Monday, December16, 2019
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Marine Weather and Tides
Talahi 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 7:16AMSunset 5:23PM Monday December 16, 2019 4:01 AM EST (09:01 UTC) Moonrise 10:06PMMoonset 11:09AM Illumination 79% Phase: Waning Gibbous; Moon at 19 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- 346 Am Est Mon Dec 16 2019
Today..S winds less than 10 kt. Seas 2 to 3 ft.
Tonight..S winds 5 to 10 kt, becoming sw 10 to 15 kt after midnight. Seas 2 to 3 ft, building to 3 to 4 ft after midnight. Patchy fog after midnight.
Tue..SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Patchy fog in the morning. A chance of showers in the afternoon.
Tue night..W winds 10 to 15 kt, becoming nw 15 to 20 kt with gusts to 25 kt after midnight. Seas 3 to 4 ft. Showers likely with a slight chance of tstms in the evening, then showers likely after midnight.
Wed..N winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft.
Wed night..N winds 10 to 15 kt. Seas 2 to 3 ft.
Thu..NE winds 10 to 15 kt. Seas 3 to 4 ft.
Thu night..NE winds 10 to 15 kt. Seas 3 to 4 ft.
Fri..NE winds 15 kt. Seas 3 to 4 ft.
Fri night..E winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 346 Am Est Mon Dec 16 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will slide offshore through tonight. A cold front will then cross the area late Tuesday, followed by high pressure prevailing into late week. Low pressure should develop near the coast this weekend, before high pressure returns early next week.


7 Day Forecast for Marine Location Near Talahi Island, GA
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location: 32.12, -80.99     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 160553 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 1253 AM EST Mon Dec 16 2019

SYNOPSIS. High pressure across the region today will slide offshore through Monday. A cold front will then cross the area late Tuesday, followed by high pressure into late next week. Low pressure should develop near the coast next weekend.

NEAR TERM /THROUGH TODAY/. Confidence continued to increase regarding the fog potential, especially since there are already signs of it developing, plus the low level winds are now forecast to be a little less than we early thought. We have patchy fog early tonight, with coverage increasing to areas of fog near and west of I-95 after 3 am. Condensation pressure deficits are near zero across many areas, which could result in patches of dense fog as we get closer to daybreak.

Otherwise, clear skies overnight will give way to an increase in stratus that occurs with the fog late and toward daybreak. Winds will be light southerly or calm, but with warm advection above the strong surface inversion, temps won't be as cold as last night. We're carrying 40-45F far inland, 46-50F closer to the coast, and a few pockets of upper 30s in the Francis Marion Nat'l Forest.

SHORT TERM /TONIGHT THROUGH THURSDAY/. Monday: The forecast area will remain between high pressure centered over the western Atlantic and organizing low pressure over the lower Mississippi River Valley. The sfc pattern will support steady south winds by Monday afternoon, resulting in rising llvl thicknesses through the day. The combination of partly sunny conditions and mild low level thermal profiles should yield well above normal high temperatures. I will forecast low to mid 70s across the Charleston Tri-County to the upper 70s across SE GA. Monday night, the center of the low is forecast to track rapidly to the NE, reaching the mid-Appalachians by dawn Tuesday. The associated cold front will cross the lower Appalachians late Monday night, passing over the east facing slopes by sunrise Tuesday. SPC HREF indicates that a patch of pre-frontal showers will pass over the forecast area after midnight, resulting in 0.15 of an inch or less. The arrival of thick of mid and high clouds and steady south winds should limit cooling to the upper 50s.

Tuesday: Short term guidance indicates good agreement with the late afternoon to early evening passage of a band of convection. GFS and NAM forecast a wide field of SBCAPE between 500-1000 J/kg along and ahead of the cold front. Given the instability, I will maintain a mention of SCHC thunderstorms. SPC Convective Outlook discusses the potential for one or two strong storms, but confidence is too low to highlight with a Marginal risk at this time. Using a blend of guidance, QPF on Tuesday is expected to range from near a half inch inland to .3 of an inch along the coast. Given the late day arrival of the showers/thunderstorms and CAA, high temperatures should range within a degree or two from values reached on Monday.

Wednesday: High pressure will increase across the forecast area in the wake of the cold front. CAA is forecast to end during the early daylight hours, with H85 temps remaining between 1-4C through the rest of the day. The day should begin with temperatures in the lower 40s across the forecast area. Given mostly sunny conditions through the day, high temps should peak in the low to mid 50s.

LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/. Dry and cool high pressure will persist across the Southeast United States through late week. Light north/northeast winds will keep high temps in the mid 50s Thursday while overnight lows dip into the low/mid 30s away from the coast Wednesday night and Thursday night. Temps will slowly warm into the upper 50s/lower 60s Friday as low pressure develops off the Southeast Coast. Guidance suggests the potential for precip to return across the area during the weekend, mainly as the low deepens and tracks north/northeast offshore Saturday into Sunday. Precip chances should be highest near the land/sea interface Saturday. Temps should also peak in the upper 50s/lower 60s each day. Overnight lows should range in the mid/upper 30s inland to low/mid 40s near the coast.

