Sunday, July23, 2017 L-36.com


Marine Weather and Tides
Isabela, PR

Version 3.4
What's New / NOTES
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.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:02AMSunset 7:07PM Sunday July 23, 2017 4:40 AM AST (08:40 UTC) Moonrise 6:09AMMoonset 7:28PM Illumination 0% Phase: New Moon; Moon at 29 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
    EDIT      (on/off)   Help
AMZ742 Coastal Waters Of Northwestern Puerto Rico Out 10 Nm- 425 Am Ast Sun Jul 23 2017
Today..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated Thunderstorms in the afternoon.
Tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Monday..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds.
Monday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers through the night.
Tuesday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated Thunderstorms, then scattered showers.
Wednesday..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated Thunderstorms. Scattered showers.
Thursday..East winds 10 to 15 knots. Seas 2 feet or less. Dominant period 7 seconds. Isolated Thunderstorms. Scattered showers.
AMZ700 425 Am Ast Sun Jul 23 2017
Synopsis for puerto rico and the uS. Virgin islands waters... Moisture associated with a departing tropical wave will continue to result in passing showers across the local waters early this morning. A broad surface high pressure across the central atlantic will continue to promote fresh easterly winds through midweek. Winds are expected to become more east southeast by the end of the workweek.

7 Day Forecast for Marine Location Near Isabela zona urbana, PR
   Hourly   EDIT   Help
location: 18.5, -67.01     debug


Area Discussion for - San Juan, PR
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxca62 tjsj 222311 aaa
afdsju
area forecast discussion... Updated
national weather service san juan pr
711 pm ast Sat jul 22 2017

Update Have amended grids and zones to reflect a better chance
of rain for saint thomas and saint john, and later eastern puerto
rico. Thunderstorms are moving toward the northern u.S. Virgin
islands and, although the tops have come down from over 50 kft,
they are still expected to bear significant rains.

Aviation Shra and psbl tsra accompanying the tropical wave
will begin to impact tist before 23 00z with MVFR conds and mtn
obscurations. Winds at the sfc will continue from the east at
about 10-15kt with higher gusts in shra tsra, overnight weather
will likely cause vcsh across the local terminals except for tjmz.

Limited MVFR and widespread mtn obscurations will likely continue
through at least 23 16z for pr while diminishing aft 23 12z for
tncm tkpk. Winds alf easterly 10-20 kt up thru fl320 becmg
easterly at all levels by 24 00z. Winds strongest blo fl100.

Marine No changes to previous discussion. Thunderstorms may
create locally higher winds and seas.

Prev discussion issued 308 pm ast Sat jul 22 2017
synopsis... A tropical wave with good moisture will move through
the area early tonight followed by drier air Sunday and Monday.

Moisture wrapping around a high pressure will reach the area on
Tuesday. A second tropical wave will follow on Thursday and better
moisture will follow it. Moisture tapers off slightly over the
following weekend.

Short term... Tonight through Tuesday
winds shifted shortly after noon from a prevailing northeast flow
to an east southeast flow suggesting that the tropical wave or a
weaker trough may have passed through the area. The mimic product
shows the best moisture hanging back at about 61.5 degrees west as
of 22 13z and present calculations suggest that it should cross
saint thomas at 23 05z and san juan at about 23 09z--or earlier,
since there are indications that it is accelerating somewhat.

Currently tops have exceeded 50kft in western puerto rico, but
convection has been weaker in eastern puerto rico. Better rainfall
is expected overnight but it will likely be confined to the
southeast third of puerto rico with scattered showers around the
u.S. Virgin islands.

With east to east southeast flow and a definite drop in
columnar moisture the first half of Sunday, maximum temperatures
should again broach the 90s on most of the north coast. Limited
moisture to counteract this heating on the south coast may also
allow high temperatures to resist the sea breezes and be
predominantly in the lower 90s. Monday will continue this trend.

Early Tuesday morning moisture arrives from the northeast that had
traveled around a high pressure north of the area and by Tuesday
afternoon precipitable water will be close to 2 inches again. This
will begin a wetter trend.

Long term... Wednesday through Saturday
areas of moisture with a few dry slots move through the area
through Saturday on mostly easterly low level flow that will
sustain our seasonal summer pattern of showers and thunderstorms
each day. First around the u.S. Virgin islands in the early
mornings and into eastern puerto rico, and then in the western and
interior portions of the puerto rico during the afternoons. No
strong features are currently seen in the models through the end
of july, but seasonal showers and thunderstorms often do produce
urban and small stream flooding in the afternoons.

Aviation... Shra tsra expected to continue over pr this afternoon
until around 22 22z. This will cause vcsh or vcts near the
terminals in pr. Vcsh is expected for the remaining local
terminals as shra move in with the tropical wave that is bringing
plenty of moisture. Winds will continue from the east at about
10-15kt with higher gusts this afternoon, then decrease overnight
to around 10kt. Overnight weather will likely cause vcsh across
the local terminals except for tjmz limited MVFR and mtn
obscurations will likely continue through at least 23 16z. Winds
alf easterly 10-20 kt up thru fl320 becmg easterly at all levels
by 24 00z. Winds strongest blo fl100.

