Sunday, September27, 2020
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Marine Weather and Tides
Ridgeland, 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.

Sunrise 7:13AMSunset 7:13PM Sunday September 27, 2020 12:31 PM EDT (16:31 UTC) Moonrise 4:23PMMoonset 2:09AM Illumination 79% Phase: Waxing Gibbous; Moon at 10 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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AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 928 Am Edt Sun Sep 27 2020
Rest of today..E winds 5 kt. Seas 2 ft. A chance of showers this afternoon.
Tonight..S winds 5 to 10 kt. Seas 2 ft. Showers likely with a slight chance of tstms in the evening, then a chance of showers after midnight.
Mon..E winds 5 to 10 kt. Seas 2 ft. A slight chance of tstms. A chance of showers in the morning, then showers likely in the afternoon.
Mon night..S winds 10 kt. Seas 2 to 3 ft. Showers likely with a slight chance of tstms.
Tue..S winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a slight chance of tstms.
Tue night..SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft. A slight chance of tstms. Showers likely.
Wed..W winds 15 kt. Seas 2 to 3 ft. A chance of showers.
Wed night..W winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance of showers.
Thu..W winds 5 to 10 kt. Seas 2 ft.
Thu night..SW winds 5 to 10 kt. Seas 2 ft. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 928 Am Edt Sun Sep 27 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Weak high pressure offshore today. A warm front will lift north through the area late tonight into Monday. A cold front will shift through the region Tuesday into early Wednesday, followed by high pressure through late week.


7 Day Forecast for Marine Location Near Ridgeland, SC
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location: 32.41, -80.89     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 271314 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 914 AM EDT Sun Sep 27 2020

SYNOPSIS. Weak high pressure offshore today. A warm front will lift north through the area late tonight into Monday. A cold front will shift through the region Tuesday into early Wednesday, followed by high pressure through late week.

NEAR TERM /THROUGH TONIGHT/. Surface observations indicate the fog has lifted across most of the area, and this trend will continue the rest of this morning. Though, patches of stratus across the area may take a little longer to lift. The stratus may hold down temperatures initially. We'll hold off on making any major changes at this point in order to see how temperature observations and trends develop.

Today: Weak high pressure centered over the South Carolina Upstate into western North Carolina will drift off the Southeast U.S. coast this afternoon. A potent upper low centered over the lower Mississippi Valley will open and kick out over the Deep South and Tennessee Valley in response to a sharp upper trough digging across the Northern Plains. As the upper low ejects out, deep moisture with origins from the Gulf of Mexico will be drawn northeast across the Florida Panhandle and into eastern portions of Georgia and South Carolina. This moisture plume will feature PWATs in the 2-2.25" range, which is about 1-2 standard deviations above normal for late September.

As forcing for assent increases with the negatively tilted upper trough and within the right entrance region of an 85 kt jet streak noted along its southeastern flank, expect a large area of showers with embedded tstms to develop over the western Florida Panhandle after daybreak and quickly spread into Southeast South Carolina and Southeast Georgia through the afternoon. Much of this rainfall will be light in nature given the lack of significant instability within the tropical moisture plume, but pockets of locally moderate rain will be possible given the strong omega fields noted in model cross-sections. The area of rain is expected to push offshore by midnight with only isolated to possibly scattered showers lingering through the night within a weak warm air advection regime ahead of the next storm system.

Afternoon pops will be range from 20-30% across the Charleston Tri-County area to 60-70% across Southeast South Carolina into far southern South Carolina; highest along/south of the I-16 corridor, including the Savannah Metro Area. Pops were curtailed somewhat for the Charleston Tri-County area as it is unclear exactly how quickly a pocket of mid-level dry air will erode ahead of the upper trough and the leading edge of the tropical moisture plume. Pops tonight will range from the 50-70% this evening then diminish to 20-30% after midnight as the main rain area moves offshore. As mentioned earlier, instability will remain weak as the atmospheric profile becomes increasingly moist. However, the combination of strong vertical velocities ahead of the upper trough and the presence of at least surface- based instability should be enough to support least some embedded tstm activity. Coverage will limited to slight chance for now.

There should be enough insolation to support highs reaching the lower-mid 80s for most areas away from the beaches today before rain spreads in from the southwest. Lows tonight will range from the upper 60s inland to the mid 70s at the beaches. There will be a risk for stratus and fog developing early Monday.

