Friday, August7, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Seabrook Island, 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.

Sunrise 6:36AMSunset 8:13PM Friday August 7, 2020 8:46 AM EDT (12:46 UTC) Moonrise 9:51PMMoonset 9:12AM Illumination 87% Phase: Waning Gibbous; Moon at 18 days in cycle
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.
Marine Forecasts
    EDIT      (on/off)   Help
AMZ330 Charleston Harbor- 634 Am Edt Fri Aug 7 2020
Today..Variable winds 5 kt, becoming S 10 to 15 kt. A chance of showers and tstms.
Tonight..S winds 10 to 15 kt, becoming sw 5 to 10 kt. A chance of showers and tstms.
Sat..S winds 5 to 10 kt. A chance of showers and tstms.
Sat night..S winds 5 to 10 kt. A slight chance of showers and tstms after midnight.
Sun..S winds 5 to 10 kt. A chance of showers and tstms in the afternoon.
Sun night..S winds 5 to 10 kt, becoming sw after midnight. A chance of showers and tstms, mainly in the evening.
Mon..SW winds 5 to 10 kt. A chance of showers and tstms.
Mon night..SW winds 5 to 10 kt. A slight chance of showers and tstms.
Tue..S winds 5 to 10 kt. A chance of showers and tstms.
Tue night..S winds 5 to 10 kt. A slight chance of showers and tstms. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 85 degrees.
AMZ300 634 Am Edt Fri Aug 7 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A weak, stationary front will linger to the west through the weekend before dissipating. The region will then be situated between atlantic high pressure offshore and an inland trough of low pressure.


7 Day Forecast for Marine Location Near Seabrook Island, SC
   Hourly   EDIT   Help
location: 32.6, -80.13     debug


Area Discussion for - Charleston, SC
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS62 KCHS 071048 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 648 AM EDT Fri Aug 7 2020

SYNOPSIS. A weak, stationary front will linger to the west through the weekend before dissipating. The region will then be situated between Atlantic high pressure offshore and an inland trough of low pressure.

NEAR TERM /UNTIL 6 PM THIS EVENING/.

Early Friday morning: Showers/thunderstorm had expanded in coverage along the land breeze boundary along the Charleston County coast and across adjacent coastal waters. Showers/thunderstorms will likely expand inland across the Charleston Tri-County region and will continue to fire and advance NE along the land breeze/outflow boundaries along the coast for the next couple of hours. Adjusted PoPS to account for ongoing/expected trends. Locally heavy rainfall is possible along the immediate coast. Elsewhere, any showers/thunderstorms should remain isolated and limited mainly to the coast for the next few hours.

The ongoing forecast continues to indicate that convection should again spread south/west along the sea breeze/complex outflow boundaries, especially this afternoon, while additional outflow boundaries could contribute to new convection across southern/inland counties later today. While the moist environment depicted by water vapor imagery/featuring PWAT values around 2 inches should support another active day, high resolution models, especially recent HRRR runs, suggest that after the flare up of convection near the SC coast this morning, coverage of subsequent showers/thunderstorms could be reduced as compared with the past couple of days. While confidence in this drier scenario remains low, capped maximum PoPs in the 40-50 percent range this afternoon/early evening.

As has been the case during the past couple of days, typically strong instability and elevated PWAT values could support locally heavy rainfall and brief/pulse damaging wind events.

As usual, hourly and maximum temperatures will remain highly dependent on convection or lack thereof at any given location. For any inland location which manages to remain rain-free, temperatures should easily recover into the middle 90s. Heat index values will exceed 100F across the region, and heat index values exceeding 105F could occur along/east of I-95 where highest dewpoints will reside.

SHORT TERM /6 PM THIS EVENING THROUGH MONDAY/. The focus for scattered showers/thunderstorms should start mainly across inland counties this evening then should shift back toward the coast overnight. Lows will range from the lower/middle 70s inland to the upper 70s/lower 80s close to the coast.

