Monday, December9, 2019
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Marine Weather and Tides
Wilmington Island, GA

Version 3.4
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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 7:11AMSunset 5:21PM Monday December 9, 2019 6:04 PM EST (23:04 UTC) Moonrise 3:48PMMoonset 4:31AM Illumination 96% Phase: Waxing Gibbous; Moon at 13 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- 311 Pm Est Mon Dec 9 2019
Tonight..SW winds 10 to 15 kt. Seas 3 to 4 ft. Patchy fog after midnight.
Tue..S winds 5 to 10 kt. Seas 3 to 4 ft. Patchy dense fog.
Tue night..SW winds 5 to 10 kt. Seas 3 ft. Areas of dense fog. A chance of showers after midnight.
Wed..NW winds 5 to 10 kt, becoming N 15 to 20 kt with gusts to 25 kt in the afternoon. Seas 3 to 4 ft. Areas of fog in the morning. A chance of showers.
Wed night..NE winds 20 to 25 kt with gusts to 35 kt. Seas 4 to 6 ft, building to 6 to 8 ft after midnight. A chance of showers.
Thu..NE winds 25 to 30 kt. Seas 7 to 9 ft. A chance of showers.
Thu night..NE winds 25 to 30 kt, diminishing to 20 to 25 kt after midnight. Seas 7 to 9 ft, subsiding to 6 to 8 ft after midnight. A chance of showers in the evening, then showers likely after midnight.
Fri..NE winds 15 to 20 kt. Seas 4 to 6 ft. Showers likely.
Fri night..SE winds 10 kt. Seas 3 to 4 ft. Showers likely.
Sat..SW winds 10 kt. Seas 3 to 4 ft. A chance of showers.
Sat night..W winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers.
AMZ300 311 Pm Est Mon Dec 9 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Ahead of approaching cold front, unseasonably warm conditions will prevail through Tuesday. The cold front will push through the area Tuesday night into early Wednesday, then strong high pressure will build over the area Wednesday through Thursday. Low pressure will then produce wet conditions late week into this weekend, followed by high pressure late weekend into early next week.


7 Day Forecast for Marine Location Near Wilmington Island, GA
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Area Discussion for - Charleston, SC
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FXUS62 KCHS 092105 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 405 PM EST Mon Dec 9 2019

SYNOPSIS. Ahead of approaching cold front, unseasonably warm conditions will prevail through Tuesday. The cold front will push through the area Tuesday night into early Wednesday, then strong high pressure will build over the area Wednesday through Thursday. Low pressure will then produce wet conditions late week into this weekend, followed by high pressure late weekend into early next week.

NEAR TERM /UNTIL 6 AM TUESDAY MORNING/. Tonight: Deep layered southwest flow will prevail with a clear area of NVA passing through aloft. Any notable moisture is confined to the low levels and there is virtually no forcing for ascent in the warm sector out ahead of a cold front that will start to approach the region from the west late tonight. As such, a dry forecast remains in place. The primary forecast challenge revolves around fog and/or stratus development. We will be in a warm and moist low level air mass, though conditions aren't ideal for fog development with a decent amount of low level flow. Most model solutions do show some signs of stratus build-down processes leading to fog. We would also see fog develop upstream and advect in through the night. Confidence in fog coverage isn't particularly high but whatever fog does develop has a strong chance to be dense. We are in a decent set up for sea fog development over the coastal waters, as long as winds don't strengthen too much. The fog forecast follows generally SREF probabilities favoring much of southeast Georgia as well as the coastal corridor for inland expansion of sea fog. Kept the coverage patchy, but did include dense wording. However, fog chances will be considerably lower if winds are stronger than anticipated. Expect a mild night with lows only falling to around 60 in most areas.

SHORT TERM /6 AM TUESDAY MORNING THROUGH THURSDAY/. Tuesday: Away from the immediate coast/ahead of an approaching cold front, record/near-record warmth featuring high temperatures in the upper 70s/lower 80s will prevail. On the immediate coast, expect the marine influence to produce much cooler temperatures, and seas fog will either hug the coastline or will lurk not far offshore. This regime will persist Tuesday night, while the chance for showers will ramp up as the cold front near the region. Overall, per latest guidance the band of deep moisture along/behind the surface front appears to be thinning with time, so overnight PoPs are capped at 40-50 percent.

