Monday, July26, 2021
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Marine Weather and Tides
Bluffton, SC

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:33AMSunset 8:26PM Monday July 26, 2021 8:25 PM EDT (00:25 UTC) Moonrise 9:39PMMoonset 8:05AM Illumination 93% Phase: Waning Gibbous; Moon at 17 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- 729 Pm Edt Mon Jul 26 2021
Tonight..SE winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of tstms. A slight chance of showers this evening, then a chance of showers after midnight.
Tue..S winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers and tstms.
Tue night..SW winds 10 kt. Seas 3 ft. A chance of showers and tstms.
Wed..SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Wed night..SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms, mainly in the evening.
Thu..W winds 5 kt, becoming S in the afternoon. Seas 2 ft.
Thu night..SW winds 10 to 15 kt. Seas 2 to 3 ft.
Fri..SW winds 10 to 15 kt. Seas 2 to 3 ft.
Fri night..SW winds 15 kt. Seas 3 to 4 ft.
Sat..SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Sat night..SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 729 Pm Edt Mon Jul 26 2021
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Weak low pressure will move onshore across southeast georgia this evening. A trough will then bring unsettled weather through midweek. A weak front could drop into the region late week and stall over the weekend.


7 Day Forecast for Marine Location Near Bluffton, SC
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location: 32.24, -80.85     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 270005 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 805 PM EDT Mon Jul 26 2021

SYNOPSIS. Weak low pressure will move onshore across southeast Georgia this evening. A trough will then bring unsettled weather through midweek. A weak front could drop into the region late week and stall over the weekend.

NEAR TERM /UNTIL 6 AM TUESDAY MORNING/. As of 8 PM: Regional radar indicated that the center of low pressure was pushing onshore south of the Altamaha River. Rounds of showers and isolated thunderstorms will remain possible as the low tracks north along the coast. Circulation around the low is aiding in pushing the sea breeze well inland. KCLX detected a fine line and a band of showers associated with the sea breeze over northern Dorchester, across Hampton, to northern Bulloch Counties. The sea breeze should continue to push inland, eventually reaching the outflow boundary and convection pushing east across the Midlands of SC. After the convergence of the two boundaries, upstream convection should be disrupted and gradually dissipate.

Previous Discussion: Tonight: The surface low to our south will move onto land over southeast Georgia this evening and begin to dissipate, leaving us within a southeast to south flow around the far western portion of the sub-tropical Atlantic ridge. Diurnally driven convection will fade early on, before some nocturnal convection that forms over the ocean makes a run for the shore overnight. Coverage will wane from north to south with 40-50% PoPs decreasing to 15-25% by the evening. Isolated showers and thunderstorms will continue over the waters and across the extreme southeast GA counties tonight, given that it'll remain unstable offshore. Southerly flow will begin to push convection onshore once again after midnight when low-level convergence strengthens. Coverage will increase toward daybreak as land areas begin to destabilize fairly quickly, which is when we have slight chance PoPs over the coastal counties.

There will be areas of low stratus and perhaps even some isolated areas of patchy fog well west of I-95 early morning. Models are showing the greatest potential just outside our forecast area, and given that yesterday's models over- forecasted fog probabilities for last night, mention of fog has been left out of the forecast.

Given the southeast synoptic flow and elevated dew points, it'll be a relatively warm and humid night. Lows will only reach the mid to upper 70s, and around 80F in Downtown Charleston/immediate coastline.

SHORT TERM /6 AM TUESDAY MORNING THROUGH THURSDAY/. A surface trough of low pressure will linger over the region through midweek. Aloft, a broad trough will persist over the Northeast with a large ridge over the Central U.S. Models indicate PWats will surge to near or over 2.25 inches Tuesday into Wednesday, before gradually decreasing Wednesday evening. These values are well above late July climatology. With aid from weak shortwave energy, scattered to numerous showers and thunderstorms are expected to develop. Coverage will peak in the afternoons when instability is greatest, but activity will be possible just about any time including overnight.

Given the deep moisture and fairly weak storm motions, there will be a threat for locally heavy rainfall which is backed up by some probabilistic guidance including the HREF. Slow moving storms could lead to minor flooding in low-lying and poor drainage areas. The severe threat looks to be low overall, but a couple stronger to possibly severe storms can't be ruled out, with the main hazard being isolated damaging wind gusts.

Moisture levels will be much lower on Thursday and with lack of large scale forcing, shower/thunderstorm coverage is expected to be less than previous days. Perhaps the more interesting forecast note of the day will be the temperatures. Highs are expected to average in the low to mid 90s, highest inland, with heat indices around 105.

