Wednesday, April8, 2020
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Marine Weather and Tides
Esperanza, 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.

Sunrise 6:09AMSunset 6:39PM Wednesday April 8, 2020 1:29 PM AST (17:29 UTC) Moonrise 7:28PMMoonset 6:41AM Illumination 99% Phase: Full Moon; Moon at 16 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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AMZ725 Coastal Waters Of Southern Usvi Vieques And Eastern Puerto Rico Out 10 Nm- 958 Am Ast Wed Apr 8 2020
Rest of today..Northeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Scattered showers.
Tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Thursday..South winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
Thursday night..Southeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
Friday..Southeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 12 seconds. Isolated showers.
Saturday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 11 seconds. Isolated showers.
Sunday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
AMZ700 958 Am Ast Wed Apr 8 2020
Synopsis for puerto rico and the uS. Virgin islands waters... Gentle to moderate easterly to southeasterly winds continue across the local waters. This, combined with a slowly fading northerly swell, will help to maintain choppy seas for the atlantic waters and Mona passage, though conditions are generally improving. A weakening frontal boundary is traversing the region today, and will aid in continuing shower activity, mostly in the atlantic waters, and especially in the nearshore waters.


7 Day Forecast for Marine Location Near Esperanza, PR
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location: 18.12, -65.46     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 081518 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 1118 AM AST Wed Apr 8 2020

UPDATE.

Widespread showers have continued this morning, with significant rainfall observed in the metro area having caused local flooding. This is associated with moisture convergence over the region due to the remnants of a frontal boundary traversing the area. The SJU 12Z upper air sounding observed precipitable water levels to be at 1.92 inches. The showers have subsided over the island for now during the last couple of hours. However, a resurgence in shower activity is expected this afternoon; sufficient moisture persists to help aid in the development of showers due to local and diurnal effects. The peak in shower activity is expected to be interior Puerto Rico, stretching to northern Puerto Rico, and there is a moderate risk of flooding from these showers.

AVIATION UPDATE.

BKN/OVC skies with CIGS at around FL060 expected across most of the local terminals today. SHRA over the local area will cause VCSH across most of the local terminals with TEMPO MVFR possible as the SHRA affects the terminals. TJSJ, TJMZ, and TJBQ could observe TEMPO MVFR conds this afternoon, while TIST can observe MVFR conds late this afternoon in the the evening. Winds from the SE to NE at 10-15 knots through 08/23Z, becoming lighter thereafter.

MARINE UPDATE.

Gentle to moderate winds continue out of the east, veering more southeasterly during the day today. Showers also continue, especially across the Atlantic waters and local passages. Seas are gradually subsiding; wave heights up to 6 feet are possible in the Mona Passage, but elsewhere, seas are expected to remain around 5 feet or less. Furthermore, there remains a high risk of rip currents at beaches along the northwest to northeast coasts of Puerto Rico as well as Culebra.

PREV DISCUSSION. /issued 453 AM AST Wed Apr 8 2020/

SYNOPSIS . Moisture associated with a weak frontal boundary continue across the area. This will result in passing showers across the area in the morning hours specially across northern and eastern sections of Puerto Rico. Them in the afternoon hours, scattered to numerous showers will affect the interior and northwestern sections of Puerto Rico. Urban and small stream flooding still possibles with the heaviest showers. Drier weather is anticipated for Friday and continue for the rest of the weekend. Across the regional waters, seas up to 6 feet across the Atlantic waters, therefore small craft operators should exercise caution.

SHORT TERM . Today through Friday .

Abundant low-level moisture associated with an old frontal boundary continues situated over the area. This has resulted in scattered to numerous showers across the northern and eastern portions of Puerto Rico during the overnight hours. Showers will continue to affect these areas through the morning hours. Then, during the afternoon hours, as the available moisture combines with diurnal heating and sea breeze convergence, scattered to numerous showers are expected across portions of interior, western, and the northern half of Puerto Rico. Once again, the low-level flow remains very light and thus, slow-moving showers are expected. Therefore, the potential is there for urban and small stream flooding to materialize in areas in areas that a prolonged period of heavy rainfall activity. Across the USVI, scattered showers are expected from time to time, especially across Saint Thomas and Saint John. The activity across these areas may result in ponding of water on roadways and in poor-drainage areas.

Weather conditions are expected to improve for both Thursday and Friday as the old frontal boundary and its associated moisture lifts to the northeast and drier air moves over the area under a southerly flow. Therefore, more limited shower activity is expected. However, some afternoon showers are still expected to develop across interior and northern portions of Puerto Rico due to local and diurnal effects. Due to the southerly flow, high temperatures along the urbanized areas of northern Puerto Rico may top out in the lower 90s both days

LONG TERM . Saturday through Thursday .

