Thursday, November21, 2019 L-36.com


Marine Weather and Tides
Tybee Island, GA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:56AMSunset 5:22PM Thursday November 21, 2019 4:28 PM EST (21:28 UTC) Moonrise 1:19AMMoonset 2:26PM Illumination 28% 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- 321 Pm Est Thu Nov 21 2019
Tonight..E winds 5 kt this evening, becoming sw. Seas 2 ft.
Fri..SW winds 5 to 10 kt. Seas 2 ft.
Fri night..SW winds 5 to 10 kt. Seas 2 ft.
Sat..SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts to 20 kt in the afternoon. Seas 2 to 3 ft.
Sat night..SW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 3 to 4 ft, building to 4 to 5 ft after midnight. A chance of showers.
Sun..W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 3 to 4 ft, subsiding to 2 to 3 ft in the afternoon.
Sun night..NW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 ft.
Mon..W winds 5 kt. Seas 2 ft.
Mon night..W winds 5 kt. Seas 1 foot.
Tue..E winds 5 kt. Seas 2 ft.
Tue night..S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers.
AMZ300 321 Pm Est Thu Nov 21 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail across the southeast u.s. Through Friday. A cold front will move through the area Saturday night, followed by high pressure for the first half of next week.


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


Area Discussion for - Charleston, SC
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FXUS62 KCHS 212049 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 349 PM EST Thu Nov 21 2019

SYNOPSIS. High pressure will prevail across the Southeast U.S. through Friday. A cold front will move through the area Saturday night, followed by high pressure for the first half of next week.

NEAR TERM /UNTIL 6 AM FRIDAY MORNING/. Quiet and dry conditions expected tonight as surface high pressure remains the dominant feature. Aloft, mid level ridging will flatten a bit as weak shortwave energy traverses overhead. Main impact will be some high clouds passing through at times. Otherwise, temperatures will be more mild tonight, closer to mid/late November normals. Lows will range from low 40s inland to around 50 at the coast. A few of the hi-res models hint at some fog developing in the southern areas near the Altamaha, but with higher condensation pressure deficits and temperatures not expected to exceed crossover temperatures, have opted to keep mention of fog out of the forecast.

SHORT TERM /6 AM FRIDAY MORNING THROUGH SUNDAY/. Friday: Aloft, mainly zonal flow will persist between a flattened ridge of high pressure to the south and a trough of low pressure developing over the Central United States. At the sfc, high pressure centered across the area will gradually shift offshore during the day, allowing a warm southwesterly sfc wind to develop across the region during the afternoon. Warm air advection will likely offset increasing cloud cover throughout the day, favoring high temps to peak in the lower 70s during the afternoon. Overnight lows will also be noticeably warmer than the previous night, ranging in the low/mid 50s away from the coast.

Saturday: A mid/upper lvl trough of low pressure will dig across the Central United States, helping develop a sfc low pressure system across the South Central United States that tracks east/northeast toward the area during evening/overnight hours. Strong warm air advection ahead of the system will lead to the warmest temps over the weekend with highs peaking in the mid to potentially upper 70s (warmest across Southeast Georgia). Deep moisture will arrive late (PWATs approaching 1.5 inches), likely along/near a southward extending cold front that shifts across the area overnight. The setup should favor a few to scattered showers initially spreading west to east across inland areas within a few hours of sunset, but the bulk of precip activity will likely come during overnight hours when forcing associated with the front and mid/lvl shortwave peak across the area. At this time, instability appears to be too low for thunderstorms given the arrival of strongest forcing overnight. Temps should start off mild during the night, but will then quickly cool off into the upper 40s/lower 50s late behind the front.

Sunday: The area will remain along the southern periphery of a trough of low pressure aloft while sfc high pressure spreads across the region behind a departing cold front. The setup will lead to a dry weather day with light westerly winds in place, but cooler temps despite a full day of sun. In general, highs should range in the low/mid 60s.

LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/. Models are in great agreement showing high pressure across the region Sunday night into Monday night. Expect dry conditions with temperatures within a few degrees of season values during this time period. Tuesday and Wednesday the 00Z models differ on the creation, evolution, and path of a storm system starting over the central U.S. Until they come into better agreement, we went with a blended forecast.

AVIATION /21Z THURSDAY THROUGH TUESDAY/. VFR is expected to prevail through 18z Friday. Models hint at some light fog close to daybreak near KSAV, however low confidence in this occurring so have kept VFR in the TAF.

