Marine Weather and Tide Forecast for Sullivan's Island, SC
March 29, 2024 3:01 AM EDT (07:01 UTC) Change Location
Sunrise 7:09 AM Sunset 7:39 PM Moonrise 11:04 PM Moonset 8:20 AM |
AMZ330 Charleston Harbor- 1249 Am Edt Fri Mar 29 2024
Rest of tonight - N winds 5 to 10 kt, increasing to 10 to 15 kt late.
Fri - N winds 5 to 10 kt, becoming W in the afternoon.
Fri night - SW winds 10 kt.
Sat - SW winds 10 to 15 kt.
Sat night - SW winds 10 to 15 kt.
Sun - SW winds 10 to 15 kt.
Sun night - SW winds 10 to 15 kt.
Mon - SW winds 10 to 15 kt.
Mon night - SW winds 15 kt.
Tue - SW winds 10 to 15 kt.
Tue night - SW winds 15 to 20 kt. Waves 1 to 2 ft. A chance of showers with a slight chance of tstms.
winds and waves higher in and near tstms.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 62 degrees.
winds and waves higher in and near tstms.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 62 degrees.
AMZ300 1249 Am Edt Fri Mar 29 2024
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia - High pressure will extend into the area through Tuesday. A cold front could affect the area next Wednesday.
Area Discussion for - Charleston, SC
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FXUS62 KCHS 290501 AFDCHS
Area Forecast Discussion National Weather Service Charleston SC 101 AM EDT Fri Mar 29 2024
SYNOPSIS
High pressure will extend into the area through Tuesday. A cold front could affect the area next Wednesday.
NEAR TERM /THROUGH TODAY/
A notable dew point front will pass through the area overnight, as strong high pressure builds in from the west. Prior to the passage of that boundary, some ground fog is evident. But this will be short lasting and not enough to include in the forecast.
Even though there will be some mixing that occurs given geostrophic winds at 1000 mb near 15 or 20 kt, there is enough radiational cooling to drop lows to 40-45F far inland, 46 to 50F closer to the coast.
SHORT TERM /TONIGHT THROUGH SUNDAY/
Friday through Sunday: Overall, very tranquil conditions will prevail across the forecast area through the weekend. Aloft, broad ridging will gradually build across the eastern half of the CONUS. High pressure will shift across the region on Friday and then settle in across the western Atlantic for the weekend.
Skies should be clear for much of the weekend, with just a few periods of thin cirrus. The main forecast issue will be temperatures. Highs will be coolest on Friday, with temperatures topping out right around 70 which would be a few degrees below normal. Low-level thickness values then surge each day Saturday and Sunday. The result will be highs in the mid to upper 70s on Saturday followed by low 80s for Sunday. Each afternoon this weekend should also bring a nice progressive sea breeze as the temperature difference increases between land areas and the still relatively cooler shelf waters.
LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/
Quiet conditions will continue into early next week before the next chance of rain comes by the middle of the week. Ridging aloft, high pressure at the surface, and warm temperatures will continue through Tuesday. A cold front is then expected to approach the forecast area from the west Tuesday night and is currently progged to push offshore sometime Wednesday evening or Wednesday night. The front looks quite progressive and should bring a quick shot of showers and possibly isolated thunderstorms. Model guidance suggests there will be plenty of deep layer shear, though not terribly impressive instability.
So, it is possible there could be at least a low end severe threat on Wednesday. Temperatures will cool back to near normal behind the front for Thursday.
AVIATION /06Z FRIDAY THROUGH TUESDAY/
VFR at KCHS, KJZI< and KSAV through 06Z Saturday.
Extended Aviation Outlook: VFR conditions will prevail.
MARINE
Overnight: There will be a surge of northerly winds developing as strong high pressure builds in from the west. Constant isallobaric pressure rises, a tight gradient, and decent mixing of 20-25 kt of 1000 mb geostrophic winds will result in higher winds returning to the marine area. It'll be close to advisory conditions on the waters south of Edisto Beach, but latest indications are that it will fall just shy. Thus our only Small Craft Advisory remains in effect for the outer Georgia waters for some 6 foot seas and gusts around 25 kt late.