SHORT TERM /MONDAY THROUGH WEDNESDAY/. Monday: The day should start out fairly wet with moisture advection occurring across the area in a light southerly flow. Weak isentropic lift and diurnal heating should promote additional showers and a few thunderstorms over the course of the day, with the bulk of activity initially starting across Southeast Georgia, then gradually trending northeast and offshore where the greatest mid-lvl vorticity advances away from the region. High temps should peak in the lower 80s across most areas. Few to scattered showers and thunderstorms should persist into the overnight period with ample moisture in place, but greatest precip coverage should remain near coastal locations and offshore. Low temps will range in the upper 60s inland to lower 70s closer to the coast.

Tuesday: A high amplitude trough will dig across the Central United States and into the East Conus with a mid-lvl low attempting to become cut-off from the main longwave trough across the Southeast United States late. The pattern will help drive a cold front across the Appalachian Mountains during morning hours and eventually toward Southeast South Carolina and Southeast Georgia late in the day. Deep moisture within a southerly flow ahead of this feature should spawn showers and thunderstorms across the region late morning into early afternoon, but the bulk of precip activity is anticipated late afternoon into the evening as the front begins to advance east across the area. Numerous showers and thunderstorms are possible, especially across inland counties late afternoon into early evening along/near the front, then toward coastal locations during early overnight hours.

Timing of the cold front will be key in regards to the potential for severe weather across the region. Strong wind fields suggest abundant 0-6 km bulk shear while SBCAPE approaches 1000-1500 J/kg, mid-lvl lapse rates peak near 7.0 C/km and lifted index values range between -2 C to -4 C mid to late afternoon. However, there is quite a bit of uncertainty in regards to potential instability during the timing of fropa given a somewhat short recovery time after morning showers and thunderstorms, continued cloud cover and/or the gradual loss of diurnal heating heading into sunset. At this time, greatest severe weather chances appear to be along/near the I-95 corridor across Southeast South Carolina where fropa has a higher chance of occurring before sunset and conditions resemble a high shear/low cape scenario. A few strong/severe thunderstorms could even reach the coast with the quickly advancing cold front during the early overnight period given the amount of shear in place to maintain thunderstorm updrafts and strong mid-upper lvl forcing associated with a potent h5 shortwave traversing the Southeast United States, especially should convection upstream start off particularly strong before sunset. High temps should approach the lower 80s before the onset of showers/thunderstorms. Lows should be quick to cool off post fropa, dipping into the upper 50s inland to low/mid 60s near the coast.

Wednesday: Considerably drier air will enter the region from the west with high pressure building in wake of a cold front well offshore across the western Atlantic. However, a trailing mid/upper lvl low could help produce few to scattered showers with any remaining moisture across the area, before chances likely decrease during the later half of the day as the mid/upper lvl low advances further east and westerly winds prevail. High temps will be noticeably cooler than the previous day, peaking only in mid 70s across most areas.

LONG TERM /WEDNESDAY NIGHT THROUGH SATURDAY/. High pressure will prevail at the sfc through late week while the area remains along the southern edge of a longwave trough of low pressure extending across much of the East Conus. The pattern will favor an extended period of dry and cooler conditions during the second half of the week with high temps generally peaking in the upper 70s Thursday and Friday, then low/mid 70s through the weekend. Overnight lows will also be some 10-15 degrees colder than earlier in the week, dipping into the mid/upper 50s away from the coast mid- week, then low/mid 50s away from the coast during the weekend. Overnight temps along the beaches should remain in the low 60s.

AVIATION /13Z SUNDAY THROUGH THURSDAY/. 13Z Update: Stratus has floated in over both terminals within the past hour, leading to flight restrictions. Satellite imagery seems to show the stratus is relatively thin in depth and coverage. Though, the view is somewhat obstructed by higher clouds. Models generally show the stratus lifting within the next hour or two, so we are covering this with a TEMPO group at both sites.

Light rain is expected to break out from southwest to northeast late this afternoon and persist into this evening before shifting east. Vsbys look to average 3-6SM in this rain, heaviest at KCHS. Will show prevailing MVFR at KSAV 21-02z for now and keep vsbys right at low-end VFR at KCHS 23-03z. The risk for tstms look too low to justify a mention at this time.