Wednesday, the cold front will push offshore early, and high pressure will push much cooler air into the region. High temperatures in the upper 50s to middle 60s should occur by around midday then should generally level off or even fall a couple of degrees through mid-afternoon. Meanwhile, scattered showers could persist during the morning, then somewhat drier air should spread into the region during the afternoon/at night. While showers could end, guidance depicts sufficient residual moisture to justify low PoPs through Wednesday night. Wednesday night lows will be more typical of mid-December, ranging from the upper 30s/lower 40s inland to 45-50F due to elevated northeast winds on the immediate coast.

Thursday, strong high pressure centered north/northeast of the region will anchor a cool wedge regime with high temperatures only in the lower to middle 50s most locations, and elevated northeast winds will create apparent temperatures as low as the 40s inland. The prospects for measurable precipitation remain uncertain, as the high could be sufficiently strong to hold deep moisture well south of the region through the day, but per uncertainty and area consensus, maintained ongoing slight chance/chance PoPs. More likely, deeper moisture and an associated potential for widespread rainfall could commence Thursday night or Friday.

LONG TERM /THURSDAY NIGHT THROUGH MONDAY/. Models have started to come into better agreement for the late week period. The pattern continues to favor cooler and unsettled conditions. A wedge of high pressure will linger inland Thursday night into Friday, while a coastal trough/warm front develops offshore. Meanwhile, low pressure will organize over the Gulf of Mexico. The low is expected to lift northeast over or near the area sometime late week. While there are still some timing issues, plenty of moisture and forcing will support higher than normal rain chances, with the potential for periods of moderate to heavy rainfall. Late weekend once the low passes through, drier conditions and temperatures closer to normal are expected.

AVIATION /20Z MONDAY THROUGH SATURDAY/. VFR conditions have returned at both KCHS and KSAV and should prevail through the evening. Overnight, the forecast challenge once again revolves around fog and/or stratus development. Model guidance is once again advertising IFR and even LIFR conditions which makes sense given the atmosphere and generally light winds in place. The forecast features MVFR fog and stratus starting around 07z, then lowering to IFR around 09-10z. There is certainly a chance for IFR to occur sooner, but overall confidence in timing isn't high. Similar to this morning, whatever conditions develop overnight will likely linger into the middle of Tuesday morning. It looks like any rainfall with the approaching cold front will be after the 18z Tuesday.

Extended Aviation Outlook: Periods of flight restrictions are expected, especially in fog/stratus Tuesday night into Wednesday and in showers late week into this weekend.

MARINE. Tonight: Southerly flow will prevail with wind speeds as high as 10-15 knots. Seas should stay in the 3-5 ft range through the night. The main forecast challenge will be the potential for sea fog development. The southerly flow will bring a warm moist air mass across the relatively cooler shelf waters. Model guidance favors sea fog development, though there is some concern that low level winds could prevent it if speeds become too high. The forecast features sea fog across the nearshore waters and the Charleston Harbor starting after midnight and continuing through sunrise. Kept the coverage patchy, but whatever does develop could be locally dense.

Tuesday and Tuesday night, the primary concern will focus on the potential for significant sea fog. Otherwise, pre-cold front S/SW winds less than 20 knots will be accompanied by seas 3-5 feet before a cold front crosses the waters Wednesday morning.

Wednesday through Friday: After cold fropa and an initial wind shift to the northwest Wednesday morning, strong high pressure will expand over the region and will shift to a position north/northeast of the waters through the latter half of the week. As a result, winds will turn to the northeast and strengthen, and seas will build to hazardous levels. Then, low pressure will track north/northeast from the Gulf of Mexico late this week into this weekend, and this should maintain elevated winds/seas. While Small Craft Advisory conditions are a virtual certainty during this period, a period of gales could develop Wednesday night through Thursday. We will continue to highlight this threat within the Hazardous Weather Outlook, and Gale Watches/Warnings could eventually be required.

