Tuesday, August4, 2020
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Marine Weather and Tides
Rockville, 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 6:34AMSunset 8:16PM Tuesday August 4, 2020 10:06 AM EDT (14:06 UTC) Moonrise 8:20PMMoonset 6:21AM Illumination 100% Phase: Full Moon; Moon at 15 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
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AMZ330 Charleston Harbor- 705 Am Edt Tue Aug 4 2020
Today..W winds 5 kt, becoming S early this afternoon, then increasing to 10 kt late.
Tonight..S winds 5 to 10 kt.
Wed..S winds 5 to 10 kt. A chance of showers and tstms.
Wed night..S winds 10 kt. A chance of showers and tstms.
Thu..S winds 5 to 10 kt. A chance of showers and tstms.
Thu night..S winds 5 to 10 kt. A chance of showers and tstms.
Fri..S winds 5 to 10 kt. A chance of showers and tstms.
Fri night..S winds 5 to 10 kt. A chance of showers and tstms.
Sat..SW winds 5 to 10 kt. A chance of showers and tstms.
Sat night..SW winds 5 to 10 kt. A 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 84 degrees.
AMZ300 705 Am Edt Tue Aug 4 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A stationary front will stall out across the region through late week keeping rain chances a bit higher than normal.


7 Day Forecast for Marine Location Near Rockville, SC
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location: 32.6, -80.29     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 041135 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 735 AM EDT Tue Aug 4 2020

SYNOPSIS. A stationary front will stall out across the region through late week keeping rain chances a bit higher than normal.

NEAR TERM /THROUGH TONIGHT/. As of 730 AM: Sfc observations and Nighttime RGB indicated a large area of IFR stratus across the region. The low clouds may thick during the early daylight hours, then dissipating during the mid morning hours. I will update the forecast to adjust sky cover and morning temperatures.

As of 330 AM: Recent water vapor images show drier air pushing west to east across the forecast area in the wake of Isaias. KCLX detected a cluster of showers across the outer GA water. The activity appeared associated with a S/W on the east side of a mid- level long wave trough, expected to slide east over the Atlantic. The morning should feature at least partly sunny conditions across SE GA and SC, resulting in steadily warming temperatures. High resolutions indicated that a sea breeze by mid day, pushing inland during the afternoon hours. Temperature across SE GA are expected to peak in the mid 90s with dewpoints in the lower to mid 70s, yielding CAPE values between 2500-3000 J/kg. The moderate instability with DCAPE values around 1000 J/kg could support a severe thunderstorm or two over SE GA this afternoon. In addition, a GA coastal counties will see hot conditions this afternoon with heat index values around 105 degrees.

Tonight: The mid level trough axis will approach from the west. A few showers and thunderstorms may remain over the Atlantic through the overnight hours, land areas appear dry. Low temperatures are forecast to range from the mid 70s inland to upper 70s along the coast.

SHORT TERM /WEDNESDAY THROUGH FRIDAY/. Moderate confidence this period. The area will remain in a weak troughing pattern which will lead to at or above normal rain chances each day given the deep moisture continuing in place. Temperatures should remain near to above normal. Heat indices could peak close to Advisory levels (110 degrees) each day just inland from the coast.

LONG TERM /FRIDAY NIGHT THROUGH MONDAY/. Not much change to the weather pattern expected into early next week with the continuation of near to above normal rain chances and temperatures.

AVIATION /11Z TUESDAY THROUGH SATURDAY/. Prior to 12Z TAFs: Sfc observations and Nighttime RGB indicated a large area of IFR stratus across the region. Periods of restrictive ceilings are possible across the terminals through 15Z. High resolution guidance indicates that scattered showers and thunderstorms will develop across SE GA this afternoon. The potential for convection at KSAV will be highlighted with a TEMPO from 19-23Z. Otherwise, conditions should feature a steady SSW wind and Cu with bases around 5 kft.

Extended Aviation Outlook: High confidence in mostly VFR conditions at KCHS/KSAV through the weekend, mostly each afternoon/evening.

MARINE. Today and tonight, winds will remain from the ESE at around 10 kts with seas between 2- 4 ft.

Wednesday through Sunday: No significant concerns through the period with a fairly typical summertime pattern in place with mostly southerly winds 10-15 kt or less and seas 4 feet or less.

Rip Currents: Lingering backswell generated by Isaias will support a moderate risk for rip currents at all beaches today.

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

NEAR TERM . NED SHORT TERM . RJB LONG TERM . RJB AVIATION . NED/RJB MARINE . NED/RJB


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ACXS1 - ACE Basin Reserve, SC 9 mi81 min NNW 1 75°F 1016 hPa71°F
FBIS1 - Folly Island, SC 22 mi66 min WNW 2.9 G 5.1 78°F 1016 hPa (+2.1)
41033 23 mi58 min N 5.8 G 9.7 77°F 84°F1015.2 hPa
CHTS1 23 mi48 min WSW 4.1 G 6 82°F 84°F1015.6 hPa
41029 - Capers Nearshore (CAP 2) 38 mi58 min NW 7.8 G 12 77°F 83°F1015.1 hPa
FPKG1 - 8670870 - Fort Pulaski, GA 51 mi48 min N 2.9 G 5.1 76°F 84°F1015.9 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC17 mi71 minWNW 69.00 miFair79°F73°F84%1015.6 hPa
Beaufort County Airport, SC22 mi71 minN 05.00 miFog/Mist72°F71°F100%1015.6 hPa
Beaufort, Marine Corps Air Station, SC24 mi70 minNNE 310.00 miOvercast73°F71°F94%1015.5 hPa

Link to 5 minute data for KJZI

Wind History from JZI (wind in knots)
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W6S8SW3CalmCalmCalmCalmNW6NW5W4
1 day ago4SE4SE5SE8SE9SE7
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2 days agoSW5SW7
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Tide / Current Tables for Steamboat Landing, Steamboat Creek, South Carolina
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Steamboat Landing
Click for Map
Tue -- 03:38 AM EDT     0.17 feet Low Tide
Tue -- 06:37 AM EDT     Sunrise
Tue -- 07:21 AM EDT     Moonset
Tue -- 10:03 AM EDT     5.93 feet High Tide
Tue -- 03:41 PM EDT     0.03 feet Low Tide
Tue -- 08:15 PM EDT     Sunset
Tue -- 09:19 PM EDT     Moonrise
Tue -- 10:33 PM EDT     7.08 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.33.51.70.40.212.23.54.75.65.95.64.531.40.30.10.82.13.75.16.377

Tide / Current Tables for Lower Toogoodoo Creek, 2 mi. above entrance, South Carolina
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Lower Toogoodoo Creek
Click for Map
Tue -- 04:01 AM EDT     0.19 feet Low Tide
Tue -- 06:37 AM EDT     Sunrise
Tue -- 07:21 AM EDT     Moonset
Tue -- 10:43 AM EDT     6.65 feet High Tide
Tue -- 04:04 PM EDT     0.04 feet Low Tide
Tue -- 08:16 PM EDT     Sunset
Tue -- 09:20 PM EDT     Moonrise
Tue -- 11:13 PM EDT     7.94 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.952.80.90.20.61.83.24.65.76.56.65.84.32.40.800.41.63.24.96.37.47.9

Weather Map
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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 (10,2,3,4)
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Ground Weather Radar Station Charleston, SC
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weather_mapweather_map weather_map

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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.