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Flintridge, California 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for 3 Miles W Altadena CA
National Weather Service Forecast for: 3 Miles W Altadena CA
Issued by: National Weather Service Los Angeles/Oxnard, CA
Updated: 5:50 am PDT Jul 3, 2025
 
Today

Today: Mostly cloudy through mid morning, then gradual clearing, with a high near 81. Calm wind becoming south around 5 mph in the afternoon.
Becoming
Sunny
Tonight

Tonight: Patchy dense fog after 11pm.  Otherwise, increasing clouds, with a low around 58. South southwest wind 5 to 10 mph becoming light south southeast  after midnight.
Patchy Dense
Fog
Independence
Day
Independence Day: Patchy dense fog before 11am.  Otherwise, cloudy through mid morning, then gradual clearing, with a high near 84. Calm wind becoming south southwest around 5 mph in the afternoon.
Patchy Dense
Fog then
Sunny
Friday
Night
Friday Night: Mostly clear, with a low around 60. South southwest wind around 5 mph becoming calm  in the evening.
Mostly Clear

Saturday

Saturday: Sunny, with a high near 86. Calm wind becoming south southwest around 5 mph in the afternoon.
Sunny

Saturday
Night
Saturday Night: Partly cloudy, with a low around 61.
Partly Cloudy

Sunday

Sunday: Mostly sunny, with a high near 87.
Mostly Sunny

Sunday
Night
Sunday Night: Partly cloudy, with a low around 61.
Partly Cloudy

Monday

Monday: Mostly sunny, with a high near 89.
Mostly Sunny

Hi 81 °F Lo 58 °F Hi 84 °F Lo 60 °F Hi 86 °F Lo 61 °F Hi 87 °F Lo 61 °F Hi 89 °F

Air Quality Alert
 

Today
 
Mostly cloudy through mid morning, then gradual clearing, with a high near 81. Calm wind becoming south around 5 mph in the afternoon.
Tonight
 
Patchy dense fog after 11pm. Otherwise, increasing clouds, with a low around 58. South southwest wind 5 to 10 mph becoming light south southeast after midnight.
Independence Day
 
Patchy dense fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 84. Calm wind becoming south southwest around 5 mph in the afternoon.
Friday Night
 
Mostly clear, with a low around 60. South southwest wind around 5 mph becoming calm in the evening.
Saturday
 
Sunny, with a high near 86. Calm wind becoming south southwest around 5 mph in the afternoon.
Saturday Night
 
Partly cloudy, with a low around 61.
Sunday
 
Mostly sunny, with a high near 87.
Sunday Night
 
Partly cloudy, with a low around 61.
Monday
 
Mostly sunny, with a high near 89.
Monday Night
 
Partly cloudy, with a low around 64.
Tuesday
 
Mostly sunny, with a high near 91.
Tuesday Night
 
Mostly clear, with a low around 68.
Wednesday
 
Mostly sunny and hot, with a high near 96.

 

Forecast from NOAA-NWS for 3 Miles W Altadena CA.

Weather Forecast Discussion
953
FXUS66 KLOX 031138
AFDLOX

Area Forecast Discussion...UPDATED
National Weather Service Los Angeles/Oxnard CA
438 AM PDT Thu Jul 3 2025

UPDATED AVIATION SECTION

.SYNOPSIS...03/356 AM.

Near normal weather conditions are anticipated through this
weekend with continued night to morning low clouds and fog near
the coast. The first significant widespread heatwave of the
summer is favored for mid to late next week.

&&

.SHORT TERM (TDY-SAT)...03/325 AM.

Mild weather with a very slight warming trend each day is
expected through the weekend. Continued warm temperatures are
forecast for inland areas, with cooler conditions near the
coasts. Daytime highs will generally be in the 70s near the coast,
80s coastal valleys and 90s lower mountains to the interior.
Temperatures will generally be just below normal for much of the
region, and within a couple degrees of normal across the LA Basin.
Overnight to morning marine layer clouds and fog will continue
each day extending from the beaches into the coastal valleys.
Areas of dense fog will be possible by the weekend

Far interior areas will continue to be dry during the day with
breezy onshore winds during the afternoons and evenings, as is
typical for this time of year. Additionally northerly Sundowner
winds are likely to return to southwest Santa Barbara County this
Friday night and persist through at least the weekend. Gusts of 25
to 45 mph will be common across the typically windy areas, with
chances for local gusts of 50 mph. These downsloping winds may
result in areas of fire weather concerns for the Santa Ynez Range
and portion of the adjacent coast.

