Wednesday, November22, 2017 L-36.com


Marine Weather and Tides
Port Royal, SC

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 6:58AMSunset 5:20PM Wednesday November 22, 2017 3:28 PM EST (20:28 UTC) Moonrise 10:15AMMoonset 8:49PM Illumination 17% Phase: Waxing Crescent; Moon at 4 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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AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 1219 Pm Est Wed Nov 22 2017
This afternoon..NE winds 10 kt. Seas 3 to 4 ft.
Tonight..NE winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft, building to 4 to 5 ft after midnight. A slight chance of showers after midnight.
Thu..NE winds 15 kt with gusts to 20 kt. Seas 4 to 5 ft. A chance of showers.
Thu night..NE winds 15 to 20 kt. Seas 4 to 6 ft. A chance of showers.
Fri..NE winds 15 to 20 kt. Seas 4 to 6 ft, subsiding to 4 to 5 ft in the afternoon. A chance of showers.
Fri night..N winds 10 to 15 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft after midnight. A chance of showers.
Sat..NW winds 10 to 15 kt. Seas 3 to 4 ft.
Sat night..W winds 10 to 15 kt. Seas 2 to 3 ft.
Sun..N winds 10 to 15 kt. Seas 2 to 3 ft.
Sun night..N winds 15 to 20 kt. Seas 2 to 3 ft.
AMZ300 1219 Pm Est Wed Nov 22 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will gradually build across the area today. A series of low pressure systems will track from the northern gulf of mexico up the southeast coast tonight through Friday night. A cold front will shift through the area Saturday night, followed by dry high pressure through the middle of next week.

7 Day Forecast for Marine Location Near Port Royal town, SC
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location: 32.33, -80.47     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 221532
afdchs
area forecast discussion
national weather service charleston sc
1032 am est Wed nov 22 2017

Synopsis
High pressure will gradually build across the area today. A
series of low pressure systems will track from the northern
gulf of mexico up the southeast coast tonight through Friday
night. A cold front will shift through the area Saturday night,
followed by dry high pressure through the middle of next week.

Near term through tonight
Update: satellite imagery, surface observations, and webcams
indicate the dense fog has ended across the area. All advisories
have expired. Some patchy fog may remain in some locations for
the next hour, but this will burn off as the day heats up. High
pressure to the north is changing the winds to the nne, ushering
drier conditions into the area, which will lead to clearing
skies through this afternoon. Made some minor adjustments to the
temperature and sky trends, but the general forecast remains on
track. High temperatures are forecast to range from around 70
degrees across sc to the low 70s across SE ga.

Tonight: the sfc pattern will feature large high pressure
centered over WV and low pressure developing off the gulf coast
of fl. Moisture will gradually increase across the forecast area
tonight. However, low level isentropic lift appears to remain
south of the CWA through the overnight period. This forecast
package will feature much lower values of pops and keeps the
forecast dry until the predawn hours. Low temperatures are
forecast to range from the mid 40s across sc to the low 50s
across SE ga.

Short term Thursday through Saturday
The deep upper shortwave over the northern gulf of mexico on
Thursday will very slowly shift east and northeast, eventually
clearing our area on Saturday. A surface low will lift through
northern florida on Thursday, spreading atlantic moisture into
the area from the southeast. With high pressure firmly
entrenched inland, isentropic ascent will ensue, allowing light
showers to begin spreading in from the southeast during the
afternoon. The greatest QPF and overall coverage is expected
Thursday night when the center of the low is just off the sc ga
coast. However, a secondary low will spread another round of
rain into the area Friday and Friday night, primarily affecting
the coastal waters and land areas closer to the coastline. Both
days will feature below-normal temperatures in the upper 50s to
lower 60s.

By Saturday we expect clearing skies as the upper trough axis
shifts east and high pressure builds from the west. Downslope
flow will help push high temps into the mid upper 60s.

Long term Saturday night through Tuesday
Dry high pressure will prevail Saturday night through the middle
of next week. Cooler temps will be the rule Sunday into Monday
due to cold air advection, but a quick warm-up occurs mid-week
as the surface high shifts offshore.

Aviation 15z Wednesday through Sunday
Satellite imagery and surface observations show clouds gradually
clearing across the forecast area. As high pressure continues to
bring drier air in from the north, conditions will improve.

