Tuesday, September28, 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 6:08AMSunset 6:11PM Tuesday September 28, 2021 10:57 PM AST (02:57 UTC) Moonrise 11:42PMMoonset 12:30PM Illumination 48% Phase: Third Quarter Moon; Moon at 22 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- 857 Pm Ast Tue Sep 28 2021
Rest of tonight..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Scattered showers.
Wednesday..East winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. East swell around 4 feet in the afternoon. Scattered showers.
Wednesday night..Northeast winds 5 to 10 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 11 seconds. East swell 4 to 5 feet. Isolated showers.
Thursday..Northeast winds 5 to 10 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 11 seconds. East swell 4 to 5 feet. Scattered showers.
Thursday night..East winds 5 to 10 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 11 seconds. Northeast swell 4 to 5 feet. Scattered showers.
Friday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Isolated showers.
Saturday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Scattered showers and isolated Thunderstorms.
Sunday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Scattered showers.
AMZ700 857 Pm Ast Tue Sep 28 2021
Synopsis for puerto rico and the uS. Virgin islands waters... Light to gentle easterly winds, and seas of 5 feet or less will continue across the regional waters through early Wednesday. Deteriorating and hazardous seas are expected by late Wednesday night through Friday, due to swells generated by major hurricane sam. The official forecast from the national hurricane center has sam passing well to the northeast of the islands by Thursday. Passing showers will continue from time to time over the local waters.


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 290014 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 814 PM AST Tue Sep 28 2021

UPDATE. After an active afternoon of strong shower and thunderstorm activity across interior and western Puerto Rico, weather conditions are gradually improving across the local area. However, an area of heavy showers continues across portions of the municipalities of Toa Baja and Catano. The activity across this area should diminish within the next couple of hours.

For overnight tonight into tomorrow morning, isolated to locally scattered shower activity, mostly brief, are expected from time to time across the local waters with some of the activity moving onshore across the eastern third of Puerto Rico and possibly across portions of the USVI. No significant rainfall accumulations are expected. Another very active afternoon is expected once again tomorrow for interior and western Puerto Rico as the combination of abundant low-level moisture, strong daytime and local effects will result in strong shower and thunderstorm activity. Additional activity cannot be ruled across the San Juan metro area. An upper-level trough will be moving near the area, increasing the instability even further. Thus, thunderstorm activity will likely be more numerous. The steering flow will continue to be light, less than 10 knots, causing the activity to move slowly. Thus, the threat of urban and small stream flooding as well as mudslides in areas of steep terrain will remain elevated. Across the USVI, only isolated showers are expected in the afternoon as a patch of drier air will be moving in.

AVIATION. Mainly VFR conditions expected. VCSH will be possible at times during the overnight across TJSJ as well as the USVI and Leeward Islands terminals with no significant impacts to operations expected. SHRA/TSRA activity expected across interior and western PR between 29/16Z and 29/23Z, resulting in VCSH and VCTS across the PR terminals. Winds will be light and variable overnight, increasing to around 8-12 kts from the E with sea breeze variations after 29/14Z.

MARINE. Mainly tranquil marine conditions with seas of up to 5 feet expected across the regional waters through Wednesday afternoon. Conditions will begin to deteriorate by Wednesday night into early Thursday as swells from Hurricane Sam, expected to pass well east and northeast of the area, begin to affect the Atlantic waters and Anegada Passage. A low risk of rip currents is expected during the day on Wednesday across all of the beaches with the exception of the eastern tip of St. Croix, where the rip current risk will be moderate.

PREV DISCUSSION. /issued 504 PM AST Tue Sep 28 2021/

SYNOPSIS . A really active afternoon were observed with scattered to numerous showers mainly over the interior and northwestern municipalities of Puerto Rico. According to the Radar Doppler rainfall accumulations were between 2 to 3 inches. This shower activity is expected to diminish as the day progress and some passing showers over eastern sections of Puerto Rico. Tranquil marine conditions will continue for the rest of today with seas between 3 to 5 feet and winds up to 15 knots.

SHORT TERM . Rest of Today through Thursday . Patches of moisture combined with the diurnal heating and local patterns result in heavy shower activity mainly over interior sections of Puerto Rico. This activity is expected to diminish after sunset and leave a few passing showers mainly over eastern sections of Puerto Rico and local waters. For Wednesday, as the major Hurricane Sam move more to the northeast into the Atlantic Waters a weakness and in the steering winds is forecast to prevail for the following days. As a result, variably conditions are expected, due to an increase in low level moisture with precipitable water values above near normal climatological and a southeastern component in winds. The combination of this low level moisture and the unstable conditions aloft from a deep upper level trough well at our north, will result in afternoon convection over the interior and western sections of PR, as well some section of the San Juan Metro Area. This shower activity is expected to be slow moving, and can result in urban and small stream flooding.

For Wednesday night into Thursday, isolated to scattered showers are possibles over the local waters ans eastern coastal sections of the islands. As the Major Hurricane Sam moves more into to the northeast on Thursday, a dry slot created by the Hurricane will reach the local Islands. This drier airmass could inhibit shower activity, however, some little patches with enough moisture in combination with the local effects could result in showers and thunderstorm activity over the interior sections of Puerto Rico. Given the slow winds conditions the activity will be slow motion and can result in urban and small stream flooding with the persistent and heavy activity.

