Monday, March18, 2019 L-36.com


Marine Weather and Tides
Lomas, PR

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:28AMSunset 6:35PM Monday March 18, 2019 11:31 AM AST (15:31 UTC) Moonrise 4:19PMMoonset 4:34AM Illumination 93% Phase: Waxing Gibbous; Moon at 12 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- 1102 Am Ast Mon Mar 18 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 11 seconds. Northeast swell 4 to 5 feet. Isolated showers.
Tonight..Southeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northeast swell 4 to 5 feet.
Tuesday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northeast swell 4 to 5 feet.
Tuesday night..Southeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northeast swell 4 to 5 feet. Isolated showers through the night.
Wednesday..Southeast winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
Thursday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated showers.
Friday..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
AMZ700 1102 Am Ast Mon Mar 18 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure across the central atlantic will induce a moderate to locally fresh east to southeast wind flow for the next few days. A northerly swell is expected to arrive and spread across the regional waters today, continuing into Tuesday. As a result, small craft operators should exercise caution across the atlantic waters today into Tuesday morning.


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 181518
afdsju
area forecast discussion
national weather service san juan pr
1118 am ast Mon mar 18 2019

Update No changes to the inherited forecast package. Clusters
of clouds with a few light to moderate showers moved over coastal
areas of eastern and southern puerto rico, but quickly dissipated
over land. Moisture transported with these patches will aid in the
development of locally induced showers, which will concentrate
over the western interior and drift northwestward under an east to
east-southeast wind flow. A mid-to-upper level ridge will
suppress deep convection, limiting the duration of showers and
keep rainfall accumulations to below a quarter of an inch.

Elsewhere, mostly dry and fair weather conditions will prevail.

Aviation Surface winds from east to east-southeast between 10-15
kts with sea breeze variations and occasional higher gusts. Winds
will become light and variable after 18 22z. Vcsh expected at tjbq
between 18 14-23z. However, no significant operational aviation
weather impacts at this time.

Marine Winds across the regional waters continued between
10-15 kts with occasionally higher gust and seas mainly between
2-5 feet. A small northerly swell is still forecast to arrive
across the local atlantic, requiring small craft operators to
exercise caution. A high rip current risk continues for beaches
along the north coast of puerto rico.

Prev discussion issued 444 am ast Mon mar 18 2019
synopsis... Surface high pressure north of the local area will
maintain a moderate wind flow across the local areas, but a
surface low across the southwestern atlantic will cause the local
winds to have a slight east southeasterly direction today and
Tuesday. Mid level high pressure and dry air mass will limit
shower activity across the local islands. Mainly fair weather is
expected with perhaps a brief isolated showers, with the
exception of any locally induced afternoon shower across
northwestern puerto rico.

Short term... Today through Wednesday...

strong high pressure at mid levels will keep the stable through at
least Tuesday. Under the influence of the ridge aloft, a strong
inversion between 850-700 mb will trap the moisture at low levels.

This will limit the vertical development of the afternoon clouds and
showers over the interior and northwest puerto rico. As a result,
expect little rainfall accumulations with the isolated showers over
northwest puerto rico this afternoon. Elsewhere, little or no shower
activity is forecast as conditions remain dry and stable.

For Tuesday, the atmosphere becomes even more dry and the inversion
intensifies as mid-level ridge axis moves over the northeast
caribbean region favoring a subsidence air mass. The precipitable
water values are forecast to drop near 0.65 inches, around 50% below
normal. Therefore, the chances of showers for Tuesday are very low.

Sunny skies will prevail across most of the local islands.

Conditions will change slightly on Wednesday as moist southeasterly
flow will bring some trade wind showers to the local area. As a
result, some isolated to scattered showers are possible especially
across the northwest puerto rico in the afternoon. However, the rest
of the area including the u.S. Virgin islands should continue to
experience fair weather conditions.

Long term... Thursday through Tuesday...

surface low pressure to the north of the local islands will relax
the local pressure gradient and cause the local winds to lighten
and have a southeasterly component from late Wednesday into
Thursday. For that same time period the available moisture is
expected to continue to be below normal. That said, an area of
higher moisture could move in on Friday from the east as a frontal
boundary stalls well to the north northwest of the local area.