Extended Aviation Outlook: Flight restrictions are possible Monday with showers and/or thunderstorms developing across the area. More significant chances of flight restrictions are possible Tuesday into early Wednesday with showers and thunderstorms along/near a passing cold front. VFR conditions should then prevail Wednesday afternoon into Thursday with dry high pressure spreading across the region.

MARINE. Through Tonight: Light wind fields will persist. East to northeast winds this morning will veer to the east and southeast this afternoon as a weak sea breeze circulation develops along the coast. More southerly winds will prevail tonight ahead of the next storm system. Speeds will remain less than 10 kt through the period with seas 1-3 ft.

Monday through Thursday: A fairly weak pressure gradient will remain in place Monday while a weak warm front advances north of the area. In general, southeast winds will become south, remaining at or below 15 kt through Monday night. Seas will range between 1-3 ft, highest across offshore Georgia waters. Winds/seas will then increase/build Tuesday into Wednesday as a cold front sweeps across the area with a fair amount of cold air advection in its wake. Winds/seas could approach marginal Small Craft Advisory levels post fropa, but should fall just short of criteria with west/northwest winds gusting up to 20 kt and seas building upwards to 2-4 ft across nearshore waters and 3-5 ft across offshore Georgia waters. Conditions should then improve Thursday as high pressure prevails across the region.

EQUIPMENT. The KCLX radar is expected to be down through at least most of Monday due to an equipment failure.

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



NEAR TERM . SHORT TERM . LONG TERM . AVIATION . MARINE . EQUIPMENT .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ACXS1 - ACE Basin Reserve, SC 25 mi106 min NNE 1.9 77°F 1017 hPa68°F
FPKG1 - 8670870 - Fort Pulaski, GA 26 mi43 min 75°F 75°F1017.1 hPa
41033 27 mi23 min ENE 7.8 G 12 74°F 77°F1016.8 hPa
FBIS1 - Folly Island, SC 56 mi91 min ENE 4.1 G 5.1 73°F 1017.8 hPa (+1.0)

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beaufort, Marine Corps Air Station, SC10 mi35 minE 310.00 miFair78°F66°F69%1016.5 hPa
Beaufort County Airport, SC14 mi36 minENE 510.00 miFair77°F66°F69%1016.6 hPa
Hilton Head Island, Hilton Head Airport, SC17 mi41 minE 77.00 miMostly Cloudy77°F69°F79%1016.9 hPa

Link to 5 minute data for KNBC

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Last 24hrNW7W8NW6N4NW5NW6NW6N6N5N5N5CalmCalmCalmCalmCalmN3CalmCalmN4NE4NE5NE4E3
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S7SE9SE5S5S3NE8NE6W10W6CalmCalmCalmCalmNE3NE3N3N5N6N6N5
2 days agoE6SE6SE5SE8SE6E6E6E8E4CalmSE3CalmCalmS3S5S7SE7S6CalmS6S4SE3S66

Tide / Current Tables for Broughton Point, Hazzard Creek, Broad River, South Carolina
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Broughton Point
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Sun -- 01:03 AM EDT     0.80 feet Low Tide
Sun -- 03:09 AM EDT     Moonset
Sun -- 06:51 AM EDT     7.43 feet High Tide
Sun -- 07:15 AM EDT     Sunrise
Sun -- 01:12 PM EDT     0.74 feet Low Tide
Sun -- 05:22 PM EDT     Moonrise
Sun -- 07:12 PM EDT     Sunset
Sun -- 07:33 PM EDT     8.32 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.40.81.32.64.367.17.46.95.94.52.91.50.812.23.95.87.38.28.27.56.24.5

Tide / Current Tables for Hwy. 170 bridge, Broad River, South Carolina
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Hwy. 170 bridge
Click for Map
Sun -- 12:19 AM EDT     0.92 feet Low Tide
Sun -- 03:08 AM EDT     Moonset
Sun -- 06:08 AM EDT     7.16 feet High Tide
Sun -- 07:14 AM EDT     Sunrise
Sun -- 12:28 PM EDT     0.86 feet Low Tide
Sun -- 05:22 PM EDT     Moonrise
Sun -- 06:50 PM EDT     8.01 feet High Tide
Sun -- 07:12 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.12.23.75.46.67.26.964.83.31.9111.93.45.16.77.787.56.44.93

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.
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Ground Weather Radar Station Charleston, SC
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