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AMZ330 Charleston Harbor- 618 Pm Est Thu Nov 30 2023
Tonight..E winds 5 to 10 kt.
Fri..S winds 5 to 10 kt. A slight chance of showers in the afternoon.
Fri night..S winds 5 to 10 kt. A chance of showers in the evening, then showers likely after midnight.
Sat..S winds 5 to 10 kt. Showers likely. A slight chance of tstms in the afternoon.
Sat night..SW winds 10 kt. A slight chance of tstms. Showers, mainly in the evening.
Sun..SW winds 10 kt. Showers likely with a slight chance of tstms.
Sun night..SW winds 10 kt. A chance of showers.
Mon..W winds 10 to 15 kt. A slight chance of showers.
Mon night..NW winds 10 to 15 kt.
Tue..W winds 10 kt.
Tue night..W winds 10 to 15 kt.
winds and waves higher in and near tstms.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 59 degrees.

AMZ300 618 Pm Est Thu Nov 30 2023
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail across the region tonight. A warm front will shift through the area Friday, before a cold front arrives late Sunday. High pressure will then prevail during the middle of next week.

FXUS62 KCHS 010011 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 711 PM EST Thu Nov 30 2023

SYNOPSIS
High pressure will prevail across the region tonight. A warm front will shift through the area Friday, before a cold front arrives late Sunday. High pressure will then prevail during the middle of next week.

NEAR TERM /UNTIL 6 AM FRIDAY MORNING/
Tonight: The forecast area will remain between high pressure over the Atlantic and a large low pressure system over the Great Plains. Near term guidance indicates that an inverted trough/warm front will develop off the coast tonight. The warm front is expected to move onshore during the pre-dawn hours late tonight/Friday morning. In the wake of the warm front, sfc temperatures are forecast to warm a degree or two an hour until sunrise. The updated forecast will indicate the low temperature across the coastal counties will occur between 7-8Z, followed by a gradual warm up. Otherwise, conditions should feature a partly to mostly cloudy sky with light winds.

SHORT TERM /6 AM FRIDAY MORNING THROUGH SUNDAY/
Friday and Saturday: A low pressure system tracking from the Central Plains to the Mid Atlantic region will help pull a warm front across the region Friday, keeping the Southeast warm-sectored through much of the weekend. Widespread clouds and increasing precip chances will accompany the changing weather pattern. Expect shower coverage to increase Friday evening as moisture advection results in PWATs between 1.25 to 1.5 inches late day while h5 shortwave energy ripples across the area and a h25 jet nudges closer to the Mid- Atlantic and Southeast. Persistent south- southwest flow across the region on Saturday will continue to drive moisture levels up locally with PWATs approaching 2.0 inches while mid-upper lvl forcing aloft remain. Given the setup, expect numerous to widespread showers.
Rainfall amounts between 1 to 1.5 inches will be common across the area on Saturday alone.

High temps are expected to peak in low to mid 70s Friday before the onset of rain late. Temps should still peak in the low to mid 70s Saturday as well with a southerly wind in place. Overnight lows will be mild each night, remaining in the upper 50s to lower 60s Friday night and low to mid 60s Saturday night.

Sunday: Another wet day is in store with a plume of deep moisture (PWATS nearing 2.0 inches) extending across the Southeast United States while the area remains warm-sectored until a cold front arrives late. Mid-upper lvl forcing associated with h5 shortwave energy and favorable divergence with a passing h25 jet will continue to support numerous showers for much of the day and even a few thunderstorms across southeast Georgia and portions of Southwest South Carolina before nightfall. High temps should top out in the lower 70s.

LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/
A wet and mild pattern will remain in place Sunday night until a cold front pushes through the local area late. Rain chances will shift offshore and decrease rapidly after midnight despite upper forcing associated with passing h5 shortwave energy, as a much drier air mass moves into the area behind the front. Surface high pressure will then build in from the west and dry and cooler conditions will prevail during the middle of next week. Outside of Monday where temperatures will top out in the mid to upper 60s, temps will drop to below normal in the wake of the front with highs in the upper 50s to low 60s through the long-term period.

AVIATION /00Z FRIDAY THROUGH TUESDAY/
VFR conditions will prevail at KCHS, KJZI, and KSAV through 00z Saturday.

Extended Aviation Outlook: Flight restrictions are possible with showers at all terminals Friday night, then likely with numerous/widespread showers, low clouds and reduced vsbys at all terminals Saturday into Sunday afternoon. Conditions should then improve to VFR at all terminals for Monday.

MARINE
Tonight: SE winds through the overnight period with wind speeds no more than 10 knots, with a modest increase into the 10-15 knot range late in the overnight. Seas should average around 2 feet, with up to 3 feet possible in the 20-60 nm offshore GA waters late tonight.

Friday through Tuesday: A low pressure system tracking from the Central Plains to the Mid Atlantic region will help pull a warm front across the region Friday, resulting in a southerly wind around 10-15 kt across the local waters. Seas will gradually build up to 3- 4 ft, and possibly as high as 5 feet, by Sunday morning ahead of an approaching cold front. Then, a cold front should traverse the region Sunday night into Monday, favoring a stronger gradient across the local waters, shifting winds primarily out of the west. Gusts around 20 kt are likely across the waters Monday and Monday night.
However, brief Small Craft Advisories are possible for 25 kt gusts mainly across the outer Georgia waters from 20-60nm during this time. On Tuesday, marine conditions will begin to improve with W/SW winds decreasing to 10 kt and seas dropping to 1-3 feet.

Sea Fog: There is some potential for sea fog to develop across nearshore waters this weekend as mid 60 dewpts spread across cooler waters while winds remain lighter and more parallel to the coast.
The best window for sea fog appears to occur Saturday and Sunday and could eventually be added to the forecast if the signal and higher confidence for the event persists.

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

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Steamboat Landing
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Thu -- 03:47 AM EST     0.16 feet Low Tide
Thu -- 07:04 AM EST     Sunrise
Thu -- 10:18 AM EST     Moonset
Thu -- 10:37 AM EST     6.95 feet High Tide
Thu -- 04:31 PM EST     0.81 feet Low Tide
Thu -- 05:15 PM EST     Sunset
Thu -- 08:08 PM EST     Moonrise
Thu -- 10:57 PM EST     5.41 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Steamboat Landing, Steamboat Creek, South Carolina, Tide feet

Boy Scout Camp
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Thu -- 03:52 AM EST     0.15 feet Low Tide
Thu -- 07:03 AM EST     Sunrise
Thu -- 10:18 AM EST     Moonset
Thu -- 10:41 AM EST     6.89 feet High Tide
Thu -- 04:36 PM EST     0.77 feet Low Tide
Thu -- 05:14 PM EST     Sunset
Thu -- 08:07 PM EST     Moonrise
Thu -- 11:01 PM EST     5.36 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Boy Scout Camp, Bohicket Creek, South Carolina, Tide feet

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