Thursday, April26, 2018 L-36.com


Marine Weather and Tides
Wilmington Island, GA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:40AMSunset 8:02PM Thursday April 26, 2018 9:33 AM EDT (13:33 UTC) Moonrise 3:51PMMoonset 3:54AM Illumination 85% Phase: Waxing Gibbous; Moon at 11 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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AMZ354 Waters From Savannah Ga To Altamaha Sound Ga Out 20 Nm, Including Grays Reef National Marine Sanctuary- 919 Am Edt Thu Apr 26 2018
Rest of today..S winds 5 to 10 kt, increasing to 10 to 15 kt late. Seas 2 to 3 ft.
Tonight..S winds 10 to 15 kt, becoming sw after midnight. Seas 3 to 4 ft.
Fri..SW winds 10 to 15 kt. Seas 3 ft, subsiding to 2 ft in the afternoon.
Fri night..SW winds 5 to 10 kt, becoming W after midnight. Seas 2 ft.
Sat..NW winds 5 to 10 kt, becoming sw in the afternoon. Seas 2 ft.
Sat night..SW winds 5 to 10 kt, becoming W after midnight. Seas 2 ft.
Sun..NE winds 5 to 10 kt. Seas 2 ft.
Sun night..E winds 5 to 10 kt. Seas 2 ft.
Mon..NE winds 10 to 15 kt. Seas 3 to 4 ft.
Mon night..E winds 5 to 10 kt. Seas 3 to 4 ft.
AMZ300 919 Am Edt Thu Apr 26 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Dry cold fronts will move through the region Friday night and again Saturday night. High pressure will then prevail through next week.

7 Day Forecast for Marine Location Near Wilmington Island, GA
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location: 32, -81     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 261114
afdchs
area forecast discussion
national weather service charleston sc
714 am edt Thu apr 26 2018

Synopsis
Dry cold fronts will move through the region Friday night and
again Saturday night. High pressure will then prevail through
next week.

Near term through tonight
Through tonight: the main forecast problems resides in the
prognostication of timing and intensity of convective rains late
in the day and this evening. This morning, we expect dry
weather to prevail with a gradual increase in high clouds along
with some patches of CU and stratocu. Temps will warm into the
mid and upper 70s by early in the afternoon. Highs should top
out in the upper 70s to lower 80s most areas, warmest southern
ga areas. During the middle to latter part of the afternoon, a
mid level cut-off low with cold -20c temps at 500 mb will cross
the northern half of alabama, while mid to upper flow
strengthens and backs across our forecast area. Models agree
that the most potent upper forcing will pass to our west and
northwest from 21z today to 03z this evening. The attendant band
of enhanced 850 mb to 500 mb moisture is progged to brush our
inland ga zones just prior to 00z and then glance our NW tier of
sc zones this evening. This is where we keep our higher rain
chances. The upper low will tend to dampen later today, then
open up and lift into the western carolinas by 06z.

Pre-dawn cams output suggests a leading band of showers and
perhaps lower-topped tstms will approach out western ga zones
in the 22z-00z time frame then lose strength initially. Our
surface dew points will likely be in the mid 50s and perhaps
even mix out even a bit more ahead of this system, thus model
potential for substantial CAPE looks feeble. More prominent
mid level height falls look to skirt through our zones north
of i-16 and west of i-95 between 23z and 03z and this looks
like the window for a few of our northwest zones to see a
potential for isolated strong to severe thunderstorms. There
could be a brief window where some elevated dcapes values exist
adjacent to the csra where strongly forced multicells may
produce some significant but localized convective winds.

Overall, we think our risk for organized severe convection looks
low due to the overall lack of progged instability. The area
from metter to hampton and allendale during the early evening
hours looks to be our region of most concern. We did not make
significant changes to our pops with rain chances inland closer
to sunset and chance pops peaking in the early evening, lowest
risk for rain closer to the immediate coast.

Disorganized surface low pressure will lift northeast across the
inland carolinas overnight with a slot of dry air aloft to
end all chances of convective rains after midnight. Skies will
become partly cloudy with enough of a gradient to suggest some
light southwest breezes linger many areas and lows reaching the
mid upper 50s inland to the lower 60s along the immediate coast.

Short term Friday through Sunday
Cannot completely rule out a brief isolated shower or two within a
surface-700 mb trough cyclonic flow regime Friday. However, moisture
remains too limited to justify any mention of precipitation.

Otherwise, expect near normal high temps in the upper 70s around 80f
away from the coast.

An upper trough and associated dry surface cold front will cross the
region Friday night. In the wake of this cold fropa, drier air will
spread across the region Saturday. However, downslope flow ahead of
another approaching cold front will help push temps above normal,
into the lower 80s at many locations away from the beaches.

Another dry cold front will cross the region Saturday night early
Sunday, and somewhat cooler high pressure will build from the north.

High temps Sunday will then range from the lower mid 70s north to
around 80f near the altamaha river.

