North Charleston, SC Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for North Charleston, SC

March 4, 2024 3:05 AM EST (08:05 UTC) Change Location
Sunrise 6:41 AM   Sunset 6:21 PM
Moonrise 2:15 AM   Moonset 11:55 AM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

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Marine Forecasts
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AMZ330 Charleston Harbor- 1205 Am Est Mon Mar 4 2024

Rest of tonight - N winds 5 kt. Patchy fog, then areas of fog late. Fog could be locally dense with vsby 1 nm or less.

Mon - NE winds 5 to 10 kt. Areas of fog in the morning. The fog could be locally dense with vsby 1 nm or less.

Mon night - NE winds 5 to 10 kt.

Tue - NE winds 5 to 10 kt.

Tue night - E winds 10 kt, becoming se after midnight. A chance of showers in the evening, then showers likely with a slight chance of tstms after midnight.

Wed - S winds 15 kt with gusts to 20 kt. Showers with a chance of tstms in the morning, then a chance of showers with a slight chance of tstms in the afternoon.

Wed night - SW winds 10 to 15 kt, becoming W after midnight. A slight chance of showers in the evening.

Thu - N winds 10 kt.

Thu night - E winds 5 to 10 kt.

Fri - E winds 10 kt. A slight chance of showers.

Fri night - SE winds 10 to 15 kt. A chance of showers.
winds and waves higher in and near tstms.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 57 degrees.

AMZ300 1205 Am Est Mon Mar 4 2024

Synopsis for the coastal waters of south coastal south carolina and north coastal georgia - Weak low pressure will develop off the coast tonight. High pressure will briefly build in for Monday, before a storm system impacts the region Tuesday night into Wednesday. High pressure will return for Thursday and Friday. The next storm system is expected to arrive early in the weekend.


7 Day Forecast for Marine Location Near North Charleston, SC
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Area Discussion for - Charleston, SC
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FXUS62 KCHS 040541 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 1241 AM EST Mon Mar 4 2024

SYNOPSIS
Weak low pressure will develop off the coast tonight. High pressure will briefly build in for Monday, before a storm system impacts the region Tuesday night into Wednesday. High pressure will return for Thursday and Friday. The next storm system is expected to arrive early in the weekend.

NEAR TERM /UNTIL 6 AM THIS MORNING/
The main concern early this morning centers on the fog/stratus potential. The low-level wedge will become reinforced overnight as low pressure passes well offshore. A combination of stratus build-down and radiation fog appears likely, but it remains a bit more uncertain how widespread any dense fog can become through daybreak. Incoming near term model data has backed off a bit on the coverage of significant fog by several hours, possibly because low stratus may not form until late, thus delaying the build-down process until just before sunrise.
Still, healthy bit of radiation fog is likely with calm winds and nearly saturated low-level conditions in place. The combination of these two processes could still support dense fog. 1000 hPa condensation pressure deficits suggest areas south of I-16 and east I-95 could have better chances for dense fog, likely a bit later than what was observed Sunday morning.

Webcams out of McIntosh County suggest dense fog is already pretty well established with vsbys 1/4 mile or less noted. A Dense Fog Advisory has been posted here as well as Long County through 9 AM Monday. Depending on how the fog evolves overnight, the Dense Fog Advisory could be expanded north to include other parts of Southeast South Carolina and Southeast Georgia.

SHORT TERM /6 AM THIS MORNING THROUGH WEDNESDAY/
High pressure will be situated inland Monday, while a weak upper wave and associated surface reflection lifts northward from off the SC coast. High pressure will continue into Tuesday with a coastal trough/front lingering offshore. There's not really much in the way of forcing, so PoPs are limited to less than 20% for much of this timeframe. There will be some rain chances returning late Tuesday afternoon ahead of the next system. High temperatures both days should peak in the low to mid 70s away from the immediate coast. Overnight lows Monday night will be in the low to mid 50s. There are signals that another round of fog will develop late Monday night into Tuesday morning. Currently, best conditions look over southeast Georgia, which is where patchy fog has been introduced.

