Wednesday, January22, 2020
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Marine Weather and Tides
Isle of Hope, GA

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 7:21AMSunset 5:49PM Wednesday January 22, 2020 5:22 PM EST (22:22 UTC) Moonrise 5:34AMMoonset 3:52PM Illumination 5% Phase: Waning Crescent; Moon at 27 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- 316 Pm Est Wed Jan 22 2020
.small craft advisory in effect through Thursday evening...
Tonight..NE winds 20 to 25 kt with gusts to 30 kt early, decreasing to 15 to 20 kt with gusts to 25 kt. Seas 5 to 7 ft, subsiding to 4 to 6 ft after midnight.
Thu..NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft. A slight chance of showers in the afternoon.
Thu night..E winds 10 to 15 kt. Seas 4 to 6 ft, subsiding to 4 to 5 ft after midnight. A chance of showers.
Fri..S winds 10 kt. Seas 4 to 5 ft. Showers likely. A slight chance of tstms in the afternoon.
Fri night..SW winds 10 to 15 kt, becoming W after midnight. Seas 4 to 5 ft, subsiding to 3 to 4 ft after midnight. A chance of showers with a slight chance of tstms in the evening.
Sat..W winds 10 to 15 kt. Seas 3 to 4 ft.
Sat night..NW winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft after midnight.
Sun..NW winds 10 kt. Seas 2 to 3 ft.
Sun night..NW winds 5 to 10 kt. Seas 2 ft. A slight chance of showers.
Mon..NW winds 5 to 10 kt. Seas 2 ft.
Mon night..NW winds 5 to 10 kt. Seas 1 foot. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 316 Pm Est Wed Jan 22 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure to the north will weaken in advance of a storm system that will impact the region Thursday night into Friday night. High pressure will then return and generally persist with dry weather into the middle of next week.


7 Day Forecast for Marine Location Near Isle of Hope, GA
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location: 31.98, -81.05     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 222039 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 339 PM EST Wed Jan 22 2020

SYNOPSIS. High pressure to the north will weaken in advance of a storm system that will impact the region Thursday night into Friday night. High pressure will then return and generally persist with dry weather into the middle of next week.

NEAR TERM /UNTIL 6 AM THURSDAY MORNING/. High pressure centered to our north will remain the primary feature tonight, although a weak coastal trough/front will take shape late. Aloft, a mid level ridge axis will slide overhead and eventually off the coast by daybreak. Model soundings show some increase in moisture in the lower levels, but this should amount to no more than an increase in cloud cover. Low temperatures will be a bit more seasonable tonight, ranging from the low 30s inland to upper 30s/around 40 at the coast.

SHORT TERM /6 AM THURSDAY MORNING THROUGH SATURDAY/. High confidence Thursday and Saturday with moderate confidence Thursday night through Friday night. Chilly high pressure to the north will break down Thursday as a coastal trough develops near the FL/GA coasts. Clouds will be on the increase and we can't rule out a few showers near the coast as low-level moisture/lift increase. The trough should sharpen up Thursday night near the GA/SC coasts before pushing north and west through the forecast area Friday as a warm front. This will lead to increasing shower coverage as deeper moisture and upper forcing also increase. There could even be a few thunderstorms as low/mid-level instability increases, especially Friday afternoon/evening, although likely not sufficiently to cause any severe storms. However, deep layer shear is strong and supportive of organized convection so can't completely rule out a severe storm with damaging winds or even a tornado. Otherwise, rain chances will end from southwest to northeast Friday night as a cold front moves through leading to cooler and drier conditions on Saturday. Temperatures will be near to below normal Thursday, then likely get above normal Friday before returning back closer to normal Saturday.

LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/. Dry sfc high pressure will spread across the Southeast United States late weekend along the southern edge of a large mid-lvl trough of low pressure extending across much of the Midwest to Northeast states. The pattern will support slightly cooler conditions across the area late weekend into early next week as northeast winds prevail within high pressure that becomes centered across the Mid- Atlantic states. However, winds should turn more onshore Wednesday as the high shifts offshore in advance of a low pressure system approaching the East Conus during the middle of next week. Onshore winds in combination with a fairly large ridge of high pressure building aloft should support a warming trend midweek.

In general, high temps should range in the upper 50s/lower 60s Saturday through Monday, then warm into the middle/upper 60s by Wednesday. Overnight lows should dip into the middle/upper 30s inland to lower 40s near the coast Saturday night through Monday night, then remain in the upper 40s/lower 50s by Wednesday night.

