Friday, April26, 2019 L-36.com


Marine Weather and Tides
Isabela, 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 6:03AMSunset 6:49PM Friday April 26, 2019 4:27 AM AST (08:27 UTC) Moonrise 12:42AMMoonset 12:04PM Illumination 57% Phase: Waning Gibbous; Moon at 22 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- 328 Am Ast Fri Apr 26 2019
Today..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Northeast swell around 4 feet.
Tonight..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Isolated showers.
Saturday..Northeast winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds.
Saturday night..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Sunday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers.
Monday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated Thunderstorms. Numerous showers.
Tuesday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Isolated Thunderstorms. Scattered showers.
AMZ700 328 Am Ast Fri Apr 26 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A gentle to moderate easterly wind flow will continue today through the weekend. Tranquil marine conditions are expected to hold across the regional waters through at least early next week.


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 260811
afdsju
area forecast discussion
national weather service san juan pr
411 am ast Fri apr 26 2019

Synopsis
A drier air mass will limit shower activity over the next several
days. However, moisture is expected to gradually increase this
weekend. The moisture increase should aid in shower development
mainly during the afternoon. Early next week a mid to upper-level
trough will deepen, and enhance instability over much of the
region. Additionally, the subtropical jet will also enhance
instability as a result of its winds of 70 to 90 kts. The
instability combined with low-level moisture should support deep
convection across portions of western and interior areas of puerto
rico. Then early Wednesday the mid and upper-level trough cuts
off from the main flow, and keep unsettled conditions over much of
the area through Friday.

Short term Today through Sunday... .

A mid- to upper-level ridge will build from the east and will hold
through at least Sunday. A surface high pressure will continue to
promote an easterly wind flow across the islands. Stable and fair
weather conditions will prevail today. However, limited low-level
moisture combined with diurnal heating and local effects will aid in
shower development across the central and western interior sections
during the afternoon. The strongest activity could produce ponding
of water in roads and poorly drained areas across western pr.

Saturday, shallow moisture returns to the region from the southeast.

This moisture will promote passing showers across the local waters,
the u.S. Virgin islands and east-pr after midnight into Saturday
morning. Shower activity will increase during the afternoon mainly
across central and western pr. In addition, low level convergence
will bring shower activity across the u.S. Virgin islands and e-pr
at time. The southern slopes will observe warmer daytime
temperatures.

A similar weather pattern will continue on Sunday. Therefore, shower
development will be due to low-level convergence during the
overnight and morning hours, and due to local and diurnal effects
during the afternoon.

Long term
Monday a mid and upper-level trough is forecast to deepen near
cuba and enhance upper-level instability over the region. Also,
strong upper-level winds of 70 to 90 kts associated with the
subtropical jet will surge just north of puerto rico through
Tuesday. The aformentioned features will support upper-level
divergence across puerto and the u.S. Virgin islands. In addition,
a weak tropical wave will remain well south of puerto rico,
however, the wave will bring deep tropical moisture into the
forecast area late Sunday into Monday. Precipitable water values
on Monday will range from 1.6 to 2.0 inches climatological these
values are close to the 99th percentile for the month of april.

The mid to upper level moisture will erode away the drier air
that has held in the mid and upper-levels of the atmosphere. This
is depicted by the sju-gfs skew-t and GFS relative humidity
images. The 500 mb temperatures on Monday show values ranging
from
-9 to -10 degrees celsius, which would support deep organized
covection.The abundant low-level moisture, adequate upper-level
instability, and upper-level forcing are ingredients needed for
deep organized convection and thunderstorms.

However, GFS galvez-davison index (thermodynamic index) for
tropical convection shows values ranging from 15 to 25. These
values support the potential for a few isolated thunderstorms,
but most of the showers will be shallow convection. Tuesday the
mid and upper-level troughs begin to cut off from the main flow
this will keep troughiness and instability around through the rest
of the workweek. This will increase the likely-hood for afternoon
showers across most of the island. This forecast is depends on
the position of the mid to upper-level trough, and the available
low-level moisture. Therefore, any deviation in track or position
of the aforementioned features could change the long-term
forecast. For this reason the confidence of the long-term forecast
is medium.

