Sunday, April22, 2018 L-36.com


Marine Weather and Tides
Lomas, PR

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 6:00AMSunset 6:44PM Sunday April 22, 2018 2:22 PM AST (18:22 UTC) Moonrise 12:00PMMoonset 12:26AM Illumination 49% Phase: First Quarter Moon; Moon at 7 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- 946 Am Ast Sun Apr 22 2018
.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 around 4 feet. Isolated showers.
Tonight..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northeast swell around 4 feet shifting to the west after midnight. Scattered showers.
Monday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. West swell around 4 feet. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Monday night..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated Thunderstorms in the evening. Numerous showers through the night.
Tuesday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Wednesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Thursday..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 946 Am Ast Sun Apr 22 2018
Synopsis for puerto rico and the uS. Virgin islands waters... Surface high pressure systems across the west and northeast atlantic will continue to produce a moderate to locally fresh wind flow across the regional waters through early next week. Winds and seas will slightly increase across portions of the offshore atlantic on Monday as a northerly swell arrives, and the high pressure ridge builds north of the area. Isolated Thunderstorms will be possible across portions of the local passages and near shore atlantic waters this afternoon.

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 221434
afdsju
area forecast discussion
national weather service san juan pr
1034 am ast Sun apr 22 2018

Update No change to the inherited forecast package at this time.

Recent tjsj 22 18z suggest a gradual erosion of low level moisture
with precipitable water now down to around 1.35 inches compared to
1.70 inches yesterday. Low level winds have become more northeasterly
today which suggest any afternoon convection that form across the
interior should steer more west southwest towards coastal areas.

In addition isolated thunderstorms will be likely due to the erosion
of the upper ridge and the proximity of an upper short wave trough
to out west.

Aviation No change to previous avn discussion. OverallVFR conds.

Aftn shra isold still fcst ovr ctrl mtn range and W sections of pr
til 22 18z.

Marine update Overall seas continued between 4 to 6 feet and winds
of 15 to 20 kts across the coastal waters. Small craft should exercise
caution across most coastal waters and passages. A slight increase
in winds and seas is expected across the offshore atlantic overnight
through Monday due to a surface high pressure north of the region and
the arrival of a northerly swell.

Prev discussion issued 449 am ast Sun apr 22 2018
synopsis... Strong surface high pressure across the central atlantic
will continue to dominate the local area through the rest of the
weekend. An increase in low level moisture is expected early next
week. Upper level trough will dominates the western atlantic
Monday through Wednesday next week.

Short term... Today through Tuesday...

today looks like it will be a bit less active than the past few
days. The drier air moving in and ene wind flow will cause a few
brief showers to affect ne-pr and the usvi in the morning but the
accumulations will be minimal. Then in the afternoon, the shower and
possible thunderstorm development should be mostly across the
southwestern quadrant of puerto rico with some showers also expected
across the higher elevations of eastern and central pr, but the
chance of thunderstorms is higher across sw-pr. This drier air will
be short lived as higher moisture will be moving in for Monday and
Tuesday, at the same time an upper trough will be just to our west,
which should have an impact in the local instability. So the shower
and thunderstorm activity and coverage should be more significant on
Monday and Tuesday, especially for puerto rico as the local effects
combine with the upper level dynamics to produce persistent
thunderstorms in the afternoons. The usvi and the rest of the local
forecast area should observe an overall increase in shower activity
but thunderstorms are more probable over puerto rico.

Long term... Wednesday through Monday...

upper level ridge will build across the northeast caribbean
through this period. However, for mid week an increase in low
level moisture is forecast by computer models. As a result, better
chances for shower and thunderstorm development can be expected
Wednesday and Thursday. For the rest of the period, seasonable
weather conditions are expected.

Aviation...VFR conds expected through the forecast period across
the local terminals. Vcsh for tjsj, tist, and tisx through 22 14z,
then after 22 17z, shra tsra expected in the vicinity of tjps with
possible tempo MVFR at tjmz until about 22 22z. Winds will be mainly
from the E to ene at about 10-15kt with occasional gusts.

Marine... Seas between 4 to 6 feet and winds of 15 to 20 kts are
expected to prevail across the coastal waters. Small craft should
exercise caution across most coastal waters.

Preliminary point temps pops
Sju 86 76 87 75 40 60 60 60
stt 87 76 86 75 20 40 40 40

Sju watches warnings advisories
Pr... None.

Vi... High rip current risk until 6 pm ast this evening for st croix.

Am... None.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 16 mi52 min 80°F 81°F1016.1 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 16 mi52 min 85°F
41056 25 mi52 min E 12 G 14 80°F 1015.9 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 27 mi97 min E 9.9 85°F 1016 hPa70°F
CLBP4 - 9752235 - Culebra, PR 33 mi52 min 82°F 81°F1015.8 hPa
AROP4 - 9757809 - Arecibo, PR 43 mi52 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 mi26 minENE 1710.00 miMostly Cloudy82°F70°F67%1015.4 hPa

Wind History from JSJ (wind in knots)
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Last 24hrE17E15E13E11E12E8E7E6E7E13E8E11E8SE3E6SE4SE3E15E15E14NE15NE15NE15NE17
1 day agoE19
G27
E16E15E14E12E8E6E6E12E4S5SE3CalmCalmSW3CalmSE3E7E9E14NE16E18E18NE13
2 days agoE18
G22
E18E17E14E7E10E10E7E8E7E10E9E6E5SE3E6E7E16E13E17
G22
E14E10
G20
E19NE22

Tide / Current Tables for Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
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Boca De Cangrejos
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Sun -- 12:26 AM AST     Moonset
Sun -- 02:43 AM AST     1.45 feet High Tide
Sun -- 06:02 AM AST     Sunrise
Sun -- 09:29 AM AST     0.48 feet Low Tide
Sun -- 12:00 PM AST     Moonrise
Sun -- 02:03 PM AST     0.78 feet High Tide
Sun -- 05:46 PM AST     First Quarter
Sun -- 06:42 PM AST     Sunset
Sun -- 08:20 PM AST     0.04 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.31.41.41.41.210.70.60.50.50.60.70.70.80.70.60.50.30.100.10.20.4

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
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Sun -- 12:20 AM AST     0.00 knots Slack
Sun -- 12:24 AM AST     Moonset
Sun -- 03:45 AM AST     0.75 knots Max Flood
Sun -- 06:00 AM AST     Sunrise
Sun -- 06:54 AM AST     -0.00 knots Slack
Sun -- 10:24 AM AST     -0.89 knots Max Ebb
Sun -- 11:59 AM AST     Moonrise
Sun -- 02:04 PM AST     0.00 knots Slack
Sun -- 04:50 PM AST     0.55 knots Max Flood
Sun -- 05:46 PM AST     First Quarter
Sun -- 06:41 PM AST     Sunset
Sun -- 07:49 PM AST     -0.00 knots Slack
Sun -- 10:41 PM AST     -0.51 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.10.20.50.70.70.60.3-0-0.4-0.7-0.9-0.9-0.7-0.4-00.30.50.50.40.2-0-0.3-0.5-0.5

Weather Map and Satellite Images
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wmap_A
GOES Local Image of Puerto Rico    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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (14,3,4,5)
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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.