The Madre Fire is currently burning in southeast San Luis Obispo
County and creating a significant amount of smoke for the Cuyama
Valley. Upper level smoke is currently drifting far south from its
origin over Santa Barbara County and western portions of Ventura
County. Smokey skies may be visible from portions of LA County
today, though it is likely to stay elevated well above the
surface.

.LONG TERM (SUN-WED)...03/356 AM.

For mid-to-late next week confidence in above normal temperatures
is quite high, as mostly all models favor a strong ridge of high
pressure building for the region. There remains some uncertainty
in the severity of this upcoming heat event however. Tuesday
temperatures are likely to bump upwards, with much of LA County
reaching several degrees above normal. Heat is then likely to
build over the region, peaking Wednesday or Thursday, with the
potential to last into next weekend. Triple digit heat (100
degrees or greater) is favored for interior valleys and deserts,
with a small chance for the warmest areas to reach or exceed 110
degrees. Heat Advisories are likely to be issued for warmest
valleys, with around a 20 percent chance of Extreme Heat
Watch/Warnings becoming necessary for some valleys, mountains,
and/or deserts. Hazardous heat impacts are possible for all areas,
except perhaps the immediate coasts, where marine layer clouds
will play a great role in the temperature. Anyone working
outdoors, living without air conditioning, or belonging to groups
sensitive to heat, are advised to stay up to date with the
forecast and prepare for an extended period of above normal
temperatures.

There is a chance for monsoonal mositure to reach the region next
week, with around a 10 percent chance of thunderstorms focused
across the mountains and deserts as early as Tuesday for Los
Angeles/Ventura Counties, extending across the remaining interior
areas Wednesday into late next week. Dry lightning fire starts,
gusty winds, and locally heavy rain are potential monsoon
thunderstorm hazards.

&&

.AVIATION...03/1135Z.

At 1122Z at KLAX, the marine layer was 2200 ft deep. The top of
the inversion was around 5200 feet with a temperature of 23 C.

High confidence in VFR TAFs for KWJF and KPMD.

Low confidence in TAF for KPRB through 17Z. There is a 40% chance
VFR conds prevail. High confidence thereafter.

Moderate to high confidence in remaining TAFs. Dissipation of cigs
may be off by 2 hours, and coastal sites south of Point Conception
may not clear today. There is a 40% chance KOXR clears after 20Z,
but cigs may vary from SCT to BKN through the afternoon. Lower
confidence in minimum flight cat tonight, thus flight cats may be
off by one cat. Arrival of cigs may be off by 3 hours. There is a
30% chance of no low clouds tonight at KBUR and KVNY.

KLAX...Moderate confidence in TAF. Timing of dissipation of cigs
may be off by 2 hours, and there is a 20% chance for BKN015-025
cigs to continue through the afternoon and don`t clear. Arrival
of cigs may be off by 3 hours and lower confidence on minimum
cig height (+/- 300 ft). Moderate confidence in any east wind
component remaining below 8 kts through 18Z. Higher confidence in
east wind component below 6 kts tonight.

KBUR...Moderate confidence in TAF. There is a 20% chance of no
low clouds forming tonight.

&&

.MARINE...03/236 AM.

Small Craft Advisory (SCA) winds are likely across the Outer
Waters much of the time through the 4th of July Weekend. SCA
winds are also likely each afternoon and evening for the nearshore
waters along the Central Coast Friday through the weekend, with a
30% chance this afternoon through evening. Local Gale Force wind
gusts are possible through Sunday, with best chances around the
western Channel Islands and in the northern Outer Waters Friday
afternoon and evening (30% chance). Seas will build to 8 to 10
feet at times through the weekend.

Inside the southern California bight, there is a moderate
(30-40%) chance of SCA level winds each afternoon and evening
Friday through the weekend across the Santa Barbara Channel
(strongest winds focused in the western portions). Local gusts to
20 kts may occur near Point Dume, and into the San Pedro Channel
during the aforementioned time.

Patchy dense fog may affect the coastal waters, especially north
of Point Conception overnight and in the morning hours through
this weekend.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement in effect from 11 AM PDT this morning
      through Saturday evening for zones 87-354-362-366. (See LAXCFWLOX).
PZ...Small Craft Advisory in effect until 3 AM PDT Sunday for zone
      670. (See LAXMWWLOX).
     Small Craft Advisory in effect from 3 PM this afternoon to 3
      AM PDT Saturday for zones 673-676. (See LAXMWWLOX).

&&

$$

PUBLIC...Schoenfeld
AVIATION...Lewis
MARINE...Lewis
SYNOPSIS...Ciliberti/RS

weather.gov/losangeles

Experimental Graphical Hazardous Weather Outlook at:
https://www.weather.gov/erh/ghwo?wfo=lox
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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