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Marine Weather and Tides Santa Isabel, 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 6:06AM

Sunset 6:58PM

Saturday August 8, 2020 4:57 AM AST (08:57 UTC)

Moonrise 10:26PM

Moonset 10:09AM

Illumination 81%

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 Santa Isabel, PR

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Area Discussion for - San Juan, PR

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FXCA62 TJSJ 080843 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 443 AM AST Sat Aug 8 2020

SYNOPSIS.

A mid-to-upper level ridge will build and hold aloft through the upcoming week. A dry air mass with African dust particles will limit shower activity and produce hazy skies the next few days. However, overnight and early morning showers across the windward sections followed by afternoon convection across the western sections will affect the islands each day. Warm to hot temperatures will persist through the next few days. The next tropical wave is forecast to arrive by the middle of next week.

SHORT TERM. Today through Monday

The weak and fast-moving tropical wave from yesterday is now moving out of the region, and precipitable water values are now dropping. Isolated showers will continue out over the local waters for the next few hours. Winds behind the tropical wave are fairly breezy, and regional buoys are currently seeing this increase in wind speeds. Winds of 10 to 20 knots are expected today from the east.

High pressure currently extends from the lower to upper atmosphere over the western to central Atlantic, and this feature will play a primary role in our weather the next few days. Furthermore, forecast model soundings show that this ridging will really dry out the mid- levels of the atmosphere, thus creating hostile conditions for shower development. The soundings also show warming temperatures at low to mid levels, which also works against showers. Below average precipitable water values are expected today through Monday, generally ranging from 1.3 to 1.6 inches. Finally, mild to moderate amounts of Saharan dust are moving in, and will be with us for the next few days.

To sum up these conditions, the next few days looks quite calm across the region with drier than normal conditions. Very little shower activity is expected today over land, with the best chance being over western Puerto Rico near Mayaguez in the afternoon. Only fairly weak showers are expected. Tomorrow and Monday some low-level moisture moves in from the west, yet given the effects of the ridging, only minimal impacts are expected. Showers will continue to favor western to northwestern Puerto Rico, and these showers will likely be weak. Despite generally unfavorable conditions for strong showers, persistent weak showers over a given area can lead to water ponding. Isolated showers are possible over the local waters, and may impact areas near the coast in eastern Puerto Rico in the nighttime and morning hours.

LONG TERM. Tuesday through Sunday

A mid level high pressure is forecast to be the dominant weather feature through much of the work-week. This feature will promote a dry air mass at mid level, and a persistent trade wind cap. However, a weak tropical wave is now forecast to reach the islands by Wednesday afternoon into the evening. This tropical system will provide the best chance for shower and thunderstorm development across the islands, but doesn't look so impressive at this time.

For the end of the long-term period, which increase the amount of uncertainty about this solution, a more robust tropical wave will provide a better chance for inclement weather across the islands late Friday night or Saturday.

Generally speaking, a seasonal weather pattern will persist across the islands with overnight and early morning showers moving across the local waters and windward sections, followed by afternoon convection over the western portions of the islands. Maximum temperatures will continue in the low 90s mainly over the urban and coastal areas with heat indices from the upper 90s to mid 100s.

AVIATION.

VFR conds are expected to prevail at all terminals for the next 24 hrs. Brief MVFR in SHRA/TSRA psbl btwn 08/17-21Z in wrn PR. Sfc winds E less than 11 kts, bcmg 10-20 kt after 08/14Z, strongest near the coast where sea breezes will influence.

MARINE.

Mariners can expect choppy seas across the Caribbean waters and passages due to a wind surge. Small craft operators should exercise caution across most of the local waters due to winds between 15 and 20 knots. Seas will range between 2 and 5 feet. Early next week, mariners can expect tranquil marine conditions, but local effects will accelerate winds across the Caribbean and Atlantic waters between 15 and 20 knots at times, especially during the afternoon hours. A tropical wave will move across the local waters by the middle of next week, increasing winds and seas, and deteriorating weather conditions.

PRELIMINARY POINT TEMPS/POPS. SJU 90 79 90 79 / 50 30 20 10 STT 90 80 90 80 / 50 10 20 20

SJU WATCHES/WARNINGS/ADVISORIES. PR . None. VI . None. AM . None.

SHORT TERM . mb LONG TERM . CAM

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
42085 - Southeast of Ponce, PR	10 mi	118 min	ENE 16 G 19	85°F	85°F		1016.1 hPa (-1.5)
JOXP4 - Jobos Bay Reserve, Puerto Rico	10 mi	73 min	ENE 2.9	82°F			1019 hPa	75°F
MGIP4 - 9759110 - Magueyes Islands, PR	34 mi	58 min	ESE 1.9 G 4.1	82°F	85°F		1017.6 hPa (-0.6)
SJNP4 - 9755371 - San Juan, PR	36 mi	58 min	E 9.9 G 14	83°F	85°F		1018 hPa (-1.0)
41053 - San Juan, PR	38 mi	118 min	ESE 14 G 16	84°F	84°F		1016.7 hPa (-1.4)
MGZP4 - 9759394 - Mayaguez, PR	43 mi	58 min		77°F	86°F		1018.3 hPa (-0.4)

Wind History for Penuelas (Punta Guayanilla), 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 Playa Cortada, Puerto Rico

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Tide / Current Tables for Playa de Ponce, 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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