Sunday, August18, 2019 L-36.com


Marine Weather and Tides
Isabela, PR

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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 6:10AMSunset 6:54PM Sunday August 18, 2019 3:26 AM AST (07:26 UTC) Moonrise 9:08PMMoonset 8:34AM Illumination 93% 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
    EDIT      (on/off)   Help
AMZ742 Coastal Waters Of Northwestern Puerto Rico Out 10 Nm- 921 Pm Ast Sat Aug 17 2019
Rest of tonight..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Sunday..Northeast winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated Thunderstorms in the afternoon.
Sunday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Isolated Thunderstorms in the evening. Scattered showers through the night.
Monday..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Numerous showers through the day. Isolated Thunderstorms in the afternoon.
Monday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 11 seconds. Isolated showers.
Tuesday..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated Thunderstorms. Numerous showers.
Wednesday..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated Thunderstorms, then isolated showers.
Thursday..Southeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated Thunderstorms, then isolated showers.
AMZ700 921 Pm Ast Sat Aug 17 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure centered across the north central atlantic and a surface trough moving across the local caribbean waters will maintain moderate to fresh east winds across the local waters overnight. A tropical wave is forecast to move through the area increasing the potential for showers and Thunderstorm development across the regional waters late Sunday through Tuesday.


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 180113
afdsju
area forecast discussion
national weather service san juan pr
913 pm ast Sat aug 17 2019

Update Surface trough continued to cross the region with the
trailing edge now just over puerto rico this evening. Recent
satellite imagery and doppler weather radar showed showers and
isolated thunderstorms over the coastal waters while most of the
afternoon activity that developed over puerto rico had move offshore
or diminished. Passing showers however continued to affect parts
of the u.S. Virgin islands from time to time.

Expect periods of passing showers to continue to affect the east
and south coastal areas of the islands during the rest of the
overnight and early morning hours as the trough exits the region.

The upper upper trough in the meantime is still expected to
slowly lift north of the region by Sunday as an upper ridge will
build across the northeastern caribbean. The increasing anticyclonic
flow should provide sufficient ventilation for afternoon convection
on Sunday.

The fairly active tropical wave is still forecast to move across
the region late Sunday through Tuesday. This will increase the
potential for showers and thunderstorm activity across the
forecast area. Forecast layered precipitable water values
significantly increases to around 2.25 inches by Monday as the
wave crosses the region. This will also support better potential
periods of heavy rainfall and more likelihood of urban and small
stream flooding.

Aviation update PrevailingVFR conds at local terminals durg
prd. Sct lyrs nr fl025... Sct-bkn fl050... Fl090 with brief MVFR in
shra isold tsra ovr regional waters and en route btw local islands.

Few tops abv fl250 with tsra ovr atl and caribbean waters. Sfc
wnds lgt vrb to calm bcmg mainly fm E 10-15 kts with ocnl hir
gusts aft 18 14z with sea breeze variations. Vcsh at
tjsj tist tisx btw 18 04z-18 12z... And vcsh vcts at tncm tkpk fm
18 02z-18 12z.

Marine update No significant changes to the previous marine
forecast discussion. Recent model guidance suggests no major changes
to the overall winds and seas during the period. Winds of 10 to 15
knots and seas between 2-5 feet will prevail.

Prev discussion issued 158 pm ast Sat aug 17 2019
synopsis...

an induced surface trough is producing showers and thunderstorms
across the local islands. This activity will spread across the
western interior and western sections of puerto rico through this
evening. A tropical wave will bring showers and thunderstorms
Sunday through Tuesday.

Short term... Tonight through Monday...

an upper-level trough is inducing a surface trough across the
islands today. This trough will continue to produce periods of
showers and thunderstorms through this evening. Urban and small
stream flooding, frequent lightning and brief gusty winds are
possible with this activity.

Activity should diminish overnight, as a relative drier air mass
ahead of a tropical wave moves from the east across the
archipelago of the u.S. Virgin islands and puerto rico. However,
the proximity of an upper-level trough will keep alive the
potential for shower and thunderstorm formation across the local
waters and the windward sections overnight and Sunday morning.

The leading edge of a tropical wave is expected to increase the
potential for shower and thunderstorm formation by Sunday
afternoon. The available moisture combined with local effects and
the diurnal heating will aid in another round of heavy showers
and thunderstorms over the west sections of the islands and
between the usvi and eastern pr waters.

At this time, a wet and unstable weather pattern is likely
through the short term period. It is important to mention that
goes-16 detected a dry air mass with saharan dust surrounding the
aforementioned tropical wave, which could weakens this feature.

Total rainfall accumulations should range between 2 and 4 inches
with locally higher amounts.

Long term... Tuesday through Saturday...

high pressure at upper levels will have nosed in from the east
northeast over the local area by Tuesday. Although lower pressure
will be southeast high pressure will hold to the north through the
end of the period and be the dominant influence over the weather.

