Wednesday, February20, 2019 L-36.com


Marine Weather and Tides
Tybee Island, GA

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 6:59AMSunset 6:15PM Wednesday February 20, 2019 4:10 PM EST (21:10 UTC) Moonrise 7:39PMMoonset 7:54AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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- 322 Pm Est Wed Feb 20 2019
Tonight..S winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 5 ft. A chance of showers. Patchy fog this evening. Areas of fog after midnight.
Thu..SW winds 10 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft in the afternoon. A slight chance of showers in the morning. Areas of fog.
Thu night..S winds 5 to 10 kt. Seas 3 to 4 ft. Areas of fog. A slight chance of showers after midnight.
Fri..S winds 5 kt, becoming E in the afternoon. Seas 3 ft. Areas of fog in the morning. A chance of showers.
Fri night..NE winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers.
Sat..E winds 10 kt, becoming se in the afternoon. Seas 3 to 4 ft. A slight chance of showers.
Sat night..S winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers.
Sun..SW winds 15 to 20 kt. Seas 4 to 5 ft. A chance of showers.
Sun night..NW winds 15 kt. Seas 3 to 4 ft.
Mon..NE winds 10 to 15 kt. Seas 2 to 3 ft.
Mon night..NE winds 15 to 20 kt. Seas 3 to 4 ft. A slight chance of showers.
AMZ300 322 Pm Est Wed Feb 20 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A warm front will lift north through the area tonight. A nearly stationary front will then meander in the vicinity through Saturday. A cold front will sweep through from the west late Sunday, followed by high pressure on Monday. A low pressure system could affect the area during the middle of next week.


7 Day Forecast for Marine Location Near Tybee Island, GA
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location: 32.03, -80.85     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 202053
afdchs
area forecast discussion
national weather service charleston sc
353 pm est Wed feb 20 2019

Synopsis
A warm front will lift north through the area tonight. A nearly
stationary front will then meander in the vicinity through
Saturday. A cold front will sweep through from the west late
Sunday, followed by high pressure on Monday. A low pressure
system could affect the area during the middle of next week.

Near term until 6 am Thursday morning
The warm front will move inland during the evening hours, then
quickly lift north of our area. Meanwhile, a cold front will be
approaching our area, becoming located east of the southern
appalachians towards daybreak Thursday. Showers will gradually
decrease during the evening and overnight hours, becoming more
limited to the immediate coast by daybreak Thursday. QPF should
be minimal. Winds will gradually shift to the SE and then the s
overnight. This will usher moisture in the form of much higher
dew points into our area. Models are in great agreement showing
areas of fog forming overnight, both on land and along the
coastal waters moving onshore. There is some uncertainty
regarding the timing. But the fog could become dense and we
wouldn't be surprised if we have to eventually issue dense fog
advisories. Temperatures will be somewhat tricky. The strong
wedge will eventually yield to the warm front, allowing
temperatures to warm up overnight and then maintain themselves.

They should range from the lower 60s near the coast to the mid
50s inland.

Short term 6 am Thursday morning through Saturday
The forecast area will be in the warm sector on Thursday following
the passage of a warm front earlier in the day. The highlight of the
day will be temperatures. Although not expected to reach or exceed
records, highs are forecast to be within a few degrees of those
values generally in the upper 70s low 80s. Otherwise, there is some
weak energy aloft that could help spur some showers inland, but
overall the rain potential doesn't appear impressive. Kept pops
limited to 20-30%. Thursday night, conditions appear favorable for
fog development given the juicy airmass in place (surface dew points
in the low 60s).

On Friday, a wedge of high pressure will build down the mid-atlantic
states, sending a backdoor cold front through the local area. This
front will stall in the vicinity, then lift back north again as a
warm front on Saturday. Upper level forcing is lacking, however
given the boundary lingering nearby through late week, rain chances
will remain in the forecast. Rainfall totals should not amount to
much.

Long term Saturday night through Wednesday
A potent cold front will sweep through the area Sunday afternoon
though only scattered showers are expected to accompany it.

Strong warm air advection ahead of the front will produce high
temps in the upper 70s on Sunday. Somewhat cooler weather is in
store for Monday through Wednesday as a series of high pressure
areas move into the area. A gulf low pressure system could bring
some rain to the area Tuesday and Tuesday night.

Aviation 21z Wednesday through Monday
A warm front will move inland this evening, passing west of the
terminals and causing moisture to increase. Ifr is expected to
prevail, initially due to ceilings. Ceilings are expected to
lower late this evening and overnight. Meanwhile, visibilities
should lower as fog forms. Conditions should start to improve
after daybreak Thursday, but ifr could linger until the end of
the TAF period.

