Sunrise 6:35 AM   Sunset 8:07 PM Moonrise 2:16 AM   Moonset 1:12 PM

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AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 1233 Am Edt Thu May 2 2024
Rest of tonight - S winds 5 kt. Seas 2 ft. Wave detail: S 1 foot at 6 seconds and E 1 foot at 11 seconds. Thu - NE winds 5 kt, becoming E in the afternoon. Seas 2 ft. Wave detail: se 2 ft at 6 seconds and E 1 foot at 11 seconds. Thu night - SE winds 5 to 10 kt. Seas 2 ft. Wave detail: se 2 ft at 6 seconds and E 1 foot at 10 seconds. Fri - SE winds 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 2 ft. Wave detail: se 2 ft at 6 seconds and E 1 foot at 9 seconds. Fri night - SE winds 5 to 10 kt. Seas 2 ft. Wave detail: se 2 ft at 6 seconds and E 1 foot at 9 seconds. Sat - S winds 5 to 10 kt. Seas 2 ft. Wave detail: se 2 ft at 6 seconds and E 1 foot at 11 seconds. A slight chance of showers and tstms. Sat night - SE winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms. Sun - S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. Sun night - S winds 10 kt. Seas 2 to 3 ft. Mon - S winds 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. Mon night - S winds 10 kt. Seas 2 to 3 ft.
winds and seas higher in and near tstms.

AMZ300 1233 Am Edt Thu May 2 2024
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia - Atlantic high pressure will extend west across the southeast u.s. Into next week.

FXUS62 KCHS 020527 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 127 AM EDT Thu May 2 2024

SYNOPSIS
Atlantic high pressure will extend west across the Southeast U.S. into next week.

NEAR TERM /UNTIL 6 AM THIS MORNING/
We were hopeful that the dense fog potential would have become more apparent by this time. But no, it hasn't. Guidance is many cases has initialized poorly in regards to the fog, so confidence is not as high as we would like. GOES Night Fog Product satellite imagery does show some low stratus and fog starting to develop, especially over Colleton, Dorchester, and Hampton County. So this may be the start of it expanding given mostly clear skies, calm winds near zero dew point depressions, and favorable condensation pressure deficits. We made no changes to the coverage of the fog from previous, and it is still likely that a Dense Fog Advisory could be required for at least parts of the area. The higher probabilities might be where it rained on Wednesday, we shall see. We did tweak a few temperatures, but overall no major changes with the post- midnight update.

SHORT TERM /6 AM THIS MORNING THROUGH SATURDAY/
Thursday and Friday: Strong subtropical ridging aloft will dominate the Southeast U.S. both days with the area located along the western flanks of Atlantic surface high pressure centered well offshore. While low-level moisture will remain somewhat seasonable with dewpoints in the 50s and 60s, broad subsidence aloft and the resulting lack of any meaningful mixed- layered instability will support a mainly dry forecast through the period. A rouge shower can not be completely ruled out Friday afternoon ahead of the sea breeze as the upper ridge shifts offshore and mid-level capping weakens a bit, but chances for anything measurable will likely remain below the mentionable threshold of 20%. A few showers/tstms could drift into into the far inland areas from the west Friday evening as weak shortwave energy passes by to the north and west. Forecast soundings at KRBW, KJYL and KMHP show a steadily weakening mid- level cap during this time as the upper ridge shifts farther out into the Atlantic. Slight chance pops around 20% were maintained across the interior to account for this. Highs will warm into the mid-upper 80s each afternoon away from the beaches with overnight lows dropping into the mid 60s well inland to near 70 at the beaches.

Saturday: The risk for scattered showers/tstms will increase on Saturday as a weak mid-level weakness settles across the Southeast States. Forcing for ascent will remain fairly weak and ill-defined in the vicinity of the weakness per model omega vertical cross-sections, but weak to moderate instability coupled with low-level convergence near a fairly progressive sea breeze circulation and potential convective outflow interactions would support a slightly more active day compared to the previous few where subtropical ridging dominated aloft.
20-60% pops were maintained Saturday with the highest gridded pops clustered well inland ahead of the sea breeze. Highs will warm into the lower-mid 80s.

LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/
The pattern will be more reminiscent of summer next week. The weak mid-level weakness over the Southeast U.S. will quickly begin to fill and push offshore Saturday night into Sunday with broad, subtropical ridging dominating aloft thereafter. The region will remain along the western periphery of Atlantic surface high pressure centered well offshore. This pattern will support a more typical, diurnal convective pattern with activity generally concentrating along/ahead of the afternoon seas breeze with the best rain chances concentrating in the Saturday and Sunday periods with the weakness aloft. Weak shortwave energy is progged to pass by to the north on Monday, but most of the forcing with this feature looks to remain over the Pee Dee into central/eastern North Carolina. Temperatures will slowly rise through the period, peaking in the upper 80s to lower 90s by Tuesday.

AVIATION /06Z THURSDAY THROUGH MONDAY/
KCHS/KJZI/KSAV: All terminals look to experience prevailing flight restrictions in stratus and fog through mid morning.
KCHS and KJZI could even get down to LIFR and airfield minimums, while KSAV could at least drop to alternate airfield minimums.
VFR will then prevail after about 1330-1400Z, with SE winds around 10-12 kt in wake of the afternoon sea breeze. But no convection will occur on that boundary as it moves inland. There will likely be some fog/stratus again tonight and this will be handled in later TAF issuances.

Extended Aviation Outlook: Flight restrictions possible in overnight/early morning fog and stratus. Isolated to scattered showers and thunderstorms are possible Saturday through Monday.

MARINE
Overnight: Surface high pressure and relaxed pressure gradient will remain in control across the coastal waters resulting in overall light winds at no higher than 5 or 10 kt, with seas mainly around 2 feet. As we go through the pre-dawn hours there will be the formation of fog over land areas, some of which could move into the Charleston Harbor and the Atlantic waters very close to shore. We'll need to monitor for a Dense Fog Advisory.

Thursday through Sunday: There are no major concerns through the period. A broad southerly flow will prevail through the weekend with the local waters located along the western periphery of Atlantic high pressure centered well offshore.
Typical sea breeze wind enhancements are expected each afternoon along the land/sea interface and Charleston Harbor. Seas will generally remain 3 ft or less through the period.

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

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Purrysburg Landing
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Wed -- 02:38 AM EDT     Moonrise
Wed -- 04:20 AM EDT     3.09 feet High Tide
Wed -- 06:37 AM EDT     Sunrise
Wed -- 07:27 AM EDT     Last Quarter
Wed -- 12:23 PM EDT     0.26 feet Low Tide
Wed -- 01:02 PM EDT     Moonset
Wed -- 04:51 PM EDT     2.84 feet High Tide
Wed -- 08:05 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Purrysburg Landing, Savannah River, South Carolina, Tide feet

Savannah River Entrance
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Wed -- 02:36 AM EDT     Moonrise
Wed -- 03:53 AM EDT     -0.00 knots Slack
Wed -- 06:36 AM EDT     Sunrise
Wed -- 07:01 AM EDT     -1.80 knots Max Ebb
Wed -- 07:27 AM EDT     Last Quarter
Wed -- 10:14 AM EDT     0.00 knots Slack
Wed -- 12:41 PM EDT     1.57 knots Max Flood
Wed -- 01:02 PM EDT     Moonset
Wed -- 04:12 PM EDT     -0.00 knots Slack
Wed -- 06:50 PM EDT     -1.51 knots Max Ebb
Wed -- 08:04 PM EDT     Sunset
Wed -- 10:15 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

Savannah River Entrance, Georgia Current, knots

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