Thursday, April22, 2021
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Marine Weather and Tides
Lamboglia, PR

Version 3.4
NOTICE
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 6:01AMSunset 6:44PM Thursday April 22, 2021 10:35 AM AST (14:35 UTC) Moonrise 2:28PMMoonset 2:46AM Illumination 81% 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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AMZ735 Coastal Waters Of Southern Puerto Rico Out 10 Nm- 957 Am Ast Thu Apr 22 2021
.small craft should exercise caution...
Rest of today..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Scattered showers through the day.
Tonight..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. Isolated showers.
Friday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
Saturday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
Sunday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
Monday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
AMZ700 957 Am Ast Thu Apr 22 2021
Synopsis for puerto rico and the uS. Virgin islands waters... Surface high pressure over the central atlantic will continue through the week, though with a brief trough passage on Friday. Moderate to fresh easterly winds will prevail, shifting to east- southeast on Friday, also diminishing slightly. Mostly isolated showers are indicated over the local waters.


7 Day Forecast for Marine Location Near Lamboglia, PR
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location: 17.97, -66     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 221414 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 1014 AM AST Thu Apr 22 2021

UPDATE.

No significant changes to forecast, which is tracking well. Isolated passing showers continue, mostly over the local waters. The patch of enhanced moisture that was over the region yesterday evening into the night is pulling away. Precipitable water was 1.23 inches in the 12Z sounding, down from 1.73 inches at 0Z. Another patch of moisture is approaching from the east/east-southeast, as is evident on imagery from GOES-16, including the TPW product and patches of cloudiness on visible images.

Isolated to scattered showers this afternoon, mostly in the northwest of Puerto Rico, but with additional activity due to streamers in the east. Passing showers again tonight into tomorrow morning.

AVIATION.

Mainly VFR conditions expected across all terminals through the next 24 hours. VCSH after 22/18Z for TJSJ and TJBQ are not expected to cause significant operational impacts. Winds pick up out of the east/east-southeast, at around 10 to 15 knots, with sea breeze variations and locally stronger gusts, to around 25 knots. Overnight tonight, winds diminish, becoming light, and VCSH expected after 23/01Z for TIST, TISX, and TNCM, and continuing for TJSJ, TKPK. For TJPS, VCSH after 22/23Z.

MARINE.

No change to previous discussion. Relatively tranquil seas continue; seas of 5 feet or less for most of the waters, and up to around 6 feet possible for the offshore Atlantic waters. Winds out of the east-southeast at around 15 to 20 knots today, subsiding tonight into tomorrow, to around 5 to 15 knots.

Moderate risk of rip currents for most local beaches.

PREV DISCUSSION. /issued 459 AM AST Thu Apr 22 2021/

SYNOPSIS .

The ridge pattern aloft will weaken as a polar trough moves across the western Atlantic. Easterly winds will return today, shifting more from the southeast on Friday. An advective pattern will dominate the local weather during the next few days, with the arrival between pockets of moist and dry air. Afternoon convection is expected each day, mainly across the mountain and western areas. In the long term, a moist and unstable weather pattern seems possible for the second part of next week.

SHORT TERM . Today through Saturday .

Today, there will remain lingering moisture over the area, with some additional patches of moisture being carried in, embedded in the trade winds. Aloft, the polar trough will weaken the upper level ridge today. Thus, expect partly to variably cloudy skies across the eastern half of Puerto Rico and the US Virgin Islands, with a slight chance for isolated to scattered showers during the early morning hours. Then in the afternoon hours, moisture confined at the low levels, diurnal heating and local effects will aid in the development of showers across interior and northwestern parts of Puerto Rico, as well the San Juan metro area. Streamer-like showers cannot be ruled out downwind from the U.S. Virgin Islands. It is possible that persistent showers over a given area could lead to ponding water on roadways.