LONG TERM . Friday through Tuesday . from previous discussion .

As Hurricane Sam lifts further north on Friday, a low-level trough is forecast to develop over the area, and winds are expected to turn from the east-southeast, favoring diurnal convection along the interior and northern slopes of PR. Urban and small stream flooding can be expected with the heaviest showers. The weak southeasterly steering wind flow should promote warmer than normal temperatures. During the weekend, a tropical wave is forecast to cross the region, increasing moisture content and the areal coverage of showers across the islands with isolated thunderstorms expected to develop across the local waters and over portions of the islands each day. Therefore, the flood threat will remain elevated through the weekend.

Moisture content is expected to quickly erode by early next week, as a ridge builds from the east, promoting drier air and more stable conditions. However, typical afternoon convection cannot be ruled out over the western interior of PR, and from streamers downwind of the USVI. Moderate to fresh trade winds are expected to return during this period in response to the building ridge to our northeast.

AVIATION . VFR conds expected to prevail across the local terminals. However, SHRA/TSRA could affect the vicinity the local terminals this afternoon. TJBQ has the highest chance of TSRA between 28/17Z and 28/21Z, but it is also possible at the rest of the local terminals for brief periods. Winds will remain at around 10KT from the SE with sea breeze variations for the rest of the afternoon, becoming light and variable overnight.

MARINE . Across the regional waters, tranquil marine conditions will prevail at least until early Thursday as Major Hurricane Sam lift well to the northeast and create hazardous marine conditions for the Atlantic offshore waters. That said, expected seas between 3 to 5 feet for all the local waters on Wednesday and early Thursday, then seas will build up to 7 feet over the Atlantic waters. Therefore, there is small craft advisory in effect from Wednesday night into Friday. For the rest of today and Tuesday, there is a low risk of rip current for all the local beaches of the forecast area. This conditions will deteriorate the following week as Hurricane Sam move well at the northeast.

PRELIMINARY POINT TEMPS/POPS. SJU 78 89 78 89 / 20 30 40 40 STT 78 88 77 87 / 30 30 40 40

SJU WATCHES/WARNINGS/ADVISORIES. PR . None. VI . None. AM . Small Craft Advisory from 2 AM Thursday to 2 PM AST Friday for Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N.



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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41052 - South of St. John, Virgin Islands 17 mi58 min E 9.7 G 12 86°F 86°F2 ft1012.7 hPa (+1.8)
CHSV3 - 9751364 - Christiansted Harbor, Virgin Islands 19 mi58 min 84°F 86°F1013.9 hPa (+1.8)
LAMV3 21 mi58 min 83°F
LTBV3 - 9751401 - Lime Tree Bay, VI 23 mi58 min 84°F 89°F1014.9 hPa (+1.8)
CHAV3 - 9751639 - Charlotte Amalie, VI 25 mi58 min 83°F 1013.7 hPa (+1.7)
CLBP4 - 9752235 - Culebra, PR 39 mi58 min 84°F 87°F1013.9 hPa (+1.6)
41056 45 mi58 min ESE 7.8 G 9.7 84°F 86°F2 ft1012.1 hPa (+1.9)

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 mi2 hrsN 010.00 miPartly Cloudy81°F72°F74%1013.4 hPa

Link to 5 minute data for TJSJ

Wind History from JSJ (wind in knots)
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Last 24hrSE3CalmCalmCalmCalmCalmCalmCalmS3SE3CalmE84NE10NE11NE12E13NE13E12E10--E7E5Calm
1 day agoE5E4S3CalmCalmS3CalmCalm--CalmCalm6E6E9NE10NE12NE12NE13E12E12E10E9E7SE3
2 days agoE6SE4SE3CalmCalmS3CalmCalmCalmCalmCalmE6NE8NE7NE11NE12E15E12E15E12E11E8--E5

Tide / Current Tables for Christiansted, St. Croix Island, Virgin Islands
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Christiansted
Click for Map
Tue -- 05:47 AM AST     0.27 feet Low Tide
Tue -- 06:08 AM AST     Sunrise
Tue -- 12:29 PM AST     Moonset
Tue -- 04:53 PM AST     1.00 feet High Tide
Tue -- 06:09 PM AST     Sunset
Tue -- 09:58 PM AST     Last Quarter
Tue -- 11:41 PM AST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.60.50.40.30.30.30.30.30.40.50.60.80.90.91111110.90.90.8

Tide / Current Tables for St. Croix, Lime Tree Bay, Virgin Islands
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St. Croix
Click for Map
Tue -- 04:51 AM AST     0.14 feet Low Tide
Tue -- 06:08 AM AST     Sunrise
Tue -- 12:29 PM AST     Moonset
Tue -- 05:09 PM AST     0.88 feet High Tide
Tue -- 06:09 PM AST     Sunset
Tue -- 09:58 PM AST     Last Quarter
Tue -- 11:42 PM AST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.30.30.20.10.10.20.20.30.40.50.60.70.70.80.80.90.90.90.90.80.80.70.6

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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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