Sunrise 6:48 AM   Sunset 7:57 PM Moonrise 3:18 PM   Moonset 3:48 AM

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AMZ354 Waters From Savannah Ga To Altamaha Sound Ga Out 20 Nm, Including Grays Reef National Marine Sanctuary- 717 Am Edt Fri Apr 19 2024
Today - SW winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas 2 ft. Wave detail: se 2 ft at 9 seconds and E 1 ft at 14 seconds.Tonight - SW winds 10 kt. Seas 2 to 3 ft. Wave detail: se 3 ft at 9 seconds and S 2 ft at 4 seconds. Sat - W winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave detail: S 2 ft at 4 seconds and E 2 ft at 8 seconds. A slight chance of showers and tstms in the afternoon. Sat night - SW winds 10 kt, becoming W after midnight. Seas 2 to 3 ft. Wave detail: S 2 ft at 4 seconds and se 2 ft at 8 seconds. A chance of showers and tstms. Sun - NW winds 5 to 10 kt, becoming ne in the afternoon. Seas 2 to 3 ft. Wave detail: E 2 ft at 8 seconds and S 1 ft at 4 seconds. A slight chance of showers in the morning, then a chance of showers and tstms in the afternoon. Sun night - N winds 10 to 15 kt. Seas 2 to 3 ft. Wave detail: ne 2 ft at 3 seconds and E 2 ft at 8 seconds. Showers likely with a chance of tstms in the evening, then showers likely with a slight chance of tstms after midnight. Mon - N winds 15 kt. Seas 2 to 3 ft. A slight chance of showers.Mon night - N winds 15 kt. Seas 2 to 3 ft. Tue - NE winds 10 to 15 kt. Seas 2 to 3 ft. Tue night - SE winds 5 to 10 kt. Seas 2 to 3 ft.
winds and seas higher in and near tstms.

AMZ300 717 Am Edt Fri Apr 19 2024
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia - A slow moving front will bring unsettled weather to the region today through early next week. High pressure will then return and prevail into the middle of next week.

FXUS62 KCHS 191142 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 742 AM EDT Fri Apr 19 2024

SYNOPSIS
A slow moving front will bring unsettled weather to the region today through early next week. High pressure will then return and prevail into the middle of next week.

NEAR TERM /THROUGH TONIGHT/
Today: H5 shortwave energy will traverse the local area early this morning, attempting to produce a few showers before reaching the coast by late morning. Model soundings continue to indicate a fairly large amount of low-mid level dry air, suggesting activity remaining quite limited during the next couple hours.

Heading into the late morning hours, conditions remain dry with a west-northwest downslope wind in place aloft and sfc high pressure prevailing across the Southeast for much of the day.
Latest guidance has taken a step back in regards to precip potential locally, especially in regards to stronger thunderstorm potential this afternoon. Much of the convection anticipated locally today should be associated with a seabreeze circulation taking shape by early afternoon, then gradually pushing inland through mid-late afternoon. Wind fields are not all that impressive as this occurs and the bulk of large scale dynamic forcing remains well displaced to the northwest closer to a sfc cold front making way across the Midlands late day. However, ample sfc heating will take place and the downslope wind aloft will also support warmer temps in advance of the front during the day. High temps in the upper 80s to around 90 degrees away from the coast along with sfc dewpts in the low-mid 60s support modest inability as convection initiates and makes a gradually push inland, but thunderstorms will likely remain pulse type in nature and sub-severe with a lack of stronger forcing present.
The bulk of precip coverage should occur across southeast South Carolina, with peak coverage occurring late afternoon across far inland areas.

Tonight: Convection experienced during late afternoon hours will likely wane or diminish early evening due to the loss of diurnal heating. The first half of the night will likely remain dry across all areas while weak high pressure lingers across the area ahead of a cold front slowly approaching toward northwest tier counties of southeast South Carolina. The flow aloft remains zonal, suggesting the front will struggle to reach the local area after midnight, but could produce a few showers/thunderstorms across northern parts of Berkeley and Charleston Counties before daybreak. Given the timing of the front late night and the likelihood of it remaining just to the north while sliding offshore indicates the threat for stronger thunderstorms to be low. Low temps should remain mild with a light south-southwest wind in place under clouds, generally in the mid- upper 60s.

