Scientific Forecaster Discussion
fxus66 ksgx 221048
Area forecast discussion
National Weather Service San Diego California
348 am PDT sun Oct 22 2017
high pressure aloft and surface high pressure over the Great Basin
will bring areas of gusty Santa Ana winds near coastal foothills
and below passes and canyons...very low humidity...and hot
weather into Wednesday. The most extreme combination of low
humidity... stronger and more widespread winds...and heat is
expected on Monday and Tuesday. Winds will weaken Thursday with
cooling spreading inland for Thursday into next weekend. Some low
clouds could return near the coast late in the week.
Discussion...for extreme southwestern California including Orange...
San Diego...western Riverside and southwestern San Bernardino
Gusty Santa Ana winds have continued overnight near the coastal
foothills and below passes and canyons with the stronger winds
below the Cajon Pass...near the coastal slopes of the Santa Ana
Mountains and near some of the peaks in the San Diego County
mountains with gusts exceeding 40 mph. The winds will become
gradually stronger and more widespread for late tonight into
Tuesday with gusts to 55 mph late Monday into Tuesday with
isolated gusts to 65 mph. Winds similar to today could continue
The warming that began Saturday will continue today into Monday
and Tuesday. Monday and Tuesday are expected to be the hottest
days with with high temperatures for inland coastal areas into the
western valleys exceeding 100. Not quite as hot on Wednesday with
a cooling trend taking high temperatures to near to a little
above average for Friday and Saturday. Some stratus could return
near the coast late in the week.
220810z...coast/valleys...clear with unrestricted vis through today.
Areas of northeast winds will produce MDT-strong up/downdrafts and
low level wind shear after 18z. This could impact kont, ksbd, kral and ksna at
times, along with northeast winds 15-25 kt gusting 30-40 kt. Winds
could strengthen Monday morning.
Mountain/deserts...areas of northeast winds will continue through
Monday. Winds will be 15-30 kt gusting 35-45 kt with strongest winds
near ridges and through passes/canyons.
no hazardous marine weather is expected through next Thursday.
a short-period northwest swell from 290 degrees and a long-period
northwest swell from 295 degrees will continue to bring elevated
surf of 3-6 ft and strong rip currents. Highest surf will be at west-
facing beaches of San Diego County. Although surf lowers somewhat
today, rip currents will still be a concern. A beach hazards
statement is in effect through this afternoon.
gusty northeast will become gradually stronger and more widespread
into Tuesday. Winds similar to those of today could continue into
Wednesday. Lowest daytime humidity below 10 percent will continue
into Wednesday with poorest overnight recovery near the coastal
foothills. The most extreme combination of low humidity...stronger
winds...and heat is expected for Monday and Tuesday. Critical
fire weather conditions could continue into Wednesday with the
combination of wind...heat...and humidity similar to today. Weaker
winds are expected for Thursday through Saturday with cooling and
some recovery in humidity spreading inland.
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.
California...red flag warning from 6 am this morning to 6 PM PDT Tuesday for
Orange County coastal areas-Orange County inland areas-
Riverside County mountains-including the San Jacinto Ranger
district of the San Bernardino National Forest-San Diego
County inland valleys-San Diego County mountains-including
the Palomar and Descanso Ranger districts of the Cleveland
National Forest-San Gorgonio Pass near Banning.
Excessive heat warning from 10 am Monday to 8 PM PDT Tuesday for
Orange County coastal areas-Orange County inland areas-San
Bernardino and Riverside County valleys-the inland Empire-
San Diego County coastal areas-San Diego County valleys.
Red flag warning until 6 PM PDT Tuesday for San Bernardino
County mountains-including the mountain top and front
country Ranger districts of the San Bernardino National
Forest-San Bernardino and Riverside County valleys -the
inland Empire-Santa Ana Mountains-including the Trabuco
Ranger district of the Cleveland National Forest.
Beach hazards statement through this evening for Orange County
coastal areas-San Diego County coastal areas.