Marine Weather and Tides
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 5:23AM||Sunset 6:08PM||Sunday July 12, 2020 4:15 PM CST (22:15 UTC)||Moonrise 12:00AM||Moonset 11:41AM||Illumination 50%|
7 Day Forecast for Marine Location Near Pole Ojea, PRHourly EDIT Help
Area Discussion for - San Juan, PR  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXCA62 TJSJ 122032 AFDSJU
Area Forecast Discussion National Weather Service San Juan PR 432 PM AST Sun Jul 12 2020
Lingering moisture associated with the previous tropical wave will continue to result in passing showers over the local waters in the night hours. On Monday, a drier mass is expected to filter into the region. Therefore, mostly fair weather conditions are expected to prevail for most of the forecast area. A surface high pressure will continue to generate moderate to fresh wind flow creating choppy marine conditions for at least Monday over the Atlantic offshore waters.
SHORT TERM. Tonight through Tuesday As the tropical wave departs the area, conditions are expected to improve over the islands. Tonight, however, isolated groups of clouds could drag a few showers over eastern portions of Puerto Rico, as well as over the U.S. Virgin Islands.
The latest satellite-derived precipitable water imagery shows a drier air mass advancing toward the forecast area, with values around 1.4 to 1.5 inches. Additionally, visible imagery from GOES- EAST as well as model data are showing that Saharan dust will be embedded within this air mass. At the low and mid-level, high pressure will promote a stable weather pattern through Tuesday. However, as is usual, patches of moisture may move from time to time, resulting in passing showers over the eastern half of the region. Then, in the afternoon, due to local effects, additional activity might develop over the interior and western half of Puerto Rico. Due to the lack of upper level support, widespread significant activity is not anticipated, although locally heavy showers cannot be ruled out over western Puerto Rico each afternoon.
LONG TERM. Wednesday through Sunday . From previous dis. 432 AM Sunday 12 2020
Drier air with suspended Saharan dust will continue on Wednesday across the region, but moisture will continue at lower levels. A surface high pressure north of the region will cause northeast winds and this will favor showers over west/southwest Puerto Rico on Wednesday afternoon. Moisture increases during the second half of the workweek as a retrogressing TUTT and an induced low- level perturbation enters the eastern Caribbean and moves across the region. This will also cause winds to turn more from the east to southeast, to favor afternoon convection on Thursday and Friday over northwestern PR and from streamers developing off the USVI and over eastern PR. Another weak easterly perturbation is expected to move during the weekend.
AVIATION. VFR conds expected across the local terminals for the rest of today. However, VCSH is expected through 12/22Z at TJSJ, TIST, and TISX. VCTS is expected at TJBQ after 12/18Z, and a TEMPO TSRA has been added to the TAF until 12/21Z, as TSRA may cause MVFR conds. Winds will be from the east at around 10 to 15kt with gusts and sea breeze variations through 12/22Z. Weather improving thereafter, with VFR conds prevailing. Winds will decrease overnight to around 10KT or less.
A surface high pressure located at the north central Atlantic will continue to generate a moderate to fresh easterly wind flow. Therefore, choppy marine conditions are expected over the Atlantic offshore waters of the region tonight. On Monday, a gradually improve is expected in the marine conditions with seas up to 6 feet and winds up to 15 knots. Tranquil marine conditions are expected for the rest of the week.
PRELIMINARY POINT TEMPS/POPS. SJU 90 79 91 80 / 50 30 20 30 STT 89 82 90 80 / 40 20 30 20
SJU WATCHES/WARNINGS/ADVISORIES. PR . None. VI . High Rip Current Risk until 6 PM AST this evening for St Croix.
AM . None.
SHORT TERM . ERG LONG TERM . 99 PUBLIC DESK . LIS
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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.
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Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for (18,4,5,8)(on/off)  Help
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