Sunday, April30, 2017 L-36.com


Marine Weather and Tides
Jobos, PR

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:56AMSunset 6:46PM Sunday April 30, 2017 12:49 PM AST (16:49 UTC) Moonrise 9:56AMMoonset 11:18PM Illumination 22% 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- 1051 Am Ast Sun Apr 30 2017
.small craft should exercise caution...
Rest of today..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated Thunderstorms through the day. Scattered showers in the afternoon.
Tonight..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers and isolated Thunderstorms.
Monday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers in the morning. Isolated Thunderstorms through the day.
Monday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Tuesday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Wednesday..East winds 15 to 20 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Thursday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
AMZ700 1051 Am Ast Sun Apr 30 2017
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure to the north of the local islands will continue to persist through midweek. This will result in moderate to locally fresh easterly winds across the regional waters. As the surface high shifts eastward, east to southeast winds will prevail by the end of the week. Hazardous wind driven seas and isolated Thunderstorms with areas of heavy rainfall will be likely across the local waters through midweek.

7 Day Forecast for Marine Location Near Jobos, PR
   Hourly   EDIT   Help
location: 17.93, -66.16     debug


Area Discussion for - San Juan, PR
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxca62 tjsj 301614
afdsju
area forecast discussion
national weather service san juan pr
1214 pm ast Sun apr 30 2017

Update
Tjsj 12z RAOB reported a moist and unstable environment favorable
for the development of widespread showers and thunderstorm
activity today. Preliminary rainfall accumulations between
quarter and three inches of rain were estimated along the north
coastline and eastern sections of puerto rico. The maximum
estimates were observed in the the interior sections of sj with
accumulations up to 1.5 inches and in the vicinity of EL yunque
along the sierra de luquillo with values between one and three
inches of rain.

For the rest of today, a very moist and unstable environment will
aid in the development of additional showers and thunderstorms
most of the islands of puerto rico and the u.S. Virgin islands.

Soils are saturated and rivers and small creeks are swollen,
therefore any additional moderate to heavy rain will result in
flooding, sudden river level rises and mudslides. No changes were
made to the inherited forecast.

Aviation
Shra across pr/usvi expected through the fcst prd. Some shra/+shra
could reduce visibilities btwn 3sm-5sm. Bkn-ovc ceiling will
continue at fl020-fl100 through at least 30/23z. Tsra formation is
also possible mainly across pr and the surrounding waters of the
region. MVFR and even ifr conditions with mountain obscurations
can be expected in and around tjsj/tjmz/tjbq in shra/tsra. Low
level winds will continue mainly E at 15-25 kts with higher gusts
til 3023z, dropping at 12 knots or less overnight.

Marine
Mariners should exercise caution due to seas between 4 and 6 feet
and winds between 15 and 20 knots with higher gusts. Satellite
imagery reported lightning activity across the atlantic waters
creating hazardous marine conditions. Stay tuned for any
additional special marine statement or product.

Prev discussion /issued 445 am ast Sun apr 30 2017/
synopsis... Tutt and plenty of moisture across the forecast area
will continue to result in periods of showers and thunderstorms
through at least midweek. As a result, there is a chance of urban
and small stream flooding each day with localized river flooding
also possible. A generally fair weather pattern is expected across
the forecast area by the end of the work week.

Short term... Tonight through Wednesday...

mostly cloudy skies prevailed across puerto rico and the u.S.

Virgin islands overnight. An area of showers and thunderstorms
affected the eastern section of puerto rico. Rainfall accumulation
from one to two inches were estimated by the doppler weather
radar in some localized areas mainly in EL yunque rainforest. For
today, a very moist and unstable environment,will aid in the
development of showers and thunderstorms across the cordillera
central of puerto rico early in the afternoon, with the activity
expected to spread across the western interior and northwest
sections of puerto rico. Heavy rainfall will lead to urban and
small stream flooding. Flash flooding cant be ruled out.

An upper level trough is expected to linger across the local region
enhancing the development of showers and thunderstorms across the
local area through at least Wednesday. Low level moisture is
expected to remain high through this period. As a result, periods
of showers with thunderstorms can be expected mainly each afternoon
across the cordillera central of puerto rico. Soils across puerto
rico are saturated from previous rainfall. Therefore, local and
visitors in puerto rico are urged to stay tuned during the next
few days as the risk for flooding continues high.

Long term... Wednesday afternoon through Sunday...

as the tutt weakens, a mid to upper level ridge is expected to
build across the forecast area from the west. This feature is
expected to hold Thu through at least the upcoming weekend. At
lower levels, as a broad high pressure across the central atlantic
weakens and a boundary moves across the western atlantic, winds
are expected to become more east southeast by the end of the week.

Therefore,still expect periods of showers and isolated thunderstorms
on Wednesday. As the ridge builds and moisture erodes, a fair
weather pattern is then expected to prevail late in the week with
warmer temps under the aforementioned east southeast wind flow.

