Marine Weather and Tide Forecast for Emajagua, PR
May 18, 2024 7:56 PM AST (23:56 UTC) Change Location
 | Sunrise 5:47 AM Sunset 6:51 PM Moonrise 2:54 PM Moonset 2:35 AM |
AMZ735 Coastal Waters Of Southern Puerto Rico Out 10 Nm- 411 Pm Ast Sat May 18 2024
Tonight - East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to 3 feet, occasionally to 4 feet. Wave detail: east 3 feet at 5 seconds. Isolated showers.
Sunday - East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 2 to 3 feet, occasionally to 4 feet. Wave detail: east 3 feet at 6 seconds.
Sunday night - East winds 5 to 10 knots. Seas 2 to 3 feet, occasionally to 4 feet. Wave detail: southeast 3 feet at 6 seconds.
Monday - East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet, occasionally to 4 feet. Wave detail: southeast 3 feet at 6 seconds.
Monday night - East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave detail: southeast 3 feet at 6 seconds.
Tuesday - East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave detail: southeast 4 feet at 6 seconds.
Tuesday night - East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet.
Wednesday - East winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the afternoon.
Wednesday night - East winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers.
Thursday - East winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Scattered showers in the morning.
Thursday night - East winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Numerous showers.
AMZ700 411 Pm Ast Sat May 18 2024
Synopsis for puerto rico and the uS. Virgin islands waters - . A surface high pressure across the central and northeast atlantic will result in light to moderate easterly winds through the weekend. Tranquil marine conditions will therefore prevail throughout the forecast period. Afternoon showers and isolated Thunderstorms could move from western puerto rico into the coastal waters each day.
FXCA62 TJSJ 182010 AFDSJU
Area Forecast Discussion National Weather Service San Juan PR 410 PM AST Sat May 18 2024
SYNOPSIS
Hazy skies due to suspended Saharan dust and hot weather conditions will continue through the rest of the weekend and early next week.
However, shower with isolated thunderstorm development is likely each afternoon, mainly across the interior to western portions of Puerto Rico and downwind of the local islands. A wet and unstable weather pattern is still expected by midweek of next week as a deep-layered trough approaches from the west and combines with abundant tropical moisture, heightening flood threat risks.
SHORT TERM
Tonight through Monday...
Very early in the morning, a line of heavy showers, with possibly an embedded very short-lived thunderstorm, developed across Fajardo, Luquillo, and Rio Grande, leaving close to an inch and a half of rainfall accumulations, mostly over Fajardo. By early afternoon, another round of heavy showers and thunderstorms developed over the interior and western/northwestern areas of Puerto Rico. Some of these storms were strong, featuring frequent lightning, gusty wind conditions, and torrential rains. This activity is expected to diminish by this evening as the heating effects, which fuel this convection, subside. Additionally, very hot temperatures were experienced today, and in combination with high moisture content, heat index values once again exceeded 100°F. In some coastal and urban areas, heat index values even surpassed 108°F.
The inherited forecast remains on track as the weak mid-level trough with its axis over the Leeward Islands continues moving eastward.
Sunday will see weak ridging aloft, accompanied by some warm air advection, which may somewhat inhibit convective activity across the area. However, marginal instability at upper levels seems to return on Monday as another weak mid-level shortwave trough moves over the forecast area. This will promote favorable dynamics aloft, with 500 mb temperatures falling from -5 degrees on Sunday to close to -7 degrees Celsius, leading to increased lapse rates.
Moisture content at low levels will remain near climatological norms. Therefore, a similar weather pattern can be expected for the remainder of the short-term forecast, with Sunday possibly experiencing diminishing shower activity during the afternoon hours.
On Monday, a larger area of convective activity is expected, mainly over the interior and northwestern quadrant of Puerto Rico, as well as downwind of El Yunque and smaller islands, as dynamics aloft become conducive to thunderstorm development.
Southeasterly winds will persist, bringing warmer temperatures along with an increase in suspended Saharan dust particulates.
Consequently, hazy skies and hot temperatures are expected, with coastal and urban areas likely requiring Heat Advisories for the next few days. Stay tuned and Stay Hydrated!
LONG TERM
Tuesday to Saturday...
