Monday, June21, 2021
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Marine Weather and Tides
Culebra, PR

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 5:43AMSunset 6:59PM Monday June 21, 2021 3:42 AM AST (07:42 UTC) Moonrise 3:50PMMoonset 2:41AM Illumination 86% Phase: Waxing Gibbous; Moon at 11 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- 927 Pm Ast Sun Jun 20 2021
.small craft should exercise caution...
Rest of tonight..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Isolated Thunderstorms late in the evening. Numerous showers through the night.
Monday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers.
Monday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers.
Tuesday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Scattered showers in the morning, then isolated Thunderstorms in the afternoon.
Tuesday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Scattered showers.
Wednesday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Scattered showers.
Thursday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Scattered showers.
Friday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Scattered showers and isolated Thunderstorms.
AMZ700 927 Pm Ast Sun Jun 20 2021
Synopsis for puerto rico and the uS. Virgin islands waters... Surface high pressure across the north-central atlantic will continue to result in moderate to fresh easterly winds through early in the week. This will result in choppy seas, especially across the offshore waters. Shower and Thunderstorm activity is expected across the local waters late tonight through Monday morning as the tropical wave gradually exits the region.


7 Day Forecast for Marine Location Near Culebra, PR
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location: 18.02, -64.67     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 210139 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 939 PM AST Sun Jun 20 2021

UPDATE. The tropical wave is passing throught the local area, causing scattered to locally numerous showers across the local area, especially across the northern and eastern sections of Puerto Rico. The shower activity is expected to continue overnight as the moisture associated with the tropical wave continues to increase. The available moisture increase will level off on Monday morning and then decrease slightly during the day. However, there will be enough moisture on Monday afternoon to help in the development of showers and thunderstorms across western PR.

AVIATION. VCSH expected across the local terminals during the overnight hours. Winds will be from the east at around 10 knots or less. TSRA will develop across central and western PR after 21/17Z, which may affect the vicinity of TJPS and TJBQ. Winds will be easterly after 21/13Z but with sea breeze variations at around 15 knots with occasional gusts.

MARINE. No changes from the previous discusion. Seas will be up to 6 feet and winds up to 20 knots overnight. Moderate risk of rip currents across the local beaches, but a low risk across western and south central PR.

PREV DISCUSSION. /issued 412 PM AST Sun Jun 20 2021/

SYNOPSIS . A tropical wave is expected to continue developing shower activity across the area through late tonight with lingering effects by Monday afternoon. A seasonal weather pattern is expected for the workweek, with another tropical wave reaching the area by Friday and Saturday. Choppy marine conditions will continue through at least Tuesday.

SHORT TERM . Tonight through Tuesday .

East southeasterly trades induced by a surface high pressure across north-central Atlantic will prevail throughout the short-term forecast. GOES-16 showed precipitable water values over 2.0 inches over Puerto Rico and USVI associated with a passing tropical wave. This combined with an upper-level trough located across Hispaniola and the aid of diurnal heating and local effects produced steamer-like shower and thunderstorm activity across interior, northwest and north central Puerto Rico as well as showers downwind of the local islands into the regional waters. Showers and thunderstorms will continue to develop throughout the afternoon as the tropical wave moves westward. However, some disagreements exist with global and HiRes models on the strength of this activity as the afternoon progresses and how fast the tropical wave will exit our region. Looking at satellite imagery, it seems that a slight decrease in shower activity is expected by early evening and another round of showers and thunderstorm activity will develop late tonight this time affecting mainly east and southeast Puerto Rico as well as the USVI.

Monday is expected to be less active as the tropical wave exits our region and drier air accompanied by Saharan Dust Particulates moves in. Aloft, a weak ridge is anticipated to settle over the forecast area making upper-level conditions to be slightly less conducive for convection. However, lingering moisture from the tropical wave could maintain PWAT values at normal levels. In combination with diurnal heating and sea breeze convergence, localized shower and maybe isolated thunderstorm activity could develop mainly over the interior and western Puerto Rico in the afternoon. Showers over the San Juan metropolitan area cannot be ruled out. On Tuesday an upper level cut-off low to our northeast will extend a trough to its west and stall east of the U.S. Virgin Islands. This, and patches of good low-level moisture, will allow shower activity across the area to continue in a seasonable manner.

LONG TERM . Wednesday through Monday .

