Piru, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

131
FXUS66 KLOX 082112
AFDLOX

Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA
212 PM PDT Tue Apr 8 2025

.SYNOPSIS...08/923 AM.

High pressure aloft building over the region will bring a gradual
warming trend through Thursday. Daytime high temperatures will be
well above normal temperatures away from the coast for late week.
Night through morning low clouds and fog will remain confined to
the coast through the week until onshore flow returns for cooler
temperatures this weekend into next week.

&&

.SHORT TERM (TDY-FRI)...08/156 PM.

High pressure is starting to amplify along the west coast which
will be the beginning of our mini heat wave for inland areas.
Already seeing early signs of warming today in the foothills and
mountains and gradients trending weaker. The ridge will peak
Thu/Fri which will also be the warmest days with highs in the mid
90s in the western San Fernando Valley (near record levels) and
upper 80s to lower 90s elsewhere in the valleys (including
interior parts of SLO and SB Counties). This is 10-15 degrees
above normal. Coastal areas will be warmer than normal as well but
more to the tune of 1-5 degrees above normal with patches of
dense fog possible near the beaches. Currently not planning to
issue any heat risk hazards for this event as daytime
temperatures, while warm, are not quite warm enough in most areas,
and overnight and early morning temperatures are in the 50s which
will provide plenty of recovery.

Some gusty north winds will develop again this evening across
southwest Santa Barbara County and parts of the I5 corridor.

.LONG TERM (SAT-TUE)...08/209 PM.

High pressure will begin to weaken Friday as the next trough moves
into the eastern Pacific and West Coast. It`s very slow moving and
will impact our weather with much cooler temperatures beginning
Saturday and continuing well into next week. Models still
projecting a LAX-DAG onshore flow of close to 9mb on Monday, so
expect increasing west to southwest winds across the mountains and
deserts, a deepening marine layer that likely will spread into at
least some of the valleys, and afternoon temperatures dropping to
the 60s for coastal areas and only low to mid 70s at best for the
valleys.

&&

.AVIATION...08/1743Z.

At 1649Z at KLAX, the marine layer was about 300 feet deep. The
top of the inversion was at 2400 ft with a temperature of 17
degrees Celsius.

Overall, moderate to high confidence in 18Z TAF Package. High
chance Central Coast TAF sites remain VFR thru fcst pd (there is a
10% chc of IFR/LIFR cigs at KSMX from 08Z to 15Z Wed). There is a
30-40% chc cigs do not arrive at KOXR and a 30% of cig arrival
(IFR conds) at KCMA from 12Z to 16Z Wed.

KLAX...Good confidence in the 18Z TAF. Likely chance for IFR cigs
007-008 with MVFR vsbys (3-6SM) from 10Z to 16Z Wed (+/- 1 hour).
There is no significant east wind component expected.

KBUR...High confidence in the 18Z TAF with VFR conds thru the pd.

&&

.MARINE...08/137 PM.

A shallow marine layer will bring a risk of dense fog to anywhere
in the coastal waters thru the week. The highest chances are off
the Central Coast, and off the coast of L.A./Orange Counties.

High confidence in Small Craft Advisory (SCA) winds (21+ kt) and/or
seas (10+ ft) in the outer waters thru late tonight. After a lull
Wed morning, SCA level winds are likely (80-90% chance) most of
the time Wed afternoon thru Sat night. There is a 30% chance of
GALE force winds at times Fri thru Sat eve. Seas are expected to
increase to SCA levels overnight Friday into Saturday possibly
lasting thru the weekend.

In the nearshore waters north of Pt Conception, SCA winds are
likely (70-80% chance) each afternoon/eve thru Sat, except for a
lower chance (60% chance) Thu afternoon/eve. Followed by lower
chances for SCA winds at 30% on Sunday. There is a moderate chance
of SCA level seas sometime during the weekend (likely on Sat).

In the Santa Barbara Channel, SCA level winds are likely across
western portions this afternoon/eve, and again during the
afternoon/eve hours Fri thru Sat.

In the southern inner waters, SCA conds are not expected thru Sat
afternoon.

All areas will have short period choppy seas on top of the long
period swell (largest in the late afternoon/eve hours).

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...Wind Advisory in effect until 3 AM PDT Wednesday for zones
      349-351. (See LAXNPWLOX).
PZ...Small Craft Advisory in effect until 9 PM PDT this evening
      for zones 645-650. (See LAXMWWLOX).
     Small Craft Advisory in effect until 3 AM PDT Wednesday for
      zones 670-673-676. (See LAXMWWLOX).

&&

$$

PUBLIC...MW
AVIATION...Black
MARINE...Black/DB
SYNOPSIS...MW/Hall

weather.gov/losangeles

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