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Marine Weather and Tides Charleston, SC Version 3.4

NOTICE 8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it. 8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue. 12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed. 10/9/2019 Updated the Marine Zones. 9/4/2019 Fixed the weather maps due to NOAA moving them. 7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

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Sunrise 7:20AM

Sunset 5:39PM

Sunday January 17, 2021 4:23 AM EST (09:23 UTC)

Moonrise 10:30AM

Moonset 10:14PM

Illumination 16%

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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7 Day Forecast for Marine Location Near Charleston, SC

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Area Discussion for - Charleston, SC

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FXUS62 KCHS 170848 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 348 AM EST Sun Jan 17 2021

SYNOPSIS. High pressure will prevail through much of next week. A weak cold front is expected to pass over the region Friday.

NEAR TERM /THROUGH TONIGHT/. Today: Aloft, southwest flow will prevail ahead of a vigorous shortwave diving out of the Upper Midwest and into the Ohio Valley. At the surface, the forecast area will remain within the larger circulation around a deep area of low pressure centered across eastern Canada with weak high pressure over the Southern Plains and the western Gulf of Mexico. The main forecast issue today will be cloud cover as cirrus increases in density under the influence of a 300mb jet that strengthens to 150+ knots late in the day. The morning will be mostly clear but cirrus will quickly fill in from the southwest through the afternoon. Low level thickness scheme would support temperatures right around 50, but with some weak warm advection we should outperform that a bit. Forecast highs are in the low 50s in most areas, with some mid 50s possible along and south of I-16. West-southwest winds will be elevated today but certainly nothing like Saturday. Gusts to around 20 mph will be possible.

Tonight: The shortwave trough axis will approach the area in the evening, then pass through late in the overnight. Cirrus will peak in the evening and then decrease in coverage through the early morning hours. We will then see an area of increased mid- level clouds pass through late, associated with the trough aloft and a passing weak surface trough/front. We should maintain enough pressure gradient to support weak southwesterly flow, likely preventing temperatures from getting too cold. Forecast lows range from the low 30s inland to the low 40s at the coast.

SHORT TERM /MONDAY THROUGH WEDNESDAY/. Monday through Wednesday: Broad surface high pressure will gradually build/deepen over the Southeast throughout the period. Meanwhile, a deep upper trough will lift as it shifts off the Northeast coast Monday evening. Deeper moisture associated with the trough should remain well to our north. Otherwise, with high pressure and subsidence controlling the region, rain-free conditions are expected through the period. A warming trend is anticipated through Wednesday with max temps increasing by a few degrees each day. Initially highs will be in the mid 50s Monday, increasing to the low/mid 60s by Wednesday. Min temps will generally range in the 30s over the forecast area Monday night, and the upper 30s Tuesday night.

LONG TERM /WEDNESDAY NIGHT THROUGH SATURDAY/. Surface high pressure will begin to weaken Thursday as broad low pressure tracks over Great Lakes region and into the Northeast US. Gradual coupling of the polar and subtropical jet will produce a zonal jet streak over the Ohio Valley/Mid Atlantic states. Upper divergence in the right entrance region of the jet will spawn a surface low over TX that will propagate eastward toward the Carolinas. A weak, slow-moving cold front associated with the low approaches the region from the west Friday. Showers ahead/along the front are possible Friday/Saturday. Thereafter, high pressure is expected to build in the wake of the front. Slightly above normal temps will persist Thursday and Friday with highs in the 60s, whereas Saturday temps should return to near normal with the passage of the front.

AVIATION /08Z SUNDAY THROUGH THURSDAY/. VFR conditions will prevail at KCHS and KSAV through 06z Monday.

Extended Aviation Outlook: VFR expected to prevail.

MARINE. Today and tonight: West-southwest winds will prevail today, with most of the local waters topping out around 15 knots. The strongest winds will be in the Charleston County waters where up to 15-20 knots will be possible in the afternoon. Charleston Harbor should also see frequent gusts around 20 knots this afternoon. Overnight, the gradient will tighten modestly and winds will turn more westerly. Wind speeds will increase into the 15-20 knot range for all zones, and we could even see gusts to 25 knots in the Charleston County waters and the outer Georgia waters. A Small Craft Advisory has not been issued for these areas as of yet, but could be needed later today. Seas will average 1-3 feet today, then increase tonight to up to 4 feet in the nearshore waters and up to 5 feet in the outer waters.

Monday through Friday: High pressure will spread into the region from the west. Elevated westerly winds will continue through Monday. Small Craft Advisories could be needed for portions of the waters due to frequent 25 kt gusts. Seas will range from 2-4 ft with some possible 5 footers in the outer GA waters Monday. Thereafter, benign conditions anticipated (1-2 ft seas and W/SW winds less than 15 kt) until Friday when another WSW wind surge is anticipated.

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



NEAR TERM . BSH SHORT TERM . BRM LONG TERM . BRM AVIATION . BSH/BRM MARINE . BSH/BRM

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
CHTS1	0 mi	53 min	WSW 4.1 G 6	38°F	53°F		1015.3 hPa
FBIS1 - Folly Island, SC	7 mi	23 min	WSW 4.1 G 5.1	37°F			1015.5 hPa (-0.4)
ACXS1 - ACE Basin Reserve, SC	32 mi	98 min	Calm	33°F			1016 hPa	30°F
41033	43 mi	75 min	NW 9.7 G 14	44°F	54°F		1015.8 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC	48 mi	33 min	W 14 G 18	48°F	67°F		1015.4 hPa	33°F

Wind History for Charleston, SC

(wind in knots)    EDIT      (on/off)   Help

5 AM

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Last 24hr

W6 G9

W6 G9

W6 G10

W7 G10

W7 G12

SW9 G13

W10 G19

SW11 G17

SW11 G25

W13 G25

W16 G26

W12 G24

W13 G22

W9 G17

W7 G11

W5 G8

W6 G10

SW5

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W4 G7

W4 G8

W5 G8

SW3

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1 day ago

SW3

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S3

S5 G10

S11 G14

SW11 G15

SW14 G23

S13 G20

SW7 G14

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W3 G6

W4 G9

W5 G8

SW3 G7

SW3 G6

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SW3 G7

W5 G8

W7 G10

W3

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W6 G10

2 days ago

W8 G12

W8 G11

W6 G10

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W8 G14

W7 G10

W6 G9

W7 G10

W7 G11

W8 G11

SW7 G12

SW4 G8

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SW5 G8

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SW4 G7

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SW4

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SW4

S5 G8

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Charleston Executive Airport, SC	7 mi	28 min	N 0	10.00 mi	Fair	32°F	28°F	87%	1015.2 hPa
Charleston, Charleston Air Force Base, SC	10 mi	27 min	WSW 4	10.00 mi	Fair	33°F	26°F	75%	1014.7 hPa
Mount Pleasant Regional-Faison Field, SC	11 mi	28 min	N 0	10.00 mi	Fair	36°F	28°F	75%	1014.9 hPa

Link to 5 minute data for KJZI

Wind History from JZI (wind in knots)

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Last 24hr

W5

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W12 G18

W14

SW16 G22

SW16 G27

SW12 G20

SW15 G24

W14 G20

W11 G21

W8

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Calm

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Calm

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Calm

1 day ago

SW4

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S11

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S13 G19

S12 G22

S14 G19

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Calm

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2 days ago

W5

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W7 G13

W11

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W9

5 G11

SW5

Calm

S4

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Calm

SW4

SW3

Calm

Calm

W4

S3

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Tide / Current Tables for Charleston, South Carolina

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Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current

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Weather Map

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GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East

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Ground Weather Radar Station

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