Sea Fog: Unseasonably warm/humid air flowing over cool Atlantic shelf waters will likely produce sea fog until a cold front pushes through the region early Wednesday. The scenario appears very favorable for significant marine fog, although details including coverage/persistence of dense fog remain uncertain. However, it's likely that Dense Fog Advisories will be required.

TIDES/COASTAL FLOODING. Elevated tide cycles are expected late week due to increasing astronomical influences with the full moon on Thursday and strong northeasterly winds. Minor to moderate coastal flooding will be possible with the morning high tides Thursday through Saturday. Coastal Flood Advisories could be required. Also of note, if significant rainfall occurs around the morning high tides Friday and Saturday, the potential for flooding of poor drainage areas could increase along the coast.

CLIMATE. Record Max Temps December 10th . KCHS . 82F set in 1972. KCXM . 79F set in 1943. KSAV . 82F set in 1972.

EQUIPMENT. KCLX will remain down until further notice.

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



NEAR TERM . BSH SHORT TERM . SPR LONG TERM . ETM AVIATION . BSH/SPR MARINE . BSH/SPR TIDES/COASTAL FLOODING . CLIMATE . EQUIPMENT .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 6 mi83 min SSW 6 G 8.9 65°F 58°F1017.1 hPa
41033 37 mi57 min SSW 7.8 G 12 61°F 59°F1017.7 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 42 mi75 min S 16 G 18 66°F 63°F4 ft1016.1 hPa (-1.6)64°F
ACXS1 - ACE Basin Reserve, SC 48 mi80 min S 1 63°F 1017 hPa60°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, GA8 mi69 minSSE 610.00 miFair68°F60°F78%1016.2 hPa
Savannah-Hilton Head International Airport, GA14 mi72 minS 910.00 miOvercast67°F63°F87%1016.7 hPa
Hilton Head Island, Hilton Head Airport, SC22 mi75 minS 710.00 miPartly Cloudy64°F60°F88%1017.3 hPa

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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Last 24hrE6E4E5NE4NE4E6E4E5E9E7E5E5CalmCalm--SE4S9----S6SE7S8S6S5
1 day agoE5E6NE4NE5NE4NE3NE5NE7NE7NE7NE5NE7NE6N7N6NE10N8NE9NE6N6E4E5E5E3
2 days agoN7NW5NE5NW4CalmCalmW4NW4CalmCalmN3N6N4CalmNE5NE7E9NE11NE6--NE7NE5E6E4

Tide / Current Tables for Savannah Sheraton Resort Hotel, Wilmington River, Georgia
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Savannah Sheraton Resort Hotel
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Mon -- 04:31 AM EST     Moonset
Mon -- 05:52 AM EST     8.17 feet High Tide
Mon -- 07:12 AM EST     Sunrise
Mon -- 12:10 PM EST     0.85 feet Low Tide
Mon -- 03:48 PM EST     Moonrise
Mon -- 05:19 PM EST     Sunset
Mon -- 06:17 PM EST     7.41 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.51.43.156.77.88.27.66.34.731.60.91.22.33.95.56.77.47.26.24.62.81.2

Tide / Current Tables for Savannah River Entrance, Georgia Current (2) (expired 1999-12-31)
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Savannah River Entrance
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Mon -- 01:08 AM EST     0.00 knots Slack
Mon -- 03:28 AM EST     1.47 knots Max Flood
Mon -- 04:30 AM EST     Moonset
Mon -- 06:43 AM EST     -0.00 knots Slack
Mon -- 07:12 AM EST     Sunrise
Mon -- 10:19 AM EST     -2.38 knots Max Ebb
Mon -- 01:49 PM EST     0.00 knots Slack
Mon -- 03:47 PM EST     Moonrise
Mon -- 03:53 PM EST     1.19 knots Max Flood
Mon -- 05:19 PM EST     Sunset
Mon -- 06:45 PM EST     -0.00 knots Slack
Mon -- 10:31 PM EST     -2.30 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.1-0.10.81.41.410.5-0.2-1-1.9-2.4-2.3-1.7-0.80.20.91.20.90.4-0.1-0.9-1.7-2.2-2.2

Weather Map
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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 (18,4,5,8)
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Ground Weather Radar Station Charleston, SC
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