Marine... Seasonally tranquil seas of 5 feet or less are expected
in most of the local waters through the end of july. Small craft
advisories are not expected to be issued this month under the
current forecast. But winds up to 20 knots are possible in exposed
waters and small craft will need to exercise caution.

Preliminary point temps pops
Sju 79 90 81 90 60 50 20 20
stt 80 89 81 90 70 60 20 20

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Ds
long term... .Ws


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PTRP4 16 mi35 min ESE 2.9 G 4.1 77°F
AROP4 - 9757809 - Arecibo, PR 16 mi52 min SSE 1.9 G 2.9
41115 - Rincon, Puerto Rico (181) 17 mi40 min 84°F2 ft
MGZP4 - 9759394 - Mayaguez, PR 21 mi52 min ESE 1.9 G 2.9 77°F 1015.4 hPa
IMGP4 37 mi35 min ENE 5.1 G 7 80°F 1014.7 hPa
MGIP4 - 9759110 - Magueyes Islands, PR 37 mi52 min ENE 1.9 G 2.9 81°F 85°F1015.3 hPa
SJNP4 - 9755371 - San Juan, PR 47 mi52 min SE 6 G 9.9 80°F 84°F1016 hPa
41053 - San Juan, PR 48 mi70 min ESE 7.8 G 9.7 82°F 1015.3 hPa

Wind History for Arecibo, PR
(wind in knots)    EDIT      (on/off)   Help
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last
24hr
SE3
SE4
--
S2
E4
NE5
G9
NE9
G12
NE7
G12
NE8
G12
NE8
G12
NE8
G11
NE6
G10
NE6
G10
NE7
G12
E5
G9
E2
E4
G7
E3
S2
S1
S2
SE3
SE3
SE1
1 day
ago
S5
SE4
E5
E6
G9
E8
G16
E7
G13
E6
G14
NE7
G11
E7
G13
E9
G17
E5
G9
E5
G11
E11
G17
E10
G18
E7
G14
E4
G11
E6
G9
SE5
SE4
SE4
SE4
SE4
SE4
SE4
2 days
ago
NE11
G15
NE13
G19
E9
G12
NE8
G16
NE8
G14
NE10
G15
NE10
G16
NE7
G12
NE8
G13
E9
G17
NE9
G19
NE9
G16
E10
G16
E8
G15
E9
G16
E7
G14
E7
G15
E6
G15
SE9
G13
SE3
SE3
SE4
SE5
SE4

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Aquadilla, Rafael Hernandez Airport, PR6 mi4.8 hrsN 010.00 miClear79°F75°F89%1017.6 hPa

Wind History from JBQ (wind in knots)
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
Last 24hrE6E7E6------E6E8E12
G15
E13
G17
E15
G18
E14E15E13E13E12E11E10E9
G14
E7E5E8E5Calm
1 day ago------------E7E8E9E12
G16
E13E14
G21
E16
G22
E13
G17
E16E11E13
G18
E15
G21
CalmE6E7E6E6E6
2 days ago------------E13
G19
E14
G18
E16E16
G19
E15E16E16E16E17E15E13E15E12
G19
E13E9------

Tide / Current Tables for Aguadilla, Crashboat Beach, Puerto Rico
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Aguadilla
Click for Map
Sun -- 02:30 AM AST     0.16 feet Low Tide
Sun -- 05:47 AM AST     New Moon
Sun -- 06:03 AM AST     Sunrise
Sun -- 06:10 AM AST     Moonrise
Sun -- 07:37 AM AST     0.94 feet High Tide
Sun -- 01:54 PM AST     -0.27 feet Low Tide
Sun -- 07:06 PM AST     Sunset
Sun -- 07:27 PM AST     Moonset
Sun -- 08:45 PM AST     1.66 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.40.20.20.30.50.70.90.90.80.60.30-0.2-0.3-0.10.10.511.41.61.71.51.2

Tide / Current Tables for Mayaguez, Puerto Rico
   EDIT      (on/off)   Help   One Week of Data
Mayaguez
Click for Map
Sun -- 02:54 AM AST     0.38 feet Low Tide
Sun -- 05:47 AM AST     New Moon
Sun -- 06:03 AM AST     Sunrise
Sun -- 06:10 AM AST     Moonrise
Sun -- 07:42 AM AST     1.08 feet High Tide
Sun -- 02:05 PM AST     -0.31 feet Low Tide
Sun -- 07:05 PM AST     Sunset
Sun -- 07:27 PM AST     Moonset
Sun -- 09:05 PM AST     1.94 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.60.40.40.50.70.911.110.70.40.1-0.2-0.3-0.20.10.511.51.81.91.91.6

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
carb_satellite

GOES Local Image of Puerto Rico    EDIT
Geos

Wind Forecast for (4,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Puerto Rico,Virgin Islands
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.