Extended aviation outlook: restrictions in low ceilings and or
reduced visibility likely Thursday night through Saturday.

Marine
Tonight: a warm front along the immediate coast in the evening
will move onshore, then quickly lift north overnight. Winds will
transition to the south and then southwest. Waves will continue
to subside, so the small craft advisory should be allowed to
expire for the charleston waters at the advertised time.

However, seas will take longer to subside across the ga waters
beyond 20 nm and that advisory will continue through the night.

Sea fog: southerly winds late tonight will usher higher dew points
into the area. This moisture moving over the cooler shelf waters
could cause areas of dense fog to form and marine dense fog
advisories may be needed. This threat will persist into Thursday
and Thursday night. By midday Friday the winds will be
northeast which is less favorable.

Thursday through Monday: southerly winds on Thursday will become
northeast late Friday as a backdoor cold front drops through the
area. A tightened gradient across the charleston county waters could
result in marginal SCA conditions for a short period Friday night.

The aforementioned front will then lift back north Saturday, veering
the winds to the south. More widespread SCA conditions are possible
Sunday ahead of a cold front.

Tides coastal flooding
This evening's high tide is the lower of the two for the day.

The wind direction is forecasted to shift towards the south and
ease, but residual anomalies could allow the tide to briefly
approach minor coastal flooding advisory criteria at charleston.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 1 pm est Thursday for amz374.

Small craft advisory until midnight est tonight for amz350.

Near term...

short term...

long term... Jrl
aviation...

marine...

tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 3 mi59 min E 5.1 G 5.1 60°F 56°F1019.2 hPa
41033 29 mi63 min NNE 5.8 G 9.7 58°F 1019 hPa
ACXS1 - ACE Basin Reserve, SC 42 mi86 min N 1.9 62°F 1020 hPa58°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 44 mi81 min NNE 7.8 G 9.7 59°F 58°F5 ft1018.6 hPa (-2.2)58°F
SAXG1 - Sapelo Island Reserve, GA 48 mi131 min E 4.1 66°F 1019 hPa (-2.0)63°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilton Head Island, Hilton Head Airport, SC15 mi81 minNNE 65.00 miLight Drizzle63°F59°F88%1019.3 hPa
Hunter U. S. Army Airfield, GA16 mi2.2 hrsN 33.00 miLight Drizzle62°F59°F91%1018.9 hPa
Savannah-Hilton Head International Airport, GA20 mi78 minNNE 56.00 miLight Rain Fog/Mist61°F59°F93%1019.1 hPa

Wind History from HXD (wind in knots)
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1 day agoCalmSW3CalmCalmCalmCalmCalmN7N7N6N4NE6NE6NE10
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2 days agoNE4E4CalmCalmSE3CalmCalmS8S11
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Tide / Current Tables for Tybee Light, Savannah River, Georgia
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Tybee Light
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Wed -- 02:14 AM EST     -1.83 feet Low Tide
Wed -- 07:00 AM EST     Sunrise
Wed -- 07:54 AM EST     Moonset
Wed -- 08:18 AM EST     8.52 feet High Tide
Wed -- 02:43 PM EST     -1.49 feet Low Tide
Wed -- 06:13 PM EST     Sunset
Wed -- 07:38 PM EST     Moonrise
Wed -- 08:46 PM EST     7.89 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.3-0.7-1.8-1.40.435.67.58.58.375.12.80.5-1.1-1.4-0.31.84.26.37.67.97.15.6

Tide / Current Tables for Savannah River Entrance, Georgia Current (2) (expired 1999-12-31)
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Savannah River Entrance
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Wed -- 12:31 AM EST     -3.15 knots Max Ebb
Wed -- 03:47 AM EST     0.00 knots Slack
Wed -- 06:20 AM EST     2.39 knots Max Flood
Wed -- 07:00 AM EST     Sunrise
Wed -- 07:54 AM EST     Moonset
Wed -- 09:32 AM EST     -0.00 knots Slack
Wed -- 01:00 PM EST     -3.38 knots Max Ebb
Wed -- 04:23 PM EST     0.01 knots Slack
Wed -- 06:13 PM EST     Sunset
Wed -- 06:50 PM EST     2.20 knots Max Flood
Wed -- 07:38 PM EST     Moonrise
Wed -- 09:57 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-3-3.1-2.4-1.10.31.62.32.21.60.6-0.6-1.9-3-3.4-3-2-0.60.91.92.21.81-0.1-1.3

Weather Map and Satellite Images
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GOES Local Image of    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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Wind Forecast for Charleston, SC (16,3,4,5)
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Ground Weather Radar Station Charleston, SC
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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.