Sunday, September19, 2021
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Marine Weather and Tides
Guánica, 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 6:14AMSunset 6:27PM Sunday September 19, 2021 9:14 AM AST (13:14 UTC) Moonrise 5:56PMMoonset 4:58AM Illumination 96% Phase: Waxing Gibbous; Moon at 13 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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AMZ745 Coastal Waters Of Southwestern Puerto Rico Out 10 Nm- 427 Am Ast Sun Sep 19 2021
Today..Northeast winds 5 to 10 knots. Seas 2 feet or less. Dominant period 10 seconds. Isolated Thunderstorms in the afternoon.
Tonight..Northeast winds 5 to 10 knots. Seas 2 feet or less. Dominant period 11 seconds. Isolated showers.
Monday..Northeast winds 5 to 10 knots. Seas 2 feet or less. Dominant period 11 seconds. Isolated Thunderstorms in the afternoon.
Monday night..Northeast winds 5 to 10 knots. Seas 2 feet or less. Dominant period 10 seconds. Scattered showers.
Tuesday..South winds 5 to 10 knots. Seas 2 feet or less. Dominant period 10 seconds. Isolated Thunderstorms. Numerous showers.
Wednesday..Southeast winds 5 to 10 knots. Seas 2 feet or less. Dominant period 8 seconds. Isolated Thunderstorms. Scattered showers.
Thursday..Southeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 12 seconds. Isolated showers.
AMZ700 427 Am Ast Sun Sep 19 2021
Synopsis for puerto rico and the uS. Virgin islands waters... Gentle to moderate east to northeast trade winds will prevail for the next several days. Seas of 4 feet or less are expected across the local waters through tonight. Deteriorating marine conditions, due to the passage of tropical depression sixteen well northeast of the local islands, are expected by early next week. An increase in shower and Thunderstorm activity is also expected for the next several days.


7 Day Forecast for Marine Location Near Gu�nica, PR
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location: 17.97, -66.92     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 190921 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 521 AM AST Sun Sep 19 2021

SYNOPSIS. Scattered showers in the east will turn into showers and isolated thunderstorms in the west, southwest and interior Puerto Rico. Then, on Monday the moisture from newly formed Tropical Storm Peter expected to pass a little more than 300 miles northeast of Rio Grande Puerto Rico at 2 AM AST on Tuesday. This will bring showers and thunderstorms Monday and Tuesday followed by dryer and considerably warmer weather on Wednesday and Thursday followed by warm but generally seasonal conditions thereafter.

SHORT TERM. Today through Tuesday .

The mid to upper level ridge continued to weaken and will shift west of the area as a TUTT low strengthens north/northeast of the region. The TUTT is forecast to sink south and west across the area today and early this week, and this will lead to increasing instability over the region. Induced low level troughiness continued across the region resulting in periods of quick passing trade wind showers along with occasional patches of low level clouds. The combination of available moisture and the gradually increasing instability aloft along with local effects and daytime heating, will all favor afternoon convection mainly over the interior and west to southwest sections of Puerto Rico; with a general steering flow expected to remain out of the east northeast. Less shower activity is expected in and around the U.S. Virgin Islands today but some may develop during the afternoon then gradually increase during the overnight hours. Minor ponding of water on roads and in poor drainage areas will be possible with the heavy rains during the afternoon.

For Monday and into Tuesday the newly formed Tropical Storm Peter is forecast to track northeast of the region based on latest advisory from the National Hurricane Center, as well as model guidance which seem to be in somewhat better agreement today. That said, expect increasing moisture and instability across the region with good potential for enhanced showers and thunderstorm development as the outer bands from the tropical storm moves across the area. That along with the unstable conditions aloft will lead to deteriorating weather conditions across the islands as well as marine conditions.

Based on the latest guidance, Tropical Storm Peter will track northeast of the region, however rainfall amounts between 1 to 3 inches will remain possible across portions of the islands. This will result in a high chance for urban and small stream flooding in some areas. Regardless of development, this system and the unstable conditions aloft are forecast to enhance shower and thunderstorm development across the region during the short term period, as well as deteriorating marine and surf zone conditions through at least Wednesday. For more information regarding Tropical Storm Peter, please refer to the Tropical Storm Peter Advisories (TCPAT1 )issued by the National Hurricane Center, and also stay up to date on the latest local Zone Forecast Products(ZFPPR), Coastal Waters Forecast s(CWFSJU) and Marine Weather Messages (MWWSJU) issued by WFO San Juan PR.

LONG TERM. Wednesday through Sunday .

