664
FNUS86 KLOX 032155
FWLLOX

ECCDA Discussions
National Weather Service Los Angeles/Oxnard CA
255 PM PDT Wed Sep 3 2025

ECC029-041600-
Los Padres National Forest-
Discussion for Vandenberg ECC Dispatch
255 PM PDT Wed Sep 3 2025

...Discussion from Monterey...

A generally benign weather pattern continues through the next week
with a gradual cooling trend in the forecast. The marine layer will
deepen through the next few days, resulting in more inland stratus,
possible coastal drizzle, and improving overnight humidity
recoveries in the hills outside of the highest peaks. Clouds will
retreat to the coast each morning and breezy onshore winds develop
each afternoon, with gusty conditions through favored valleys, gaps,
and exposed ridges.

Note : All winds are 20-foot Winds Unless otherwise specified.
Thunderstorms imply strong, gusty and erratic winds.



...Discussion from Los Angeles/Oxnard...

This afternoon and again Thursday, there is a slight chance of
monsoonal shower and thunderstorm activity across the mountains and
deserts of LA and Ventura Counties. If a storm were to develop,
hazards  may include gusty downburst/outflow winds, lightning, and
brief heavy  rainfall. Chances for storms has shifted enough to the
east that the  previous Flood Watch has been canceled early.

Warm to hot temperatures will persist today, and the Heat Advisory
will expire this evening for the coasts and valleys of LA and
Ventura  Counties. Hot temperatures combined with instability will
result in  moderately deep mixing heights between 10,000 and
14,000 feet this  afternoon. As a result, there is still an elevated
risk for large plume  dominated fires across the interior. Thursday
through Saturday,  temperatures will gradually trend downward,
becoming below normal on  Friday.

Humidities will be between 18 and 30 percent for the lower
mountains,  and deserts today and tomorrow. Then falling to 12 to
20 percent for the driest mountains and desert areas Friday through
the weekend. Typical  diurnal winds are anticipated for the next
several days, except for  Sundowner winds for southwestern Santa
Barbara County during the  evenings (northwest 15 to 25 mph with
gust to 35 mph).


$$

ECC028-041600-
Santa Barbara County excluding Los Padres National Forest-
Discussion for Santa Barbara ECC Dispatch
255 PM PDT Wed Sep 3 2025



This afternoon and again Thursday, there is a slight chance of
monsoonal shower and thunderstorm activity across the mountains and
deserts of LA and Ventura Counties. If a storm were to develop,
hazards  may include gusty downburst/outflow winds, lightning, and
brief heavy  rainfall. Chances for storms has shifted enough to the
east that the  previous Flood Watch has been canceled early.

Warm to hot temperatures will persist today, and the Heat Advisory
will expire this evening for the coasts and valleys of LA and
Ventura  Counties. Hot temperatures combined with instability will
result in  moderately deep mixing heights between 10,000 and
14,000 feet this  afternoon. As a result, there is still an elevated
risk for large plume  dominated fires across the interior. Thursday
through Saturday,  temperatures will gradually trend downward,
becoming below normal on  Friday.

Humidities will be between 18 and 30 percent for the lower
mountains,  and deserts today and tomorrow. Then falling to 12 to
20 percent for the driest mountains and desert areas Friday through
the weekend. Typical  diurnal winds are anticipated for the next
several days, except for  Sundowner winds for southwestern Santa
Barbara County during the  evenings (northwest 15 to 25 mph with
gust to 35 mph).


$$

ECC031-041600-
Angeles National Forest-
Discussion for Lancaster ECC Dispatch
255 PM PDT Wed Sep 3 2025



This afternoon and again Thursday, there is a slight chance of
monsoonal shower and thunderstorm activity across the mountains and
deserts of LA and Ventura Counties. If a storm were to develop,
hazards  may include gusty downburst/outflow winds, lightning, and
brief heavy  rainfall. Chances for storms has shifted enough to the
east that the  previous Flood Watch has been canceled early.

