Thursday, November23, 2017 L-36.com


Marine Weather and Tides
Hardeeville, 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 7:00AMSunset 5:22PM Thursday November 23, 2017 10:56 PM EST (03:56 UTC) Moonrise 11:02AMMoonset 9:44PM Illumination 29% Phase: Waxing Crescent; Moon at 5 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- 932 Pm Est Thu Nov 23 2017
.small craft advisory in effect through Friday morning...
Tonight..NE winds 20 to 25 kt, becoming N 15 to 20 kt. Seas 4 to 6 ft. A slight chance of showers.
Fri..N winds 15 to 20 kt, becoming ne 10 to 15 kt in the afternoon. Seas 4 to 6 ft, subsiding to 3 to 4 ft in the afternoon. A slight chance of showers.
Fri night..N winds 5 to 10 kt. Seas 3 to 4 ft.
Sat..W winds 5 to 10 kt. Seas 2 to 3 ft.
Sat night..NW 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 10 to 15 kt. Seas 2 to 3 ft.
Mon..NE winds 10 to 15 kt. Seas 2 ft.
Mon night..NE winds 10 kt. Seas 2 ft.
Tue..NE winds 10 kt. Seas 1 foot.
Tue night..E winds 5 kt. Seas 1 foot.
AMZ300 932 Pm Est Thu Nov 23 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Low pressure will track along the southeast coast tonight into Friday. A cold front will shift through the area late Saturday night, followed by dry high pressure through the middle of next week.

7 Day Forecast for Marine Location Near Hardeeville, SC
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location: 32.3, -81.12     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 240253
afdchs
area forecast discussion
national weather service charleston sc
953 pm est Thu nov 23 2017

Synopsis
Low pressure will track along the southeast coast tonight into
Friday. A cold front will shift through the area late Saturday
night, followed by dry high pressure through the middle of next
week.

Near term until 6 am Friday morning
Secondary cyclogenesis is ongoing off the florida east coast
with weak low pressure (1009 hpa) centered about 30 nm north-
northeast of CAPE canaveral. The primary low (1007 hpa) is still
located just north of tampa bay, but this low should dissipate
over the next few hours as the secondary low becomes the
dominate one as it treks east northeast off the georgia and
south carolina coast. Most of the measurable rainfall has
shifted offshore, but kclx and surface observations still show
some patches of very light rain or drizzle hugging the coastal
counties. Lowered pops to 20% in this area for the next few
hours, but this activity should end soon as isentropic downglide
takes hold.

Goes-16 fog product shows low clouds filling in across central
georgia and extending northeast into reidsville and statesboro.

These clouds should be fairly short-lived and erode from
northeast-southwest as the core of the strongest isentropic
descent punches southwest. While mostly clear to partly cloudy
skies could reach the far inland zones over the coming hours,
mostly cloudy to cloudy skies will linger across much of the
region through the overnight hours.

Northerly winds will help advect cooler temperatures into the
region tonight as low pressure passes offshore. Most of the high
resolution models are bringing a corridor of upper 30s with a
few mid 30s into the far interior zones prior to daybreak. Given
temperatures are already in the 30s across the south carolina
midlands, these numbers seem reasonable. Plan to lower overnight
temperatures by several degrees for most areas with lows
ranging from the upper 30s well inland to temperatures holding
steady in the lower 50s along the georgia coast. Winds look to
remain too high to support scattered frost (except in highly
sheltered areas), but there will be about a 2-4 hour period for
patchy frost to develop. Will include "patchy frost" for areas
roughly along north of a thrift-sylvania-fairfax-smoaks-saint
george-saint stephen line, but away from lakes marion and
moultrie. In fact, with northerly winds flow over the relatively
warmer waters of lake moultrie, moncks corner may very well end
up warmer than north charleston tonight.

Interestingly, today's synoptic pattern would have been a
classic heavy snow producer for the lowcountry and coastal
empire if enough cold air had been in place. This is typically
the setup that is needed to get heavy snows this far south in
the winter with low pressure crossing the central florida
peninsula. Thankfully, no cold air was in place for this
thanksgiving day!

Short term 6 am Friday morning through Sunday
Friday: an area of low pressure will quickly depart to the northeast
while an h5 shortwave shifts off the southeast coast. The pattern
favors rain and or showers to end over all areas by late morning as
a northeast wind turns to west and pushes the bulk of deep moisture
offshore. A gradual break or clearing in clouds from west to east is
anticipated during the afternoon, which should allow high temps to
rebound into the lower 60s for most areas and potentially middle 60s
south of i-16 in southeast georgia. Dry high pressure will then
build into the area Friday night. Friday night lows should range in
the lower 40s inland to mid upper 40s closer to the coast.

Saturday and Sunday: high pressure will slide east over the area
this weekend with a west southwest flow contributing to noticeably
warmer temps on Saturday ahead of a backdoor cold front approaching
from the north. In general, Saturday afternoon highs should peak in
the upper 60s for most areas. A large mid upper lvl trough of low
pressure will expand over the east CONUS Saturday night, helping
push a dry backdoor cold front south into the area late Saturday
night into early Sunday. Temps will be cooler post FROPA as sfc
winds turn northerly and cold air advection takes place. In general,
Sunday afternoon high temps should peak in the lower 60s in
southeast south carolina and middle 60s in southeast georgia.

