Friday, July19, 2019 L-36.com


Marine Weather and Tides
Culebra, PR

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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 5:52AMSunset 6:59PM Friday July 19, 2019 7:29 PM AST (23:29 UTC) Moonrise 9:09PMMoonset 8:04AM Illumination 92% 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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AMZ725 Coastal Waters Of Southern Usvi Vieques And Eastern Puerto Rico Out 10 Nm- 406 Pm Ast Fri Jul 19 2019
Tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Numerous showers.
Saturday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Saturday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers.
Sunday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers.
Sunday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers.
Monday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Tuesday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated Thunderstorms. Scattered showers.
Wednesday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers. Isolated Thunderstorms.
AMZ700 406 Pm Ast Fri Jul 19 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A moderate to locally fresh easterly wind flow will hold through the weekend into early next week. A tropical wave will affect the region through late tonight, continuing shower and Thunderstorm activity across the local waters. The next tropical wave is forecast to reach the eastern caribbean waters between Monday and Tuesday.


7 Day Forecast for Marine Location Near Culebra, PR
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location: 18.02, -64.67     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 192108
afdsju
area forecast discussion
national weather service san juan pr
508 pm ast Fri jul 19 2019

Synopsis
The tropical wave that impacted the region today is slowly exiting
the region. However, ample moisture in place for tomorrow will
still drive shower activity, though not as widespread as today.

The next tropical wave is projected to arrive in the latter half
of Monday and into Tuesday, with a third wave expected for later
in the workweek. In between waves, low-level moisture riding in
on the trade winds will help induce isolated showers across the
region.

Short term Tonight through Sunday...

widespread showers are occurring this afternoon across the
forecast area as a tropical wave passes through. This wave has
split into two pieces, and our region is being impacted by the
southern portion. Several locations across mostly western puerto
rico have already easily exceeded 3 inches of rain, but the
significant shower activity is expected to dissipate by this
evening.

This tropical wave will be slow in leaving our area so scattered
showers are likely through the nighttime and morning hours, with
the highest probabilities for eastern puerto rico and the usvi. By
tomorrow afternoon, more showers and thunderstorms are
expected,though forecast model guidance suggests less widespread
and intense showers compared to today. However, with similar lapse
rates and moisture content compared to today, the potential is
there for some ambitious showers to occur and drive localized
flooding on Saturday afternoon, particularly over the
northwestern quadrant of pr. Furthermore, all the rainfall
received today could exacerbate the flooding that might happen
tomorrow under these showers due to many areas with saturated
soils. As another weather variable for tomorrow, saharan dust is
also making a return appearance for the weekend, with dust
concentrations peaking tonight and through tomorrow night,
therefore some haze could be observed.

With high surface pressure dominating to our north, we'll continue
to see breezy easterly winds for the next several days. Patches of
moisture riding the trades will push into the region during the
day on Sunday. Thus, showers are again expected for the morning
hours in eastern puerto rico, but with a better chance for
afternoon showers in western puerto rico. Impacts are expected to
be minimal given weaker lapse rates and a lack of upper level
dynamical support.

Long term Monday through Saturday...

From previous discussion issued at 1106 am ast...

a few patches of low-level moisture will affect the region
through midday on Monday ahead of the first tropical wave expected
to approach the region next week. In the wake of this wave,
relatively drier air accompanied by suspended saharan dust will
move in from the east and dominate the region through late
Wednesday night. However, a few trade wind perturbations will
enhance moisture content and the potential for locally induced
afternoon convection each day. Late Wednesday night and
continuing through early Friday, a second wave and associated
plume of moisture is expected to cross the region. Although model
guidance suggest that the bulk of the aforementioned tropical
waves will remain over the caribbean waters, an increase in
moisture advection, instability and the potential for widespread
showers and thunderstorms can be expected with both waves.

Although weather conditions are expected to improve by Friday
into the weekend, locally induced showers and thunderstorms are
possible each afternoon.

Aviation Shra tsra is expected to continue over western pr
through at least 23z. Additional shra tsra should continue across
the caribbean waters tonight. Some of this activity could affect the
flying area of the usvi eastern pr terminals until 20 06z. Low level
winds will continue from the east between 10-20 kt.

Marine The main threat for the next 24 hours will be isolated
rain showers and associated gusty winds over local waters. High
pressure to our north will continue to drive easterly winds at
10-20 knots with seas mainly between 2-4 feet. A moderate risk
for rip currents exist for Saturday across most regional beaches,
though only the northern beaches of puerto rico maintain that
moderate risk into Sunday, with a low risk elsewhere.

Preliminary point temps pops
Sju 79 90 79 88 40 30 20 30
stt 80 89 79 89 60 10 60 40

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Gl
long term... .Mb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41052 - South of St. John, Virgin Islands 17 mi59 min ENE 9.7 G 12 83°F 1015.6 hPa
CHSV3 - 9751364 - Christiansted Harbor, Virgin Islands 19 mi65 min NNE 4.1 G 7 83°F 84°F1016 hPa
LAMV3 21 mi59 min 82°F 86°F
LTBV3 - 9751401 - Lime Tree Bay, VI 23 mi59 min Calm G 5.1 84°F 85°F1016.6 hPa
CHAV3 - 9751639 - Charlotte Amalie, VI 25 mi59 min 1016.7 hPa
CLBP4 - 9752235 - Culebra, PR 39 mi59 min 85°F1016.9 hPa
ESPP4 - 9752695 - Esperanza, PR 43 mi59 min NNE 2.9 G 6 82°F 85°F1016.9 hPa
41056 45 mi59 min NNE 7.8 G 9.7 81°F 1015.9 hPa

Wind History for Christiansted Harbor, St Croix, VI
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Airport Reports
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Tide / Current Tables for Christiansted Harbor, St Croix, Virgin Islands
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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 Benner Bay, St. Thomas, Virgin Islands
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Benner Bay
Click for Map
Fri -- 05:53 AM AST     Sunrise
Fri -- 08:04 AM AST     Moonset
Fri -- 02:58 PM AST     0.04 feet Low Tide
Fri -- 06:58 PM AST     Sunset
Fri -- 09:10 PM AST     Moonrise
Fri -- 11:50 PM AST     0.88 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.90.80.60.50.40.40.30.30.30.20.20.20.10.100.10.10.20.40.50.70.80.9

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 (19,4,5,8)
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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.