From previous discussion...416 AM AST Sat May 18 2024
A seasonal pattern will continue through Tuesday as a high pressure across the surface of the central Atlantic allows a diurnal trade wind pattern to prevail. However on Wednesday onward through the weekend, the development of a mid to upper-level trough moving across the Caribbean basin eastward towards Puerto Rico will begin to cause tropical moisture to rise up from the ITCZ and spread across the region. A surface low will also begin to develop due to this feature, appearing to gain structure by Friday north of the region. Current model guidance has the dirtiest part of the upper- low remaining over Hispanola through this event, however the influx of moist air with high precipitable water values and southerly flow will cause unstable, wet conditions for the local islands. Mostly all sections of the islands have a chance to see some impressive rainfall during this event. Thunderstorms are likely as well due to strong winds aloft allowing ventilation to occur.
The anticipated period of excessive and heavy rainfall will therefore increase the risk of urban and river flooding especially from Tuesday onwards with the most favorable impacts being Wednesday through Thursday but activity could continue throughout the end of the work week so tuned and be prepared, as we will continue to monitor how this pattern unfolds and make
AVIATION
(18Z TAFS)
VFR conds to prevail over the entire period except for SHRA and isold TSRA ovr NW PR til arnd 18/21Z. Some mtn obs and MVFR/IFR conds could briefly occur. Sfc winds ESE arnd 12 kt with stronger sea breeze influences til 18/21Z followed by winds ovr land less than 6 kt in land breezes. VCSH ovr the USVI and ern PR aft 18/22Z.
Aft 19/14Z sea breezes will return with winds up to 13 kt in ESE flow.
MARINE
A surface high pressure across the central and northeast Atlantic will result in light to moderate easterly winds through the weekend.
Tranquil marine conditions will therefore prevail throughout the forecast period. Afternoon showers and isolated thunderstorms could move from western Puerto Rico into the coastal waters each day.
BEACH FORECAST
There is a low rip current risk for today across all area beaches of Puerto Rico and the U.S. Virgin Islands. The risk will likely remain low through the weekend. However, life-threatening rip currents can often occur in the vicinity of groins, jetties and piers. In addition, with possible maximum heat indices between 102-107 degrees or higher, along the local beaches, heat exhaustion will be likely with prolonged exposure. Stay hydrated!
SJU WATCHES/WARNINGS/ADVISORIES
PR...Heat Advisory until 5 PM AST this afternoon for PRZ001-002-005- 008-010-012.
VI...Heat Advisory until 5 PM AST this afternoon for VIZ001-002.
AM...None.
Area Forecast Discussion National Weather Service San Juan PR 410 PM AST Sat May 18 2024
SYNOPSIS
Hazy skies due to suspended Saharan dust and hot weather conditions will continue through the rest of the weekend and early next week.
However, shower with isolated thunderstorm development is likely each afternoon, mainly across the interior to western portions of Puerto Rico and downwind of the local islands. A wet and unstable weather pattern is still expected by midweek of next week as a deep-layered trough approaches from the west and combines with abundant tropical moisture, heightening flood threat risks.
SHORT TERM
Tonight through Monday...
Very early in the morning, a line of heavy showers, with possibly an embedded very short-lived thunderstorm, developed across Fajardo, Luquillo, and Rio Grande, leaving close to an inch and a half of rainfall accumulations, mostly over Fajardo. By early afternoon, another round of heavy showers and thunderstorms developed over the interior and western/northwestern areas of Puerto Rico. Some of these storms were strong, featuring frequent lightning, gusty wind conditions, and torrential rains. This activity is expected to diminish by this evening as the heating effects, which fuel this convection, subside. Additionally, very hot temperatures were experienced today, and in combination with high moisture content, heat index values once again exceeded 100°F. In some coastal and urban areas, heat index values even surpassed 108°F.
The inherited forecast remains on track as the weak mid-level trough with its axis over the Leeward Islands continues moving eastward.
Sunday will see weak ridging aloft, accompanied by some warm air advection, which may somewhat inhibit convective activity across the area. However, marginal instability at upper levels seems to return on Monday as another weak mid-level shortwave trough moves over the forecast area. This will promote favorable dynamics aloft, with 500 mb temperatures falling from -5 degrees on Sunday to close to -7 degrees Celsius, leading to increased lapse rates.