Long term Sunday night through Wednesday
High pressure and dry conditions will prevail next week. High temps
mainly in the 70s Monday will give way to gradually warming
temperatures through the remainder or the week. By Wednesday
Thursday, high temperatures in the 80s will become common away from
the coast. Overnight inland lows ranging from the upper 40s lower
50s Sunday night will moderate to the upper 50s lower 60s by the end
of this period. Persistent onshore flow will maintain cooler daytime
high temps and milder nighttime lows on the beaches.

Aviation 12z Thursday through Monday
Vfr at ksav kchs through 12z Friday. Isolated to scattered
convective rains are possible between 02z and 06z but we opted
to omit any mentions as models show the bulk of the precip
skirting by to the northwest at that time.

Extended aviation outlook:VFR.

Marine
Weak offshore flow early this morning should brief go variable
before becoming south later this morning. A S to sse flow will
mainly be 10 kt or less offshore until a slight late day uptick
when a low pressure area approaches from the west. The flow
will veer SW tonight with some modest surging off the ga coast
after midnight. Winds should increase to 15-20 kt before
becoming more west around daybreak. Seas should average 2 to 4
ft through tonight, highest well offshore.

Friday through Tuesday: winds seas should remain below SCA levels
through the weekend. In the wake of a dry cold front Sunday,
northeast winds could surge as high pressure builds into the waters,
but latest guidance suggests that winds will remain below 25 kt and
seas will remain below 6 ft all areas. Early next week,
strengthening long fetch onshore flow should support elevated seas,
perhaps as high as 5-6 ft beyond 20 nm.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term...

short term... Spr
long term... Spr
aviation...

marine...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 6 mi45 min WNW 4.1 G 5.1 63°F 66°F1012.3 hPa
41033 37 mi145 min W 5.8 G 7.8 63°F 65°F1010.9 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 42 mi43 min W 1.9 G 1.9 66°F 66°F2 ft1012.1 hPa (+1.2)58°F
SAXG1 - Sapelo Island Reserve, GA 43 mi93 min W 2.9 62°F 1012 hPa (+1.0)60°F
ACXS1 - ACE Basin Reserve, SC 48 mi108 min Calm 61°F 57°F

Wind History for Fort Pulaski, GA
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E20
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hunter U. S. Army Airfield, GA8 mi37 minW 410.00 miFair63°F57°F81%1011.4 hPa
Savannah-Hilton Head International Airport, GA14 mi40 minW 510.00 miOvercast63°F55°F76%1012.1 hPa
Hilton Head Island, Hilton Head Airport, SC22 mi43 minWSW 510.00 miClear64°F57°F78%1012.2 hPa

Wind History from SVN (wind in knots)
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Last 24hrW9W9W13
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W12W8W5W8W5W4SW4W5W4CalmSW4CalmCalmCalmW4
1 day agoW7W7W8
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W11W9SW8W7W4--SW7W7W6W6SW6W7SW7SW6W8W8
2 days agoE17
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SE10SE7SE8SE6SE7E9SE8SE6SE7SE7SE5SE6S5S4S3SW4SW6SW5SW4SW10
G14
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Tide / Current Tables for Savannah Sheraton Resort Hotel, Wilmington River, Georgia
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Savannah Sheraton Resort Hotel
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Thu -- 12:02 AM EDT     -0.17 feet Low Tide
Thu -- 04:53 AM EDT     Moonset
Thu -- 06:08 AM EDT     8.35 feet High Tide
Thu -- 06:43 AM EDT     Sunrise
Thu -- 12:29 PM EDT     -0.31 feet Low Tide
Thu -- 04:51 PM EDT     Moonrise
Thu -- 06:47 PM EDT     8.59 feet High Tide
Thu -- 08:00 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.20.424.16.27.78.386.85.131.1-0.2-0.1135.27.18.38.67.96.44.42.1

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
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Thu -- 12:54 AM EDT     0.01 knots Slack
Thu -- 03:37 AM EDT     2.16 knots Max Flood
Thu -- 04:53 AM EDT     Moonset
Thu -- 06:42 AM EDT     Sunrise
Thu -- 07:14 AM EDT     -0.00 knots Slack
Thu -- 10:45 AM EDT     -2.28 knots Max Ebb
Thu -- 01:18 PM EDT     0.00 knots Slack
Thu -- 04:06 PM EDT     2.06 knots Max Flood
Thu -- 04:50 PM EDT     Moonrise
Thu -- 07:44 PM EDT     -0.00 knots Slack
Thu -- 08:00 PM EDT     Sunset
Thu -- 11:17 PM EDT     -2.49 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.30.11.42.12.11.91.30.3-0.9-1.6-2.1-2.3-1.7-0.40.91.82.121.60.9-0.3-1.3-2-2.5

Weather Map and Satellite Images
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wmap_A
GOES Local Image of Southeast    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 (9,2,3,4)
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Ground Weather Radar Station Charleston, SC
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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.