Monday, May29, 2017 L-36.com


Marine Weather and Tides
Emajagua, PR

Version 3.4
What's New / NOTES
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 5:45AMSunset 6:56PM Monday May 29, 2017 11:42 PM AST (03:42 UTC) Moonrise 9:41AMMoonset 10:56PM Illumination 21% 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
AMZ735 Coastal Waters Of Southern Puerto Rico Out 10 Nm- 934 Pm Ast Mon May 29 2017
.small craft should exercise caution...
Rest of tonight..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers and isolated Thunderstorms.
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 in the morning. Isolated Thunderstorms through the day.
Tuesday night..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated Thunderstorms.
Wednesday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated Thunderstorms.
Wednesday night..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Thursday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated Thunderstorms. Scattered showers.
Friday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Isolated showers.
Saturday..East winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
AMZ700 934 Pm Ast Mon May 29 2017
Synopsis for puerto rico and the uS. Virgin islands waters... A tropical wave will move west of the regional waters tonight. However, showers and Thunderstorms could still affect the regional waters through late Tuesday night. Winds and seas could be higher in the vicinity of Thunderstorms. Surface high pressure across the central atlantic will continue to promote moderate to locally fresh east winds through the forecast period.

7 Day Forecast for Marine Location Near Emajagua, PR
   Hourly   EDIT   Help
location: 18, -65.88     debug


Area Discussion for - San Juan, PR
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxca62 tjsj 300208
afdsju
area forecast discussion
national weather service san juan pr
1008 pm ast Mon may 29 2017

Update High moisture content across the forecast area and upper
level trof will continue to result in shower and thunderstorm
development across the islands. The 30 00z tjsj sounding indicated
2.08 in of pwat well above normal values. Tropical wave axis is
currently west of the forecast area and is resulting in scattered
thunderstorms across the mona passage into the dominican republic.

For the rest of the overnight hours, periods of heavy showers are
possible across the eastern and northern coastal areas of pr.

Isolated thunderstorms developed during the last hour over
portions of the san juan metro area and north central pr. This
activity can lead to ponding of water and minor urban flooding
during the next couple of hours.

Runoff from afternoon heavy showers and thunderstorms across
western pr will continue to create flooding along the culebrinas
river from mona to aguada aguadilla. Therefore a flood warning is
in effect through 2:15 am Tuesday. Elsewhere, trade wind showers
enhanced by the upper level trof will continue to move from time
to time over land areas.

Aviation Shra tsra will continue to affect tjsj through at
least 04z, resulting in MVFR to brief ifr conds. Across the
leeward usvi terminals trade winds showers will result in
mainly -ra vcsh periods through the forecast period. After
30 16z... Tsra expected to impact the flying of tjmz tjbq. Also,
possible MVFR at tjsj due to shra tsra from EL yunque area.

Latest tjsj sounding indicated ese winds below fl050 at 7-22
kts.

Marine... Latest buoy data across the coastal waters had seas
between 2-4 feet and east to northeast winds around 15 knots.

Higher seas and winds expected in the vicinity of showers and
thunderstorms. No change from previous discussion.

Prev discussion issued 327 pm ast Mon may 29 2017
synopsis... A mid to upper level long wave trough extending from
the central atlantic southwest to central bahamas and central
caribbean inducing a diffluence flow aloft over the eastern
caribbean. A tropical wave over the eastern caribbean with axis
already west of pr moving west at 15 to 20 kts. Satellite images
showed scattered showers and thunderstorms trailing this wave
extending northward to just north and northeast of the local
islands.

Short term... Tonight through Wednesday night... Area of showers
and thunderstorms trailing the wave expected to spread over the
local islands tonight and Tuesday morning as the wave continues
to move westward. As it is often the case with these wave... Will
expect most shower thunderstorms activity to concentrate across
the u.S. Virgin islands and eastern portions of pr with
significantly less activity over the western half of the big
island. Models show an upper level low developing within the
upper trough through the end of the week. Although this feature
may shift slowly eastward during this period, upper level
divergence diffluence associated with it should remain over the
eastern caribbean. This will keep the region under unstable
conditions which, combined with ample moisture and local effects,
should continue to enhance the development of showers thunderstorms.

Decided to keep scattered to numerous showers and isolated
thunderstorms Tuesday with a gradual decrease on Wednesday as a
slightly drier air mass moves into the eastern caribbean.

Long term... Thursday through Tuesday... The mid upper level
trough should continue across the eastern caribbean keeping all
areas from pr eastward under rather unstable conditions. The only
limiting factor would be a drier air mass over the region. Still
upper level dynamics could be strong enough to support the
development of the tipical afternoon convection across
western interior pr and nighttime and early morning showers over
the u.S. Virgin islands and eastern pr at least through the
upcoming weekend. Another tropical wave could approach the region
by Sunday... However long range models indicate that this wave
should remain as a low latitude wave with no significant impact
over the local area. The upper trough should begin to shift east
with an upper ridge building across the eastern caribbean by the
beginning of next week. Although this is a long range forecast
with a great deal of uncertainty... Convective activity should be
kept at a minimum with strong subsidence at the mid upper level
over the local area.

Aviation... Shra expected for the rest of this afternoon around the terminals in
pr, which can cause brief moments of MVFR conditions, particularly
for tjsj, tjmz, and tjbq. Vcsh possible for tist tisx this afternoon
and tonight. Winds from the east to ese at 10-15kt with occasional
gusts. Weather to improve after 29 23z. Overnight weather to cause
vcsh across the usvi terminals and tjsj. Winds to decrease to 5-10kt
but continued from the east to ese.