SHORT TERM /SATURDAY THROUGH MONDAY/
A slow moving cold front will linger over the region on Saturday, with some southward push later in the day and overnight. The morning hours should be dry then the potential for thunderstorms will increase as we move later into the afternoon and evening, though coverage is still a bit uncertain. Shear is only around 20 knots when instability is maximized, so overall severe threat is low but a stronger storm cannot be ruled out. Otherwise, high temperatures creep back up into the upper 80s/around 90 away from the immediate coast. Lows Saturday night will be in the 60s.

The aforementioned front will still be in the vicinity Sunday morning, likely extending from off the SC coast down into southeast GA, before sinking further south with time. Better forcing will arrive as shortwave energy passes across the region which should lead to an uptick in precip coverage. PoPs peak 60-80%. Thunder potential looks to be limited closer to the coast and across southeast GA. Temperatures will be tricky given much will depend on positioning of the front, but overall it will be notably cooler than previous days especially inland and in northern areas. Highs generally span the 70s, with around 80 near the Altamaha ahead of the front. Highest rain chances transition offshore Sunday night.
Low temperatures will be in the 50s.

The front will be well to the east on Monday with high pressure inland. Main upper wave swings through later in the day which could lead to additional shower development especially along the coast where deeper moisture resides. High temperatures top out in the mid to upper 60s.

LONG TERM /MONDAY NIGHT THROUGH THURSDAY/
High pressure will prevail into midweek, before a cold front possibly passes through Wednesday night/early Thursday. There doesn't appear to be a lot of moisture to work with so a dry forecast was maintained for now.

AVIATION /12Z FRIDAY THROUGH TUESDAY/
VFR conditions will prevail at CHS/JZI/SAV terminals through 12Z Saturday. The risk for a shower/thunderstorm at CHS/JZI Friday afternoon remains too low to include at the terminals at this time, but activity could approach CHS/JZI terminals for a few hours early afternoon as a seabreeze circulation shifts inland.

Extended Aviation Outlook: A slow moving front could bring occasional flight restrictions late Saturday through Monday.

MARINE
Today and Tonight: High pressure will remain the dominant weather feature across local waters into early night before a cold front approaches from the northwest, eventually shifting offshore after midnight near or just north of the area. Conditions will remain quiet through the day, with southwest winds around 10 kt or less early morning turning more south and gusting to 10-15 kt in the afternoon as a seabreeze develops, then pushes inland. Even with the front approaching late tonight, sfc winds should tip back to the south-southwest during the first half of the night and show signs of decreasing. The pressure gradient will remain fairly weak for much of the night, but there could be a slight uptick in southwest winds late (around 15 kt) as gradient eventually becomes stronger approaching daybreak. Seas will range between 2-3 ft, but should gradually build overnight with 4 ft seas possible across offshore Georgia waters late.

Saturday through Wednesday: South to southwest winds will persist through Saturday, before a slow moving cold front sinks south through the waters later in the weekend. Main time period of concern will be Sunday night through Monday when winds peak in the 15-20 kt range behind the front. A few gusts to 25 knots will be possible over portions of the waters. Winds ease on Tuesday with no additional concerns through Wednesday.

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

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Savannah Sheraton Resort Hotel
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Fri -- 04:47 AM EDT     Moonset
Fri -- 05:57 AM EDT     7.20 feet High Tide
Fri -- 06:49 AM EDT     Sunrise
Fri -- 12:18 PM EDT     1.02 feet Low Tide
Fri -- 04:17 PM EDT     Moonrise
Fri -- 06:34 PM EDT     7.32 feet High Tide
Fri -- 07:56 PM EDT     Sunset
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Savannah River Entrance
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Fri -- 12:41 AM EDT     0.00 knots Slack
Fri -- 03:20 AM EDT     1.69 knots Max Flood
Fri -- 04:47 AM EDT     Moonset
Fri -- 06:49 AM EDT     -0.00 knots Slack
Fri -- 06:49 AM EDT     Sunrise
Fri -- 10:27 AM EDT     -1.69 knots Max Ebb
Fri -- 12:57 PM EDT     0.00 knots Slack
Fri -- 03:40 PM EDT     1.72 knots Max Flood
Fri -- 04:16 PM EDT     Moonrise
Fri -- 07:19 PM EDT     -0.00 knots Slack
Fri -- 07:55 PM EDT     Sunset
Fri -- 10:59 PM EDT     -1.89 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION

Savannah River Entrance, Georgia Current, knots

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