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AMZ354 Waters From Savannah Ga To Altamaha Sound Ga Out 20 Nm, Including Grays Reef National Marine Sanctuary- 607 Pm Est Tue Dec 5 2023
.small craft advisory in effect from 4 am est Wednesday through Wednesday evening...
Tonight..W winds 10 to 15 kt with gusts to 20 kt, becoming nw 15 to 20 kt with gusts to 25 kt after midnight. Seas 2 to 3 ft.
Wed..NW winds 15 to 20 kt with gusts to 25 kt. Seas 2 to 3 ft.
Wed night..N winds 15 to 20 kt with gusts to 25 kt. Seas 2 to 3 ft.
Thu..NE winds 10 to 15 kt with gusts to 20 kt, becoming N 5 kt in the afternoon. Seas 2 to 3 ft.
Thu night..S winds 5 kt. Seas 2 ft.
Fri..Variable winds 5 kt. Seas 2 ft.
Fri night..SE winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight.
Sat..SE winds 5 to 10 kt. Seas 2 ft. A slight chance of showers.
Sat night..SE winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers.
Sun..SW winds 15 to 20 kt. Seas 4 to 5 ft. Showers likely.
Sun night..NW winds 15 to 20 kt. Seas 4 to 5 ft. A chance of showers.

AMZ300 607 Pm Est Tue Dec 5 2023
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A dry cold front will drop through the area tonight, followed by high pressure through Saturday. The next weather system will arrive Saturday night into Sunday. High pressure will return early next week.

FXUS62 KCHS 052334 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 634 PM EST Tue Dec 5 2023

SYNOPSIS
A dry cold front will drop through the area tonight, followed by high pressure through Saturday. The next weather system will arrive Saturday night into Sunday. High pressure will return early next week.

NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/
Tonight: Short-wave trough will advance to the Atlantic Coast through the course of the night and into the Atlantic on Wednesday. This will drive a dry cold front through the southeast coast and timed to move offshore around sunrise Wednesday. No precipitation anticipated this far south, but the tail end of the associated cloud cover may skirt through the region during the late overnight/Wednesday morning timeframe.

Surface winds will go light or calm in many places this evening hours, but will increase overnight with the cool air surge and some degree of deeper mixing taking shape. But even with a bit of a surface wind, temperatures will fall through the 40s through the course of the night...a little warmer along the coast.

Winds on Lake Moultrie will become NW 15-20 kt after midnight, but not enough for a Lake Wind Advisory.

SHORT TERM /6 AM WEDNESDAY MORNING THROUGH FRIDAY/
An upper trough and its associated surface cold front will push offshore early Wednesday. Although there could be a few showers associated with the FROPA over the offshore waters in the morning, land areas are expected to stay dry. An enhanced pressure gradient behind the departing front will lead to breezy conditions Wednesday with gusts around 20 mph. Gusts around 20 kt across Lake Moultrie could approach 25 kt, but at this point a Lake Wind Advisory is not expected, as conditions should remain shy of criteria. Cool high pressure will build in the wake of the front, which will shift overhead on Thursday. Model soundings show increasing subsidence Wednesday into Thursday, and coupled with a dry air mass, will result in clear skies both days.

By Friday, the surface high will propagate eastward into the Atlantic. Cloud cover will increase as return flow draws Gulf moisture into the region. Still, no precipitation is expected Friday as the area remains largely under the influence of high pressure and lingering subsidence.

Temperatures will be cooler Wednesday and Thursday, with highs in the mid/upper 50s. Friday will be slightly warmer with highs in the low to mid 60s. Wednesday night will be the coldest night of the week with locations away from the coast plummeting below freezing.
Some spots could even dip into the upper 20s far inland. Closer to the coast, lows will range from the mid to upper 30s. Thursday night is not expected to be as cold with min temperatures a few degrees warmer.

LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/
Shortwave energy aloft and return flow feeding deeper moisture into the Southeast U.S. could generate shower activity Saturday, mainly along the coastal areas where we show POPs around 20-30%. A deep upper trough and strong cold front will then approach from the west Saturday night before crossing the area Sunday. This system could bring scattered to numerous showers to the area. Rain chances will ramp up Saturday night before clearing out Sunday night. Thereafter, high pressure will build across the eastern U.S. early next week.
Mild, above normal temperatures over the weekend will decrease to slightly below normal behind the front early next week.

AVIATION /00Z WEDNESDAY THROUGH SUNDAY/
VFR conditions will to prevail at KCHS, KJZI, and KSAV terminals through 00Z Thursday. N-NW winds will be gusty as deep mixing develops and the gradient tightens from strong high pressure centered in the lower and middle Mississippi Valley. Speeds will average around 15 kt with gusts near or in excess of 20 kt, before dropping considerably around sunset.

Extended Aviation Outlook: VFR through Saturday morning. Gusty winds around 15-20 kt are possible at the terminals on Wednesday.

MARINE
A cold front will pass through the coastal waters overnight.
Winds veer into the northwest and steadily strengthen as the gradient tightens and cold advection allows for deeper mixing profiles across the local waters. By sunrise Wednesday winds across the nearshore waters are expected to be 15-20 knots with gusts to 25 knots. The outer waters should be in the 20-25 knot range. Going Small Craft Advisories will remain intact. Seas will be 2-3 feet through this evening, increasing to 3-4 feet by late tonight with up to 5 feet in the outer Georgia waters.

Wednesday through Sunday: Small Craft Advisories for gusty northwest winds will continue into Wednesday night for all local waters outside the Charleston Harbor. Gusty winds and elevated seas around 3-5 feet will subside Thursday as conditions improve due to high pressure settling across the area. Thereafter, tranquil conditions are expected into Saturday with light winds and calm seas before conditions deteriorate quickly late Saturday night ahead of a strong cold front.

CHS WATCHES/WARNINGS/ADVISORIES
GA...None.
SC...None.
MARINE...Small Craft Advisory from 1 AM to 10 PM EST Wednesday for AMZ350.
Small Craft Advisory from 4 AM to 10 PM EST Wednesday for AMZ352-354.
Small Craft Advisory from 1 AM Wednesday to 1 AM EST Thursday for AMZ374.

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Cane Patch Creek entrance
Click for Map
Tue -- 12:05 AM EST     Moonrise
Tue -- 12:51 AM EST     Last Quarter
Tue -- 02:31 AM EST     6.11 feet High Tide
Tue -- 07:09 AM EST     Sunrise
Tue -- 08:16 AM EST     1.63 feet Low Tide
Tue -- 01:08 PM EST     Moonset
Tue -- 02:42 PM EST     6.67 feet High Tide
Tue -- 05:20 PM EST     Sunset
Tue -- 08:46 PM EST     1.46 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Cane Patch Creek entrance, Georgia, Tide feet

Savannah River Entrance
Click for Map
Tue -- 12:03 AM EST     Moonrise
Tue -- 12:51 AM EST     Last Quarter
Tue -- 02:48 AM EST     -0.00 knots Slack
Tue -- 05:55 AM EST     -1.34 knots Max Ebb
Tue -- 07:09 AM EST     Sunrise
Tue -- 08:57 AM EST     0.00 knots Slack
Tue -- 11:29 AM EST     1.48 knots Max Flood
Tue -- 01:07 PM EST     Moonset
Tue -- 02:55 PM EST     -0.00 knots Slack
Tue -- 05:18 PM EST     Sunset
Tue -- 05:33 PM EST     -1.44 knots Max Ebb
Tue -- 09:10 PM EST     0.00 knots Slack
Tue -- 11:52 PM EST     1.60 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION

Savannah River Entrance, Georgia Current, knots

Full Color Weather Map

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