Extended Aviation Outlook: VFR conditions are expected at both CHS and SAV terminals through Friday. Flight restrictions are possible at both CHS and SAV terminals Saturday evening/night due to showers along/near a passing cold front. VFR conditions should then return Sunday and prevail through Tuesday.

MARINE. Tonight: A weak pressure pattern will be in place as the center of surface high pressure lingers nearby. Winds will gradually veer from the east/northeast to the south/southwest by daybreak. Speeds will be less than 10 knots on average and seas 2 to 3 feet.

Friday through Tuesday: High pressure will prevail across the coastal waters through Friday, favoring winds/seas that remain below Small Craft Advisory levels. Winds/seas should then increase/build Saturday ahead of a cold front expected to push across coastal waters Saturday night. Small Craft Advisories will likely be needed for most coastal waters Saturday night into early Sunday as cold air advection helps produce gusty winds upwards to 25-30 kts and seas as high as 4-6 ft. Greatest winds and seas are expected across northern South Carolina waters off the Charleston County coast and across offshore Georgia waters. The cold front will push well offshore beyond coastal waters by late morning Sunday with high pressure building across the region in its wake. As a result, the pressure gradient will be on a weakening trend and winds/seas will likely decrease, ending all Small Craft Advisories by Sunday afternoon. High pressure will then become centered over the region early next week, favoring tranquil marine conditions through Tuesday.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . None. MARINE . None.

NEAR TERM . ETM SHORT TERM . DPB LONG TERM . MS AVIATION . DPB/ETM MARINE . DPB/ETM


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 3 mi64 min E 6 G 7 59°F 58°F1024.3 hPa
41033 29 mi80 min E 7.8 G 9.7 58°F 60°F1024.7 hPa
ACXS1 - ACE Basin Reserve, SC 42 mi103 min S 1 62°F 1024 hPa42°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 44 mi38 min NE 9.7 G 12 62°F 66°F3 ft1023.1 hPa (-0.9)55°F
SAXG1 - Sapelo Island Reserve, GA 48 mi88 min ENE 6 65°F 1024 hPa (-1.0)50°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 mi38 minE 310.00 miFair61°F41°F48%1024.4 hPa
Hunter U. S. Army Airfield, GA16 mi32 minN 010.00 miFair66°F42°F42%1023 hPa
Savannah-Hilton Head International Airport, GA20 mi35 minE 410.00 miPartly Cloudy67°F41°F39%1023.5 hPa

Link to 5 minute data for KHXD

Wind History from HXD (wind in knots)
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Last 24hrN3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN6N6N6N6NE5NE5E6SE4E5E3
1 day agoW5CalmCalmSW4SW4SW4SW5SW3SW4SW5SW5SW44SW5SW4SW4N10
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2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm3W3SW5SW5SW5SW5NW5W4W11W11
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Tide / Current Tables for Tybee Light, Savannah River, Georgia
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Tybee Light
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Thu -- 01:18 AM EST     Moonrise
Thu -- 02:38 AM EST     7.02 feet High Tide
Thu -- 06:57 AM EST     Sunrise
Thu -- 08:59 AM EST     0.52 feet Low Tide
Thu -- 02:25 PM EST     Moonset
Thu -- 02:58 PM EST     7.55 feet High Tide
Thu -- 05:20 PM EST     Sunset
Thu -- 09:30 PM EST     0.23 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.666.976.35.23.72.210.512.44.25.97.17.67.15.94.42.81.30.40.41.3

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Thu -- 12:30 AM EST     1.82 knots Max Flood
Thu -- 01:18 AM EST     Moonrise
Thu -- 04:16 AM EST     -0.00 knots Slack
Thu -- 06:57 AM EST     Sunrise
Thu -- 07:43 AM EST     -1.90 knots Max Ebb
Thu -- 10:22 AM EST     0.00 knots Slack
Thu -- 01:00 PM EST     2.02 knots Max Flood
Thu -- 02:25 PM EST     Moonset
Thu -- 04:37 PM EST     -0.00 knots Slack
Thu -- 05:20 PM EST     Sunset
Thu -- 07:59 PM EST     -1.97 knots Max Ebb
Thu -- 10:47 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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1.81.81.51.10.3-0.8-1.5-1.8-1.9-1.5-0.50.81.721.81.40.7-0.4-1.4-1.9-2-1.8-10.3

Weather Map
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wmap_A
GEOS 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 (16,3,4,5)
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Ground Weather Radar Station Charleston, SC
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