Friday, July28, 2017 L-36.com


Marine Weather and Tides
Carolina, 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 5:59AMSunset 7:01PM Friday July 28, 2017 12:59 PM AST (16:59 UTC) Moonrise 10:52AMMoonset 11:07PM Illumination 26% Phase: Waxing Crescent; Moon at 5 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
AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 1011 Am Ast Fri Jul 28 2017
Rest of today..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Tonight..Southeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Saturday..East winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Saturday night..Southeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers and isolated Thunderstorms.
Sunday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated Thunderstorms. Scattered showers.
Monday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Isolated showers.
Tuesday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 11 seconds. Northeast swell 4 to 5 feet. Isolated showers.
AMZ700 1011 Am Ast Fri Jul 28 2017
Synopsis for puerto rico and the uS. Virgin islands waters... A weak tropical wave is moving across the local islands today. This will produce an increase in showers and Thunderstorms across the regional waters this afternoon and tonight. A surface high pressure across the central atlantic will continue to yield moderate east to southeasterly winds into the upcoming weekend. Seas and winds are forecast to increase early next week.

7 Day Forecast for Marine Location Near Carolina, PR
   Hourly   EDIT   Help
location: 18.46, -65.99     debug


Area Discussion for - San Juan, PR
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxca62 tjsj 281426
afdsju
area forecast discussion
national weather service san juan pr
1026 am ast Fri jul 28 2017

Update A weak tropical wave will continue to move across the
region this afternoon and tonight. A persistent upper level trough
remain to the northeast of the region until at least Saturday.

Doppler weather radar indicated only isolated shower activity
mostly across the surrounding coastal waters this morning with few
of them affecting the eastern sections of puerto rico. Not
precipitation was observed elsewhere over land areas so far this
morning.

The limited moisture provided by the weak tropical wave in
combination with the upper trough, strong daytime heating and
local effects will be sufficient to produce the development of
another round of scattered showers and isolated thunderstorms
along, north and northwest of cordillera central this afternoon.

Due to previous days rainfall, urban and small stream flooding is
possible this afternoon mostly across northwestern puerto rico.

The shower and thunderstorm activity is expected to diminish
rapidly after sunset.

Aviation MostlyVFR conditions will prevail over all TAF sites
during the rest of the morning hours. Aft 28 16z areas of
convection will form due to an induced tropical wave and
instability mainly over western and central pr and downstream from
the usvi. After 28 16z MVFR ifr conds with mtn obscurations are
psbl in these areas and vcty or over tjmz tjbq tjsj tjps in
shra tsra. Low level SE winds of 5-15 kt expected to diminish
after 28 22z.

Marine Relatively tranquil marine conditions expected to
continue across the local coastal waters through the upcoming
weekend. Mariners can expect seas up to 4 feet and winds up to 15
knots. Showers and possible thunderstorms expected this afternoon
and mariners should exercise caution due to this activity. Seas
and winds are forecast to increase by the upcoming week.

Prev discussion issued 520 am ast Fri jul 28 2017
synopsis...

a weak tropical wave will move across the region today. After this
wave a relative dry air mass is expected to filters tonight into
Saturday morning. A tutt low will continue to meander northeast
of the islands through at least early Saturday morning. This
feature is forecast to weakens as a high pressure ridge builds at
mid levels and hold into the upcoming week. A broad surface high
pressure will continue over the central atlantic ocean.

Short term... Today through Sunday...

columnar moisture reached a minimum of 1.61 inches at 28 06z and
will increase to almost 2 inches by 29 06z as the moisture centered
over the leeward islands moves over the local area today and
tonight. During this time clouds and showers will increase. The gfs
suggest that the lifted index for the surface based parcel will
reach minus 9 this afternoon so expect some isolated thunderstorms
before the best moisture arrives. Showers will continue through most
of the night--but mainly over the local waters, the usvi and the
southeast third of puerto rico. Thunderstorms will likely end
after 29 04z. Although drier air follows the wave, another band of
moisture moves through on Saturday night and this will increase
showers on the southeastern side of puerto rico and around the u.S.

Virgin islands then. This moisture will not have completely exited
puerto rico by 30 18z and this will trigger another round of strong
thunderstorms with heavy rain.

Moisture will be better today than Saturday and this will mean many
more showers and thunderstorms will develop today with areas of
urban and small stream flooding developing later this afternoon.

Then, not as much flooding on Saturday will occur, although some
local areas of flooding are expected, then on Sunday more urban and
small stream flooding is expected to develop.

For the north coast of puerto rico temperatures will drive into the
low to mid 90s owing to the drier air just ahead of the wave and the
southeast flow setting up over the island. The forecast is for 93
degrees in san juan and this would be a record, since the high for
july 28 was 92 degrees set in 1981. Temperatures will not be far
behind on the south coast. Fortunately, although southeast flow
continues, moisture and clouds will keep temperatures a little below
the record tomorrow, which, for san juan, is 93 degrees.

Long term... Monday through Saturday...

a mid level ridge is expected to hold across the area through at
least the end of the work week, turning the atmosphere unfavorable
for organize convection. However, a tropical wave accompanied by a
wind surge is expected to swing by the region on Monday or Tuesday.

At lower levels, a broad high pressure across the central atlantic
will result in east to east-southeast winds through Tuesday. Under
this wind flow, above normal temperatures are possible mainly
along the coastal sections of puerto rico. Then, winds are
expected to increase and shift from the east northeast after
Tuesday.

