872
FXUS66 KLOX 170120
AFDLOX

Area Forecast Discussion...UPDATED
National Weather Service Los Angeles/Oxnard CA
620 PM PDT Mon Jun 16 2025

.SYNOPSIS...16/113 PM.

High pressure over the region will maintain very warm temperatures
through much of the coming week, especially away from the coast
and across the interior portions of the area. Gusty northerly
winds will develop once again tonight across southern Santa
Barbara County and through the Interstate 5 Corridor. A gradual
cooling trend will develop late in the week.

&&

.SHORT TERM (TDY-THU)...16/100 PM.

Overall a warm stretch of weather will continue through at least
mid week as a ridge of high pressure sits over the West Coast.
Temperatures trended a little cooler today in most areas as
onshore flow to the east increased which created an earlier sea
breeze. The main exception to that is southern Santa Barbara
County where onshore flow to the north has decreased and has
actually turned offshore. Thus, temperatures there are trending
slightly warmer. And more importantly, the stage is being set for
a moderate Sundowner event tonight and again tomorrow night with
winds gusting to 50 mph through the canyons and passes from late
afternoon through early morning creating some fire weather
concerns. Similar concerns also for the I5 corridor, the Antelope
Valley, and interior SLO County.

Across the region, highs Tue/Wed are expected to be within 3 or
so degrees of today in most areas, except trending more on the
higher side of that across the interior portions of SLO County and
the Antelope Valley as well as southern SB County due to sundowner
winds. For the LA/Ventura County valleys looking for highs in the
90s to around 102. And Downtown LA around 90.

A trough will begin to replace the ridge Thursday that will start
a cooling trend that will carry into the weekend.

.LONG TERM (FRI-MON)...16/110 PM.

A trough of low pressure will continue across the West Coast
Friday and through the weekend and even into early next week
which means much cooler temperatures and increasing marine layer
stratus. High temperatures will drop to 3-6 degrees below normal
area-wide through early next week with a steady dose of night and
morning marine layer that may not fully clear some coastal areas.
Gusty onshore winds will continue across the Antelope Valley each
afternoon and evening.

&&

.AVIATION...17/0118Z.

Around 00Z, the marine layer depth was around 800 feet deep at
KLAX. The top of the marine inversion was around 2100 feet with a
temperature of 27 degrees Celsius. There was another inversion up
to around 3500 feet.

High confidence in the current forecast, except for moderate
confidence in the current for Central Coast and Los Angeles County
coastal terminals. There is a moderate to high chance of LIFR to
IFR conditions between 08Z and 16Z. VFR conditions should
redevelop by 16Z.

KLAX...There is a 50 percent chance of IFR conditions as early as
11Z, or as late as 16Z. Otherwise, VFR conditions are likely to
persist. Any east winds will be less than 7 knots.

KBUR...VFR conditions are expected through the period. No adverse
wind conditions are expected at this time.

&&

.MARINE...16/142 PM.

High confidence in gusty Small Craft Advisory (SCA) level
northwest winds across the Outer Waters and Inner Waters along the
Central coast through the week. A Gale Warning is in effect for
the Outer Waters through Tuesday night, and for the northern
Inner Waters through this evening. For Tuesday afternoon through
evening, there is a 40% chance of Gale force winds again in the
northern Inner Waters. Seas will hover around 10 feet through the
week, increasing to 10 feet this weekend. Gale force winds will
be possible again by the end of the week.

Gusty SCA winds for western and southern portions of the Santa
Barbara Channel in the afternoon and evening hours are likely
through Tuesday, with lower confidence thereafter. A Gale Watch is
in place for Tuesday afternoon through evening, with Gale force
winds focused across the western portions and away from Santa
Barbara, Ventura, and Channel Islands Harbors. Confidence in the
Gale force winds being widespread enough to warrant a Gale Warning
has trended lower since this morning.

Moderate confidence in conditions remaining below advisory levels
in the Inner Waters off the Los Angeles and Orange County coasts
through the week. However, localized W to NW SCA level wind gusts
may occur in the afternoon and evening hours near Malibu and
through portions of the San Pedro Channel through Tuesday.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...Wind Advisory remains in effect until 9 AM PDT Tuesday for
      zones 349-351. (See LAXNPWLOX).
     Wind Advisory in effect until 9 AM PDT Tuesday for zone 352. (See LAXNPWLOX).
PZ...Gale Warning in effect until 9 PM PDT this evening for zone
      645. (See LAXMWWLOX).
     Small Craft Advisory in effect until noon PDT Tuesday for
      zone 650. (See LAXMWWLOX).
     Gale Watch in effect from Tuesday afternoon through late
      Tuesday night for zone 650. (See LAXMWWLOX).
     Gale Warning in effect until 3 AM PDT Wednesday for zones
      670-673-676. (See LAXMWWLOX).

&&

$$

PUBLIC...MW
AVIATION...Hall
MARINE...Lewis
SYNOPSIS...Ciliberti

weather.gov/losangeles

Experimental Graphical Hazardous Weather Outlook at:
https://www.weather.gov/erh/ghwo?wfo=lox