Sunday, January19, 2020
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Marine Weather and Tides
Hardeeville, SC

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:23AMSunset 5:47PM Sunday January 19, 2020 6:17 AM EST (11:17 UTC) Moonrise 2:29AMMoonset 1:32PM Illumination 32% Phase: Waning Crescent; Moon at 24 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- 312 Am Est Sun Jan 19 2020
.small craft advisory in effect until 10 am est this morning...
Today..W winds 15 to 20 kt with gusts to 25 kt this morning. Seas 4 to 6 ft, subsiding to 4 to 5 ft this afternoon. Showers likely, mainly this morning.
Tonight..NW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft.
Mon..N winds 15 to 20 kt with gusts to 25 kt, diminishing to 10 to 15 kt in the afternoon. Seas 3 to 4 ft.
Mon night..N winds 10 to 15 kt. Seas 2 to 3 ft.
Tue..N winds 15 to 20 kt with gusts to 30 kt. Seas 3 to 4 ft.
Tue night..N winds 20 kt with gusts to 30 kt. Seas 3 to 4 ft, building to 4 to 5 ft after midnight.
Wed..NE winds 15 to 20 kt. Seas 4 to 5 ft.
Wed night..NE winds 15 to 20 kt. Seas 4 to 5 ft.
Thu..NE winds 15 kt. Seas 3 to 4 ft.
Thu night..E winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers.
AMZ300 312 Am Est Sun Jan 19 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A cold front is expected to move through this morning, followed by high pressure prevailing through the middle of the week. A low pressure system could impact the area this weekend.


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 190922 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 422 AM EST Sun Jan 19 2020

SYNOPSIS. A cold front is expected to move through this morning, followed by high pressure prevailing through the middle of the week. A low pressure system could impact the area this weekend.

NEAR TERM /THROUGH TONIGHT/. Pre-dawn: A cold front was moving toward the area and by dawn, it should extend from east central GA into the SC Midlands. Ahead of the front, rains have been quite patchy and light overnight. Better coverage from bands of rains should be moving into the region in a few hours, along along and just ahead of the front.

Today: Models indicate a period of deeper moisture and upper forcing will sweep through the forecast area after sunrise and into almost midday right along the coast. The cold front will then sweep offshore early this afternoon. Vertical time/height cross sections indicate sharp deep-layered drying in the wake of the cold front. This will result in clearing skies from west to east after midday. The combination of a strong SW low level jet early morning and an increased mixed layer and building momentum transfer this afternoon, will lead to a fairly breezy day at times. This will be especially true along the coastal zones along and north of the Savannah River. Temps a bit on the tricky side given the very warm start to the day and the arrival of the front. Since readings were already in the mid 60s early morning, we show some coastal areas nearing 70 degrees by early afternoon. If rains are more extensive pre-frontal, then this is less likely.

Tonight: Cold air advection pattern in store for the area as surface high pressure builds from the NW. Skies will be mainly clear and a advection freeze is certainly possible to the west of U.S. 17, even down into GA by sunrise Monday morning.

SHORT TERM /MONDAY THROUGH WEDNESDAY/. Monday and Tuesday: Dry and cold high pressure will prevail at the sfc while a broad trough of low pressure expands across the East Conus. The pattern will result in noticeably colder temps by Monday with afternoon highs some 15-20 degrees lower than the previous day. Temps should be even colder on Tuesday as the center of a mid-lvl low rounds the southern base of the trough and shifts across the Southeast while northeast winds prevail within high pressure at the sfc. In general, high temps will range in the mid 40s across Southeast South Carolina and upper 40s across Southeast Georgia Monday afternoon, then struggle to reach the lower 40s across Southeast South Carolina and middle 40s across Southeast Georgia Tuesday afternoon. Overnight periods will be especially chilly as cold air advection peaks and northerly sfc winds persist across the area under clear skies. In general, overnight lows will range in the mid/upper 20s inland to lower 30s at the beaches each night.

Wednesday: A large area of high pressure centered over the Midwest will gradually shift toward the Northeast by mid-week while a mid- lvl low drifts further offshore across the western Atlantic. Sfc winds will respond by becoming slightly more onshore (northeast) while mid-lvl ridging occurs throughout the day. Temps will begin a warming trend, peaking in the lower 50s under mostly sunny skies.

LONG TERM /WEDNESDAY NIGHT THROUGH SATURDAY/. A large area of high pressure will become centered across the Mid- Atlantic states Thursday into Friday while a mid-lvl ridge axis persists along the eastern seaboard. The pattern will favor a warming trend during the second half of the week as sfc winds turn more directly onshore under ridging aloft. In general, high temps should range in the upper 50s to lower 60s Thursday, then middle/upper 60s on Friday. Temps could be limited somewhat to start off the weekend once a coastal trough develops along the southern edge of high pressure, mainly due to clouds and showers drifting onshore, followed by even a greater chance of precip when deeper moisture advects into the region in advance of a low pressure system and associated sfc cold front approaching from the west. Scattered to potentially numerous showers could persist across much of the area Friday night into Saturday before dry high pressure returns post fropa Saturday night and Sunday. Temps will be mild ahead of the front, remaining in the low/mid 50s Friday night, then peaking in the mid/upper 60s Saturday afternoon. Temps should return to near normal on Sunday with highs generally in the upper 50s to around 60 degrees.

