Local NWS, which is really good, just updated its forecast.
Saturday
A chance of rain between 9am and 2pm, then showers likely after 2pm. Mostly cloudy, with a high near 64. Northeast wind 6 to 8 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Below is their updated detailed discussion.
&
.SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/...
As of 254 PM Thursday: Any time you throw a potential tropical
cyclone into the mix...the fcst is put into a state of flux...and
that is the case for this weekend. The operational GFS and ECMWF
are in relatively good agreement with the official track fcst from
NHC for the Gulf system, which lends enough confidence to make some
substantial changes starting Saturday. It still looks like the
leading edge of any precip shield will not reach SC by daybreak
Saturday, so the Friday night period will stay dry. However, the
guidance shows a steady progression of the precip shield on the
leading edge of the system moving northeast across the fcst area
on Saturday such that all our area stands a good chance of seeing
rain by sunset Saturday. Precip prob has been raised by blending
in the very high probs seen in the model blends. Temps are trending
cooler, so the day now looks cool, breezy, and wet. The track takes
the center of the storm, such that it will be having already most
likely made a transition to extratropical, past to the southeast
Saturday night. The storm will be ragged and the wind field on the
NW side is likely not to be of much significance as it currently
stands. The precip should start to cut off from the southwest by
daybreak Sunday, so we also have substantial changes with precip
prob on the back end. Latest thinking is that we should be able
to salvage Sunday afternoon with clearing sky and dry air coming
back from the NW as high pressure builds in. Precip amounts will
be enough to be beneficial and most likely not enough to cause
any problems, but this could change if the path of the system
shifts leftward.