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Marine Weather and Tides Guayama, PR Version 3.4

NOTICE 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.

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Sunrise 6:05AM

Sunset 6:51PM

Saturday August 15, 2020 4:34 AM AST (08:34 UTC)

Moonrise 2:32AM

Moonset 4:07PM

Illumination 13%

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.

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7 Day Forecast for Marine Location Near Guayama, PR

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Area Discussion for - San Juan, PR

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FXCA62 TJSJ 150139 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 939 PM AST Fri Aug 14 2020

UPDATE. Showers will continue to move across the windward sections overnight and until the arrival of subsidence ahead of Josephine. This area of subsidence will limit shower activity, but the moisture field associated with Josephine will increase the potential of having squally-weather across the islands, especially around noon. However, based on the latest Tropical Cyclone Advisory, Josephine is forecast to pass well off to the north of the islands over the weekend.

AVIATION. In general, VFR conditions will prevail through the forecast period. Quick passing SHRA/-SHRA remains possible across JSJ/IST/JBQ/ISX/NCM/KPK overnight. The external bands of Josephine and local effects will produce SHRA/TSRA across the USVI, as well as along the mountains and the E/W sections of PR between 15/16-23z. Winds are forecast from the E-NE at less than 10 knots, increasing at 10-20 knots after 15/13z.

MARINE.

Mariners can expect choppy seas up to 6 feet due to winds between 15 and 20 knots. Tropical Storm Josephine will deteriorate the Atlantic Offshore waters but will track off to the north of the area. Therefore, a Small Craft Advisory is in effect for the Atlantic Offshore waters tomorrow night.

PREV DISCUSSION. /issued 425 PM AST Fri Aug 14 2020/

SYNOPSIS .

Tropical Storm Josephine will pass far to our north over the weekend. However, some moisture associated with the system will produce shower activity across the region for tomorrow and Sunday. Marine conditions will become choppy as well over the outer Atlantic waters due to the storm. Multiple tropical waves are expected for the next workweek.

SHORT TERM . Rest of Today through Sunday .

Currently a high pressure ridge exists at mid to upper levels over the western Atlantic, with its associated high surface pressure over the same area. Enhanced near-surface pressure gradients associated with the surface high are driving breezy winds across the region today, and more especially tonight over the local waters of up to 20 knots. The ridge aloft is driving subsidence and warmer temperatures aloft, where the 12z sounding recorded -4.5C at 500mb. Given these conditions, thunderstorms have had a hard time developing this afternoon. A patch of moisture has been impacting the area this afternoon, bringing scattered to numerous showers over the USVI, with more activity over southwestern Puerto Rico due to the west-northwesterly wind flow. These showers will continue for the next few hours, then die down over land and continue over the local waters.

Though Tropical Storm Josephine will pass well to our north this weekend, we will still be impacted a bit by some moisture associated with the storm. Before that moisture arrives, one more patch of moisture will pass through overnight, producing scattered showers across the local waters, the USVI, and near the coast of eastern Puerto Rico. After that patch of moisture moves through, the next wave of moisture, this one associated with Josephine, is expected to move at least near our region Saturday during the daytime and into the nighttime. Forecast models are trending towards pushing most of the moisture to our north, yet an increase in shower activity is at least likely for the USVI and the Atlantic waters during this period. Given that most of this moisture is expected to not reach us, and with the ridge still in place, only moderate shower activity and probably no thunderstorms are expected in western Puerto Rico for tomorrow afternoon. Another wave of moisture being pulled up from the south by Josephine is expected for late Sunday, and that will also help to increase showers. However, we will still be under the influence of the ridge, so much of Saturday and Sunday we should see fair weather conditions. When the aforementioned areas of moisture move in, the large-scale ridging should suppress thunderstorm activity and make the showers less impactful.

LONG TERM . Monday through Saturday .