PREV DISCUSSION . /issued 456 AM AST Sun Jun 20 2021/

A mid-level ridge over the western Caribbean will begin to weaken, while an upper level low digs from the northeast. However, the ridge will still promote dry air in the mid levels, with moisture being trapped at the lower levels of the atmosphere. On the other hand, very shallow areas of clouds should be advected by the trade winds over the area from time to time, which should result in a typical pattern of passing morning showers over eastern PR/USVI, followed by afternoon activity over western Puerto Rico, and downstream from the isles toward the west.

By Friday and Saturday, an approaching tropical wave will work to increase moisture across the islands. There is some uncertainty in the forecast, since the GFS is keeping most of the moisture field associated with the wave over the Caribbean waters, but the ECMWF brings the bulk of the system over the area, especially late Friday and on Saturday. Regardless, a period of increased shower and thunderstorm activity can be anticipated. After the passage of this wave, another layer of dry air with suspended Saharan dust should arrive to the area, limiting the potential for showers, then followed by a weaker wave that could reach the area by Monday.

AVIATION . Tempo MVFR conditions expected thru 22z across TJBQ due to TSRA. MTN top obscd across central PR and streamers causing mainly VCSH/VCTS across the rest of the terminals of all the islands. VFR conds expected late tonight in general across the region. Low level winds ESE at 10-20 kts.

MARINE . Choppy seas up to 6 feet expected across the Atlantic and eastern waters of the islands due to 15-20 kt trades. There is a moderate risk of rip currents across all the islands. A tropical wave will continue to move westward across the region resulting in shower and thunderstorm activity across the local waters.

PRELIMINARY POINT TEMPS/POPS. SJU 78 87 79 88 / 60 50 60 50 STT 78 88 77 89 / 60 50 50 50

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

SHORT TERM . JA LONG TERM . CVB PUBLIC DESK . GL


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41052 - South of St. John, Virgin Islands 17 mi43 min E 18 G 23 83°F 82°F5 ft1016.8 hPa (-1.6)
CHSV3 - 9751364 - Christiansted Harbor, Virgin Islands 19 mi73 min ENE 4.1 G 8.9 82°F 83°F1017.7 hPa
LAMV3 21 mi73 min 82°F
LTBV3 - 9751401 - Lime Tree Bay, VI 23 mi73 min ESE 8.9 G 16 82°F 84°F1018.7 hPa
CHAV3 - 9751639 - Charlotte Amalie, VI 25 mi73 min 81°F 1018.1 hPa
CLBP4 - 9752235 - Culebra, PR 39 mi73 min 80°F 83°F1018.2 hPa
ESPP4 - 9752695 - Esperanza, PR 43 mi73 min E 8.9 G 13 83°F1018.5 hPa
41056 45 mi43 min E 14 G 18 82°F 82°F4 ft1017.3 hPa (-1.6)

Wind History for Christiansted Harbor, St Croix, VI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR76 mi47 minESE 610.00 miFair80°F74°F82%1018.2 hPa

Link to 5 minute data for TJSJ

Wind History from JSJ (wind in knots)
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Tide / Current Tables for Christiansted, St. Croix Island, Virgin Islands
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Christiansted
Click for Map
Mon -- 01:47 AM AST     0.72 feet High Tide
Mon -- 02:41 AM AST     Moonset
Mon -- 05:44 AM AST     Sunrise
Mon -- 09:50 AM AST     -0.24 feet Low Tide
Mon -- 03:49 PM AST     Moonrise
Mon -- 06:22 PM AST     0.88 feet High Tide
Mon -- 06:56 PM AST     Sunset
Mon -- 11:20 PM AST     0.74 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.70.70.70.60.50.30.1-0.1-0.2-0.2-0.2-0.10.10.30.50.70.80.90.90.80.80.80.7

Tide / Current Tables for St. Croix, Lime Tree Bay, Virgin Islands
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St. Croix
Click for Map
Mon -- 02:41 AM AST     Moonset
Mon -- 05:45 AM AST     Sunrise
Mon -- 10:09 AM AST     -0.07 feet Low Tide
Mon -- 03:49 PM AST     Moonrise
Mon -- 06:56 PM AST     Sunset
Mon -- 09:19 PM AST     0.79 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.60.50.40.40.30.20.10-0-0.1-0.1-00.10.20.30.40.50.60.70.80.80.80.8

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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