E | E G14 | E G13 | E G13 | E G15 | E G17 | E G17 | E G17 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| San Juan, Luis Munoz Marin International Airport, PR | 13 mi | 76 min | E 9 | 10.00 mi | Partly Cloudy | 86°F | 75°F | 72% | 1017 hPa |
Link to 5 minute data for TJSJ
Wind History from JSJ (wind in knots)
| 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | |
| Last 24hr | E | NE | NE G16 | NE | NE | NE | NE G21 | NE | NE G27 | E | E | E | NE | NE | E | SE | Calm | SE G14 | S | Calm | E | |||
| 1 day ago | E | E G24 | E | E G26 | E G23 | E G26 | E | E | E | E | E | E | E | E | E | E | E | E | E | E | NE | |||
| 2 days ago | E | E | E | E | NE G23 | E G22 | E | E | E | E | E | E | E | E | E | E | E | E | E | E | E | E | E | E |
Tide / Current Tables for San Juan, Puerto Rico (3)
EDIT Weekend mode (on/off) (on/off) Help One Week of DataSan Juan
Click for Map
Sat -- 04:40 AM AST 0.57 feet Low Tide
Sat -- 06:06 AM AST Sunrise
Sat -- 07:43 AM AST Moonset
Sat -- 09:54 AM AST 1.19 feet High Tide
Sat -- 03:59 PM AST 0.24 feet Low Tide
Sat -- 06:50 PM AST Sunset
Sat -- 08:28 PM AST Moonrise
Sat -- 10:47 PM AST 1.62 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 04:40 AM AST 0.57 feet Low Tide
Sat -- 06:06 AM AST Sunrise
Sat -- 07:43 AM AST Moonset
Sat -- 09:54 AM AST 1.19 feet High Tide
Sat -- 03:59 PM AST 0.24 feet Low Tide
Sat -- 06:50 PM AST Sunset
Sat -- 08:28 PM AST Moonrise
Sat -- 10:47 PM AST 1.62 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 1.5 | 1.2 | 1 | 0.7 | 0.6 | 0.6 | 0.7 | 0.8 | 1 | 1.1 | 1.2 | 1.1 | 0.9 | 0.7 | 0.5 | 0.3 | 0.2 | 0.3 | 0.5 | 0.8 | 1.1 | 1.4 | 1.6 | 1.6 |
Tide / Current Tables for San Juan, Puerto Rico (2) (expired 1998-12-31)
EDIT (on/off) Help One Week of DataSan Juan
Click for Map
Sat -- 04:41 AM AST 0.58 feet Low Tide
Sat -- 06:06 AM AST Sunrise
Sat -- 07:43 AM AST Moonset
Sat -- 09:54 AM AST 1.18 feet High Tide
Sat -- 03:59 PM AST 0.25 feet Low Tide
Sat -- 06:50 PM AST Sunset
Sat -- 08:28 PM AST Moonrise
Sat -- 10:47 PM AST 1.61 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 04:41 AM AST 0.58 feet Low Tide
Sat -- 06:06 AM AST Sunrise
Sat -- 07:43 AM AST Moonset
Sat -- 09:54 AM AST 1.18 feet High Tide
Sat -- 03:59 PM AST 0.25 feet Low Tide
Sat -- 06:50 PM AST Sunset
Sat -- 08:28 PM AST Moonrise
Sat -- 10:47 PM AST 1.61 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 1.5 | 1.2 | 1 | 0.7 | 0.6 | 0.6 | 0.7 | 0.8 | 1 | 1.1 | 1.2 | 1.1 | 0.9 | 0.7 | 0.5 | 0.3 | 0.3 | 0.3 | 0.5 | 0.8 | 1.1 | 1.4 | 1.6 | 1.6 |
Weather Map and Satellite Images
(on/off) HelpWeather Map
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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for (10,2,3,4)
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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. |