The most active weather of the stretch will arrive Tuesday night into Wednesday. Mid level shortwave will help induce surface low pressure near the Gulf coast states, which is expected to pass across Georgia and the Carolinas and eventually drag a cold front through the local area. Rain should move in from the southwest late Tuesday evening then spread into South Carolina during the latter half of the night. Latest guidance indicates the bulk of the activity should be exiting the area by early Wednesday afternoon. Rain totals through this event look to average 1-1.50 inches. Should be progressive enough to prevent any flooding issues. Highs are forecast to span the 70s.
Bulk shear peaks 30-40 knots, but instability progs are rather weak which should limit the severe threat.

LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/
Surface high pressure and weak mid level ridging will return for Thursday and much of Friday. While still some differences in strength and timing, the next trough and associated surface system will arrive over the weekend. This will bring increasing rain chances, but due to some differences between model solutions, opted to keep rain chances in the likely category 60-70%. High pressure should return for early next week in wake of the departing low and cold front.

AVIATION /06Z MONDAY THROUGH FRIDAY/
04/06z TAF Discussion: The fog/stratus forecast for KCHS, KJZI and KSAV overnight is proving to be increasing difficult. A combination of radiation fog and stratus build-down will likely lead to some degree of vsby reductions through daybreak, but the latest near term guidance has delayed the onset of fog/stratus by several hours.
KSAV and possibly KJZI have the best chances for seeing dense fog with both vsbys and cigs approaching, if not breaching, airfield minimums. Webcams out of both sites already show some degree of shallow ground fog forming, so deteriorating conditions appear on track, although maybe a bit slower than what the 00z TAFs depicted. The best chances for conditions below airfield minimums will be 08-14z at KSAV and 09-13z at KJZI. For KCHS, conditions are expected to largely remain above minimums, but should drop below alternate minimums as early as 08z, but more likely 10-13z. Conditions will improve at all sites by mid-morning with VFR prevailing.

Extended Aviation Outlook: Nighttime fog and/or low stratus possible Monday night through Tuesday. Additional flight restrictions are possible with showers and thunderstorms late Tuesday into Wednesday.

MARINE
Near term guidance and webcams out of Saint Simons suggest low vsbys below 1NM have extended far north as Sapelo Sound. A Marine Dense Fog Advisory has been posted from Savannah to Altamaha Sound out 20 NM to account for this. The advisory may need to be expanded to include additional marine zones overnight.

Tonight: The marine area has a good chance of experiencing dense fog again tonight. Although there could be some higher winds than last night, associated with weak low pressure forming well offshore and shifting north toward the North Carolina Outer Banks late. These winds, less coverage of low clouds over the marine area than last evening, and most guidance indicating there should already be fog over the Atlantic (which there isn't), creates a bit of a challenge regarding the fog potential. But as winds back more northerly, there should be fog and stratus from over land areas moving offshore and getting trapped beneath the marine layer. Current satellite imagery shows that dense fog is ongoing south of the mouth of the Altamaha River and for now it is not beginning to expand northward. Across the local waters low stratus is increasing in coverage and should start to build down through the early morning hours. We continue to think dense fog will develop, it just might take longer than it did last night.

Monday through Friday: High pressure will reside inland while a coastal trough/front lingers to the east early in the week.
Northeast flow will largely prevail remaining 15 knots or less.
Low pressure is then expected to pass across the region Tuesday night into Wednesday. While winds/wind gusts look to be held under 25 knots, seas building to 6 feet could result in a Small Craft Advisory for portions of the waters, especially the Charleston county and outer Georgia waters. Improving conditions expected for Thursday and Friday with no additional concerns at this time.