Friday through Tuesday: A Small Craft Advisory will continue for the outer Georgia waters into early Friday afternoon due to lingering 6 ft seas. Otherwise, winds will turn southwesterly later in the day on Friday and will remain that way through the weekend and into early next week. Winds will mostly be in the 10-15 knot range, but could surge modestly higher at times as the sea breeze develops each afternoon. Also, the gradient between the offshore high and an inland surface trough will support stronger winds at times. A period of more uniformly stronger flow will be possible later on Tuesday as a cold front draws closer and the pressure gradient tightens. Its possible that marginal Small Craft Advisory conditions could occur in the Charleston County waters for periods of time over the weekend, and then again by Tuesday.
CHS WATCHES/WARNINGS/ADVISORIES
GA...None.
SC...None.
MARINE...Small Craft Advisory until 2 PM EDT this afternoon for AMZ374.
Area Forecast Discussion National Weather Service Charleston SC 101 AM EDT Fri Mar 29 2024
SYNOPSIS
High pressure will extend into the area through Tuesday. A cold front could affect the area next Wednesday.
NEAR TERM /THROUGH TODAY/
A notable dew point front will pass through the area overnight, as strong high pressure builds in from the west. Prior to the passage of that boundary, some ground fog is evident. But this will be short lasting and not enough to include in the forecast.
Even though there will be some mixing that occurs given geostrophic winds at 1000 mb near 15 or 20 kt, there is enough radiational cooling to drop lows to 40-45F far inland, 46 to 50F closer to the coast.
SHORT TERM /TONIGHT THROUGH SUNDAY/
Friday through Sunday: Overall, very tranquil conditions will prevail across the forecast area through the weekend. Aloft, broad ridging will gradually build across the eastern half of the CONUS. High pressure will shift across the region on Friday and then settle in across the western Atlantic for the weekend.
Skies should be clear for much of the weekend, with just a few periods of thin cirrus. The main forecast issue will be temperatures. Highs will be coolest on Friday, with temperatures topping out right around 70 which would be a few degrees below normal. Low-level thickness values then surge each day Saturday and Sunday. The result will be highs in the mid to upper 70s on Saturday followed by low 80s for Sunday. Each afternoon this weekend should also bring a nice progressive sea breeze as the temperature difference increases between land areas and the still relatively cooler shelf waters.
LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/
Quiet conditions will continue into early next week before the next chance of rain comes by the middle of the week. Ridging aloft, high pressure at the surface, and warm temperatures will continue through Tuesday. A cold front is then expected to approach the forecast area from the west Tuesday night and is currently progged to push offshore sometime Wednesday evening or Wednesday night. The front looks quite progressive and should bring a quick shot of showers and possibly isolated thunderstorms. Model guidance suggests there will be plenty of deep layer shear, though not terribly impressive instability.
So, it is possible there could be at least a low end severe threat on Wednesday. Temperatures will cool back to near normal behind the front for Thursday.
AVIATION /06Z FRIDAY THROUGH TUESDAY/
VFR at KCHS, KJZI< and KSAV through 06Z Saturday.
Extended Aviation Outlook: VFR conditions will prevail.
MARINE
Overnight: There will be a surge of northerly winds developing as strong high pressure builds in from the west. Constant isallobaric pressure rises, a tight gradient, and decent mixing of 20-25 kt of 1000 mb geostrophic winds will result in higher winds returning to the marine area. It'll be close to advisory conditions on the waters south of Edisto Beach, but latest indications are that it will fall just shy. Thus our only Small Craft Advisory remains in effect for the outer Georgia waters for some 6 foot seas and gusts around 25 kt late.
Friday through Tuesday: A Small Craft Advisory will continue for the outer Georgia waters into early Friday afternoon due to lingering 6 ft seas. Otherwise, winds will turn southwesterly later in the day on Friday and will remain that way through the weekend and into early next week. Winds will mostly be in the 10-15 knot range, but could surge modestly higher at times as the sea breeze develops each afternoon. Also, the gradient between the offshore high and an inland surface trough will support stronger winds at times. A period of more uniformly stronger flow will be possible later on Tuesday as a cold front draws closer and the pressure gradient tightens. Its possible that marginal Small Craft Advisory conditions could occur in the Charleston County waters for periods of time over the weekend, and then again by Tuesday.
