Friday, February22, 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 6:51AMSunset 6:33PM Friday February 22, 2019 3:02 PM AST (19:02 UTC) Moonrise 9:51PMMoonset 9:18AM Illumination 89% Phase: Waning Gibbous; Moon at 18 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
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AMZ742 Coastal Waters Of Northwestern Puerto Rico Out 10 Nm- 958 Am Ast Fri Feb 22 2019
.small craft should exercise caution...
.small craft advisory in effect from 2 pm ast this afternoon through Sunday morning...
Rest of today..Northeast winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds.
Tonight..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. Northeast swell 4 to 5 feet. Isolated showers through the night.
Saturday..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 11 seconds. Northeast swell 4 to 5 feet. Isolated showers.
Saturday night..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 11 seconds. Northeast swell 4 to 5 feet. Isolated showers.
Sunday..Northeast winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Isolated showers.
Monday..Northeast winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 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 10 seconds. Northeast swell 4 to 5 feet. Isolated showers.
AMZ700 958 Am Ast Fri Feb 22 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure will remain north of the region until it weakens on Saturday. In addition, another strong surface high pressure will move over the western atlantic and north of the area late this weekend into early next week. These features will promote a fresh to strong easterly wind flow across the regional waters, Thus generating hazardous marine conditions over the next several days.


7 Day Forecast for Marine Location Near Isabela zona urbana, PR
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location: 18.5, -67.01     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 221459
afdsju
area forecast discussion
national weather service san juan pr
1059 am ast Fri feb 22 2019

Update Breezy conditions and partly cloudy skies prevailed
during the morning hours across the usvi and pr. Early morning
showers left minor rainfall accumulations across the eastern half
of puerto rico. The 12z tjsj upper air sounding indicated the best
moisture just under 6000 ft and a strong inversion above with dry
air through the upper levels. Winds at 20-35 kt from the east-
southeast prevail through 20 kft. For this afternoon, the strong
wind flow will continue to carry at times low level clouds and
passing showers across the islands. Streamers are expected to
develop off the usvi and showers should reach the eastern sections
of pr, a weak sea breeze over the western coast of pr should also
aid in the development of brief showers over western pr. However,
no significant rainfall accumulations are expected.

Aviation MainlyVFR conditions are expected to prevail across
all terminals through the forecast period. However, quick passing
showers could move at times across the local terminals and may
cause tempo MVFR cigs. East to southeast winds will continue
between 15-20 kt with higher gusts through the evening hours.

Marine Wind driven choppy seas will continue across the
regional waters and seas are expected to range between 6-8 feet
across most of the waters. Trade winds between 15-22 kt with
higher gusts will continue to prevail for the next several days.

Small craft advisories continue in effect through the weekend.

There is a high rip current risk for the northern beaches of pr,
culebra and st. Croix.

Prev discussion issued 423 am ast Fri feb 22 2019
synopsis... Mid to upper-level ridge is expected to hold across
the area through at least Monday. This will continue to result in
a mostly stable weather pattern, however, small patches of low-
level moisture may result in some trade wind showers affecting the
area from time to time. Surface high pressure north of the area
will continue to produce breezy conditions through the upcoming
weekend. The ridge aloft is expected to weaken somewhat by the
middle of next week and may allow for better moisture to move
across the area and result in better shower activity.

Short term... Today through Sunday...

a surface high pressure north of the region will prevail through
at least Monday. This will continue to generate windy conditions
with winds expected to range between 15 and 25 mph with higher
gusts. Highest winds expected from the mid morning through the
evening hours.

Pulses of low level moisture will continue to move across the local
area from time to time. This will generate passing showers, mostly
affecting the local waters and the eastern areas of puerto rico.

These showers will be wind driven and therefore, be of short
duration with minor accumulations expected.

Long term... Monday through Saturday...

the ridge aloft will continue to maintain fair weather conditions
on Monday. By Tuesday and Wednesday, model guidance continues to
indicate that the ridge aloft will begin to weaken somewhat as a
deep polar trough moves across the western atlantic. This would
cause a weakening of the trade wind cap and allow for better
moisture pooling across the region through the end of the work
week. If current model guidance continues to hold on its current
solution, the potential exists for better shower activity to
affect the local area starting on Tuesday and continuing through
the end of the work week.

Aviation... MainlyVFR conditions are expected across the terminals
throughout the period. Vcsh -shra are possible across tist tisx tjsj
terminals through 22 09z-14z, which may result in brief MVFR
conditions. A few -shra are also possible across tjmz between 22 16z-
22z. Winds will continue from the e-ene around 10 kts through
22 12z, increasing to 15-20 kts with higher gusts afterwards
through 22 22z.

