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Marine Weather and Tides Hilton Head 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.

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Sunrise 6:42AM

Sunset 8:14PM

Sunday August 9, 2020 4:16 PM EDT (20:16 UTC)

Moonrise 10:49PM

Moonset 11:03AM

Illumination 67%

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 Hilton Head Island, SC

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Area Discussion for - Charleston, SC

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FXUS62 KCHS 092005 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 405 PM EDT Sun Aug 9 2020

SYNOPSIS. The region will remain positioned between Atlantic high pressure and an inland area of broad low pressure.

NEAR TERM /UNTIL 6 AM MONDAY MORNING/. Through Sunset: Radar imagery indicates blobs of thunderstorms across portions of our area. CAMs are in good agreement keeping the convection mostly along the inland moving sea breeze. Though, some convection is also anticipated further inland of the sea breeze. The storms are tapping into abundant instability. SPC Mesoscale Analysis shows MLCAPEs peaking in the 2,500-3,000 J/kg range in the next few hours. Additionally, DCAPEs are in the 800-1,000 J/kg range. Marginally severe pulse thunderstorms with damaging wind gusts are a concern into the evening. Additionally, weak steering flow aloft will equate to very little storm movement. With PWATs ~2", locally heavy rainfall is expected, so flooding of low-lying and poorly drained areas is a concern.

Tonight: A stationary front will remain to the west of our area. Convection over land is forecasted to dissipate during the evening. Then, the focus for convection shifts over the coastal waters. Some showers could brush the immediate coast late tonight, which is where we have slight chance POPs. Low temperatures should range from the low to mid 70s inland and the upper 70s to around 80 degrees at the immediate coast.

SHORT TERM /6 AM MONDAY MORNING THROUGH WEDNESDAY/. A mid level trough will remain over the region as ridging builds to the west. The sfc pattern should support the formation of a sea breeze both days. Given a broad field of instability and deep moisture, the environment should yield scattered to numerous thunderstorms each afternoon, especially along and west of the sea breeze. Forecast soundings indicate that PW values will range between 2-2.25 inches with storm motions of 10 mph or less. The combination of slow storm motions and the potential for back building storms could result in localized areas of excessive rainfall. High temperatures are forecast to range from 90 near the coast to mid 90s inland.

LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/. Very little change in the large scale pattern is shown by global models through the period as a broad trough persists inland and higher pressure well offshore over the Atlantic. This will continue light southerly winds with afternoon sea breezes each day. Although deep layer moisture will be sufficient with PWs 1.5 to 2 inches, lack of any significant large scale forcing will mean that the sea breeze will continue to be the primary way convection will initiate. Model blended PoPs continue to be in the likely range each afternoon, which is about 20 percent above climo. Continue to feel a little uncomfortable with PoPs in that range so far out. However, the higher blended PoPs collaborate well with surrounding offices. Did adjust PoPs downward by 5-10 percent, especially toward the end of the period. High temperatures will continue near normal, while low temperatures likely to continue a few degrees above normal. Given light steering flow, locally heavy rainfall cannot be ruled out each afternoon.

AVIATION /20Z SUNDAY THROUGH FRIDAY/. 20Z Update: Radar indicates sea breeze thunderstorms over portions of our area. For SAV, since impacts seem more likely, we added a TEMPO for IFR due to TSRA. For CHS, we opted to maintain the VCTS. But if radar trends indicate a direct impact for CHS, then an amendment will be made to add a TEMPO group. Otherwise, the thunderstorms are forecasted to dissipate this evening, followed by a dry night. Though, it's possible some ground fog could occur in areas where there is heavy rainfall. The probabilities of this happening at either TAF site is currently too low to mention. Another round of convection is anticipated Monday afternoon.

Extended Aviation Outlook: Scattered to numerous thunderstorms will develop over the region each afternoon and evening. It is possible that brief flight restrictions could occur at KCHS and KSAV with the passage of any thunderstorm.

MARINE. Tonight: Expect tranquil conditions outside of any convection. S winds around 10 kt this evening will veer to the SW after midnight. Seas will average 1-2 ft.

Monday through Thursday: The sfc pattern will feature high pressure centered over the western Atlantic and broad low pressure inland. This pattern should generally support south winds between 10 to 15 kt and seas between 1-3 ft.

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

NEAR TERM . SHORT TERM . NED LONG TERM . RFM AVIATION . NED MARINE . NED

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
FPKG1 - 8670870 - Fort Pulaski, GA	15 mi	46 min	ESE 1.9 G 7	86°F	85°F		1020.9 hPa
41033	20 mi	68 min	SSE 7.8 G 9.7	85°F	88°F		1019.4 hPa
ACXS1 - ACE Basin Reserve, SC	29 mi	91 min	SE 1.9	91°F			1020 hPa	76°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA	57 mi	26 min	SSE 9.7 G 12	85°F	87°F	1 ft	1019 hPa (-2.3)	77°F

Wind History for Fort Pulaski, GA

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S5 G8

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Hilton Head Island, Hilton Head Airport, SC	4 mi	86 min	S 4	10.00 mi	A Few Clouds	88°F	75°F	66%	1020 hPa
Beaufort County Airport, SC	15 mi	21 min	SW 4	7.00 mi	Thunderstorm Light Rain	86°F	73°F	66%	1019.6 hPa
Beaufort, Marine Corps Air Station, SC	18 mi	20 min	SSE 19 G 42	0.50 mi	Thunderstorm Heavy Rain Fog and Breezy	76°F	72°F	88%	1019.7 hPa
Savannah-Hilton Head International Airport, GA	23 mi	23 min	E 11	10.00 mi	Thunderstorm in Vicinity Light Rain	77°F	73°F	88%	1020.2 hPa
Hunter U. S. Army Airfield, GA	24 mi	20 min	ESE 13 G 18	0.75 mi	Thunderstorm Heavy Rain	73°F	68°F	85%	1020.6 hPa

Link to 5 minute data for KHXD

Wind History from HXD (wind in knots)

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Tide / Current Tables for Skull Creek, south entrance, Hilton Head Island, South Carolina

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Tide / Current Tables for Savannah River Entrance, Georgia 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 (16,3,4,5)

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Ground Weather Radar Station Charleston, SC

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