Sunrise 6:29 AM   Sunset 8:03 PM Moonrise 2:12 AM   Moonset 1:06 PM

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AMZ330 Charleston Harbor- 300 Pm Edt Thu May 2 2024
Tonight - SE winds 10 to 15 kt with gusts to 20 kt early, diminishing to 5 kt. Areas of fog late with patchy dense fog. Vsby locally 1/4 nm or less.Fri - SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts to 20 kt in the afternoon. Areas of fog in the morning with patchy dense fog. Vsby locally 1/4 nm or less in the morning. Fri night - SE winds 10 to 15 kt. Sat - SE winds 10 to 15 kt. Sat night - SE winds 10 to 15 kt. A slight chance of showers and tstms after midnight. Sun - S winds 10 to 15 kt. A chance of showers and tstms. Sun night - S winds 10 to 15 kt with gusts to 20 kt. A slight chance of showers and tstms in the evening. Mon - S winds 10 to 15 kt. A slight chance of showers and tstms.Mon night - S winds 10 to 15 kt. Tue - SW winds 10 to 15 kt. Tue night - SW winds 15 kt.
winds and waves higher in and near tstms.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 73 degrees.

AMZ300 300 Pm Edt Thu May 2 2024
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia - Atlantic high pressure will remain across the southeast through much of next week.

FXUS62 KCHS 021914 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 314 PM EDT Thu May 2 2024

SYNOPSIS
Atlantic high pressure will remain across the Southeast through much of next week.

NEAR TERM /THROUGH TONIGHT/
Tonight: A few transient, light sprinkles have been observed on KCLX this afternoon along a well defined pure sea breeze circulation. No measurable rainfall has been observed so far and none is expected. Gridded pops were still held below mentionable thresholds. The sea breeze will continue to march inland for the rest of the afternoon, likely clearing the far inland areas by mid-evening.

The main forecast issue for the overnight is trying to pin down the extent and location of fog and stratus. The airmass as changed little in the past 24 hours and with the synoptic pattern nearly identical to last night, conditions appear favorable for another round of dense fog late this evening into the morning hours Friday. Interestingly, the 12z guidance members are giving number of possible fog scenarios ranging from widespread dense fog just about everywhere to only patchy, shallow ground fog with no major reductions in visibility.

The forecast favors the foggier solutions with NBM probabilities for dense fog ranging from roughly 50-80%, highest over Southeast South Carolina. This is where the afternoon dewpoint footprint is the highest and the best overlapping of the lowest RAP/NAM/H3R 1000 hPa condensation pressure deficits are progged. Areas fog with patchy dense fog areal qualifiers were highlighted for all but interior Southeast Georgia from roughly Reidsville-Millen where fog parameters will not be as ideal. It is very possible another Dense Fog Advisory may be needed for some areas later tonight and this possibility is well outlined in the Hazardous Weather Outlook. Lows tonight will range from the mid 60s well inland to around 70 at the beaches and Downtown Charleston.

SHORT TERM /FRIDAY THROUGH SUNDAY/
Mid level ridge axis transitions off the Southeast coast Friday with shortwave energy to move through the region over the weekend. High pressure will remain the primary feature at the surface. A few showers and thunderstorms could sneak into inland areas Friday, but convection should be a bit more active over the weekend. Coverage will be highest in the daytime when instability is maximized, but with some upper forcing in play activity will be possible overnight as well.

High temperatures generally peak in the mid to upper 80s. Lows only drop to the mid to upper 70s.

LONG TERM /SUNDAY NIGHT THROUGH WEDNESDAY/
Atlantic high pressure will persist during the early to middle of next week. Convection looks to be most active early in the period, then the chances for showers/thunderstorms decrease towards mid week as ridge rebuilds overhead. Temperatures will also be creeping up, possibly approaching record levels by Wednesday/Thursday.

AVIATION /18Z THURSDAY THROUGH TUESDAY/
02/18z TAF Discussion: KCHS/KJZI/KSAV: The main concern is on fog/stratus overnight into early Friday morning. 12z guidance is trending lower with both vsbys and cigs later tonight as a warm/moist airmass remains in place. Synoptically, the pattern will be similar to last night, so guidance is likely trending in the right direction. The 18z TAFs for all three terminals will highlight conditions dropping below each airfield's respective alternate minimums by 08z with conditions occasionally dropping right to or just below airfield minimums in the 09-13z period. It is very possible all terminals may become completely fogged in early Friday with vsbys 1/4SM and VV001-002. The need to introduce lower conditions will be reevaluated with the 00z TAF cycle, but a lower trend has been initiated with this TAF cycle. VFR should quickly return once fog/stratus mix out Friday morning, roughly in the 13-14z period.

Extended Aviation Outlook: Flight restrictions possible in overnight/early morning fog and stratus. Isolated to scattered showers and thunderstorms are possible Saturday through Monday.

MARINE
Tonight: East to southeast winds will prevail tonight with high pressure centered well offshore. Fog could become an issue in the Charleston Harbor as fog oozes into the harbor from nearby areas. The fog could become locally dense with vsbys <1NM. A Marine Dense Fog Advisory could be needed at some point overnight. Fog could impact harbor operations in the Charleston Harbor and Port of Savannah. The fog could not be too much of a concern over the Atlantic coastal waters given the onshore flow regime that is in place. This should limit the fog to areas inland from the beaches. Wind speeds will average less than 10 kt with seas 1-2 ft.

Friday through Tuesday: No marine concerns. Atlantic high pressure will maintain rather benign conditions over the marine area. Winds are generally no higher than 10-15 kt with seas 2-3 ft.

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

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Charleston
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Thu -- 03:12 AM EDT     Moonrise
Thu -- 03:15 AM EDT     5.47 feet High Tide
Thu -- 06:31 AM EDT     Sunrise
Thu -- 09:42 AM EDT     0.42 feet Low Tide
Thu -- 02:06 PM EDT     Moonset
Thu -- 03:46 PM EDT     5.03 feet High Tide
Thu -- 08:02 PM EDT     Sunset
Thu -- 10:01 PM EDT     0.53 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Charleston, South Carolina, Tide feet

Charleston Harbor Entrance
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Thu -- 12:03 AM EDT     1.46 knots Max Flood
Thu -- 03:12 AM EDT     Moonrise
Thu -- 03:46 AM EDT     -0.00 knots Slack
Thu -- 06:30 AM EDT     Sunrise
Thu -- 07:11 AM EDT     -2.22 knots Max Ebb
Thu -- 10:18 AM EDT     0.00 knots Slack
Thu -- 12:35 PM EDT     1.46 knots Max Flood
Thu -- 02:06 PM EDT     Moonset
Thu -- 04:05 PM EDT     -0.00 knots Slack
Thu -- 07:31 PM EDT     -1.96 knots Max Ebb
Thu -- 08:02 PM EDT     Sunset
Thu -- 10:35 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

Charleston Harbor Entrance, South Carolina Current, knots

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Charleston, SC,