Moisture content at low levels will remain near climatological norms. Therefore, a similar weather pattern can be expected for the remainder of the short-term forecast, with Sunday possibly experiencing diminishing shower activity during the afternoon hours.
On Monday, a larger area of convective activity is expected, mainly over the interior and northwestern quadrant of Puerto Rico, as well as downwind of El Yunque and smaller islands, as dynamics aloft become conducive to thunderstorm development.
Southeasterly winds will persist, bringing warmer temperatures along with an increase in suspended Saharan dust particulates.
Consequently, hazy skies and hot temperatures are expected, with coastal and urban areas likely requiring Heat Advisories for the next few days. Stay tuned and Stay Hydrated!
LONG TERM
Tuesday to Saturday...
From previous discussion...416 AM AST Sat May 18 2024
A seasonal pattern will continue through Tuesday as a high pressure across the surface of the central Atlantic allows a diurnal trade wind pattern to prevail. However on Wednesday onward through the weekend, the development of a mid to upper-level trough moving across the Caribbean basin eastward towards Puerto Rico will begin to cause tropical moisture to rise up from the ITCZ and spread across the region. A surface low will also begin to develop due to this feature, appearing to gain structure by Friday north of the region. Current model guidance has the dirtiest part of the upper- low remaining over Hispanola through this event, however the influx of moist air with high precipitable water values and southerly flow will cause unstable, wet conditions for the local islands. Mostly all sections of the islands have a chance to see some impressive rainfall during this event. Thunderstorms are likely as well due to strong winds aloft allowing ventilation to occur.
The anticipated period of excessive and heavy rainfall will therefore increase the risk of urban and river flooding especially from Tuesday onwards with the most favorable impacts being Wednesday through Thursday but activity could continue throughout the end of the work week so tuned and be prepared, as we will continue to monitor how this pattern unfolds and make
AVIATION
(18Z TAFS)
VFR conds to prevail over the entire period except for SHRA and isold TSRA ovr NW PR til arnd 18/21Z. Some mtn obs and MVFR/IFR conds could briefly occur. Sfc winds ESE arnd 12 kt with stronger sea breeze influences til 18/21Z followed by winds ovr land less than 6 kt in land breezes. VCSH ovr the USVI and ern PR aft 18/22Z.
Aft 19/14Z sea breezes will return with winds up to 13 kt in ESE flow.
MARINE
A surface high pressure across the central and northeast Atlantic will result in light to moderate easterly winds through the weekend.
Tranquil marine conditions will therefore prevail throughout the forecast period. Afternoon showers and isolated thunderstorms could move from western Puerto Rico into the coastal waters each day.
BEACH FORECAST
There is a low rip current risk for today across all area beaches of Puerto Rico and the U.S. Virgin Islands. The risk will likely remain low through the weekend. However, life-threatening rip currents can often occur in the vicinity of groins, jetties and piers. In addition, with possible maximum heat indices between 102-107 degrees or higher, along the local beaches, heat exhaustion will be likely with prolonged exposure. Stay hydrated!
SJU WATCHES/WARNINGS/ADVISORIES
PR...Heat Advisory until 5 PM AST this afternoon for PRZ001-002-005- 008-010-012.
VI...Heat Advisory until 5 PM AST this afternoon for VIZ001-002.
AM...None.
| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | inHg | DewPt |
| ESPP4 - 9752695 - Esperanza, PR | 23 mi | 56 min | ENE 5.1G | 86°F | 29.99 | |||
| 41056 | 29 mi | 56 min | E 12G | 84°F | 86°F | 2 ft | 29.97 | |
| SJNP4 - 9755371 - San Juan, PR | 34 mi | 56 min | 85°F | 30.00 | ||||
| 41053 - San Juan, PR | 35 mi | 56 min | E 14G | 84°F | 3 ft | 29.96 | ||
| 42085 - Southeast of Ponce, PR | 36 mi | 56 min | 86°F | |||||
| CLBP4 - 9752235 - Culebra, PR | 37 mi | 56 min | 86°F | 30.00 |
toggle option: (graph/table)
| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Temp | DewPt | RH | inHg |
Puerto Maunabo
Click for Map
Sat -- 02:35 AM AST Moonset
Sat -- 05:06 AM AST 0.60 feet High Tide
Sat -- 05:49 AM AST Sunrise
Sat -- 10:01 AM AST 0.25 feet Low Tide
Sat -- 02:54 PM AST Moonrise
Sat -- 06:40 PM AST 0.64 feet High Tide
Sat -- 06:50 PM AST Sunset
Sat -- 10:32 PM AST 0.48 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 02:35 AM AST Moonset
Sat -- 05:06 AM AST 0.60 feet High Tide
Sat -- 05:49 AM AST Sunrise
Sat -- 10:01 AM AST 0.25 feet Low Tide
Sat -- 02:54 PM AST Moonrise
Sat -- 06:40 PM AST 0.64 feet High Tide
Sat -- 06:50 PM AST Sunset
Sat -- 10:32 PM AST 0.48 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Puerto Maunabo, Puerto Rico, Tide feet
| 12 am |
| 0.4 |
| 1 am |
| 0.5 |
| 2 am |
| 0.5 |
| 3 am |
| 0.6 |
| 4 am |
| 0.6 |
| 5 am |
| 0.6 |
| 6 am |
| 0.6 |
| 7 am |
| 0.5 |
| 8 am |
| 0.4 |
| 9 am |
| 0.3 |
| 10 am |
| 0.3 |
| 11 am |
| 0.3 |
| 12 pm |
| 0.3 |
| 1 pm |
| 0.3 |
| 2 pm |
| 0.4 |
| 3 pm |
| 0.5 |
| 4 pm |
| 0.6 |
| 5 pm |
| 0.6 |
| 6 pm |
| 0.6 |
| 7 pm |
| 0.6 |
| 8 pm |
| 0.6 |
| 9 pm |
| 0.5 |
| 10 pm |
| 0.5 |
| 11 pm |
| 0.5 |
Vieques Passage
Click for Map
Sat -- 01:30 AM AST -0.51 knots Max Ebb
Sat -- 02:34 AM AST Moonset
Sat -- 04:58 AM AST 0.00 knots Slack
Sat -- 05:47 AM AST Sunrise
Sat -- 07:23 AM AST 0.28 knots Max Flood
Sat -- 09:48 AM AST -0.00 knots Slack
Sat -- 01:11 PM AST -0.49 knots Max Ebb
Sat -- 02:52 PM AST Moonrise
Sat -- 04:12 PM AST 0.00 knots Slack
Sat -- 06:49 PM AST Sunset
Sat -- 07:41 PM AST 0.64 knots Max Flood
Sat -- 11:03 PM AST -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 01:30 AM AST -0.51 knots Max Ebb
Sat -- 02:34 AM AST Moonset
Sat -- 04:58 AM AST 0.00 knots Slack
Sat -- 05:47 AM AST Sunrise
Sat -- 07:23 AM AST 0.28 knots Max Flood
Sat -- 09:48 AM AST -0.00 knots Slack
Sat -- 01:11 PM AST -0.49 knots Max Ebb
Sat -- 02:52 PM AST Moonrise
Sat -- 04:12 PM AST 0.00 knots Slack
Sat -- 06:49 PM AST Sunset
Sat -- 07:41 PM AST 0.64 knots Max Flood
Sat -- 11:03 PM AST -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Vieques Passage, Puerto Rico Current, knots
| 12 am |
| -0.4 |
| 1 am |
| -0.5 |
| 2 am |
| -0.5 |
| 3 am |
| -0.4 |
| 4 am |
| -0.2 |
| 5 am |
| 0 |
| 6 am |
| 0.2 |
| 7 am |
| 0.3 |
| 8 am |
| 0.3 |
| 9 am |
| 0.1 |
| 10 am |
| -0 |
| 11 am |
| -0.2 |
| 12 pm |
| -0.4 |
| 1 pm |
| -0.5 |
| 2 pm |
| -0.4 |
| 3 pm |
| -0.3 |
| 4 pm |
| -0.1 |
| 5 pm |
| 0.2 |
| 6 pm |
| 0.5 |
| 7 pm |
| 0.6 |
| 8 pm |
| 0.6 |
| 9 pm |
| 0.5 |
| 10 pm |
| 0.3 |
| 11 pm |
| 0 |
Virgin,Islands/San,Juan/Cayey,PR
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