Tropical Storm Peter is expected to pull away from the area on a generally northwesterly course Wednesday through Friday with some moisture trailing, but just as a ribbon of drier air from subsidence preceded it another ribbon of drier air is expected to follow on Wednesday night. Then alternating wet and dry bands will pull through the area in predominantly southeasterly flow through the end of the period. The GFS shows considerable warming that actually begins today but will reach a peak on Wednesday such that the 1000-850 mb thicknesses move from 1415 meters today to 1426 meters on Wednesday. Thicknesses are not forecast to drop below this Tuesday's level through the next 240 hours even though winds will gradually become east northeasterly again after Sunday. 500 mb temperatures however will begin to fall again on Wednesday and by saturday conditions will be favorable for isolated to scattered thunderstorms in the western and interior portions of Puerto Rico each afternoon, and likely a few thunderstorms over the local waters afterward during the evenings.

AVIATION. VFR conds will prevail thru fcst prd. SCT ocnl BKN lyrs nr FL025 . FL050 with wdly SCT SHRA en route btwn islands and ovr regional waters. VCSH at most of the local terminals except /TJMZ/TJPS TIL 19/13z with brief MVFR and Mtn Top Obscurations ovr Ern PR til 19/12Z due to low clds and SHRA. SFC wnds fm ENE 5-10 KT but incrg to 15 KT with ocnl gusts and sea breeze variations aft 19/14Z. The newly formed Tropical Storm Peter now east of the Northern Leewards is fcst to track NE of the islands based on latest guidance from the National Hurricane Center. This will bring increased cloudiness and chance for showers thunderstorm across the nern Caribbean. Please refer to the latest advisories issued by the National Hurricane Center.

MARINE. Newly formed Tropical Storm Peter will pass northeast of the local area by about 250-300 nm sending swell with a relatively short period of up to 8 feet into the area beginning on Monday in the local outer Atlantic waters. The last of the 7 foot seas should be seen on Tuesday night as TS Peter pulls away. Moderate rip currents are indicated for portions of the northern coasts of Puerto Rico and Culebra, but a high risk is indicated late this week in much the same areas.

PRELIMINARY POINT TEMPS/POPS. SJU 90 78 88 78 / 30 70 60 60 STT 90 77 91 79 / 40 70 70 70

SJU WATCHES/WARNINGS/ADVISORIES. PR . None. VI . None. AM . Small Craft Advisory from 2 PM Monday to 8 AM AST Tuesday for Anegada Passage Southward to 17N.

Small Craft Advisory from 2 PM Monday to 2 AM AST Wednesday for Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N.



SHORT TERM . RAM LONG TERM . WS PUBLIC DESK . ICP


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGIP4 - 9759110 - Magueyes Islands, PR 7 mi56 min N 4.1 G 5.1 82°F 86°F1013.6 hPa
MGZP4 - 9759394 - Mayaguez, PR 21 mi56 min NNE 1.9 G 4.1 84°F 85°F1013.7 hPa
42085 - Southeast of Ponce, PR 22 mi74 min NE 5.8 G 7.8 83°F 2 ft1013.6 hPa (+1.8)
PTRP4 33 mi39 min E 2.9 G 4.1 79°F
41115 - Rincon, Puerto Rico (181) 34 mi48 min 85°F2 ft
AROP4 - 9757809 - Arecibo, PR 37 mi62 min S 1 G 1.9 84°F
JOXP4 - Jobos Bay Reserve, Puerto Rico 37 mi149 min Calm 78°F 1014 hPa71°F
41121 38 mi48 min 84°F3 ft

Wind History for Magueyes Island, 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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Last 24hr--------------------------------------E5NE5NE5--Calm
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Tide / Current Tables for Guanica, Puerto Rico
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Guánica
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Sun -- 04:57 AM AST     Moonset
Sun -- 06:12 AM AST     0.80 feet High Tide
Sun -- 06:16 AM AST     Sunrise
Sun -- 11:06 AM AST     0.15 feet Low Tide
Sun -- 05:55 PM AST     Moonrise
Sun -- 06:26 PM AST     Sunset
Sun -- 08:19 PM AST     0.78 feet High Tide
Sun -- 11:25 PM AST     0.53 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.60.70.70.80.80.80.80.60.40.20.20.20.20.30.40.50.60.70.70.80.70.60.5

Tide / Current Tables for Magueyes Island, Caribbean Sea, Puerto Rico
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Magueyes Island
Click for Map
Sun -- 04:58 AM AST     Moonset
Sun -- 06:16 AM AST     Sunrise
Sun -- 12:09 PM AST     0.35 feet Low Tide
Sun -- 05:56 PM AST     Moonrise
Sun -- 06:26 PM AST     Sunset
Sun -- 09:02 PM AST     0.86 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.70.70.60.60.50.50.50.50.40.40.40.30.40.40.50.50.60.70.80.80.90.90.8

Weather Map
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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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