AVIATION /06Z MONDAY THROUGH FRIDAY/. VFR the first part of tonight and during the late morning and afternoon Monday. However, from about 08-14Z conditions are favorable for the development of fog and stratus. The model consensus and climatology supports a better potential of KSAV than at KCHS. On the 06Z TAFs, we introduced IFR vsbys at KSAV but did not opt for any low cigs at this time. We maintained MVFR vsby at KCHS around daybreak.

Extended Aviation Outlook: Flight restrictions are possible at both terminals late Tuesday with the passage of a pre-frontal line showers and thunderstorms. VFR conditions are expected across the region Wednesday and Thursday.

MARINE. We'll need to carefully watch for fog developing in Charleston Harbors late tonight into Monday morning. However, with an onshore flow it looks like it should stay inland from the AMZ330 marine zone, mainly north of the Don Holt Bridge.

High pressure will remain across the near shore waters through Monday. Winds during this time are forecast to continue from the south between 5-10 knots with seas between 2-4 ft.

Late Monday night, sfc dewpoints and temperatures in the low 60s, nearly parallel near shore winds, sea sfc temps in the upper 50s to low 60s, will favor the formation of sea fog during the pre- dawn hours. I will add a mention of patchy fog to the forecast. Southwest winds are expected to gradually strengthen ahead of a cold front Tuesday. Small Craft Advisory criteria wind gusts and seas will be possible over portions of AMZ350 and 374. A band of showers and thunderstorms will pass across the waters late Tuesday into Tuesday night. In the wake of the cold front, NW winds will increase with gusts to 25 kts across the near shore waters Tuesday night into Wednesday morning. Small Craft Advisory conditions may linger across the outer GA waters through Wednesday. High pressure will increase over the waters Thursday and Friday, supporting NE winds between 10-15 kts and seas between 2-5 ft.

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

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 7 mi55 min Calm G 0 54°F 56°F1022.7 hPa
41033 33 mi53 min WNW 1.9 G 3.9 56°F 55°F1023.3 hPa
ACXS1 - ACE Basin Reserve, SC 42 mi76 min Calm 45°F 1023 hPa45°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 50 mi71 min SSE 3.9 G 3.9 62°F 61°F2 ft1022 hPa (-0.4)59°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, GA11 mi65 minN 02.00 miFog/Mist45°F42°F91%1021.6 hPa
Savannah-Hilton Head International Airport, GA11 mi68 minN 010.00 miFair45°F43°F93%1022.3 hPa
Hilton Head Island, Hilton Head Airport, SC17 mi66 minN 010.00 miFair46°F44°F93%1022.7 hPa

Link to 5 minute data for KSAV

Wind History from SAV (wind in knots)
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Last 24hrCalmCalmCalmCalmW3W5W6W5NW53W4CalmS3S5S7S4S6S5S4S3CalmN3CalmCalm
1 day agoNW4CalmW12W10W11W16W13W13W13W12
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2 days agoN6N7N10N8N7N6N7NE6N3N6N6N4NW4NW5NW5NW4NW5CalmCalmCalmS53W43

Tide / Current Tables for Turnbridge Landing, Salt Water Creek, New River, South Carolina
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Turnbridge Landing
Click for Map
Mon -- 12:11 AM EST     7.05 feet High Tide
Mon -- 05:46 AM EST     -0.29 feet Low Tide
Mon -- 07:17 AM EST     Sunrise
Mon -- 11:08 AM EST     Moonset
Mon -- 12:35 PM EST     8.35 feet High Tide
Mon -- 05:21 PM EST     Sunset
Mon -- 06:23 PM EST     -0.01 feet Low Tide
Mon -- 10:05 PM EST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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76.75.63.81.80.2-0.30.52.14.26.17.58.28.37.35.53.41.30.10.21.22.74.45.7

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Mon -- 02:47 AM EST     -1.98 knots Max Ebb
Mon -- 05:51 AM EST     0.00 knots Slack
Mon -- 07:17 AM EST     Sunrise
Mon -- 08:34 AM EST     2.47 knots Max Flood
Mon -- 11:07 AM EST     Moonset
Mon -- 12:19 PM EST     -0.00 knots Slack
Mon -- 03:17 PM EST     -2.33 knots Max Ebb
Mon -- 05:20 PM EST     Sunset
Mon -- 06:37 PM EST     0.00 knots Slack
Mon -- 09:05 PM EST     1.96 knots Max Flood
Mon -- 10:05 PM EST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.1-1.1-1.8-2-1.7-10.21.52.32.41.91.20.3-0.8-1.8-2.3-2.2-1.8-0.80.51.521.71.3

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (4,6,7,8)
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Ground Weather Radar Station Charleston, SC
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