PREV DISCUSSION . /issued 407 AM AST Fri Aug 14 2020/

On Monday, moisture associated with Tropical Storm Josephine combined with a relatively weak wave will stream across the area. As such, an increase in shower activity is anticipated across the region, with afternoon showers and thunderstorms, especially in northwestern Puerto Rico. Behind the wave is a large area of disorganized patches of moisture, which are anticipated to affect the area of Tuesday. Moisture is likely to decrease late in the day, however. A typical pattern is likely on the day, with shower activity becoming more inhibited in the evening. This is due to a small area of dry air ahead of another wave.

Late on Tuesday night, a vigorous tropical wave is forecast to make its way into the area. Significantly higher moisture levels are anticipated, and shower activity is likely to be fairly widespread. The wave will linger over the area into Thursday. Once again, a drier air mass is expected to move in ahead of the next wave mid- morning on Thursday through the afternoon. The next wave is forecast to arrive overnight on Thursday night into Friday, and this one is also expected to be fairly vigorous. Another surge of moisture across the area will lead to an increase in showers. Widespread afternoon showers with isolated thunderstorms are anticipated for Friday, with the peak in activity in western and interior Puerto Rico. This will be followed by enhanced passing shower activity during the night.

On Saturday, disorganized patches of moisture will help to sustain shower activity across the area. Late in the day yet another tropical wave is forecast to approach the area. So, on the whole, next week is currently looking to be fairly repetitive.

AVIATION .

SHRA to increase over PR from NE to SW corners. Isold TSRA SW PR. Sct SHRA to cont byd 15/02Z. Some mtn obscurations to dvlp drg the period. Conds improving 15/10-16Z. Sfc winds E 10-20 kt with sea breeze influences bcmg E less than 10 kt aft 14/23Z. Max winds WSW-WNW 26-36 kt btwn FL400-460 diminishing aft 14/18Z.

MARINE .

Winds will be up to 20 knots across the local waters tonight, so small craft operators should exercise caution. Choppy marine conditions are expected over the outer Atlantic waters for the next few days as Tropical Storm Josephine passes to our north. Seas up to 7 feet are possible at the event peak, which is expected late Saturday. After Josephine passes through, more tranquil marine conditions are expected early next week.

PRELIMINARY POINT TEMPS/POPS. SJU 79 89 78 93 / 50 50 50 30 STT 80 88 80 90 / 50 40 50 40

SJU WATCHES/WARNINGS/ADVISORIES. PR . None. VI . None. AM . Small Craft Advisory from 8 PM Saturday to 8 AM AST Sunday for Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N.



SHORT TERM . CAM LONG TERM . GL PUBLIC DESK . LIS

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
JOXP4 - Jobos Bay Reserve, Puerto Rico	7 mi	109 min	N 1.9	79°F			1013 hPa	74°F
42085 - Southeast of Ponce, PR	23 mi	94 min	ENE 14 G 18	83°F	85°F	3 ft	1010.5 hPa (-1.1)
ESPP4 - 9752695 - Esperanza, PR	35 mi	52 min	NE 1.9 G 4.1		85°F		1011.6 hPa
SJNP4 - 9755371 - San Juan, PR	37 mi	46 min	ESE 4.1 G 6	81°F	85°F		1011.6 hPa
41053 - San Juan, PR	38 mi	64 min	SE 5.8 G 7.8	82°F			1010.5 hPa
41056	41 mi	94 min	E 12 G 16	83°F	85°F	3 ft	1010.5 hPa (-1.5)
CLBP4 - 9752235 - Culebra, PR	49 mi	46 min		82°F	85°F		1011.2 hPa

Wind History for Yabucoa Harbor, PR

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure

Link to 5 minute data for TJPS

Wind History from JPS (wind in knots)

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Tide / Current Tables for Arroyo, Puerto Rico

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Tide / Current Tables for Punta Tuna, Puerto Rico

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Weather Map

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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

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Wind Forecast for (4,6,7,8)

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Ground Weather Radar Station Puerto Rico,Virgin Islands

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