Sunrise 6:25 AM   Sunset 8:35 PM Moonrise 2:57 AM   Moonset 5:53 PM

  Print   HELP   Reset   Save   Recall  News

AMZ450 Coastal Waters From Altamaha Sound To Fernandina Beach Fl Out 20 Nm- Coastal Waters From Fernandina Beach To St. Augustine Fl Out 20 Nm- Coastal Waters From St. Augustine To Flagler Beach Fl Out 20 Nm- 403 Am Edt Wed Jul 3 2024
Today - Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave detail: south 2 feet at 4 seconds and northeast 2 feet at 7 seconds. Intracoastal waters light chop. A chance of showers and Thunderstorms. Tonight - Southeast winds 5 to 10 knots, becoming south after midnight. Seas 2 to 3 feet. Wave detail: northeast 2 feet at 7 seconds and southeast 2 feet at 8 seconds. Intracoastal waters light chop. A slight chance of showers and Thunderstorms. Thursday - East winds 5 to 10 knots. Seas 2 to 3 feet. Wave detail: northeast 2 feet at 7 seconds and southeast 2 feet at 8 seconds. Intracoastal waters light chop. A slight chance of showers and Thunderstorms in the morning, then a chance of showers and Thunderstorms in the afternoon. Thursday night - East winds 5 to 10 knots. Seas 2 to 3 feet. Wave detail: northeast 2 feet at 7 seconds and east 2 feet at 9 seconds. Intracoastal waters light chop. Friday - East winds 5 to 10 knots, becoming southeast in the afternoon. Seas 2 to 3 feet. Wave detail: northeast 2 feet at 7 seconds and east 2 feet at 11 seconds. Intracoastal waters light chop. A chance of showers with a slight chance of Thunderstorms in the afternoon. Friday night - Southeast winds around 10 knots, becoming south after midnight. Seas 2 to 3 feet. Wave detail: east 3 feet at 9 seconds and northeast 2 feet at 7 seconds. Intracoastal waters light chop. A slight chance of showers and Thunderstorms in the evening. Saturday - South winds 10 to 15 knots. Seas 2 to 3 feet. Intracoastal waters a moderate chop. A chance of showers with a slight chance of Thunderstorms. Sunday - South winds 10 to 15 knots. Seas 2 to 3 feet. Intracoastal waters a moderate chop. A chance of showers and Thunderstorms.
winds and waves higher in and near Thunderstorms.

AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 403 Am Edt Wed Jul 3 2024
Synopsis -
prevailing winds have shifted to easterly as high pressure building over the mid-atlantic states Wedges down the southeastern seaboard. Showers and Thunderstorms will increase in coverage across our local waters along and south of a stalled frontal boundary through today. The frontal boundary will gradually dissipate over the georgia waters by Thursday, with prevailing onshore winds continuing as high pressure weakens off the eastern seaboard. Coverage of showers and Thunderstorms are expected to decrease across our local waters late this week through Saturday, with prevailing winds then shifting to southwesterly during the weekend ahead of the next weakening frontal boundary that will be entering the southeastern states.

Gulf stream -
the approximate location of the west wall of the gulf stream as of jul 02, 2024 at 1200 utc - .
57 nautical miles east of flagler beach. 66 nautical miles east of saint augustine beach. 75 nautical miles east of jacksonville beach. 84 nautical miles east southeast of st simons island.
this data courtesy of the naval oceanographic office.

FXUS62 KCHS 030722 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 322 AM EDT Wed Jul 3 2024

SYNOPSIS
A weak front will linger near the area today. Through the rest of the week, a hot and humid air mass will build over the region. A weak cold front could approach the region by early next week.

NEAR TERM /THROUGH TONIGHT/
Today: Aloft, prominent upper ridging will become centered across an area from east Texas to the Southeast coast. At the surface, high pressure will start the day wedged in across Georgia and the Carolinas with the weak boundary still lingering along and just off the coast. Through the day, the boundary will wash out as the surface high slips off the east coast. The most active part of the day will be the morning, as subtle convergence near the weak boundary generates showers within and airmass with precipitable water values of 2-2.25 inches. Most of the shower activity will be focused across the coastal waters and along the immediate coastline during the morning. There could still be a few pockets of heavy rain along the coast, but these should be isolated in nature. Then into the afternoon, the upper ridge steadily builds in aloft and model soundings aren't particularly impressive. The suite of hi-res model guidance favors southeast Georgia with only isolated convection, and we have decreased rain chances to reflect less coverage.
Temperatures will be much more typical of early July with low 90s inland and upper 80s along the immediate coast.

Tonight: Overall, a quiet night is expected as see little to no overnight convection. The boundary we have been dealing with for the last few days will no longer be present and we carry a dry forecast for the forecast area. Look for lows in the low to mid 70s.