AVIATION /20Z WEDNESDAY THROUGH MONDAY/. Mainly VFR through 18z Thursday. There is a chance MVFR ceilings could move into the terminals around/after daybreak, as noted by model guidance and soundings. Opted to keep VFR for now, but have introduced a few/sct MVFR layer.

Extended Aviation Outlook: Moderate confidence in mostly VFR conditions through Thursday, although can't rule out MVFR ceilings as low-level moisture/lift increase over the area as a trough develops just southeast of the area. Expect a better chance of greater restrictions from low clouds/fog/showers Thursday night into Friday night as a warm front and then cold front affect the area. High confidence in VFR conditions returning Friday night or Saturday morning and continuing through early next week, although there is a very low risk of minor restrictions Monday due to a passing upper level disturbance.

MARINE. Tonight: Winds and seas will continue to slowly subside tonight, however conditions will still be supportive of Small Craft Advisories for all zones with the exception of the Charleston Harbor. The ongoing Gale Warning for the outer Georgia waters will be able to transition to a Small Craft Advisory this evening.

Thursday through Monday: Moderate confidence through the period. High pressure to the north and low pressure offshore will give way to a coastal trough/warm front Thursday night and Friday and then a cold front Friday night. Small Craft Advisories will remain in effect into Thursday night within 20 nm, possibly returning later in the week, but likely continue through Saturday night beyond 20 nm for lingering 6 foot seas. No significant concerns Sunday and Monday with a weak pressure gradient expected.

TIDES/COASTAL FLOODING. Strong high pressure to the north and low pressure offshore will maintain elevated north/northeast winds into Thursday which could lead to tide levels slightly above Coastal Flood Advisory thresholds near Charleston during the morning high tide.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . None. MARINE . Small Craft Advisory until 11 PM EST Thursday for AMZ350-352- 354. Gale Warning until 7 PM EST this evening for AMZ374.

NEAR TERM . ETM SHORT TERM . RJB LONG TERM . AVIATION . ETM/RJB MARINE . ETM/RJB TIDES/COASTAL FLOODING .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 9 mi52 min 50°F 53°F1024.4 hPa
41033 40 mi74 min E 14 G 21 50°F 54°F1024.6 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 41 mi32 min NNE 23 G 27 51°F 58°F8 ft1022.4 hPa (+0.7)45°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hunter U. S. Army Airfield, GA6 mi86 minNNE 510.00 miFair55°F31°F40%1022.7 hPa
Savannah-Hilton Head International Airport, GA14 mi29 minNNE 810.00 miMostly Cloudy56°F33°F42%1024.3 hPa

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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Last 24hrN5N7N5N5N8N7N7N5N6N6N4N10
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1 day agoN9N7N6NE6NE5NE6N3N3N4N6N6N6N8N7N8N11
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2 days agoW10NW14W9W10NW11NW12NW9NW8NW11NW11NW8N7N10
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Tide / Current Tables for Isle of Hope, Skidaway River, Georgia
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Isle of Hope
Click for Map
Wed -- 12:14 AM EST     -0.49 feet Low Tide
Wed -- 05:34 AM EST     Moonrise
Wed -- 06:59 AM EST     8.28 feet High Tide
Wed -- 07:23 AM EST     Sunrise
Wed -- 01:02 PM EST     -0.24 feet Low Tide
Wed -- 03:52 PM EST     Moonset
Wed -- 05:48 PM EST     Sunset
Wed -- 07:08 PM EST     7.12 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.5-0.212.94.96.77.98.37.86.54.62.40.5-0.20.31.63.55.36.67.16.85.63.91.9

Tide / Current Tables for Savannah River Entrance, Georgia Current (2) (expired 1999-12-31)
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Savannah River Entrance
Click for Map
Wed -- 01:15 AM EST     0.00 knots Slack
Wed -- 03:45 AM EST     1.63 knots Max Flood
Wed -- 05:33 AM EST     Moonrise
Wed -- 07:10 AM EST     -0.00 knots Slack
Wed -- 07:22 AM EST     Sunrise
Wed -- 10:34 AM EST     -2.66 knots Max Ebb
Wed -- 02:09 PM EST     0.00 knots Slack
Wed -- 03:51 PM EST     Moonset
Wed -- 04:19 PM EST     1.16 knots Max Flood
Wed -- 05:47 PM EST     Sunset
Wed -- 07:26 PM EST     -0.00 knots Slack
Wed -- 10:48 PM EST     -2.39 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.4-0.30.81.51.61.40.90.2-0.9-1.9-2.6-2.6-2.1-1.3-0.20.71.11.10.80.3-0.5-1.5-2.2-2.4

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (17,4,5,8)
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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.