Wednesday, June19, 2019 L-36.com


Marine Weather and Tides
Lomas, PR

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6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 5:47AMSunset 7:03PM Wednesday June 19, 2019 12:50 PM AST (16:50 UTC) Moonrise 9:10PMMoonset 7:41AM Illumination 95% Phase: Waning Gibbous; Moon at 17 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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AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 1024 Am Ast Wed Jun 19 2019
.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 7 seconds. Isolated showers.
Tonight..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers through the night.
Thursday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Thursday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers through the night.
Friday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Saturday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
Sunday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
AMZ700 1024 Am Ast Wed Jun 19 2019
Synopsis for puerto rico and the uS. Virgin islands waters... Surface high pressure across the central atlantic will yield moderate to fresh trade winds across the region during the next several days. This will result in choppy seas across the regional waters and local passages. Increasing winds and seas are forecast especially for the local caribbean waters and passages during the rest of today through Friday, resulting in hazardous seas.


7 Day Forecast for Marine Location Near Lomas, PR
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location: 18.28, -65.93     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 191504
afdsju
area forecast discussion
national weather service san juan pr
1104 am ast Wed jun 19 2019

Update
No changes made to the inherited forecast package and reasoning at
this time. Recent satellite imagery, the national weather service
doppler weather radar and model guidance all suggest a drier airmass
filtering in across the region today, in advance of the previously
mentioned tropical wave now approaching the southern half of the
lesser antilles. This is still expected to bring an increase of
low level tropical moisture to the eastern caribbean and local region
by Thursday: and will therefore favor a better chance for late
morning and afternoon convection. Mid to upper levels will however
remain stable and therefore limit and suppress enhanced or
widespreadconvection. Recent tjsj upper air sounding also
continued to suggest continued strengthening of the trade wind
cap inversion as well as the saharan air layer. Breezy, hot and
hazy conditions will continue through the end of the week.

Aviation update Vfr conds durg prd. No chg to previous avn
discussion. Few -shra shra vcty of local islands with slght chc of
isold tsra vcty tjmz tjbq 19 18z-19 22z. Sfc wnds mainly e-se
15-20 kts W ocnl hir gusts and sea breeze variations.

Marine update No change to previous marine discussion. Recent
data from the surrounding buoys especially those of the caribbean
waters and passages continued to suggest increasing winds and
seas creating choppy conditions. As a result, small craft advisories
will go into effect later tonight for the offshore caribbean waters
and local passages. Small craft operators should continue to exercise
caution elsewhere.

Prev discussion issued 431 am ast Wed jun 19 2019
synopsis... Surface high pressure across the central atlantic
will cause an easterly breeze across the local islands for the
next several days. A tropical wave will pass just south of the
local islands on Thursday, increasing moisture, while an upper
level trough axis gets close to the local islands, which could
increase instability. Dry air to move in on Friday, which will
prevail until Monday when the next tropical wave is expected.

Haze due to saharan dust expected for the next several days.

Short term... Today through Friday...

a drier air mass and saharan dust will continue to hold over the
area today with hazy and partly cloudy skies. The stable air mass
will limit shower activity during the afternoon for many areas.

However, isolated to scattered showers may develop, as a result, of
local and diurnal effects. Later this evening low-level moisture is
forecast to increase as a tropical wave moves into the southern
caribbean waters. Moisture will spread across the u.S. Virgin
islands and puerto rico during the overnight hours and early
Thursday morning. The added moisture will aid in the development of
showers and possible isolated thunderstorms. Then by mid-day on
Thursday the bulk of the moisture will spread across the interior
and western areas of puerto rico. Additionally, the local and
diurnal effects merging with the moisture will induce showers and
possible isolated thunderstorms across the interior and western
areas of puerto rico during the afternoon on Thursday.

At this time instability parameters look meager with 500 mb heights
ranging from -6 to -7 degrees celsius. Additionally, mu and sb cape
are relatively weak, therefore thunderstorm development is not a
sure thing.

Friday, the moisture is forecast to be west of puerto rico with a
drier air mass and saharan dust moving over the region on Friday.

However, showers are possible as a result of local and diurnal
effects during the afternoon.

Long term... Saturday through Thursday...

fair weather with haze due to saharan dust is expected for most of
the long term forecast period. The mid to upper levels will not
cause any sort of significant instability through the weekend and
any showers that occur in the afternoon will be locally induced
across western pr. Due to the presence of saharan dust and drier
than normal air mass, the afternoon convection may be limited in
terms of coverage. However, a broad upper level trough may cause
an increase in the local instability on Monday, at the same time a
tropical wave is forecast to move in, which will increase
moisture. At this time, the long range models are suggesting an
increase in showers and thunderstorms on Monday, but drying out
quickly on Tuesday into Wednesday.