Adding to that is a weak mid level trough that could move to the
west and over the local islands. This setup, if the models verify,
could bring some rainfall to the local area, albeit it does not
look like too much rain, but a brief break from the dry weather we
have been having and that we expect for most of the forecast
period. However, for Saturday and Sunday, it looks like some
lingering moisture is possible but not enough to cause any
significant amounts of rain, the frontal boundary is still
forecast to stay north northwest of the local islands. Long range
models are showing a surface low move through the southwestern
atlantic on Monday and Tuesday, dragging moisture from the south
and over the local islands, but the mid and upper levels for those
days are not favorable for prolonged and significant vertical
development of showers, so the shower activity associated with
that moisture will probably be scattered. Keep in mind this is the
long term forecast and confidence is low this far out in the
forecast.

Aviation...VFR conds are expected thru the forecast period as
showers if any will be light and short-lived. E to ese winds of
10-15 kts are expected with sea breeze variations at tjps and
tjmz.

Marine... Northeasterly swell is expected today into Tuesday. This
swell will cause a slight increase in wave height across the local
area but the biggest impact might be the high risk of rip currents
that is expected across the north central and northwestern beaches
of puerto rico today and tonight. The local seas will be up to 5
feet and the winds will be from the east to east-southeast at
around 10-15 knots, possibly up to 20 knots across the coastal
atlantic waters of puerto rico.

Preliminary point temps pops
Sju 87 75 87 73 20 0 0 20
stt 84 74 84 73 20 0 20 20

Sju watches warnings advisories
Pr... High rip current risk through late tonight for north central.

High rip current risk from 6 pm ast this evening through late
tonight for northwest.

Vi... None.

Am... None.

Short term... Icp
long term... .Icp
aviation... ..Icp


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41053 - San Juan, PR 16 mi31 min NNE 3.9 G 5.8 80°F 80°F4 ft1017 hPa (+1.2)
SJNP4 - 9755371 - San Juan, PR 16 mi37 min ENE 7 G 11 81°F 80°F1017.9 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 16 mi37 min 82°F 70°F
41056 25 mi31 min ESE 16 G 19 78°F 80°F1017.4 hPa (+1.6)
JOXP4 - Jobos Bay Reserve, Puerto Rico 27 mi106 min E 8.9 83°F 1019 hPa68°F
ESPP4 - 9752695 - Esperanza, PR 28 mi37 min ESE 13 G 19 80°F 79°F1018.1 hPa
CLBP4 - 9752235 - Culebra, PR 33 mi37 min 82°F 81°F1018.6 hPa
42085 - Southeast of Ponce, PR 43 mi91 min ESE 16 G 19 80°F1016.9 hPa (+2.1)
AROP4 - 9757809 - Arecibo, PR 43 mi37 min N 5.1 G 6

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 mi95 minVar 510.00 miPartly Cloudy84°F66°F55%1017.7 hPa

Wind History from JSJ (wind in knots)
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Last 24hrNE10NE15E16E19NE17E16E15E10SE7SE5S3CalmCalmCalmCalmCalmE3CalmCalmCalmSE3E756
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E11NE10E10NE8NE6NE6E8E6E4SE3CalmCalmCalmCalmCalmCalmCalmCalm43E5
2 days agoNE11NE12NE12NE13NE15E16E15E11E9E8E7E8E8NE10NE11NE10NE10E10NE9E8NE10E10NE11E10

Tide / Current Tables for Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
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Boca De Cangrejos
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Mon -- 12:28 AM AST     -0.06 feet Low Tide
Mon -- 04:33 AM AST     Moonset
Mon -- 06:29 AM AST     Sunrise
Mon -- 07:35 AM AST     1.43 feet High Tide
Mon -- 01:56 PM AST     0.38 feet Low Tide
Mon -- 04:18 PM AST     Moonrise
Mon -- 06:34 PM AST     Sunset
Mon -- 07:13 PM AST     1.00 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0-00.10.30.711.31.41.41.31.10.80.60.40.40.40.60.80.9110.80.60.3

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
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Mon -- 02:14 AM AST     -0.57 knots Max Ebb
Mon -- 04:31 AM AST     Moonset
Mon -- 05:06 AM AST     0.00 knots Slack
Mon -- 06:28 AM AST     Sunrise
Mon -- 08:28 AM AST     0.76 knots Max Flood
Mon -- 11:39 AM AST     -0.00 knots Slack
Mon -- 03:01 PM AST     -0.85 knots Max Ebb
Mon -- 04:17 PM AST     Moonrise
Mon -- 06:29 PM AST     0.00 knots Slack
Mon -- 06:32 PM AST     Sunset
Mon -- 09:18 PM AST     0.60 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.2-0.5-0.6-0.5-0.3-00.30.60.70.70.60.2-0.1-0.5-0.7-0.8-0.8-0.5-0.20.20.50.60.60.4

Weather Map and Satellite Images
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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 (11,2,3,4)
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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.