Although upper level dynamic is not favorable next week, moisture
advection with a moderate to strong northeast wind flow will
result in a seasonable weather pattern each day across the region.

As a result expect trade wind showers across the u.S. Virgin
islands and east puerto rico overnight into the early morning
hours. Followed by afternoon convection along and to the west of
the cordillera central of puerto rico. A surface disturbance is
forecast to move in Wednesday into Thursday providing moisture
pooling and increasing the chance of showers and thunderstorms
across the region. After the passage of this disturbance a dry air
mass with saharan dust particles is forecast to filters over the
region Friday into the weekend.

Aviation...

vfr conditions will prevail over all TAF sites til arnd
28 14z. Aft 28 14z areas of convection will form due to an induced
tropical wave and instability mainly over western and central pr and
downstream from the usvi. Aft 28 16z MVFR ifr conds with mtn
obscurations are psbl in these areas and vcty or over
tjmz tjbq tjsj tjps in shra tsra. Winds bcmg SE 5-15 kt aft 28 12z
up thru fl140. Winds abv fl140 are less than 15 kt.

Marine...

tranquil marine conditions expected to prevail across the regional
waters through the upcoming weekend. Mariners can expect seas
below 5 feet and winds below 18 knots. The potential for showers
and thunderstorms is expected to increase during the afternoon
hours and mariners should exercise caution due to this activity.

Seas and winds are forecast to increase by the upcoming week.

If model are right, this weather pattern would require small
craft advisories.

Preliminary point temps pops
Sju 93 79 91 79 50 30 40 40
stt 88 81 90 79 30 30 50 50

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Jf
long term... .99


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
41053 - San Juan, PR 6 mi59 min ENE 14 G 16 85°F 85°F3 ft1014.1 hPa (-1.1)
SJNP4 - 9755371 - San Juan, PR 7 mi47 min ENE 13 G 18 87°F 86°F1014.8 hPa
FRDP4 - 9753216 - Fajardo, PR 21 mi41 min E 8 G 9.9 85°F 77°F
YABP4 - 9754228 - Yabucoa Harbor, PR 29 mi41 min E 6 G 8 89°F
41056 31 mi59 min ESE 9.7 G 12 84°F 2 ft1015.1 hPa (-0.5)
VQSP4 - 9752619 - Isabel Segunda, Vieques, PR 36 mi41 min ESE 5.1 G 8.9 88°F
ESPP4 - 9752695 - Esperanza, PR 37 mi47 min SSE 7 G 11 84°F 87°F1015.1 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 37 mi74 min E 7 90°F 1016 hPa75°F
AROP4 - 9757809 - Arecibo, PR 38 mi41 min NE 9.9 G 14
CLBP4 - 9752235 - Culebra, PR 38 mi41 min 91°F 86°F1015.2 hPa

Wind History for San Juan, PR
(wind in knots)    EDIT      (on/off)   Help
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
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
Last
24hr
NE11
G14
NE12
G17
E14
E12
G15
E12
G16
E13
E12
G15
E11
E10
SE7
G10
SE5
SE5
SE4
SE4
SE3
SW3
S1
SE1
SE2
S1
SE8
SE5
E12
E14
1 day
ago
E7
SE6
E10
G14
E8
G15
E9
G13
E12
G15
E11
G14
E12
E11
G14
SE6
G9
SE5
SE5
SE4
S2
SE3
SE1
S2
S2
S1
SE4
E5
G9
E6
G11
NE9
NE10
G15
2 days
ago
NE12
G21
E9
G17
E13
G16
E10
G16
NE10
G15
E14
E12
G15
E10
G14
SE6
G9
SE7
SE4
SE4
SE6
SE5
SW2
SW2
SW2
SW4
S1
W2
E9
G12
E9
NE9
E9

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
Click EDIT to select an airport
Tide / Current Tables for Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Boca De Cangrejos
Click for Map
Fri -- 12:43 AM AST     1.30 feet High Tide
Fri -- 06:00 AM AST     Sunrise
Fri -- 07:09 AM AST     0.15 feet Low Tide
Fri -- 10:52 AM AST     Moonrise
Fri -- 01:18 PM AST     1.10 feet High Tide
Fri -- 07:00 PM AST     Sunset
Fri -- 07:14 PM AST     0.27 feet Low Tide
Fri -- 11:07 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.31.31.210.70.40.20.10.20.30.60.811.11.10.90.70.50.40.30.30.40.70.9

Tide / Current Tables for San Juan, La Puntilla, San Juan Bay, Puerto Rico
   EDIT      (on/off)   Help   One Week of Data
San Juan
Click for Map
Fri -- 12:35 AM AST     1.52 feet High Tide
Fri -- 06:01 AM AST     Sunrise
Fri -- 07:01 AM AST     0.21 feet Low Tide
Fri -- 10:52 AM AST     Moonrise
Fri -- 01:11 PM AST     1.31 feet High Tide
Fri -- 07:00 PM AST     Sunset
Fri -- 07:09 PM AST     0.35 feet Low Tide
Fri -- 11:08 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.51.51.41.10.80.50.30.20.30.50.711.21.31.31.10.90.60.40.30.40.60.81.1

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 (12,3,4,5)
      (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.