Long term Sunday night through Thursday
Dry high pressure will prevail Sunday night through Wednesday. A
cold front may approach late Wednesday or on Thursday,
potentially bringing scattered showers to the area. Sunday and
Monday will be slightly cooler due to the influence of cold high
pressure. Temps warm up during mid week as the high shifts east
and southerly flow develops.

Aviation 03z Friday through Tuesday
Primary concerns:
* timing of clouds lifting toVFR at ksav
lifr CIGS at ksav should lift to MVFR and eventuallyVFR this
evening as rain exits the region and drier air to the north
filters in. Timing is a bit uncertain, but most guidance points
to lifting above alternate minimums by 01z, if not sooner
conditions returning toVFR by mid-evening, roughly 03-04z.

Confidence is low given timing uncertainties. Amendments will
be issued as needed. At kchs, CIGS are already beginning to
respond with recently rising back intoVFR thresholds. Could
still see a period of MVFR this evening, but no impacts are
expected.

Extended aviation outlook:VFR conditions should prevail at both
terminals Friday afternoon through Tuesday.

Marine
Tonight: surface low pressure will track offshore while high
pressure is to our north. The interaction between these two
features will increase the surface pressure gradient across the
coastal waters, leading to gusty NE winds and hazardous seas.

Wave heights 6 ft and greater are forecasted beyond 10 nm, so
small craft advisories remain in effect for all of the coastal
waters.

A northeast flow will persist into Friday between high pressure
inland and a low pressure system tracking along near the southeast
coast. A tightened pressure gradient over the area early favors the
continuation of small craft advisories for nearshore waters into
late morning Friday, while high seas in offshore georgia waters
favor a small craft advisory into early Friday night. In general
northeast winds will gust around 25 kt while seas build as high as 4-
6 ft in nearshore waters and 6-8 ft in offshore georgia waters. High
pressure will then build over the coastal waters this weekend,
favoring northeast winds to become primarily offshore. Wind speeds
and seas will likely remain below small craft advisory levels
Saturday into early next week, but a backdoor cold front will
approach the waters from the north late Saturday into early Sunday,
causing winds to temporarily increase to 15-20 kt.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until noon est Friday for amz350-352-354.

Small craft advisory until 1 am est Saturday for amz374.

St


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 22 mi44 min NNE 11 G 13 49°F 61°F1016.1 hPa
41033 38 mi48 min NNE 14 G 25 49°F 62°F1014.8 hPa
ACXS1 - ACE Basin Reserve, SC 40 mi71 min N 1.9 46°F 1016 hPa44°F
SAXG1 - Sapelo Island Reserve, GA 62 mi56 min N 15 52°F 1015 hPa (+1.0)52°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Savannah-Hilton Head International Airport, GA12 mi63 minNE 810.00 miOvercast48°F45°F89%1016.1 hPa
Hunter U. S. Army Airfield, GA19 mi60 minNE 710.00 miOvercast48°F45°F90%1015.5 hPa
Hilton Head Island, Hilton Head Airport, SC23 mi61 minNNE 1010.00 miOvercast48°F46°F94%1016.3 hPa

Wind History from SAV (wind in knots)
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Last 24hrN3NE5NE9NE6NE6NE8NE7NE5NE6NE7NE7NE6NE6NE6NE7N4NE6N6N10N6N9N6N7NE8
1 day agoCalmCalmNW4SW3W7NW5W4W5NW7NW4NW7NW6NW6N43N7NW6W5CalmSW3W3CalmCalmN3
2 days agoNE7NE6N4NE4N3NE4NE4NE3NE4E5NE6NE7E5E7E10E7E6NE5N3N3N4NE3NW4NW5

Tide / Current Tables for Purrysburg Landing, Savannah River, South Carolina
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Purrysburg Landing
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Thu -- 12:23 AM EST     2.83 feet High Tide
Thu -- 07:01 AM EST     Sunrise
Thu -- 08:01 AM EST     0.33 feet Low Tide
Thu -- 11:01 AM EST     Moonrise
Thu -- 12:45 PM EST     3.05 feet High Tide
Thu -- 05:20 PM EST     Sunset
Thu -- 08:49 PM EST     0.39 feet Low Tide
Thu -- 09:43 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.82.82.62.31.81.30.80.40.30.61.52.42.932.92.72.31.81.30.80.50.40.91.8

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Thu -- 02:21 AM EST     -1.43 knots Max Ebb
Thu -- 05:47 AM EST     0.00 knots Slack
Thu -- 06:59 AM EST     Sunrise
Thu -- 08:25 AM EST     1.73 knots Max Flood
Thu -- 11:00 AM EST     Moonrise
Thu -- 12:17 PM EST     -0.00 knots Slack
Thu -- 03:11 PM EST     -1.66 knots Max Ebb
Thu -- 05:20 PM EST     Sunset
Thu -- 06:37 PM EST     0.00 knots Slack
Thu -- 09:00 PM EST     1.63 knots Max Flood
Thu -- 09:43 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.1-0.9-1.4-1.4-1.1-0.60.21.11.71.61.20.70.2-0.6-1.4-1.6-1.6-1.3-0.60.41.31.61.40.9

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 (22,6,7,8)
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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.