Marine... Tropical wave should move west of the local waters
tonight, however showers and thunderstorms should still impact
local waters tonight and Tuesday. Seas are expected to remain
at or below 6 feet and winds at 15 knots or less most
areas... Except 15 to 20 knots over the caribbean and mona passage
waters due to the proximity of the wave. Mariners are advice to
exercise caution as winds and seas could be locally higher in the
vicinity of thunderstorms.

Preliminary point temps pops
Sju 77 88 76 87 50 50 20 40
stt 78 86 76 86 60 60 50 40

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Ds
long term... .Rgh


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
YABP4 - 9754228 - Yabucoa Harbor, PR 5 mi42 min NE 1 G 2.9
JOXP4 - Jobos Bay Reserve, Puerto Rico 18 mi57 min NNE 1.9 80°F 1020 hPa73°F
ESPP4 - 9752695 - Esperanza, PR 23 mi42 min E 4.1 G 7 81°F 84°F1019.7 hPa (+1.5)
VQSP4 - 9752619 - Isabel Segunda, Vieques, PR 25 mi42 min ESE 2.9 G 6 80°F
FRDP4 - 9753216 - Fajardo, PR 27 mi42 min ENE 11 G 12 82°F 77°F
41056 29 mi42 min ENE 9.7 G 12 83°F 83°F3 ft1019.7 hPa (+1.4)
SJNP4 - 9755371 - San Juan, PR 34 mi42 min E 12 G 14 80°F 82°F1020.3 hPa (+1.8)
42085 - Southeast of Ponce, PR 35 mi42 min ENE 12 G 14 85°F 83°F4 ft1018.4 hPa (+1.4)
41053 - San Juan, PR 35 mi42 min E 16 G 19 80°F 82°F3 ft1019.6 hPa (+1.8)
CLBP4 - 9752235 - Culebra, PR 37 mi42 min 82°F 84°F1020 hPa (+1.5)

Wind History for Yabucoa Harbor, PR
(wind in knots)    EDIT      (on/off)   Help
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
Last
24hr
NW1
W1
N2
N4
NW1
--
NW2
NE3
NW1
NE8
G12
NE10
G14
E4
G11
NE7
G11
NE8
G11
NE5
G8
NE7
G10
NE7
NE9
G13
NE11
G16
NE6
G9
NE4
NE6
G10
N2
G8
NE5
G13
1 day
ago
SW4
W1
NW2
W1
NW1
NW1
--
W2
W1
NE4
G7
E6
E8
G11
E10
G14
E10
G13
NE8
G13
E8
G11
NE8
G13
E9
G13
NE5
G10
NE9
G13
NE2
G7
NE9
G13
NE4
G9
N1
2 days
ago
NE4
NE8
G12
NE4
G10
NE5
G9
NE2
G5
NE3
G6
E4
G8
NE3
NE4
G7
NE6
G9
NE8
G12
E8
G12
E8
G12
E7
G12
E9
G12
E9
G12
E10
G13
E5
G8
E6
G10
NE5
NE4
NE3
G6
N4
NW2

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR30 mi46 minE 89.00 miThunderstorm Rain78°F72°F82%1020.4 hPa

Wind History from JSJ (wind in knots)
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
Last 24hrE5E5E6E6SE5CalmSE5S3SE5E7E9
G18
CalmNE10E9E7E10E10E7E8E9E8E6E8E8
1 day agoE8SE5E4CalmCalmCalmCalmCalmE5E6E9NE15NE17E18
G23
E19E17E17E15E11E13E11E8E8E7
2 days agoE4E4E4SE4SE3CalmSE3E5E8E12E10NE14NE17NE15NE17
G21
E19NE15E13E12E11E10E11E8E8

Tide / Current Tables for Puerto Maunabo, Puerto Rico
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Puerto Maunabo
Click for Map
Mon -- 12:07 AM AST     0.68 feet High Tide
Mon -- 05:47 AM AST     Sunrise
Mon -- 09:41 AM AST     Moonrise
Mon -- 03:24 PM AST     -0.23 feet Low Tide
Mon -- 06:54 PM AST     Sunset
Mon -- 10:56 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.70.60.60.60.50.40.30.20.10.1-0-0.1-0.2-0.2-0.2-0.2-0.2-0.10.10.20.40.50.6

Tide / Current Tables for Vieques Passage, Puerto Rico Current
   EDIT      (on/off)   Help   One Week of Data
Vieques Passage
Click for Map
Mon -- 01:20 AM AST     0.88 knots Max Flood
Mon -- 04:28 AM AST     -0.00 knots Slack
Mon -- 05:46 AM AST     Sunrise
Mon -- 07:59 AM AST     -1.08 knots Max Ebb
Mon -- 09:40 AM AST     Moonrise
Mon -- 11:39 AM AST     0.00 knots Slack
Mon -- 02:27 PM AST     0.68 knots Max Flood
Mon -- 05:32 PM AST     -0.00 knots Slack
Mon -- 06:53 PM AST     Sunset
Mon -- 08:16 PM AST     -0.55 knots Max Ebb
Mon -- 10:55 PM AST     Moonset
Mon -- 10:57 PM AST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.90.80.60.2-0.2-0.7-1-1.1-1-0.7-0.30.10.50.70.70.50.2-0.1-0.4-0.5-0.5-0.30

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 (23,6,7,8)
      (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.