The region will remain pinned between subtropical high pressure well offshore and a pronounced mid-level weakness centered to the west. The combination of weak, hard to time perturbations propagating in from the west and moderate to strong instability will support rounds of scattered to numerous showers/tstms each afternoon and evening through Monday. As is typical for this time of year, the convective pattern will be highly driven by mesoscale boundary interactions for which there is little skill in identifying and placing this far out. Slightly above climatological pops look reasonable through the period with values topping out in the 50-60% range each afternoon. Rain chances will gradually diminish each evening, but some degree of convection will linger each night, especially well inland prior to midnight and along the coast during the early morning hours. Isolated severe tstms will be possible each day with the possibility of wet microbursts and excessive cloud-to-ground lightning. There will also be a risk for locally heavy rainfall capable of producing minor flooding of low-lying and poor drainage areas.

Highs should reach into the lower-mid 90s each afternoon prior to onset of convection. Heat indices will generally remain in check as afternoon convection spreads, but will peak 104-107 along the coast at times as low-level moisture pools along/behind the afternoon sea breeze. Lows will range from the lower-mid 70s inland with lower 80s along the beaches and Downtown Charleston.

LONG TERM /MONDAY NIGHT THROUGH THURSDAY/. The mid-level weakness is forecast to amplify by mid-week, possibly briefly cutting off over central South Carolina and Georgia as weak shortwave ridging develops to its north and a pronounced shortwave passes north over the Ohio Valley and Mid-Atlantic. This should help increase the amount of showers/tstms each afternoon within a ribbon of tropical moisture (PWATS at or above 2.25") with rain chances lingering through the night. Pops 50-60% Tuesday will increase to 60- 70% both Wednesday and Thursday when the weakness/upper low makes its closest approach. Highs are expected to top out in the lower-mid 90s Tuesday, then lower into the upper 80s/lower 90s by mid-week as afternoon heating will be limited by numerous showers/tstms. Isolated strong tstms will be possible and there will be a risk for localized flooding, especially in low-lying and poor drainage areas. Lows will range from the lower-mid 70s inland with upper 70s/lower 80s at the coast and Downtown Charleston, although daily lows could be augmented at times by convective influences.

AVIATION /12Z FRIDAY THROUGH TUESDAY/. Scattered thunderstorms should again develop in the vicinity of the terminals today, this morning into at least early.mid afternoon around KCHS then perhaps in the KSAV vicinity this afternoon/early evening. Limited confidence regarding coverage, timing and specific impacts limits 12z TAFs to a mention VCTS/CBs at both sites. Outside thunderstorms, mainly VFR today into this evening. Occasional MVFR ceilings are possible during the latter part of the 12z TAF period.

Extended Aviation Outlook: Tstm impacts possible each afternoon/evening. There will be a risk for marine-based stratocumulus establishing MVFR cigs each night, mainly at KCHS.

MARINE. Friday morning, the land breeze boundary over nearshore waters will continue to support showers/thunderstorms with isolated/brief waterspouts. Most convection should then shift inland and the threat for waterspouts should end when the sea breeze develops by late morning/midday.

Meanwhile, thunderstorms could produce locally hazardous conditions at any time through tonight. Outside thunderstorms, expect similar conditions as recent days, with S/SW winds to start Friday backing to the S/SE as the sea breeze develops, then veering toward the S/SW again tonight. Capped maximum winds at 15-20 kt. Seas of 2-3 ft should prevail.

Saturday through Tuesday: A typical southerly summer wind regime will hold through the period as Atlantic high pressure holds offshore. Some nocturnal surges are possible over the coastal waters with sea breeze enhancements likely each afternoon near the land/sea interface and Charleston Harbor. Winds will largely remain less than 15 kt with seas 2-4 ft. The formation of land breeze circulations will be possible during early morning hours resulting in a westerly wind around sunrise. This feature could be a focus for waterspouts during mid-late morning hours for the next several days.