LONG TERM /THURSDAY NIGHT THROUGH MONDAY/. Surface troughing will linger inland on Friday before a weak front drops into the region and possibly stalls in the vicinity over the weekend. Mainly diurnally driven showers and thunderstorms are possible each day. Hot temperatures and higher relative humidity values could lead to heat indices of 105-110. Given our heat advisory criteria of 110, we will need to monitor the potential for Heat Advisories, especially on Friday.

AVIATION /00Z TUESDAY THROUGH SATURDAY/. Prior to the 0Z TAFs, regional radar indicated that the center of low pressure was pushing onshore south of the Altamaha River. Rounds of showers and isolated thunderstorms will remain possible as the low tracks north along the coast. Late tonight, the combination of deep moisture and weak forcing near the low center should develop a patch of MVFR ceilings across SE GA. The low ceilings will have the greatest chance developing over KSAV after 9Z and could remain through the rest of the TAF period. Latest HRRR and HREF indicates that SHRA and TSRA will develop near and to the north of the low center, highlighted with either VCSH/VCTS for much of the day and TEMPO groups for each site between 15-19Z for TSRA.

Extended Aviation Outlook: Flight restrictions are possible in showers and thunderstorms through Wednesday.

MARINE. Tonight: The weak surface low that is just to our south will move onshore southeast Georgia this evening. The marine community will be situated on the western periphery of the sub- tropical ridge, producing south to southeast winds of 15 kt or less. Seas will average 2 to 4 feet, with isolated to scattered thunderstorms continuing over the waters through the night.

Tuesday through Saturday: Generally south to southwest winds expected through late week. Winds are expected to remain below Small Craft Advisory criteria, although speeds on Friday could be in the 15-20 knot range as the pressure gradient tightens. Seas will average 2-4 feet.

TIDES/COASTAL FLOODING. The chances for minor salt water inundation in the Downtown Charleston area during tonight's high tide has diminished. As winds become more unfavorable and astronomical tides continue to decrease, the recent series of Coastal Flood Advisories has ended, at least for the near future.

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



NEAR TERM . NED SHORT TERM . ETM LONG TERM . ETM AVIATION . NED MARINE . BRM/ETM TIDES/COASTAL FLOODING .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 14 mi55 min 82°F 84°F1014.2 hPa
41033 24 mi77 min SSE 9.7 G 16 83°F 84°F1013.2 hPa
ACXS1 - ACE Basin Reserve, SC 30 mi100 min ESE 1.9 86°F 1014 hPa79°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 58 mi95 min SSE 18 G 21 82°F 83°F5 ft1011.9 hPa (-0.8)80°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilton Head Island, Hilton Head Airport, SC8 mi35 minSSE 49.00 miMostly Cloudy84°F77°F79%1014.6 hPa
Beaufort County Airport, SC17 mi50 minSE 310.00 miFair82°F77°F84%1014.2 hPa
Beaufort, Marine Corps Air Station, SC18 mi29 minSE 510.00 miMostly Cloudy84°F78°F82%1014.4 hPa
Savannah-Hilton Head International Airport, GA20 mi32 minESE 610.00 miPartly Cloudy83°F77°F82%1013.6 hPa
Hunter U. S. Army Airfield, GA22 mi29 minESE 510.00 miMostly Cloudy83°F77°F81%1013.1 hPa

Link to 5 minute data for KHXD

Wind History from HXD (wind in knots)
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Calm4CalmCalmCalmCalmCalmN7N7NE8NE8NE8NE8E5E6E6NE8E10E4
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Tide / Current Tables for Bluffton, May River, South Carolina
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
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Mon -- 03:02 AM EDT     -2.60 knots Max Ebb
Mon -- 05:40 AM EDT     0.01 knots Slack
Mon -- 06:34 AM EDT     Sunrise
Mon -- 08:10 AM EDT     2.19 knots Max Flood
Mon -- 09:05 AM EDT     Moonset
Mon -- 11:46 AM EDT     -0.00 knots Slack
Mon -- 03:12 PM EDT     -2.20 knots Max Ebb
Mon -- 05:50 PM EDT     0.00 knots Slack
Mon -- 08:24 PM EDT     Sunset
Mon -- 08:32 PM EDT     2.27 knots Max Flood
Mon -- 10:38 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.5-1.6-2.3-2.6-2.2-10.51.72.221.60.8-0.3-1.3-1.9-2.2-2-1.10.21.52.22.21.91.4

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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