On Saturday, a drier mas mass is expected to move across the region limiting the afternoon convection. However, some passing showers could develop across across western and interior sectors of Puerto Rico. These southeasterly wind flow is expected to result in warmer temperatures across the coastal areas of northern Puerto Rico. On Monday, the wind flow change from east to northeast pushing fragments of low-level moisture across the region. . Afternoon development should be focused over the interior and western sections of Puerto Rico.

On Tuesday to Wednesday, a building high pressure located in the northeastern Atlantic will carry some low-level moisture across the region. This moisture in combination with the local effects can result in more shower activity across the main island, especially in the afternoon hours due to the diurnal heating. For the U.S. Virgin Islands, some passing showers still possible in the morning hours. For Thursday, GFS model guidance suggest a little less moisture across the region, that said, less chance of shower activity could be possible.

AVIATION . Sct SHRA expected across eastern PR and the northern USVI through at least 08/14z, resulting in VCSH mainly across TJSJ/TIST. SHRA expected across interior and northern PR as well as across the northern USVI from 07/16z through 08/23Z. This will result in VCSH across TJMZ/TJBQ/TJSJ/TIST. MVFR conditions will be possible if SHRA affect the terminal sites. Winds will be from the E- ENE below 10 kts through 08/12z, increasing to 12 to 18 kts with sea breeze variations after 08/14z.

MARINE . Across the regional waters, seas between 4 to 6 feet across the Atlantic waters. Therefore, small craft operators should exercise caution especially over the Atlantic waters and Mona passage. Over the Caribbean waters, seas between 2 to 5 feet are expected. A slowly weakening frontal boundary will aid in maintaining showers mainly across portions of the nearshore Atlantic waters and local passages.

expected to continue for the next few days with winds up to 10 knots or less. There is a moderate risk of rip currents at north- facing beaches, with generally low risk elsewhere.

PRELIMINARY POINT TEMPS/POPS. SJU 85 76 90 76 / 50 50 40 20 STT 86 76 84 77 / 50 40 20 10

SJU WATCHES/WARNINGS/ADVISORIES. PR . High Rip Current Risk until 6 PM AST this evening for Culebra- North Central-Northeast-Northwest-San Juan and Vicinity- Southeast.

VI . None. AM . None.

SHORT TERM . JA LONG TERM . CRS PUBLIC DESK . ICP


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ESPP4 - 9752695 - Esperanza, PR 2 mi60 min ESE 12 G 14 85°F 83°F1015.4 hPa
41056 10 mi90 min E 12 G 14 81°F 82°F4 ft1014.6 hPa (+0.0)
CLBP4 - 9752235 - Culebra, PR 15 mi60 min 88°F 83°F1015.1 hPa
CHAV3 - 9751639 - Charlotte Amalie, VI 32 mi60 min 83°F 1015.4 hPa
LAMV3 41 mi60 min 81°F 83°F
41053 - San Juan, PR 42 mi90 min E 12 G 14 79°F 80°F4 ft1015 hPa (+0.0)
JOXP4 - Jobos Bay Reserve, Puerto Rico 42 mi105 min E 8 86°F 1017 hPa75°F
SJNP4 - 9755371 - San Juan, PR 42 mi60 min ENE 9.9 G 14 78°F 83°F1015.9 hPa
CHSV3 - 9751364 - Christiansted Harbor, Virgin Islands 48 mi60 min E 6 G 11 86°F 81°F1014.6 hPa
LTBV3 - 9751401 - Lime Tree Bay, VI 48 mi60 min SE 8 G 11 85°F 84°F1016.1 hPa

Wind History for Isabel Segunda, Vieques Island, PR
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Airport Reports
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Tide / Current Tables for Vieques Island, Puerto Rico
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
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Wed -- 01:53 AM AST     -0.00 knots Slack
Wed -- 05:13 AM AST     -0.95 knots Max Ebb
Wed -- 06:10 AM AST     Sunrise
Wed -- 06:41 AM AST     Moonset
Wed -- 08:37 AM AST     0.00 knots Slack
Wed -- 11:27 AM AST     0.70 knots Max Flood
Wed -- 02:23 PM AST     -0.00 knots Slack
Wed -- 05:24 PM AST     -0.73 knots Max Ebb
Wed -- 06:37 PM AST     Sunset
Wed -- 07:28 PM AST     Moonrise
Wed -- 08:18 PM AST     0.00 knots Slack
Wed -- 11:35 PM AST     0.91 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map
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wmap_A
GEOS Local Image of Puerto Rico    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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (13,3,4,5)
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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.