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Marine Weather and Tides Charleston, SC Version 3.4

NOTICE 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 6:19AM

Sunset 8:31PM

Sunday July 12, 2020 6:15 AM EDT (10:15 UTC)

Moonrise 12:00AM

Moonset 12:15PM

Illumination 56%

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 120807 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 407 AM EDT Sun Jul 12 2020

SYNOPSIS. A weak stationary front will linger over or near our area through early next week. High pressure is expected to return during the middle of next week and persist through late next week.

NEAR TERM /THROUGH TONIGHT/. Mid and upper level troughing will persist across the area through tonight. A weak upper level disturbance and an associated increase in mid and upper level moisture will approach the area late tonight. In advance of this feature drying in the mid to lower portions of the atmosphere will prevail today and this combined with good mixing will enable surface dewpoints to mix out in areas away from the coast ahead of the sea breeze with afternoon dewpoint temperatures in the 60s common in these areas. So despite high temperatures in the mid to upper 90s away from the coast, lower dewpoints will keep afternoon peak heat indices in the 98 to 104 degree range. There could be a few showers and thunderstorms along and near the sea breeze across mainly the Charleston Tri-County area this afternoon into this evening where the best low level convergence will exist. Further south, cannot rule out a stray shower or thunderstorm, but believe capping and weaker convergence should preclude convective development. Any leftover convection should die off quickly this evening and feel fairly confident that upstream convection across the central and southern Appalachians will not make it to our area tonight. Lows tonight will once again range from the lower to mid 70s inland to near 80 at the coast.

SHORT TERM /MONDAY THROUGH WEDNESDAY/. Monday: The base of a mid/upper lvl trough of low pressure will gradually swing across the Mid-Atlantic and Southeast states, helping push a weak cold front into the area late in the day. Ahead of the front, moisture characterized by PWATs between 1.5-2.0 inches will advect across the region, helping support few to scattered showers/thunderstorms during peak heating hours. H5 shortwave energy aloft could maintain shower/thunderstorm activity through late evening hours, before the bulk of precip shifts offshore after midnight. Temps should remain warm given the late arrival of precip, peaking in the low/mid 90s away from the immediate beaches. Overnight lows will also remain mild, only dipping into the mid/upper 70s.

Tuesday: The axis of a mid/upper lvl trough of low pressure will be offshore while a ridge of high pressure begins to build across the Southeast United States from the west. Although precip coverage is anticipated to be less than the previous day, any lingering moisture near a stationary front/boundary could lead to few/scattered showers and thunderstorms during peak heating hours. Temps will be warm once again, peaking in the low/mid 90s for most areas. Areas well inland across Southeast Georgia could reach the upper 90s. Any convection that develops during the day will likely dissipate quickly during the evening. Conditions should remain dry overnight with mild temps in the mid/upper 70s.

Wednesday: A mid/upper lvl ridge of high pressure will extend across much of the Deep South and Southeast United States, favoring more of a typical summertime pattern as the area remains between sfc high pressure developing across the western Atlantic and a weak lee trough developing well inland. Few to scattered showers and thunderstorms are possible during peak heating hours, but should quickly diminish during the evening with the loss of daytime heating. Temps will be warm, peaking in the low/mid 90s across most areas. A few locations could peak in the upper 90s well inland.

LONG TERM /WEDNESDAY NIGHT THROUGH SATURDAY/. A mid/upper level ridge of high pressure will extend across the Southeast through much of the week with the bulk of shortwave energy passing north of the area primarily in a zonal flow aloft. A more typical summertime pattern is anticipated with few to scattered showers and thunderstorms possible during the afternoon/evening hours each day into late week. Precip coverage should slightly increase during the weekend as onshore sfc flow persists between high pressure extending across the western Atlantic and lee trough inland. High temps will be a few degrees above normal through the week, generally ranging in low/mid 90s each day (warmest inland), but could be a degree or two cooler late week as the sfc flow becomes more directly onshore. Overnight lows should remain mild, ranging in the mid/upper 70s away from the immediate coast.

AVIATION /07Z SUNDAY THROUGH THURSDAY/. 06Z TAFs: Other than perhaps a period of light fog @ KCHS between 09Z and 13Z, VFR conditions are expected with a wind shift due to the mid to late afternoon sea breeze. There is small risk for convection at or near CHS Sunday afternoon and as a result maintained VCSH from 18Z to 23Z.

Extended Aviation Outlook: Brief flight restrictions are possible at both terminals Monday afternoon/evening due to showers/thunderstorms associated with a nearby front. VFR conditions should then generally prevail at both terminals Tuesday through Thursday, but an afternoon or evening shower/thunderstorm could still result in brief flight restrictions.

MARINE. Widely scattered showers and thunderstorms across mainly the nearshore waters off the Charleston County coast early this morning should move northeast away from the area or dissipate by shortly after sunrise. With a weak low pressure area inland and Atlantic high pressure well east of the area, a generally light southwesterly to southerly flow will prevail today with winds generally at or below 10 kt, except a bit higher closer to the southeast South carolina coast associated with the sea breeze this afternoon. Seas generally expected to be 2 to 3 feet. As the pressure gradient tightens a bit tonight, winds increase into the 10 to 15 knot range and this will help seas increase to 4 feet from 10 to 20 nm of the southeast South Carolina coast and generally 4 to 5 feet across the waters 20-60 nm off the southeast Georgia coast.

Monday through Friday: A weak sfc trough of low pressure could linger near the coastal waters to start off the week, then become reinforced by a weak cold front attempting to reach the coast late Monday into Tuesday. High pressure will then generally prevail mid to late week. Given the pattern, winds/seas are expected to remain below Small Craft Advisory levels through the week. However, south- southwest winds could gust upwards to 15-20 kts at times Monday night. Thereafter, the pressure gradient remains rather week, supporting south-southeast winds no higher than 10-15 kt. Seas will range between 3-5 ft early week, then subside to 2-3 ft during the middle of the week.

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

NEAR TERM . MTE SHORT TERM . DPB LONG TERM . DPB AVIATION . DPB/MTE MARINE . DPB/MTE

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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	45 min	SW 2.9 G 4.1	82°F	85°F		1009.9 hPa
FBIS1 - Folly Island, SC	7 mi	75 min	S 8 G 8	83°F			1009.8 hPa (-1.5)
41029 - Capers Nearshore (CAP 2)	16 mi	127 min	SW 14 G 21	84°F	85°F		1009.9 hPa
ACXS1 - ACE Basin Reserve, SC	32 mi	90 min	Calm	78°F			1010 hPa	78°F
41033	43 mi	67 min	W 5.8 G 7.8	84°F	84°F		1009.1 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC	48 mi	35 min	WSW 9.7 G 12	83°F	84°F		1009.7 hPa	76°F

Wind History for Charleston, SC

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W2 G6

W4 G7

W3 G7

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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	20 min	N 0	5.00 mi	Fog/Mist	79°F	78°F	100%	1010.2 hPa
Charleston, Charleston Air Force Base, SC	10 mi	79 min	SSW 3	9.00 mi	A Few Clouds	80°F	78°F	94%	1009.1 hPa
Mount Pleasant Regional-Faison Field, SC	11 mi	20 min	N 0	5.00 mi	Fog/Mist	79°F	78°F	100%	1009.8 hPa

Link to 5 minute data for KJZI

Wind History from JZI (wind in knots)

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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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Wind Forecast for Charleston, SC (6,6,7,8)

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Ground Weather Radar Station Charleston, SC

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