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. Privacy and Cookie policy

AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 1224 Am Est Mon Dec 11 2023
.gale warning in effect until 3 am est early this morning...
Rest of tonight..NW winds 25 to 30 kt with gusts to 45 kt, diminishing to 20 kt with gusts to 25 kt late. Seas 4 to 6 ft. Showers likely, then a slight chance of showers late.
Mon..NW winds 15 to 20 kt with gusts to 25 kt, becoming N 10 kt in the afternoon. Seas 4 to 5 ft, subsiding to 3 to 4 ft in the afternoon.
Mon night..N winds 10 to 15 kt. Seas 2 to 3 ft.
Tue..NE winds 10 to 15 kt. Seas 3 to 4 ft.
Tue night..NE winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft.
Wed..NE winds 15 to 20 kt. Seas 4 to 5 ft.
Wed night..NE winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 4 to 6 ft.
Thu..NE winds 20 to 25 kt. Seas 6 to 8 ft.
Thu night..NE winds 20 to 25 kt. Seas 6 to 8 ft.
Fri..NE winds 20 kt. Seas 6 to 8 ft. A slight chance of showers.
Fri night..NE winds 15 to 20 kt. Seas 6 to 8 ft. A chance of showers.

AMZ300 1224 Am Est Mon Dec 11 2023
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A strong cold front will cross the area this evening, followed by high pressure through late this week.

FXUS62 KCHS 110314 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 1014 PM EST Sun Dec 10 2023

SYNOPSIS
A strong cold front will cross the area this evening, followed by high pressure through late this week.

NEAR TERM /UNTIL 6 AM MONDAY MORNING/
Late this evening: The cold front and associated line of showers is making its way across the forecast area and producing strong wind gusts this evening. Several observation sites have reported wind gusts in the 40-45 mph range, and we are issuing SPS's with the line to handle it. Rainfall will continue for several more hours, though most of it will be quite light. We should be rain-free by around 3-4 am and skies will begin to clear from the west as well. Winds will remain quite gusty for the next few hours, then diminish from the peak beginning in the early morning hours. No change to temperatures.

Lake Winds: A strong cold front will move across Lake Moultrie late this evening. As it does, winds will turn westerly and quickly increase, with wind gusts into the 35-40 knot range for a short period of time. A Lake Wind Advisory remains in effect through 1 am.

SHORT TERM /6 AM MONDAY MORNING THROUGH WEDNESDAY/
Monday: The strong cold front will be well offshore by sunrise Monday with strong post-frontal cold air advection (CAA) in progress. The intensity of the CAA will wane through the day with 850 hPa temperatures settling into the 2-5C range by afternoon. There will be somewhat of a weak downslope component in the lee of the southern Appalachians, but it will still be a chilly day despite full insolation. Highs will only reach within a degree or two of 55 area wide with early breezy conditions gradually diminishing as the day progresses. Sunday night will be a bit chilly under clear skies. The boundary layer may fully decouple across the interior while winds stay up a bit along the coast where the pressure gradient is progged to tighten a bit overnight in response to the center of the surface high bridging the Blue Ridge. Favored the cooler side of the guidance across the interior and closer to the guidance mean at the coast. Lows will range from around 30 well inland adjacent to the CSRA and Southern Midlands to the mid 40s along the beaches where northeast winds will have a bit more of a moderating influence.

Tuesday and Wednesday: High pressure will dominate through this period as a mostly zonal flow prevails aloft. A weak coastal trough will dry and form just offshore by Wednesday, but any associated shower activity should remain well offshore. While the main low-level moisture channel will be directed into Northeast Florida, there could be a gradual increase in cloud cover with some degree of marine-based stratocumulus pushing inland, mainly across the coastal counties (especially coastal Georgia) coupled with thickening cirrus aloft. Temperatures will begin to slowly moderate both days with highs warming into the mid-upper 50s Tuesday with upper 50s/lower 60s Wednesday. Lows Wednesday morning will range from around freezing well inland to the upper 40s/near 50 at the beaches.

LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/
Quiet conditions will prevail for much of the week. The forecast becomes a bit more uncertain Friday into Saturday some data suggesting a storm system will develop over the Gulf of Mexico and impact parts of the Southeast U.S. coast during the upcoming weekend. The forecast was closely aligned with the 10/13z NBM for now until trends can become better established.

AVIATION /03Z MONDAY THROUGH FRIDAY/
The 00z TAF period will start out with VFR conditions and no rain at KCHS, KJZI, and KSAV. However, a cold front is situated just to the west, and it will move through the TAF sites in the 03-05z time period. The front will bring an area of showers as well as a quick increase in wind speed. Gusts into the 35-40 knot range can be expected. Also, a period of MVFR (or possibly IFR) ceilings is anticipated. VFR conditions should return by the 08-10z time range and then prevail through the remainder of the TAF period.

Extended Aviation Outlook: There are no concerns at this time.

MARINE
Rest of tonight: A line of showers along and ahead of the approaching cold front is producing wind gusts of around 40 knots across land areas. We should see some higher gusts across the coastal waters, and gusts up to 45 knots will be possible for a narrow window of time late this evening through the early morning hours. We have expanded the Gale Warning to include Charleston Harbor as well to account for these stronger gusts.

Monday through Friday: Conditions will rapidly improve across the marine area Monday as high pressure builds in from the west and post- frontal CAA wanes. A modest northeast flow event will develop by mid-week as the pressure gradient tightens in response to sprawling high pressure building into North Carolina and the formation of a subtle coastal trough just offshore.
Both winds and seas will respond with a return to Small Craft Advisory levels possibly as early as Wednesday which will likely linger into Friday.

EQUIPMENT
KCLX remains operational, but level 2 data is not being distributed to external users due to an internal hardware failure. We are still awaiting the arrival of new parts to resolve this problem. Until then, level 2 data will not be available. Radar data is available for all connected AWIPS users. Level 3 data is also available for some external users.

CHS WATCHES/WARNINGS/ADVISORIES
GA...None.
SC...Lake Wind Advisory until 1 AM EST Monday for SCZ045.
MARINE...Gale Warning until 1 AM EST Monday for AMZ330.
Gale Warning until 3 AM EST Monday for AMZ350-352-354.
Gale Warning until 6 AM EST Monday for AMZ374.

toggle option: (graph/table)

Purrysburg Landing
Click for Map
Sun -- 02:58 AM EST     0.25 feet Low Tide
Sun -- 04:50 AM EST     Moonrise
Sun -- 07:14 AM EST     Sunrise
Sun -- 07:59 AM EST     3.09 feet High Tide
Sun -- 03:26 PM EST     Moonset
Sun -- 03:47 PM EST     0.30 feet Low Tide
Sun -- 05:19 PM EST     Sunset
Sun -- 08:07 PM EST     2.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Purrysburg Landing, Savannah River, South Carolina, Tide feet

Savannah River Entrance
Click for Map
Sun -- 12:12 AM EST     0.00 knots Slack
Sun -- 02:59 AM EST     2.06 knots Max Flood
Sun -- 04:48 AM EST     Moonrise
Sun -- 06:42 AM EST     -0.00 knots Slack
Sun -- 07:13 AM EST     Sunrise
Sun -- 10:00 AM EST     -1.97 knots Max Ebb
Sun -- 01:09 PM EST     0.00 knots Slack
Sun -- 03:26 PM EST     Moonset
Sun -- 03:36 PM EST     1.84 knots Max Flood
Sun -- 05:19 PM EST     Sunset
Sun -- 07:00 PM EST     -0.00 knots Slack
Sun -- 09:41 PM EST     -1.71 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION

Savannah River Entrance, Georgia Current, knots

Full Color Weather Map

Link to Loop


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

Charleston, SC,