Marine Weather Net

Charleston Harbor Marine Forecast


5 - 10


5 - 10





The Marine Weather Forecast In Detail:
AMZ330 Forecast Issued: 647 AM EDT Sun Sep 22 2019

Today...E Winds 5 To 10 Kt.
Tonight...Se Winds 5 To 10 Kt, Diminishing To 5 Kt After Midnight.
Mon...Variable Winds 5 Kt.
Mon Night...Sw Winds 5 Kt.
Tue...Sw Winds 5 To 10 Kt.
Tue Night...S Winds 5 To 10 Kt.
Wed...S Winds 5 To 10 Kt.
Wed Night...S Winds 10 Kt.
Thu...Sw Winds 10 Kt.
Thu Night...S Winds 5 To 10 Kt. Unless Otherwise Noted, Waves 1 Foot Or Less. Charleston Harbor Water Temperature 80 Degrees.
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Area Forecast Discussion
National Weather Service Charleston SC
703am EDT Sunday September 22 2019

High pressure will prevail early this week. A weak cold front will move into the area Tuesday, then linger through late week as tropical cyclone Jerry passes by well offshore.

.NEAR TERM Through Tonight
As of 655 AM: Recent observations across the inland SC counties have fallen well into the mid 50s. I will update the forecast to populate the hourly temperatures with the observed temperatures, adjusting the warming rate early this morning.

As of 310 AM: Broad high pressure will remain over forecast area today and tonight. Latest water vapor images indicate dry air across the Deep South. Given the deep dry air, I will forecast mostly sunny to sunny conditions across the region today. Given full sun and mild llevel thicknesses, high temperatures are forecast to peak at or a degree above values observed on Saturday. By mid this afternoon, temperatures are expected to range from around 90 across inland GA to the mid 80s along the coast. This evening, winds are forecast to become calm by mid to late evening, with calm conditions expected through the rest of the night. Temperatures should cool to the low 60s inland to near 70 along the beaches.

Short Term - Monday Through Tuesday
High confidence this period. A weak cold front looks to push into the area Tuesday before stalling. Meanwhile, an upper trough will be pushing offshore helping to keep tropical cyclone Jerry well off the coast. Not expecting any appreciable rain chances given the dry air and lack of significant instability/forcing. Temperatures will remain above normal.

Long Term - Tuesday Night Through Saturday
Moderate confidence this period. No significant concerns with high pressure generally prevailing. Given the lack of strong instability/forcing we aren't expecting much rain. Temperatures will remain the biggest story, staying above normal through the period, with heat indices likely peaking in the mid to upper 90s inland Thursday and Friday (especially in GA).

High pressure will remain across the marine zones today into tonight. East winds should favor speeds around 10kts today, decrease to 5 kts or less by the pre-dawn hours Monday. Wave heigheights are forecast to gradually subside through the near term, ranging between 2-5 ft by late tonight.

Monday through Friday: No significant concerns as a weak cold front moves into the area Tuesday and stalls. The resulting weak pressure gradient will lead to winds and seas staying below Advisory levels despite increasing swells from tropical cyclone Jerry moving north well east of the local waters.

Rip Currents
An elevated risk for rip currents will likely continue much of this week.

Tides / Coastal Flooding
High tides could produce minor to moderate coastal flooding mid to late week.

NOAA Charleston SC Office: Watches - Warnings - Advisories
GA...None. SC...None. MARINE...None.