Charleston Update:
Hurricane Isaias will have at least some impacts on the area
later Sunday through Monday. The 5 AM advisory does not make any
significant west or east shift in the track. However the wind
radii on the western side of the system have been decreased
substantially in response to growing model consensus in a
compact cyclone. The tropical storm force winds are now forecast
to remain just off the coast. The global models continue to show
considerable spread in track and speed, so confidence remains
relatively low in the exact impacts Isaias may have on our area.
At a minimum, coastal hazards such as rip currents, high surf,
coastal flooding, and erosion will be possible.
The precipitation forecast is quite tricky due to the
uncertainty in the track and size of Isaias as it makes its
closest approach. Some guidance shows a deep tropical airmass
overspreading eastern SC, accompanied by numerous to widespread
showers, while others maintain a very compact system with the
brunt of the precip remaining offshore. There are hints that
drier air will advect into southeast GA and inland SC,
potentially resulting in minimal precipitation in those areas.
Hurricane Isaias will have at least some impacts on the area
later Sunday through Monday. The 5 AM advisory does not make any
significant west or east shift in the track. However the wind
radii on the western side of the system have been decreased
substantially in response to growing model consensus in a
compact cyclone. The tropical storm force winds are now forecast
to remain just off the coast. The global models continue to show
considerable spread in track and speed, so confidence remains
relatively low in the exact impacts Isaias may have on our area.
At a minimum, coastal hazards such as rip currents, high surf,
coastal flooding, and erosion will be possible.
The precipitation forecast is quite tricky due to the
uncertainty in the track and size of Isaias as it makes its
closest approach. Some guidance shows a deep tropical airmass
overspreading eastern SC, accompanied by numerous to widespread
showers, while others maintain a very compact system with the
brunt of the precip remaining offshore. There are hints that
drier air will advect into southeast GA and inland SC,
potentially resulting in minimal precipitation in those areas.