Sunrise 6:28 AM   Sunset 8:04 PM Moonrise 2:46 AM   Moonset 2:15 PM

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AMZ330 Charleston Harbor- 259 Am Edt Fri May 3 2024
Today - SE winds 5 kt, increasing to 10 kt this afternoon. Patchy fog early this morning.Tonight - SE winds 5 to 10 kt. Sat - SE winds 5 kt, increasing to 10 kt in the afternoon. A slight chance of showers and tstms in the afternoon. Sat night - S winds 10 kt. A slight chance of showers and tstms.Sun - S winds 5 to 10 kt. A chance of showers and tstms. Sun night - S winds 5 to 10 kt. A slight chance of showers and tstms in the evening. Mon - SW winds 5 to 10 kt. A chance of showers and tstms. Mon night - S winds 10 kt. A slight chance of showers and tstms.Tue - SW winds 10 to 15 kt. A slight chance of showers and tstms. Tue night - SW 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 73 degrees.

AMZ300 259 Am Edt Fri May 3 2024
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia - Atlantic high pressure will remain across the southeast through much of next week.

FXUS62 KCHS 030739 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 339 AM EDT Fri May 3 2024

SYNOPSIS
Atlantic high pressure will remain across the Southeast through much of next week.

NEAR TERM /THROUGH TONIGHT/
This morning: Satellite imagery, surface observations, and webcams showing some fog and stratus developing across parts of the area. This is a little later than it was yesterday morning, and also there is less coverage so far. However, there is a strong inversion just off the surface, and with dew point depressions down near or at zero, the fog will expand in coverage. Since we're still not certain that there will be enough dense fog, no Dense Fog Advisory has been issued. The fog (whether it's dense or not) will dissipate by 9-10 am since the depth of the fog is somewhat shallow.

Today: The mid level ridging of recent days will shift off the coast of the Southeast, while Atlantic high pressure is the main feature at the surface. The synoptic flow is southeasterly through the day, resulting in a sea breeze dominant regime.
After fog dissipates, scattered to broken cumulus will prevail, while varying amounts of cirrus clouds pass through. There will certainly be sufficient insolation, and temperatures will be very similar to yesterday. We didn't go quite as warm as the 1000-850 mb thickness progs, but with a blend of the MOS and NBM, we arrive at highs in the mid and upper 80s. Coastal sections will be 5-10F cooler.

A subtle level level impulse will approach from the west- southwest late in the day, and this will cause isolated to scattered convection upstream from our Georgia counties to approach. There will be some interaction of this activity with the inland moving sea breeze after 3 or 4 pm, where we show slight chance PoPs close to and west of the US-301 corridor (Allendale to Tattnall County). There is little buoyancy, plus limited MLCAPE and shear, so no strong or severe storm will occur.

Tonight: A better looking short wave trough moves through the Tennessee Valley and northern Gulf coast. This along with any outflow boundaries from prior convection in and near the area, will allow for isolated or scattered showers and a few t-storms to occur. This is mainly far inland sections. There will be at least some form of fog again after midnight given the southeast and south flow in the boundary layer. However, there is likely too much mid and high level clouds from the nearby convection for dense fog to occur. We currently have mention of the "patchy" fog qualifier, and we will monitor for any dense fog potential. Low temperatures will be several degrees above climo.

SHORT TERM /SATURDAY THROUGH MONDAY/
A mid-level ridge axis will push off the Southeast coast Saturday with passing waves of shortwave energy across the region through the short term forecast period. High pressure will remain the primary feature at the surface. Convection should be a bit more active over the weekend and into Monday with the presence of deeper moisture as PWATs increase to 1.5+ inches. Coverage of showers/thunderstorms will be highest in the daytime when instability is maximized, but with some upper forcing in play activity could linger into the overnight period. The greatest chances are focused away from the immediate coast owing to a progressive sea breeze.

High temperatures will generally peak in the low to mid 80s over the weekend, warming into the mid to upper 80s Monday. Overnight lows are only expected to drop to the mid to upper 60s, with locations right along the beaches and Downtown Charleston near 70 degrees.

LONG TERM /MONDAY NIGHT THROUGH THURSDAY/
Atlantic high pressure will persist through the middle of next week.
Chances for showers/thunderstorms are limited Tuesday as weak forcing/remnant shortwave energy passes offshore the Mid Atlantic coast. Beyond Tuesday, rainfall chances are little to none as a ridge rebuilds overhead. This will allow max temperatures to rise into the low/mid 90s by mid next week, possibly approaching record levels by Wednesday/Thursday.

AVIATION /07Z FRIDAY THROUGH TUESDAY/
KCHS/KJZI/KSAV: Fog and stratus are still expected to occur during the pre-dawn through mid morning, and dense fog and conditions down near or below airfield minimums are possible for several hours. Expect there to be updates, but for now we have the worst conditions at all terminals between 09Z and 13Z.
It's possible that with a southeast synoptic flow, the fog and stratus might be mainly inland from KJZI.

VFR will return around 1300-1330Z, and continue into tonight.
There are no concerns for SHRA or TSRA at any the terminals with the 06Z TAFs.

Extended Aviation Outlook: Scattered showers and thunderstorms are possible through Monday.

MARINE
Today: High pressure from the Atlantic will be the main feature, and even with sea breeze influences this afternoon, SE winds will be no more than about 10 kt. Seas will be only around 2 feet. Even though it is light, the onshore flow will keep any land based fog off the Atlantic. The exceptions will be Charleston Harbor (especially the northern part of the harbor near the North Charleston Port) and the Port of Savannah, where some of the nearby fog from over the land could drift into those areas early this morning. At this time no Dense Fog Advisory is planned.

Tonight: Weak high pressure continues across the maritime community. Once again the SE winds are no more than about 10 kt, with seas just 2 feet. Maybe some fog could impact Charleston Harbor and the Port of Savannah, as it tries to expand in from nearby land sections.

Saturday through Wednesday: Atlantic high pressure will maintain benign conditions over the local waters. Southerly winds in the morning will back out of the southeast during the afternoon and evening hours nearly each day as the sea breeze develops. Winds will average 10-15 kt with seas 2-3 ft.

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

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Charleston
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Fri -- 03:46 AM EDT     Moonrise
Fri -- 04:19 AM EDT     5.50 feet High Tide
Fri -- 06:30 AM EDT     Sunrise
Fri -- 10:40 AM EDT     0.12 feet Low Tide
Fri -- 03:15 PM EDT     Moonset
Fri -- 04:51 PM EDT     5.48 feet High Tide
Fri -- 08:03 PM EDT     Sunset
Fri -- 11:08 PM EDT     0.29 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Charleston, South Carolina, Tide feet

Charleston Harbor Entrance
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Fri -- 01:05 AM EDT     1.51 knots Max Flood
Fri -- 03:46 AM EDT     Moonrise
Fri -- 04:49 AM EDT     -0.00 knots Slack
Fri -- 06:29 AM EDT     Sunrise
Fri -- 08:12 AM EDT     -2.37 knots Max Ebb
Fri -- 11:15 AM EDT     0.00 knots Slack
Fri -- 01:34 PM EDT     1.63 knots Max Flood
Fri -- 03:15 PM EDT     Moonset
Fri -- 05:15 PM EDT     -0.00 knots Slack
Fri -- 08:02 PM EDT     Sunset
Fri -- 08:38 PM EDT     -2.27 knots Max Ebb
Fri -- 11:43 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

Charleston Harbor Entrance, South Carolina Current, knots

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