Sunrise 6:18 AM   Sunset 8:13 PM Moonrise 12:07 PM   Moonset 1:17 AM

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AMZ330 Charleston Harbor- 311 Pm Edt Wed May 15 2024
.small craft advisory in effect until 8 pm edt this evening - .
Tonight - SW winds 15 to 20 kt with gusts to 25 kt this evening, becoming W 10 kt after midnight. A chance of showers and tstms early this evening, then a slight chance of showers and tstms late this evening. Thu - NW winds 5 to 10 kt, becoming sw in the afternoon. Thu night - S winds 5 to 10 kt. Fri - S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Fri night - S winds 10 to 15 kt. A slight chance of tstms. A slight chance of showers in the evening, then a chance of showers after midnight. Sat - SW winds 10 to 15 kt with gusts to 20 kt. Showers likely. A slight chance of tstms in the morning, then a chance of tstms in the afternoon. Sat night - SW winds 10 to 15 kt. Showers likely with a chance of tstms. Sun - W winds 10 to 15 kt. A chance of showers and tstms. Sun night - NW winds 10 kt. A slight chance of showers and tstms. Mon - N winds 10 kt. Mon night - NE winds 5 to 10 kt.
winds and waves higher in and near tstms.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 76 degrees.

AMZ300 311 Pm Edt Wed May 15 2024
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia - A cold front will move through late today, followed by high pressure into Friday. A storm system will affect the area this weekend, followed by high pressure from the north next week.

FXUS62 KCHS 151924 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 324 PM EDT Wed May 15 2024

SYNOPSIS
A cold front will move through late today, followed by high pressure into Friday. A storm system will affect the area this weekend, followed by high pressure from the north next week.

NEAR TERM /UNTIL 6 AM THURSDAY MORNING/
Late this afternoon through tonight: The main forecast challenge revolves around developing convection and its eastward track through the evening hours. The near storm environment is certainly supportive of a severe threat with MLCAPE around 2,000 J/kg, DCAPE of 1,000-1,200 J/kg, and effective shear around 40 kt. The main threat will be damaging wind gusts, but large hail will also be a possibility. We still expect that convective coverage will be isolated to scattered, and that the best threat area is still north of the Santee River where a Severe Thunderstorm Watch is in effect. Even being just outside the watch, a couple of severe storms will be possible until the activity shifts offshore later this evening. We should be completely done by around 10-11 pm and the rest of the overnight will be dry as the front passes offshore. Overnight lows are forecast to fall into the mid 60s inland (with a few low 60s possible), and upper 60s along the coast.

SHORT TERM /6 AM THURSDAY MORNING THROUGH SATURDAY/
A relatively progressive pattern will exist during the short term period. A shortwave ridge will move through on Thursday, yielding warm temps and dry weather. Highs expected to be in the mid to upper 80s.

A deepening southerly flow will bring an increase in moisture on Friday. A shortwave trough will lift northeast through the area late Friday, potentially bringing a few showers or tstms in from the west Friday afternoon.

A longwave upper trough will shift into the eastern United States Friday night and Saturday. A tropical airmass will overspread the area with PWATs approaching 2". A weak warm front will lift north through the area Friday night, then a potent shortwave will move through on Saturday. Fairly widespread showers and thunderstorms are expected during this period with many areas potentially receiving more than 1" of precipitation.

LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/
The upper trough axis will swing through on Sunday, potentially producing a few showers or tstms. Then, dry and warm weather expected as an upper ridge gradually builds from the west.

AVIATION /19Z WEDNESDAY THROUGH MONDAY/
The main issue for the 18z TAF period will be the thunderstorm potential near KCHS and KJZI this afternoon and early evening.
KSAV has considerably less thunderstorm chance, and there is no mention there. At KCHS and KJZI we have added in a VCTS as we still expect the main coverage area to be to the north. We will watch radar and amend as necessary. The chances for thunderstorms will end later this evening. Thursday morning, some guidance suggests that an area of stratus will develop to the north but is expected to remain north of KCHS. The forecast is VFR, but it will be something to keep an eye on with future TAF issuances.

Extended Aviation Outlook: Showers and thunderstorms could bring flight restrictions to all terminals Saturday and Saturday night as a low pressure system impacts the region.

MARINE
This evening and tonight: Current observations show that winds along the land/sea interface are quite gusty, especially along the Charleston County coast. Weatherflow observations at Shutes Folly and Fort Sumter in Charleston Harbor indicate that frequent gusts of 25-30 knots are occurring, and we are issuing a Small Craft Advisory through 8 pm. Otherwise, southwest winds will remain elevated into the evening, with 15-20 knots quite common. Through the late night, winds will turn more westerly as a front passes offshore, and speeds will mostly top out around 15 knots. Seas should mostly be in the 2- 4 ft range, though up to 5 ft in the outer Georgia waters and the Charleston County waters. Also, isolated thunderstorms could pass through Charleston Habor and the Charleston County waters through the late evening. It isn't out of the question that these storms could produce gusty winds and some hail.

Thursday through Monday: Conditions through the period are expected to remain below Small Craft Advisory criteria. High pressure will build in at the surface on Thursday, then a cold front pushes through on Saturday. High pressure returns early next week.

CHS WATCHES/WARNINGS/ADVISORIES
GA...None.
SC...None.
MARINE...Small Craft Advisory until 8 PM EDT this evening for AMZ330.

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Moores Landing
Click for Map
Wed -- 02:17 AM EDT     Moonset
Wed -- 02:31 AM EDT     4.82 feet High Tide
Wed -- 06:19 AM EDT     Sunrise
Wed -- 07:49 AM EDT     First Quarter
Wed -- 08:49 AM EDT     0.99 feet Low Tide
Wed -- 01:06 PM EDT     Moonrise
Wed -- 03:13 PM EDT     4.22 feet High Tide
Wed -- 08:11 PM EDT     Sunset
Wed -- 09:02 PM EDT     1.14 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Moores Landing, ICWW, Sewee Bay, South Carolina, Tide feet

Charleston Harbor Entrance
Click for Map
Wed -- 02:17 AM EDT     Moonset
Wed -- 02:36 AM EDT     -0.00 knots Slack
Wed -- 06:07 AM EDT     -1.63 knots Max Ebb
Wed -- 06:20 AM EDT     Sunrise
Wed -- 07:49 AM EDT     First Quarter
Wed -- 09:25 AM EDT     0.00 knots Slack
Wed -- 11:27 AM EDT     0.99 knots Max Flood
Wed -- 01:07 PM EDT     Moonrise
Wed -- 03:13 PM EDT     -0.00 knots Slack
Wed -- 06:36 PM EDT     -1.38 knots Max Ebb
Wed -- 08:11 PM EDT     Sunset
Wed -- 09:43 PM EDT     0.00 knots Slack
Wed -- 11:48 PM EDT     1.01 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION

Charleston Harbor Entrance, South Carolina Current, knots

Full Color Weather Map

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