Marine... Choppy and hazardous wind driven seas between 5 and 8
feet are expected across the regional waters through the upcoming
weekend. As a result, small craft advisories are in effect for
the majority of the regional waters. A high risk of rip currents
is in effect for the northern beaches of pr, culebra, and cramer
park beach in saint croix for today. The rest of the local beaches
have a moderate risk of rip currents. A high risk of rip currents
is expected for the northern beaches of saint thomas starting
this evening.

Fire weather... Recent surface observations indicate that the
vegetation across the southern coastal plains of puerto rico
continue to remain very dry with kdbi values near 600 in cabo
rojo and over 700 in camp santiago. Winds today will continue to
be moderate to strong with speeds ranging between 15 and 25 mph
with higher gusts. A band of low-level moisture, associated with
the remnants of a frontal boundary, will move across the area
during the day and will provide more cloudiness. Therefore,
relative humidity values are expected to be higher than they were
on Thursday but could still drop into the mid to upper 40s for a
few hours later this morning into this afternoon, maintaining the
fire weather risk elevated. Given this scenario, a fire danger
statement (rfdsju) has been issued.

Preliminary point temps pops
Sju 85 74 84 73 40 40 30 20
stt 85 73 84 72 30 20 20 20

Sju watches warnings advisories
Pr... High rip current risk through late Saturday night for culebra-
north central-northeast-northwest-san juan and vicinity-
southeast.

High rip current risk from Saturday morning through late
Saturday night for mayaguez and vicinity.

Vi... High rip current risk through late Saturday night for st croix.

High rip current risk from 6 pm ast this evening through late
Saturday night for st.Thomas... St. John... And adjacent
islands.

Am... Small craft advisory until 8 pm ast Sunday for anegada passage
southward to 17n-atlantic waters of puerto rico and usvi
from 10 nm to 19.5n-caribbean waters of puerto rico from 10
nm to 17n-coastal waters of northern puerto rico out 10 nm-
mona passage southward to 17n.

Small craft advisory until 8 am ast Sunday for coastal waters of
northern usvi and culebra out 10 nm-coastal waters of
southern usvi vieques and eastern puerto rico out 10 nm.

Small craft advisory from 2 pm this afternoon to 8 am ast Sunday
for coastal waters of northwestern puerto rico out 10 nm.

Ds


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AROP4 - 9757809 - Arecibo, PR 16 mi33 min NE 9.9 G 24
PTRP4 16 mi18 min NNE 8 G 17 83°F
41115 - Rincon, Puerto Rico (181) 17 mi33 min 80°F5 ft
MGZP4 - 9759394 - Mayaguez, PR 21 mi39 min 80°F 81°F1018.1 hPa
MGIP4 - 9759110 - Magueyes Islands, PR 37 mi33 min SSE 8 G 12 82°F 78°F1018.6 hPa
SJNP4 - 9755371 - San Juan, PR 47 mi39 min ENE 14 G 21 80°F 79°F1019.3 hPa
41053 - San Juan, PR 48 mi33 min E 18 G 21 79°F 1018.3 hPa

Wind History for Arecibo, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Aquadilla, Rafael Hernandez Airport, PR6 mi73 minE 1010.00 miMostly Cloudy82°F0°F%1020 hPa

Wind History from JBQ (wind in knots)
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E11E6E3------------------E6E9E7E9
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1 day agoE10
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E10E10E9E10E10E6SE6----SE4SE5SE4SE4SE5CalmE10E15
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2 days ago--E20
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E13E9E9E6E4------------SE4E6E7E9E12E16
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Tide / Current Tables for Aguadilla, Crashboat Beach, Puerto Rico
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Mayaguez, Puerto Rico
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Mayaguez
Click for Map
Fri -- 04:42 AM AST     -0.15 feet Low Tide
Fri -- 06:52 AM AST     Sunrise
Fri -- 09:18 AM AST     Moonset
Fri -- 10:56 AM AST     1.45 feet High Tide
Fri -- 05:18 PM AST     -0.02 feet Low Tide
Fri -- 06:32 PM AST     Sunset
Fri -- 09:51 PM AST     Moonrise
Fri -- 11:20 PM AST     1.38 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.10.80.40.1-0.1-0.100.30.71.11.41.41.31.10.80.40.1-000.20.60.91.21.4

Weather Map and Satellite Images
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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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (14,3,4,5)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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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.