AVIATION /08Z SUNDAY THROUGH THURSDAY/. VFR conditions at both terminals much of tonight and Sunday. However, scattered SHRA will move through the area with a cold front late tonight and Sunday morning, and this could result in several hours of MVFR conditions. We'll be close to LLWS through mid morning, but surface winds currently look to be too strong to prevent us from adding to the latest TAF set. Gusty surface winds will then persist behind the cold front through about sunset.

Extended Aviation Outlook: VFR conditions are then expected at both CHS and SAV terminals through the middle of the week.

MARINE. A cold front will move through the waters this afternoon and SW flow will veer W in the wake of the front. The flow will then veer NW and eventually N tonight. A strong SW low level jet was not mixing well over the cool shelf waters this morning with stronger winds over warmer waters from Buoy 41004 south into the offshore GA waters. Winds across the near shore waters will increase tonight as mixing improves with the onset of low level cold air advection. Through mid morning today, we have SCAs out for mainly seas over SC waters. We may also need a SCA again there later tonight as jetting and surging N flow increases. Seas will be chaotic at times with the veering directions through tonight, mainly 3-5 ft close to shore and 5 to 7 ft beyond 20 NM where a SCA will persist.

Monday through Friday: High pressure will build across the waters from the north, favoring elevated winds/seas to start off the week. Small Craft Advisory level conditions will be ongoing across offshore Georgia waters Monday morning, before conditions gradually improve for the remainder of the day. A strong pressure gradient is then expected to develop across the coastal waters heading into Tuesday between high pressure building from the north and low pressure developing offshore. The pattern along with continued cold air advection aloft will likely support Small Craft Advisory conditions across most coastal waters starting Tuesday with peak winds/seas occurring on Wednesday. Gale force conditions are not out of the question for a portion of the coastal waters Wednesday. A Gale Watch/Warning could eventually be needed. In general, north- northeast wind speeds could peak between 25-35 kts Wednesday while seas build to 4-6 ft across nearshore waters and 6-9 ft across offshore waters. Small Craft Advisory level conditions could persist into Thursday, before conditions improve and the flow becomes more onshore as a coastal trough develops along the coast on Friday.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . None. MARINE . Small Craft Advisory until 10 AM EST this morning for AMZ352. Small Craft Advisory until noon EST Monday for AMZ374. Small Craft Advisory until 6 PM EST this evening for AMZ350.

NEAR TERM . SHORT TERM . DPB LONG TERM . DPB AVIATION . DPB MARINE . DPB


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 22 mi47 min 1017.3 hPa
41033 38 mi129 min SW 16 G 21 61°F 59°F1017.9 hPa
ACXS1 - ACE Basin Reserve, SC 40 mi92 min SSW 1.9 64°F 1017 hPa59°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 mi24 minSW 710.00 miOvercast65°F57°F78%1017 hPa
Hunter U. S. Army Airfield, GA19 mi81 minSSW 510.00 miPartly Cloudy64°F56°F77%1016.2 hPa
Hilton Head Island, Hilton Head Airport, SC23 mi42 minSSW 910.00 miOvercast63°F57°F83%1017.3 hPa

Link to 5 minute data for KSAV

Wind History from SAV (wind in knots)
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Last 24hrN6N6NE8NE8NE5E6E5S8S9
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1 day agoNE7NE10NE10NE12
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2 days agoW5W4CalmW9W12W12
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W12NW12NW11N15N8NW5N9N7N7NE8N7N7N4NE4N9N7N8NE9

Tide / Current Tables for Purrysburg Landing, Savannah River, South Carolina
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Purrysburg Landing
Click for Map
Sun -- 12:27 AM EST     -0.09 feet Low Tide
Sun -- 02:29 AM EST     Moonrise
Sun -- 05:28 AM EST     3.05 feet High Tide
Sun -- 07:25 AM EST     Sunrise
Sun -- 01:14 PM EST     0.06 feet Low Tide
Sun -- 01:31 PM EST     Moonset
Sun -- 05:35 PM EST     2.82 feet High Tide
Sun -- 05:45 PM EST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.100.71.72.5332.82.41.91.30.80.30.10.31.12.12.72.82.62.21.71.10.6

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Sun -- 12:38 AM EST     2.13 knots Max Flood
Sun -- 02:28 AM EST     Moonrise
Sun -- 04:30 AM EST     -0.00 knots Slack
Sun -- 07:23 AM EST     Sunrise
Sun -- 08:06 AM EST     -2.19 knots Max Ebb
Sun -- 10:44 AM EST     0.00 knots Slack
Sun -- 01:13 PM EST     1.77 knots Max Flood
Sun -- 01:30 PM EST     Moonset
Sun -- 04:42 PM EST     -0.00 knots Slack
Sun -- 05:44 PM EST     Sunset
Sun -- 08:12 PM EST     -1.85 knots Max Ebb
Sun -- 10:48 PM EST     0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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22.11.91.40.6-0.6-1.4-1.9-2.2-1.9-10.31.31.81.71.30.7-0.3-1.2-1.7-1.8-1.7-10.3

Weather Map
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wmap_A
GEOS 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 (6,6,7,8)
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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 numerous 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.