Aviation...VFR conds will continue to prevail across all terminal
sites through 19 18z. Then shra tsra are possible mainly across the
western areas of puerto rico or near terminal sites tjbq and tjmz
with conds improving by 19 22z. Shra tsra could cause brief mvrf
conds. Sfc winds out of the east at 15 to 20 kts with higher gusts
possible. Suspended saharan dust particulates will continue to
affect the local flying area for the through today, but vis should
remain p6sm.

Marine... The local seas will be choppy today as the winds
gradually increase. For today, the local seas are expected to be
up to 6 feet and the winds up to 20 knots. However, the winds are
expected to increase across the local caribbean waters and
passages, resulting in an increase in seas up to 7 feet starting
this evening. For that reason, a small craft advisory will be in
effect starting this evening, continuing through Friday. There is
a moderate risk of rip currents across most of the local beaches,
but a low risk is forecast for western pr, western saint croix,
and most of saint thomas and saint john.

Preliminary point temps pops
Sju 87 78 88 78 20 30 40 20
stt 87 80 87 79 20 40 30 20

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... Small craft advisory from 2 am to 2 pm ast Thursday for anegada
passage southward to 17n.

Small craft advisory from 8 pm this evening to 2 pm ast Friday
for caribbean waters of puerto rico from 10 nm to 17n-mona
passage southward to 17n.

Short term... Ram
long term... .Ram


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41053 - San Juan, PR 16 mi51 min E 16 G 19 82°F 81°F4 ft1017.7 hPa (+0.0)
SJNP4 - 9755371 - San Juan, PR 16 mi57 min ENE 16 G 20 83°F 83°F1018.6 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 16 mi57 min 87°F 75°F
41056 25 mi51 min E 12 G 14 83°F 84°F1018.1 hPa (+0.0)
JOXP4 - Jobos Bay Reserve, Puerto Rico 27 mi66 min E 8 90°F 1020 hPa74°F
ESPP4 - 9752695 - Esperanza, PR 28 mi57 min E 9.9 G 16 88°F 85°F1019.1 hPa
CLBP4 - 9752235 - Culebra, PR 33 mi57 min 89°F 85°F1019.1 hPa
42085 - Southeast of Ponce, PR 43 mi111 min E 18 G 21 83°F5 ft1017.5 hPa (+0.4)
AROP4 - 9757809 - Arecibo, PR 43 mi57 min NE 11 G 18

Wind History for Fajardo, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR11 mi1.9 hrsENE 179.00 miA Few Clouds88°F75°F66%1018.6 hPa

Wind History from JSJ (wind in knots)
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Last 24hrNE17NE17
G27
NE20NE21E18E16E15E13E11E12E13E11E9E10E8E10E7E10E13E9E13E14NE17NE16
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1 day agoE20E19E19NE18E14
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E16E15E12E13E12E13E11E10E10E8E5E7E5E6E8E13E14E16
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2 days agoNE20
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E17E18NE20E18E13E6E7E8E9
G20
E9SE5E5E7E5E7E5E4E7E11E12E17NE16NE15

Tide / Current Tables for Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
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Boca De Cangrejos
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Wed -- 05:38 AM AST     0.43 feet Low Tide
Wed -- 05:48 AM AST     Sunrise
Wed -- 07:41 AM AST     Moonset
Wed -- 10:08 AM AST     0.80 feet High Tide
Wed -- 04:19 PM AST     -0.11 feet Low Tide
Wed -- 07:02 PM AST     Sunset
Wed -- 09:10 PM AST     Moonrise
Wed -- 11:39 PM AST     1.54 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.31.10.80.60.50.40.50.60.70.80.80.60.40.20-0.1-0.10.10.40.71.11.31.5

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
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Wed -- 03:01 AM AST     -0.00 knots Slack
Wed -- 05:47 AM AST     Sunrise
Wed -- 06:40 AM AST     -0.95 knots Max Ebb
Wed -- 07:40 AM AST     Moonset
Wed -- 10:32 AM AST     0.00 knots Slack
Wed -- 01:11 PM AST     0.49 knots Max Flood
Wed -- 04:11 PM AST     -0.00 knots Slack
Wed -- 06:39 PM AST     -0.35 knots Max Ebb
Wed -- 07:00 PM AST     Sunset
Wed -- 09:01 PM AST     0.00 knots Slack
Wed -- 09:08 PM AST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.60.40-0.4-0.7-0.9-0.9-0.8-0.5-0.20.10.40.50.40.30-0.2-0.3-0.3-0.2-00.30.5

Weather Map and Satellite Images
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wmap_A
GOES Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for (12,3,4,5)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.