Latest from NWS Sterling
SHORT TERM /TUESDAY THROUGH WEDNESDAY NIGHT/...
Rain showers and the isolated thunderstorm threat will continue and
likely spread north and east during the day Tuesday as the low
pressure system moves into the western Carolinas and becomes nearly
stationary. Rain showers and isolated thunder could linger Tuesday
night through midweek, including the Wednesday night timeframe.
Average rain amounts Monday night through Wednesday night could
average one half to one inch across the northern 2/3rds of the
region, while the southern 1/3rd, including along and east of the
Blue Ridge could encounter rain amounts in the one and a half to as
much as 3 inches of rain. Local amounts could reach up to 5 or 6
inches of rain depending on the model and the track and movement of
the low pressure system. A lot may change within the forecast as the
forecast track becomes more apparent. Continue to monitor our
forecast locally as well as the National Hurricane Center.
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.LONG TERM /THURSDAY THROUGH SUNDAY/...
Uncertainty remains high for the extended period due to a blocky
upper level pattern. For Thursday and Friday, any remnant of the
previous coastal low will be weakened if not dissipated, and the
mid/upper low may also weaken and open into a trough. However,
secondary low pressure development could take place off the coast.
Shower chances will persist through this period thanks to the upper
trough, but may be comparably lower Friday as forcing weakens and
the trough axis perhaps aligning just east of the area. Temperatures
will be near normal.
For Saturday and Sunday, ridging will amplify northwest of the area
while a trough moves across the Canadian Maritimes. This combination
may result in another upper low closing off over the southeast US.
At the surface, a backdoor front will push toward the region, but
lose definition as it encounters a staunch coastal front along the
southeast coast. Strong high pressure over New England may result in
a good southward push however. It`s still unclear whether drier air
will be able to work into the area behind the front, or if clouds
and continued light rain chances persist. Temperatures will trend
below normal however.