From the forecast discussion:
Our attention turns to
Hurricane Hilary and it`s potential
impacts on Southern California Saturday through Monday.
Hurricane
Hilary is expected to rapidly intensify as it moves northward up
Baja California, then weaken as it hits colder waters near
northern Baja. The exact track and intensity of Hilary once it
moves northward towards Southern California remains uncertain at
this time.
Regardless of the exact track and intensity of Hilary, which
could continue to change in the coming days, it will bring a
substantial
surge in
moisture into Southern California, with heavy
rainfall and a high potential for
flash flooding, especially for
the mountains and deserts. A
Flood Watch has been issued for all
areas Saturday through Monday.
Current forecast
rainfall estimates Saturday through Monday:
Coast: 2 to 2.50 inches
Valleys: 2.50 to 3 inches
Mojave Desert: 3 to 4.50 inches
San Bernardino County
Mtns: 4 to 6 inches, locally up to 8 inches
on the eastern slopes
Riverside and San Diego County
Mtns: 4 to 8 inches, locally up to
10 inches on the eastern slopes
Lower Deserts: 4 to 6 inches
In addition to the
rainfall and flooding threat, another concern
is the potential for strong east winds Sunday and Monday. The wind
threat will be more dependent on the track of Hilary. Should
Hilary have a more westerly track, the wind threat would
likely
be greater, and if the track is more easterly, the threat would be
less.
The combination of heavy
rainfall, the potential for
flash
flooding, and strong winds could make this a very high impact
event for Southern California. Please stay up to date on the
latest forecasts through the National
Hurricane Center
(
nhc.
noaa.gov) and
NWS San Diego at weather.gov/sandiego.