Another tropical disturbance is expected to arrive Friday and lingering into Saturday. This will enhance shower activity across the forecast area. Thus, expect a similar weather pattern with showery weather conditions in and around the local islands. Winds will continue to blow from the east at 10-15 mph. Temperatures are expected to be relatively warm, with day temperatures reaching the mid to upper 80s.

LONG TERM . Sunday through Thursday .

A polar trough will move into the western Atlantic late Sunday night and early Monday morning, and then eastward close to the northeast Caribbean by Tuesday. The mid to upper-level trough will then amplify over PR/USVI Wednesday through Friday, increasing instability. In the meantime, a surface-high pressure will build across the Atlantic Ocean north of the Greater Antilles Sunday and Monday. A cold front will then swing eastward across the Western Atlantic, weakening the high pressure. The remnants of the cold front will sink southward near PR/USVI by midweek until it dissipates, enhancing tropical moisture. Another surface-high will build over the Western Atlantic Thursday and onward.

That said, expect the advective pattern to continue Sunday and Monday, which could bring passing showers across the windward sections in PR/USVI during the overnight and morning hours, followed by afternoon convection across the northwest quadrant and interior portions of Puerto Rico. But in general, mostly tranquil weather conditions. However, we will be transitioning to a more unstable weather pattern by Tuesday and onward as the polar trough moves closer and moisture increase across the islands. The potential to observe inclement weather due to thunderstorms, urban and small stream flooding could increase by that time (as long as GFS is correct, which was the model chosen for the long term forecast).

AVIATION .

Mainly VFR conds expected across all terminals drg the next 24 hr prd. Afternoon convection will result in an increase in cloud cover and VCSH in/around TJSJ/TJBQ. Winds will continue from the E at 10-15 knots with higher gusts in sea breeze variations. Winds will become calm to light and variable aft 22/23z. No sig operational wx impacts durg prd at this time.

MARINE .

Small craft operators are urged to exercise caution across most of the local waters due to expected seas up to 6 feet and east winds up to 20 knots. Thereafter, marine conditions will improve with winds around 15 knots and seas below 5 feet; conditions that will hold through the weekend into early next week.

For beachgoers, there is a moderate risk of rip currents for most local beaches.

PRELIMINARY POINT TEMPS/POPS. SJU 88 75 86 75 / 30 50 30 30 STT 86 76 84 74 / 20 40 40 20

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

SHORT TERM . CRS LONG TERM . RAM PUBLIC DESK . GL


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
42085 - Southeast of Ponce, PR 29 mi95 min E 16 G 19 81°F 81°F4 ft1016.4 hPa (+1.4)
ESPP4 - 9752695 - Esperanza, PR 29 mi47 min ESE 12 G 17 80°F1017.9 hPa
SJNP4 - 9755371 - San Juan, PR 34 mi47 min ENE 15 G 19 81°F 81°F1017.6 hPa
41053 - San Juan, PR 35 mi35 min E 14 G 18 81°F 80°F4 ft1016.5 hPa (+0.6)
41056 35 mi35 min ESE 14 G 18 80°F 81°F3 ft
CLBP4 - 9752235 - Culebra, PR 43 mi47 min 84°F 81°F1017.6 hPa

Wind History for Yabucoa Harbor, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

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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Arroyo
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Thu -- 02:46 AM AST     Moonset
Thu -- 06:02 AM AST     Sunrise
Thu -- 08:03 AM AST     0.82 feet High Tide
Thu -- 09:10 AM AST     0.61 feet Low Tide
Thu -- 02:28 PM AST     Moonrise
Thu -- 06:09 PM AST     0.71 feet High Tide
Thu -- 06:42 PM AST     Sunset
Thu -- 08:29 PM AST     0.17 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Punta Tuna, Puerto Rico
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Punta Tuna
Click for Map
Thu -- 02:45 AM AST     Moonset
Thu -- 05:13 AM AST     0.72 feet High Tide
Thu -- 06:01 AM AST     Sunrise
Thu -- 02:27 PM AST     Moonrise
Thu -- 06:42 PM AST     Sunset
Thu -- 09:18 PM AST     0.22 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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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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