Aviation
Vrf conds will continue across the local flying areas through at
least 26 15z. Then, shra +shra will develop over the interior, and
northwest sections of puerto rico. Afternoon showers should
dissipate around 26 00z. Winds will continue calm to light and
variable, becoming from the E to ese at 10 to 15 knots with higher
gusts and sea breeze variations.

Marine
Tranquil marine conditions will continue today through the
weekend. Seas will range from 3 to 5 feet, and winds will be
easterly at 5 to 15 kts. A low to moderate rip currents risk will
continue through Sunday. The moderate risk of rip currents are for
the north facing beaches of puerto rico.

Preliminary point temps pops
Sju 87 76 88 77 10 40 30 30
stt 86 76 86 76 20 40 40 30

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Cam
long term... .Tw


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
AROP4 - 9757809 - Arecibo, PR 16 mi40 min SSE 4.1 G 5.1
PTRP4 16 mi28 min E 7 G 9.9 73°F
41115 - Rincon, Puerto Rico (181) 17 mi58 min 81°F2 ft
MGZP4 - 9759394 - Mayaguez, PR 21 mi46 min 74°F 82°F1016.6 hPa
MGIP4 - 9759110 - Magueyes Islands, PR 37 mi40 min Calm G 2.9 74°F 81°F1016.5 hPa
SJNP4 - 9755371 - San Juan, PR 47 mi46 min ESE 7 G 8.9 77°F 82°F1016.3 hPa
41053 - San Juan, PR 48 mi58 min E 9.7 G 14 78°F 1015.3 hPa

Wind History for Arecibo, PR
(wind in knots)    EDIT      (on/off)   Help
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
1
AM
2
AM
3
AM
4
AM
Last
24hr
SE5
SE6
SE5
S4
E6
G9
NE10
G13
NE10
G14
NE9
G14
NE13
G17
NE10
G16
NE14
G18
NE10
G16
NE9
G14
NE10
G16
E4
G9
E6
G10
E6
G11
E5
G9
E4
SE4
SE3
SE3
SE3
SE3
1 day
ago
SE7
S4
S3
SE2
E3
NE6
G11
NE8
G12
NE11
G14
NE9
G12
NE10
NE10
NE7
NE8
NE6
NE5
G9
E5
G8
NE5
G8
E4
SE3
SE5
SE4
SE4
SE6
SE6
2 days
ago
S5
SE6
SE7
SE5
E7
G12
NE6
G9
NE8
G14
NE11
G16
NE10
G17
NE9
G12
NE10
G13
NE10
G13
NE9
G14
NE10
G13
NE5
G8
E3
G6
E3
SE4
SE3
SE4
SE5
SE4
SE4
S4

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from JBQ (wind in knots)
10
PM
11
PM
12
AM
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
Last 24hrE7E6E6SE4----------SE4SE5E9E12
G16
E16
G19
E14
G20
NE13NE14
G19
E14
G18
E13
G18
E15
G18
E13E10E9E9
1 day ago------------------CalmE4SE6NE7NE9NE10
G14
NE9NE10E10
G14
NE8E8E7E8E8E7
2 days ago------------------SE5E9E7E11NE11NE11
G15
NE15
G16
N8NE10--NE11NE11
G16
E9E9E9

Tide / Current Tables for Aguadilla, Crashboat Beach, Puerto Rico
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Mayaguez, Puerto Rico
   EDIT      (on/off)   Help   One Week of Data
Mayaguez
Click for Map
Fri -- 12:42 AM AST     Moonrise
Fri -- 02:07 AM AST     1.35 feet High Tide
Fri -- 06:04 AM AST     Sunrise
Fri -- 09:02 AM AST     0.34 feet Low Tide
Fri -- 12:06 PM AST     Moonset
Fri -- 01:50 PM AST     0.72 feet High Tide
Fri -- 06:19 PM AST     Last Quarter
Fri -- 06:48 PM AST     Sunset
Fri -- 07:57 PM AST     0.07 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
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
1.11.31.41.31.20.90.70.50.40.30.40.50.60.70.70.70.60.40.20.10.10.10.30.5

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
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.