CHS WATCHES/WARNINGS/ADVISORIES
GA...Dense Fog Advisory until 9 AM EST this morning for GAZ137-140- 141.
SC...None.
MARINE...Dense Fog Advisory until 9 AM EST this morning for AMZ354.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
CHTS1 8 mi48 min N 6G7 60°F 57°F30.14
41029 - Capers Nearshore (CAP 2) 23 mi118 min N 5.8G7.8 58°F 30.1258°F
41065 23 mi104 min 3 ft
ACXS1 - ACE Basin Reserve, SC 29 mi81 min 0 56°F 30.1856°F
41076 30 mi124 min 4 ft
41033 44 mi118 min NNW 3.9G5.8 60°F 30.1655°F
41067 44 mi71 min 59°F


Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KCHS CHARLESTON AFB/INTL,SC 3 sm9 minNNE 037 smPartly Cloudy Patches Fog 57°F55°F94%30.13
KJZI CHARLESTON EXECUTIVE,SC 11 sm10 minN 0410 smA Few Clouds59°F59°F100%30.13
KLRO MT PLEASANT RGNLFAISON FIELD,SC 15 sm10 mincalm5 sm-- Mist 59°F59°F100%30.12
KDYB SUMMERVILLE,SC 19 sm10 mincalm1/2 smMostly Cloudy Mist 57°F57°F100%30.12
KMKS BERKELEY COUNTY,SC 23 sm10 mincalm4 smPartly Cloudy Mist 55°F55°F100%30.13
Link to 5 minute data for KCHS


Wind History from CHS
(wind in knots)
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Tide / Current for Drayton, Bee's Ferry, Ashley River, South Carolina
   
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Drayton
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Mon -- 02:15 AM EST     Moonrise
Mon -- 02:32 AM EST     5.44 feet High Tide
Mon -- 06:43 AM EST     Sunrise
Mon -- 09:06 AM EST     1.02 feet Low Tide
Mon -- 11:55 AM EST     Moonset
Mon -- 02:44 PM EST     4.48 feet High Tide
Mon -- 06:20 PM EST     Sunset
Mon -- 09:07 PM EST     0.56 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Drayton, Bee's Ferry, Ashley River, South Carolina, Tide feet
12
am
4.1
1
am
4.9
2
am
5.4
3
am
5.4
4
am
4.9
5
am
4.1
6
am
3
7
am
2.1
8
am
1.3
9
am
1
10
am
1.2
11
am
2
12
pm
3
1
pm
3.9
2
pm
4.4
3
pm
4.5
4
pm
4.1
5
pm
3.4
6
pm
2.4
7
pm
1.5
8
pm
0.9
9
pm
0.6
10
pm
0.8
11
pm
1.6



Tide / Current for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
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Mon -- 02:14 AM EST     Moonrise
Mon -- 02:27 AM EST     -0.00 knots Slack
Mon -- 05:59 AM EST     -1.75 knots Max Ebb
Mon -- 06:42 AM EST     Sunrise
Mon -- 09:05 AM EST     0.00 knots Slack
Mon -- 11:19 AM EST     1.15 knots Max Flood
Mon -- 11:54 AM EST     Moonset
Mon -- 02:04 PM EST     -0.00 knots Slack
Mon -- 05:41 PM EST     -1.50 knots Max Ebb
Mon -- 06:19 PM EST     Sunset
Mon -- 08:53 PM EST     0.00 knots Slack
Mon -- 11:48 PM EST     1.34 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Charleston Harbor Entrance, South Carolina Current, knots
12
am
1
1
am
0.6
2
am
0.2
3
am
-0.3
4
am
-1
5
am
-1.6
6
am
-1.7
7
am
-1.5
8
am
-0.8
9
am
-0.1
10
am
0.6
11
am
1.1
12
pm
1
1
pm
0.5
2
pm
0
3
pm
-0.5
4
pm
-1
5
pm
-1.4
6
pm
-1.5
7
pm
-1.2
8
pm
-0.6
9
pm
0.1
10
pm
0.7
11
pm
1.2




Weather Map
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GEOS Local Image of southeast   
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Charleston, SC,



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