CHS WATCHES/WARNINGS/ADVISORIES
GA...None.
SC...None.
MARINE...Small Craft Advisory until 2 PM EDT this afternoon for AMZ374.
Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | inHg | DewPt |
CHTS1 | 1 mi | 43 min | NNW 5.1G | 56°F | 62°F | 30.10 | ||
41029 - Capers Nearshore (CAP 2) | 15 mi | 53 min | N 3.9G | 58°F | 30.07 | 55°F | ||
41065 | 16 mi | 99 min | 2 ft | |||||
41076 | 21 mi | 59 min | 3 ft | |||||
ACXS1 - ACE Basin Reserve, SC | 32 mi | 76 min | 0 | 53°F | 30.12 | 53°F | ||
41067 | 43 mi | 61 min | 61°F | 1 ft | ||||
41004 - EDISTO - 41 NM Southeast of Charleston, SC | 47 mi | 21 min | N 9.7G | 59°F | 66°F | 30.09 | 54°F |
toggle option: (graph/table)
Airport Reports
EDIT (hide/show)  Help Click EDIT to display multiple airports. Follow links for more data.Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Temp | DewPt | RH | inHg |
KJZI CHARLESTON EXECUTIVE,SC | 7 sm | 26 min | calm | 9 sm | Clear | 50°F | 50°F | 100% | 30.09 | |
KCHS CHARLESTON AFB/INTL,SC | 11 sm | 65 min | NW 04 | 6 sm | Clear | Mist | 48°F | 46°F | 93% | 30.09 |
KLRO MT PLEASANT RGNLFAISON FIELD,SC | 11 sm | 26 min | calm | 5 sm | Clear | Mist | 50°F | 50°F | 100% | 30.09 |
Tide / Current data from XTide NOT FOR NAVIGATION
Fort Johnson, South Carolina, Tide feet
Charleston Harbor Entrance
Click for Map
Fri -- 02:56 AM EDT -2.21 knots Max Ebb
Fri -- 06:00 AM EDT 0.00 knots Slack
Fri -- 07:10 AM EDT Sunrise
Fri -- 08:29 AM EDT 1.52 knots Max Flood
Fri -- 09:20 AM EDT Moonset
Fri -- 11:29 AM EDT -0.00 knots Slack
Fri -- 02:41 PM EDT -1.85 knots Max Ebb
Fri -- 05:41 PM EDT 0.00 knots Slack
Fri -- 07:37 PM EDT Sunset
Fri -- 08:44 PM EDT 1.52 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 02:56 AM EDT -2.21 knots Max Ebb
Fri -- 06:00 AM EDT 0.00 knots Slack
Fri -- 07:10 AM EDT Sunrise
Fri -- 08:29 AM EDT 1.52 knots Max Flood
Fri -- 09:20 AM EDT Moonset
Fri -- 11:29 AM EDT -0.00 knots Slack
Fri -- 02:41 PM EDT -1.85 knots Max Ebb
Fri -- 05:41 PM EDT 0.00 knots Slack
Fri -- 07:37 PM EDT Sunset
Fri -- 08:44 PM EDT 1.52 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Charleston Harbor Entrance, South Carolina Current, knots
12 am |
-0.3 |
1 am |
-1.3 |
2 am |
-2 |
3 am |
-2.2 |
4 am |
-1.9 |
5 am |
-1 |
6 am |
-0 |
7 am |
0.9 |
8 am |
1.4 |
9 am |
1.4 |
10 am |
0.9 |
11 am |
0.3 |
12 pm |
-0.4 |
1 pm |
-1.2 |
2 pm |
-1.7 |
3 pm |
-1.8 |
4 pm |
-1.4 |
5 pm |
-0.6 |
6 pm |
0.3 |
7 pm |
0.9 |
8 pm |
1.4 |
9 pm |
1.5 |
10 pm |
1.2 |
11 pm |
0.7 |
Charleston, SC,
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