Aviation... Vcsh are expected across most TAF sites through at
least 30/16z. Tempo MVFR and even ifr conditions with mountain
obscurations can be expected after 30/16z in and around tjsj,
tjmz and tjbq in shra/tsra. Low level winds will be mainly east
at 10 to 15 kts.

Marine... A surface high pressure to the north of the local
islands will continue to persist through midweek to result in
moderate to locally fresh easterly winds. As the surface high
shifts eastward, east to southeast winds will prevail by the
end of the week. Hazardous wind driven seas and isolated
thunderstorms with areas of heavy rainfall will be likely
across the local waters during the rest of the weekend. Seas
up to 6 feet and winds 15 to 20 knots with a moderate risk of
rip currents across most of the local beaches.

Preliminary point temps/pops
Sju 84 75 84 75 / 60 50 50 20
stt 84 74 84 74 / 50 50 50 30

Sju watches/warnings/advisories
Pr... None.

Vi... None.

Am... None.

Short term... Cam
long term... .Cam
aviation...



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
JOXP4 - Jobos Bay Reserve, Puerto Rico 4 mi65 min ENE 2.9 79°F 1019 hPa72°F
YABP4 - 9754228 - Yabucoa Harbor, PR 19 mi50 min NNE 1.9 G 7
SJNP4 - 9755371 - San Juan, PR 37 mi50 min E 15 G 21 80°F 81°F1018.6 hPa (+0.0)
ESPP4 - 9752695 - Esperanza, PR 38 mi50 min E 4.1 G 7 76°F 80°F1017.9 hPa (-0.3)
FRDP4 - 9753216 - Fajardo, PR 40 mi50 min SE 2.9 G 9.9 76°F 71°F
VQSP4 - 9752619 - Isabel Segunda, Vieques, PR 41 mi50 min E 7 G 14 78°F
41056 44 mi50 min E 12 G 16 77°F 80°F5 ft1018.2 hPa (+0.0)
IMGP4 47 mi30 min ESE 12 G 18 83°F
MGIP4 - 9759110 - Magueyes Islands, PR 47 mi50 min SSE 1.9 G 12 84°F 81°F1016.9 hPa (-0.6)
AROP4 - 9757809 - Arecibo, PR 48 mi50 min ESE 6 G 8 75°F

Wind History for Yabucoa Harbor, PR
(wind in knots)    EDIT      (on/off)   Help
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
-12
PM
11
PM
11
PM
12
AM
1
AM
-12
PM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
Last
24hr
NE4
G11
E9
G13
E10
G16
NE5
G10
NE4
G10
N3
G6
N2
N2
G5
NE3
G8
NE3
N2
NE4
G8
NE5
G8
NE3
G8
NW1
E5
G9
NE10
G14
NE10
G16
NE7
G12
NE3
G9
NE5
G11
NE2
G7
1 day
ago
NE4
G8
E8
G13
NE2
G5
NE8
G12
NE1
NE5
G9
NE8
G13
NE6
G12
NE6
G14
NE5
G11
NE4
G9
NE5
NE7
G12
SE12
G22
NE4
G10
W3
G6
NE6
G11
E11
G17
E7
G11
E8
G11
E7
G12
E7
NE7
G12
2 days
ago
E7
G11
E9
G13
NE7
G11
E9
G14
E8
G12
NE5
G9
NE9
G14
NE6
G10
NE9
G13
NE4
G10
NE5
G10
NE5
G11
NE6
G12
NE5
G11
NE4
G8
NE6
G11
NE5
G12
NE8
G14
NE10
G17
E10
G16
E8
G14
E8
G13
E10
G16
NE10
G17

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

Wind History from JPS (wind in knots)
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----------------------------------NE5NE5--NE5----NE5
1 day agoNE5------------------------E8------E5E5NE5--NE5--E10
2 days ago----------------------------------NE5CalmNE5NE5----Calm

Tide / Current Tables for Las Mareas, Puerto Rico
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Las Mareas
Click for Map
Sun -- 02:25 AM AST     0.77 feet High Tide
Sun -- 05:58 AM AST     Sunrise
Sun -- 09:55 AM AST     Moonrise
Sun -- 01:27 PM AST     -0.13 feet Low Tide
Sun -- 06:45 PM AST     Sunset
Sun -- 11:17 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.70.80.80.70.70.60.50.30.20.10-0.1-0.1-0.1-0.1-0.1-00.10.10.20.30.40.5

Tide / Current Tables for Arroyo, Puerto Rico
   EDIT      (on/off)   Help   One Week of Data
Arroyo
Click for Map
Sun -- 03:14 AM AST     0.95 feet High Tide
Sun -- 05:57 AM AST     Sunrise
Sun -- 09:55 AM AST     Moonrise
Sun -- 03:10 PM AST     -0.10 feet Low Tide
Sun -- 06:44 PM AST     Sunset
Sun -- 11:17 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.90.910.90.90.80.80.80.80.70.60.40.2-0-0.1-0.1-0.100.10.20.30.40.6

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 (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.