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

NEAR TERM . SPR SHORT TERM . LONG TERM . AVIATION . SPR MARINE . SPR


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FBIS1 - Folly Island, SC 14 mi107 min W 1.9 G 1.9 79°F 1018.7 hPa (+1.2)
ACXS1 - ACE Basin Reserve, SC 17 mi62 min Calm 76°F 1019 hPa76°F
CHTS1 17 mi47 min NW 4.1 G 5.1 84°F 85°F1018.9 hPa (+1.5)
41033 27 mi39 min NW 7.8 G 12 81°F 85°F1018.8 hPa
41029 - Capers Nearshore (CAP 2) 30 mi39 min NNW 1.9 G 5.8 80°F 83°F1019 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 55 mi27 min SSW 3.9 G 3.9 83°F 83°F1018.8 hPa76°F

Wind History for Charleston, SC
(wind in knots)    EDIT      (on/off)   Help
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
Last
24hr
S6
S9
S7
G12
S9
S9
G14
S7
G11
SE11
E7
G10
E4
SE13
S6
G12
S10
G13
S9
G12
S8
G13
S9
G12
S6
G9
S5
G8
SW5
G8
SW3
SW3
NW1
N3
W1
NW4
1 day
ago
SE9
SE7
SE6
E11
E9
N9
G16
E3
E13
G16
SE11
SE10
G14
S6
SE6
SE4
SE6
SE7
S6
G11
S6
S11
S7
G11
S6
S3
SW5
SW4
G7
S5
2 days
ago
NW3
G7
NW5
G8
W3
G6
SW3
SE6
G9
S6
S8
G11
SE8
G11
S7
SE8
SE10
SE9
S6
S9
S5
S3
G6
S4
G7
S5
S6
SE9
S2
S5
S4
SE4

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC10 mi52 minN 08.00 miThunderstorm in Vicinity79°F78°F100%1019 hPa
Charleston, Charleston Air Force Base, SC22 mi51 minN 010.00 miA Few Clouds78°F75°F90%1018.6 hPa

Link to 5 minute data for KJZI

Wind History from JZI (wind in knots)
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
Last 24hrSW4
G10
SE6SE8
G14
S8
G13
SE4SE7
G13
SE8SE6
G12
SE3S7S9S8
G13
S8SE5S8S8S7S6CalmCalmW3--CalmCalm
1 day ago6SE56SE7E9N10CalmE11
G16
SE7SE7S5SE3CalmSE5SE5S6S4S7S6S4S5CalmS3S6
2 days agoW4W5W4SW5SE6SE7SE7SE6
G11
SE54SE7SE5S8S4S4CalmS4S3S5----CalmS3SE4

Tide / Current Tables for Kiawah River Bridge, South Carolina
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Kiawah River Bridge
Click for Map
Fri -- 05:17 AM EDT     0.35 feet Low Tide
Fri -- 06:39 AM EDT     Sunrise
Fri -- 10:12 AM EDT     Moonset
Fri -- 11:33 AM EDT     5.45 feet High Tide
Fri -- 05:25 PM EDT     0.65 feet Low Tide
Fri -- 08:12 PM EDT     Sunset
Fri -- 10:50 PM EDT     Moonrise
Fri -- 11:52 PM EDT     5.77 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
5.95.13.82.31.10.40.61.52.73.94.85.45.44.83.72.51.40.70.81.52.844.95.6

Tide / Current Tables for Charleston Harbor, off Fort Sumter, South Carolina Current (expired 1996-12-31)
   EDIT      (on/off)   Help   One Week of Data
Charleston Harbor
Click for Map
Fri -- 02:47 AM EDT     -2.32 knots Max Ebb
Fri -- 06:11 AM EDT     0.00 knots Slack
Fri -- 06:37 AM EDT     Sunrise
Fri -- 08:36 AM EDT     1.74 knots Max Flood
Fri -- 10:11 AM EDT     Moonset
Fri -- 11:56 AM EDT     -0.00 knots Slack
Fri -- 02:58 PM EDT     -2.17 knots Max Ebb
Fri -- 06:19 PM EDT     0.00 knots Slack
Fri -- 08:11 PM EDT     Sunset
Fri -- 08:52 PM EDT     1.92 knots Max Flood
Fri -- 10:49 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
-0.3-1.4-2.1-2.3-2-1.3-0.20.91.61.71.30.8-0.1-1.1-1.9-2.2-1.9-1.3-0.40.81.71.91.61.1

Weather Map
       (on/off)   Help Weather Map
wmap_A
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
Wind Forecast for Charleston, SC (8,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Charleston, SC
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.