SHORT TERM /THURSDAY THROUGH SATURDAY/
A mid level ridge will extend across the region late week into the weekend. A closed low over the Atlantic will drift westward towards the Southeast coast late. The surface pattern will largely feature high pressure offshore and trough of low pressure inland. A weak front will approach the region on Saturday but will stay well west of the local area.

The weather should be fairly quiet for Independence Day and Friday with influence of the ridge helping to limit convection.
Just isolated showers and thunderstorms are forecast. Saturday should be a bit more convectively active, especially inland, with better instability and possibly some weak upper support.
There could be development with the sea breeze, but it appears most will trigger off the inland trough and then move into the local area from the west. Rain chances peaking 40-50% in these locations seems reasonable.

Temperatures will rise with time. Highs in the low to mid 90s Thursday will warm to the mid to upper 90s away from the immediate coast for Friday and Saturday. It will feel even hotter with heat indices approaching the local Heat Advisory criteria of 108 in spots. Friday looks more marginal, with Saturday having the better chance for excessive heat headlines.
Lows average in the mid to upper 70s.

LONG TERM /SATURDAY NIGHT THROUGH TUESDAY/
Ridging generally prevails aloft early next week in between a mid level trough to the west and closed low over the Atlantic which should eventually weaken. Surface pattern maintains high pressure offshore and troughing inland. Guidance indicates PWats exceeding 2 inches through much of the period. At least scattered showers and thunderstorms will be possible each day, with highest coverage in the afternoon and evenings.
Temperatures are forecast to stay slightly above normal.

AVIATION /07Z WEDNESDAY THROUGH SUNDAY/
The 06z TAF period begins with VFR conditions at KCHS, KJZI, and KSAV. The biggest concerns through the overnight will be showers and MVFR ceilings at KSAV and possibly KJZI. Radar imagery shows shower activity along the Chatham County coast that could approach KSAV over the next couple of hours. Showers and possible ceilings are less certain at KJZI, and we have kept the forecast VFR at both KCHS and KJZI. Other than some coastal showers in the morning, very little convective coverage is expected this afternoon and evening.

Extended Aviation Outlook: Brief flight restrictions are possible in showers and thunderstorms, mainly in the afternoon and evenings through the period.

MARINE
Today and tonight: North-northeast flow should prevail across the local waters through the period. Wind should be strongest today, focused along the coast with the development of the afternoon sea breeze. Speeds should mostly be 10-15 knots, with gusts up to 20 knots along the coast. Overnight, speeds should drop off to 5-10 knots late. Seas are expected to average 2-4 feet.

Thursday through Monday: Northeast/east winds initially will turn southerly by late week. Marine conditions should stay solidly below small craft advisory criteria with speeds 15 knots or less and seas averaging 2-3 feet.

Rip currents: Longer period swell and the approaching new moon will lead to an elevated risk for rip currents on Thursday.
Local calculations give borderline low-moderate risk, but given the Independence Day holiday, opted for moderate.

TIDES/COASTAL FLOODING
Onshore winds and the approach of the new moon will lead to elevated tides over the next couple of days along the Charleston and Colleton county coasts. Tides levels could approach minor coastal flooding criteria of 7 ft MLLW in the Charleston Harbor with the evening high tides today and Thursday. Further south, no tide issues are expected.

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

toggle option: (graph/table)

Jones Creek entrance
Click for Map
Wed -- 12:57 AM EDT     0.30 feet Low Tide
Wed -- 03:57 AM EDT     Moonrise
Wed -- 06:25 AM EDT     Sunrise
Wed -- 07:33 AM EDT     6.71 feet High Tide
Wed -- 12:58 PM EDT     -0.43 feet Low Tide
Wed -- 06:52 PM EDT     Moonset
Wed -- 08:02 PM EDT     8.43 feet High Tide
Wed -- 08:33 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Jones Creek entrance, Hampton River, Georgia, Tide feet

Old Tower
Click for Map
Wed -- 12:57 AM EDT     0.28 feet Low Tide
Wed -- 03:56 AM EDT     Moonrise
Wed -- 06:25 AM EDT     Sunrise
Wed -- 06:42 AM EDT     6.39 feet High Tide
Wed -- 12:58 PM EDT     -0.41 feet Low Tide
Wed -- 06:52 PM EDT     Moonset
Wed -- 07:11 PM EDT     8.03 feet High Tide
Wed -- 08:33 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Old Tower, Sapelo Island, Georgia, Tide feet

Full Color Weather Map

Link to Loop


Other links: GEOS-West     Contential US     Full GOES-East

Jacksonville, FL,