Area Forecast Discussion
Issued by NWS Los Angeles, CA

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000
FXUS66 KLOX 231300
AFDLOX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
600 AM PDT Sun Apr 23 2017

.SYNOPSIS...
Dry northwest flow will bring breezy conditions to the area for
most of the week. Daytime temperatures will be slightly above
normal this week.

&&

.SHORT TERM...(TDY-TUE)

The eddy did not spin up as forecast and as a result there are not
many low clouds south of Point Conception. NW flow has created
some low clouds for the Central Coast and the Santa Ynez vly.
Otherwise skies will be mostly sunny and max temps will be a
couple of degrees above normal but quite a few degrees cooler than
it was yesterday. Strong NW flow over the Central Coast will
create advisory level gusts this afternoon and evening. These
winds will funnel through canyons of the Santa Ynez range and
there will be advisory level gusts for the western half of the
Santa Ynez range and the SBA south coast.

Strong NW flow will continue for Monday and Tuesday. There will
likely be advisory level gusts over the SBA/VTA/LA mtns...the
Antelope Vly and the SBA south coast. It will be dry and mostly
clear or at worst partly cloudy with the notable exception of the
North Slopes near the Kern county line on Monday night and Tuesday
morning where N flow will pile up clouds and create a slight chc
of a shower. Max temps will hover right around seasonal normals

.LONG TERM...(WED-SAT)

An upper level trough will dive southeastward through the Great
Basin late Tuesday and will maintain the northwest flow across
Southwest California. Wind advisory level gusts will continue
through the period for the northwest wind prone areas, especially
across southern Santa Barbara county, the Central Coast, and the
mountains. The northerly flow will bring some downslope warming
to coastal/valley areas during this period, with some areas
climbing into the 80s.

Better offshore flow is forecast for next weekend. It will be
breezy and max temps will be 5 to 10 degrees above normal.

&&

.AVIATION...23/1230Z.

At 1130Z, there was a surface based inversion at KLAX.
The top of the inversion was around 2500 feet with a temperature
of 20 degrees Celsius.

Widespread IFR to LIFR cigs will continue on the Central Coast and
in the Santa Ynez Valley through mid to late morning, then skies
will become mostly clear. Otherwise, expect VFR conds today.
Expect stratus on the Central Coast, in the Santa Ynez Valley
and in coastal sections of L.A. and VTU Counties tonight, with
conds expected to be in the low MVFR or high IFR category.

Gusty NW winds will affect the Central Coast this afternoon and
evening, and the Santa Ynez Range and adjacent south coast of
SBA County late this afternoon through late tonight. There will be
some LLWS and mdt UDDF through and below passes and canyons.

KLAX...Moderate to high confidence in the 12Z TAF with VFR conds
thru at least midnight, then some MVFR cigs are expected. There is
a 10-20% chance of IFR cigs between 14z and 17z this morning.
There is a 20% chance that cigs will be in the IFR category
tonight/Mon morning.

KBUR...High confidence in the 12Z TAF with VFR conds expected
through the period.

&&

.MARINE...23/300 AM.

Moderate to high confidence in gale force winds across the outer
waters from this morning through at least late Mon night. There
may be a brief lull in the winds Tue, then gale force winds are
possible again late Tue through Thu.

Across the inner waters, SCA conds are likely through late
tonight, and rather likely during the afternoon and evening hours
Mon through Thu. Winds could approach gale force at times across
the inner waters much of this week. Gusty winds and choppy steep
seas will make boating rather hazardous this week.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement in effect through Monday evening for
      zones 34-35-40-41-87. (See LAXCFWLOX).
     Wind Advisory in effect from noon today to 3 AM PDT Monday
      for zones 34-35. (See LAXNPWLOX).
     Wind Advisory in effect until 3 AM PDT Tuesday for zones
      39-52. (See LAXNPWLOX).
PZ...Small Craft Advisory in effect until 3 AM PDT Monday for
      zones 645-650. (See LAXMWWLOX).
     Gale Warning in effect until 3 AM PDT Tuesday for zones
      670-673-676. (See LAXMWWLOX).

&&

.HAZARD POTENTIAL OUTLOOK...(TUE-SAT)
Very gusty north to northwest winds are expected across southern
Santa Barbara County, the Central Coast, the I-5 corridor, and
the Antelope Valley. Advisory level winds expected at times and
possibly exceeding warning levels, especially in the I-5 corridor
and southern SB County Wednesday and Thursday.

&&

$$

PUBLIC...Rorke
AVIATION...DB
MARINE...DB
SYNOPSIS...ASR

weather.gov/losangeles



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