MVFR is expected over the next few hours withVFR by this
afternoon and tonight.

Extended aviation outlook: an extended period of MVFR ifr
conditions expected from late Thursday night through Friday
night as low pressure moves up the coast.VFR conditions
should prevail at both terminals Saturday through Monday.

Marine
Today through tonight: a cold front will move through the
coastal waters this afternoon, causing a wind shift to the nne.

Building high pressure centered over WV will increase the
pressure gradient tonight, allowing gusts to approach 25 kt.

As a result, seas will build. Waves by tonight are forecasted
to be 3-5 feet within 20 nm. For the ga waters beyond 20 nm, waves
of 5 to maybe 6 feet are possible, meaning a small craft
advisory may be needed.

A northeast flow will continue Thursday through Friday night as
high pressure lingers inland and a series of surface lows move
up the coast. Wind speeds are expected to be near small craft
advisory level during this time, while seas are also expected to
climb to as high as 6 ft. Expansive high pressure will build
over the waters during the weekend into early next week.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term...

short term...

long term... Jrl
aviation...

marine...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41033 5 mi81 min SW 7.8 G 12 62°F 63°F1013.8 hPa
ACXS1 - ACE Basin Reserve, SC 16 mi104 min N 2.9 70°F 1015 hPa58°F
FPKG1 - 8670870 - Fort Pulaski, GA 31 mi41 min NNE 5.1 G 8 67°F 62°F1015.2 hPa
FBIS1 - Folly Island, SC 39 mi29 min N 9.9 G 12 66°F 1015.6 hPa (-1.0)56°F
CHTS1 43 mi41 min N 4.1 G 6 67°F 61°F1015.1 hPa

Wind History for Fort Pulaski, GA
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NE14
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G17
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G16

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beaufort County Airport, SC10 mi54 minNW 87.00 miPartly Cloudy68°F57°F69%1014.9 hPa
Hilton Head Island, Hilton Head Airport, SC14 mi39 minNNW 510.00 miPartly Cloudy70°F57°F64%1015.2 hPa
Beaufort, Marine Corps Air Station, SC17 mi93 minNW 710.00 miA Few Clouds72°F60°F66%1015.1 hPa

Wind History from HXD (wind in knots)
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Last 24hrNE7NE7NE7W43CalmCalmS7S6SW8W844
G10
5
G12
--NW10NW8N8N8N8N9N5N5N5
1 day agoNE6NE6NE6N5NE6NE5NE6NE7NE6NE9NE7NE5NE4N6--N5NE5NE5NE5NE7NE7NE7NE7NE7
2 days ago----W6W6W4664CalmNW4NW6N7
G12
N9N6--N8N6N6N6N6--NE6NE6NE6

Tide / Current Tables for Fripps Inlet, Hunting Island Bridge, St. Helena Sound, South Carolina
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Fripps Inlet
Click for Map
Wed -- 03:35 AM EST     0.70 feet Low Tide
Wed -- 06:57 AM EST     Sunrise
Wed -- 10:00 AM EST     6.34 feet High Tide
Wed -- 10:14 AM EST     Moonrise
Wed -- 04:19 PM EST     0.87 feet Low Tide
Wed -- 05:18 PM EST     Sunset
Wed -- 08:49 PM EST     Moonset
Wed -- 10:15 PM EST     5.50 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
42.81.70.90.81.52.84.25.46.16.36.15.242.81.60.91.11.93.14.35.15.55.3

Tide / Current Tables for Station Creek, County Landing, South Carolina
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Station Creek
Click for Map
Wed -- 03:44 AM EST     0.78 feet Low Tide
Wed -- 06:58 AM EST     Sunrise
Wed -- 10:15 AM EST     Moonrise
Wed -- 10:42 AM EST     7.16 feet High Tide
Wed -- 04:27 PM EST     0.87 feet Low Tide
Wed -- 05:18 PM EST     Sunset
Wed -- 08:50 PM EST     Moonset
Wed -- 10:58 PM EST     6.30 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.33.82.31.10.81.42.645.46.477.16.55.33.72111.734.35.46.16.3

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Charleston, SC (15,3,4,5)
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Ground Weather Radar Station Charleston, SC
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weather_mapweather_map weather_map

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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.