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AMZ330 Charleston Harbor- 1149 Am Est Mon Dec 11 2023
This afternoon..N winds 10 to 15 kt, diminishing to 5 to 10 kt.
Tonight..N winds 5 kt.
Tue..NE winds 5 to 10 kt.
Tue night..N winds 10 kt.
Wed..NE winds 10 to 15 kt.
Wed night..NE winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Waves 1 to 2 ft.
Thu..NE winds 20 kt. Waves 1 to 2 ft.
Thu night..NE winds 15 to 20 kt. Waves 1 to 2 ft.
Fri..NE winds 15 to 20 kt. Waves 1 to 2 ft.
Fri night..NE winds 15 kt.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 60 degrees.

AMZ300 1149 Am Est Mon Dec 11 2023
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Cool high pressure will build over the area this week. A coastal low pressure system may impact the area next weekend.

FXUS62 KCHS 111654 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 1154 AM EST Mon Dec 11 2023

SYNOPSIS
Cool high pressure will build over the area this week. A coastal low pressure system may impact the area next weekend.

NEAR TERM /THROUGH TONIGHT/
No changes are needed for the noon update. The forecast is on track.

Today: The cold front is now well offshore with post-frontal cold air advection (CAA) in progress. The degree of CAA will wane through the day. It will be a chilly day despite near full insolation with highs generally peaking in the mid-upper 50s.

Tonight: The center of high pressure is expected to remain over the southern Appalachians. There should be enough pressure gradient to support a NE winds between 3-5 mph through the night. Otherwise, conditions will be favorable for radiational cooling, clear sky with a very dry environment. Using a blend of MOS, low temperatures are forecast to range from the upper 20 inland to the upper 30s along the coast.

SHORT TERM /TUESDAY THROUGH THURSDAY/
Cool and dry high pressure will expand across the area from the northwest. Mostly sunny skies expected Tuesday, then extensive high cirrus will overspread the area Tuesday night and continue through Thursday. Downslope flow will help push highs into the mid/upper 50s Tuesday and lower 60s Wednesday. We'll lose the downslope component on Thursday as a reinforcing cold front drops through from the north, so Thursday will mainly be in the mid 50s.

LONG TERM /THURSDAY NIGHT THROUGH MONDAY/
The forecast remains fairly uncertain late week into next weekend due to model differences regarding a possible coastal low. We stuck pretty close to the NBM for PoPs brings slight chance showers Saturday and chance showers Sunday into Monday.

AVIATION /18Z MONDAY THROUGH SATURDAY/
11/18z TAF discussion: KCHS/KJZI/KSAV: VFR through 12/18z.

Extended Aviation Outlook: VFR.

MARINE
Today: Conditions will gradually improve over the coastal waters this afternoon. All Small Craft Advisories will be allowed to expire at noon.

Tonight: Winds are forecast to veer from the NE this evening, remaining tonight between 10-15 kts. Seas are forecast to range between 3-5 ft tonight.

Tuesday through Friday: Tuesday will feature moderate NE winds as high pressure continues to expand north of the region. The gradient will tighten late Tuesday night into Wednesday as an inverted trough develops well offshore. Seas will also continue to steadily build due to the persistent flow and long fetch.
Small Craft Advisories will likely be needed beginning as early as late Tuesday night for all waters outside Charleston Harbor.
We may actually need Gale headlines at some point Wednesday night into Thursday due to frequent 35 kt gusts. Otherwise, SCA conditions will continue all the way into next weekend as strong high pressure remains north of the waters.

EQUIPMENT
KCLX remains operational, but level 2 data is not being distributed to external users due to an internal hardware failure. We are still awaiting the arrival of new parts to resolve this problem. Until then, level 2 data will not be available. Radar data is available for all connected AWIPS users. Level 3 data is also available for some external users.

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

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Charleston
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Mon -- 12:02 AM EST     0.20 feet Low Tide
Mon -- 05:52 AM EST     Moonrise
Mon -- 06:27 AM EST     5.92 feet High Tide
Mon -- 07:11 AM EST     Sunrise
Mon -- 12:49 PM EST     0.37 feet Low Tide
Mon -- 04:00 PM EST     Moonset
Mon -- 05:13 PM EST     Sunset
Mon -- 06:33 PM EST     4.81 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Charleston, South Carolina, Tide feet

Charleston Harbor Entrance
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Mon -- 12:33 AM EST     0.00 knots Slack
Mon -- 03:14 AM EST     1.71 knots Max Flood
Mon -- 05:51 AM EST     Moonrise
Mon -- 07:05 AM EST     -0.00 knots Slack
Mon -- 07:11 AM EST     Sunrise
Mon -- 10:19 AM EST     -2.53 knots Max Ebb
Mon -- 01:23 PM EST     0.00 knots Slack
Mon -- 03:34 PM EST     1.53 knots Max Flood
Mon -- 04:00 PM EST     Moonset
Mon -- 05:13 PM EST     Sunset
Mon -- 06:54 PM EST     -0.00 knots Slack
Mon -- 10:16 PM EST     -2.16 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION

Charleston Harbor Entrance, South Carolina Current, knots

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Charleston, SC,