Behind the tropical wave that moved through late Sunday and Monday
a band of moisture will flow over the area in east southeast flow
until a 700 mb ridge passes on Tuesday afternoon (20 18z). Then
flow will switch to east northeast at 700 mb and bring some of the
moisture back over the area. This will allow good convection over
puerto rico during the afternoon and evening. This flow will also
be weakly reflected in the surface flow so as to keep temperatures
on the north coast more moderate and generally no higher than the
lower 90s a few miles inland. Conditions on Wednesday and
Thursday become more stable and moisture will fall below 2 inches
of precipitable water on Tuesday night with only minor peaks on
Wednesday night and Thursday evening to bring enhancement to
shower activity. Thunderstorms should be limited, if any, to the
afternoon in western puerto rico Wednesday. Although moisture
will continue low Wednesday through Friday, some disturbances will
trigger scattered showers Thursday afternoon and Friday night
into Saturday.

Aviation...

mainlyVFR conditions expected across tist tisx tncm tkpk tjps.

Tempo MVFR to brief ifr conditions are possible across tjmz tjbq,
with brief MVFR conditions possible across tjsj. It'll be breezy
during thunderstorm activity as well. In general, winds will be
out of the east at 10 to 20 knots.

Marine...

a surface high pressure centered across the north central
atlantic and a surface trough moving across the regional waters
will help to maintain moderate to fresh east to northeast winds
across the local waters. Seas will continue between 4 and 6 feet
across open waters and below 4 feet across protected areas.

Thunderstorm formation will continue across the coastal western
waters of puerto rico and the mona passage through this evening,
as well as across the surrounding waters of the u.S. Virgin
islands and eastern pr. Brief gusty winds and torrential rainfall
are expected with this activity.

Small craft advisories are not expected through much of the
forecast cycle. Brief gusty winds, torrential rains and frequent
lightning will accompany thunderstorms generated by a passing
tropical wave Sunday night through Tuesday night.

Preliminary point temps pops
Sju 79 89 78 86 20 40 60 70
stt 80 88 78 88 40 50 70 60

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

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


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 mi57 min ESE 1.9 G 4.1
PTRP4 16 mi27 min E 4.1 G 6 76°F
41115 - Rincon, Puerto Rico (181) 17 mi27 min 85°F2 ft
MGZP4 - 9759394 - Mayaguez, PR 21 mi63 min 76°F 85°F1016.7 hPa
MGIP4 - 9759110 - Magueyes Islands, PR 37 mi63 min E 1 G 2.9 81°F 85°F1016.6 hPa
SJNP4 - 9755371 - San Juan, PR 47 mi57 min SSE 1.9 G 4.1 79°F 85°F1016.6 hPa

Wind History for Arecibo, PR
(wind in knots)    EDIT      (on/off)   Help
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
1
AM
2
AM
3
AM
Last
24hr
--
SE3
SE6
SE4
SE3
SE1
G5
NE7
G10
NE7
G11
NE9
G14
NE11
G18
SE7
E6
NE5
G9
E6
E5
G8
E1
--
E1
--
--
E3
--
--
--
1 day
ago
E4
E3
G7
E7
SE4
E5
G8
NE8
G15
NE8
G13
NE8
G12
NE11
G17
NE10
G16
NE8
G13
NE11
G16
NE11
G16
NE9
G15
NE11
G16
NE9
G12
NE10
G14
E3
G6
NE9
G20
SE2
NE13
G17
SE4
SE4
SE4
2 days
ago
SE4
SE4
SE1
G4
E7
G10
E7
G11
E6
G13
NE9
G17
NE10
G18
NE12
G17
NE13
G21
NE12
G19
NE15
G26
NE12
G20
NE12
G21
E10
G16
E9
G17
E6
G9
E5
G9
E3
E2
SE3
SE3
SE2

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Aquadilla, Rafael Hernandez Airport, PR6 mi2.6 hrsSE 410.00 miFair75°F71°F89%1017.9 hPa

Link to 5 minute data for TJBQ

Wind History from JBQ (wind in knots)
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
1
AM
Last 24hr----------E3SE6E6E11E11NE15E15
G20
S13
G22
SW9CalmSE5E9E5SE3CalmSE3E5SE5SE4
1 day ago------------E8E9E12
G19
E16
G22
E16
G21
----NE15
G22
E17E13
G19
E13
G18
E15
G19
E13E13--E15E9E10
2 days ago----------E6E8E12
G15
E13
G19
E13
G17
E15E18
G23
E17
G24
E18
G23
E16
G21
E11
G20
E11
G20
E13
G16
E10E8--------

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
Sun -- 04:43 AM AST     0.51 feet Low Tide
Sun -- 06:11 AM AST     Sunrise
Sun -- 08:35 AM AST     Moonset
Sun -- 10:15 AM AST     1.25 feet High Tide
Sun -- 04:23 PM AST     0.39 feet Low Tide
Sun -- 06:53 PM AST     Sunset
Sun -- 09:07 PM AST     Moonrise
Sun -- 10:43 PM AST     1.49 feet High 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
1.41.10.90.70.50.50.60.811.21.21.21.10.90.70.50.40.40.60.81.11.31.51.5

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 (3,6,7,8)
      (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.