Warm to hot temperatures will persist today, and the Heat Advisory
will expire this evening for the coasts and valleys of LA and
Ventura  Counties. Hot temperatures combined with instability will
result in  moderately deep mixing heights between 10,000 and
14,000 feet this  afternoon. As a result, there is still an elevated
risk for large plume  dominated fires across the interior. Thursday
through Saturday,  temperatures will gradually trend downward,
becoming below normal on  Friday.

Humidities will be between 18 and 30 percent for the lower
mountains,  and deserts today and tomorrow. Then falling to 12 to
20 percent for the driest mountains and desert areas Friday through
the weekend. Typical  diurnal winds are anticipated for the next
several days, except for  Sundowner winds for southwestern Santa
Barbara County during the  evenings (northwest 15 to 25 mph with
gust to 35 mph).


$$

ECC024-041600-
San Luis Obispo County-
Discussion for San Luis Obispo ECC Dispatch
255 PM PDT Wed Sep 3 2025



This afternoon and again Thursday, there is a slight chance of
monsoonal shower and thunderstorm activity across the mountains and
deserts of LA and Ventura Counties. If a storm were to develop,
hazards  may include gusty downburst/outflow winds, lightning, and
brief heavy  rainfall. Chances for storms has shifted enough to the
east that the  previous Flood Watch has been canceled early.

Warm to hot temperatures will persist today, and the Heat Advisory
will expire this evening for the coasts and valleys of LA and
Ventura  Counties. Hot temperatures combined with instability will
result in  moderately deep mixing heights between 10,000 and
14,000 feet this  afternoon. As a result, there is still an elevated
risk for large plume  dominated fires across the interior. Thursday
through Saturday,  temperatures will gradually trend downward,
becoming below normal on  Friday.

Humidities will be between 18 and 30 percent for the lower
mountains,  and deserts today and tomorrow. Then falling to 12 to
20 percent for the driest mountains and desert areas Friday through
the weekend. Typical  diurnal winds are anticipated for the next
several days, except for  Sundowner winds for southwestern Santa
Barbara County during the  evenings (northwest 15 to 25 mph with
gust to 35 mph).


$$

ECC032-041600-
Ventura County excluding Los Padres National Forest-
Discussion for Ventura ECC Dispatch
255 PM PDT Wed Sep 3 2025



This afternoon and again Thursday, there is a slight chance of
monsoonal shower and thunderstorm activity across the mountains and
deserts of LA and Ventura Counties. If a storm were to develop,
hazards  may include gusty downburst/outflow winds, lightning, and
brief heavy  rainfall. Chances for storms has shifted enough to the
east that the  previous Flood Watch has been canceled early.

Warm to hot temperatures will persist today, and the Heat Advisory
will expire this evening for the coasts and valleys of LA and
Ventura  Counties. Hot temperatures combined with instability will
result in  moderately deep mixing heights between 10,000 and
14,000 feet this  afternoon. As a result, there is still an elevated
risk for large plume  dominated fires across the interior. Thursday
through Saturday,  temperatures will gradually trend downward,
becoming below normal on  Friday.

Humidities will be between 18 and 30 percent for the lower
mountains,  and deserts today and tomorrow. Then falling to 12 to
20 percent for the driest mountains and desert areas Friday through
the weekend. Typical  diurnal winds are anticipated for the next
several days, except for  Sundowner winds for southwestern Santa
Barbara County during the  evenings (northwest 15 to 25 mph with
gust to 35 mph).


$$

ECC030-041600-
Los Angeles County excluding Angeles National Forest-
Discussion for Los Angeles ECC Dispatch
255 PM PDT Wed Sep 3 2025



This afternoon and again Thursday, there is a slight chance of
monsoonal shower and thunderstorm activity across the mountains and
deserts of LA and Ventura Counties. If a storm were to develop,
hazards  may include gusty downburst/outflow winds, lightning, and
brief heavy  rainfall. Chances for storms has shifted enough to the
east that the  previous Flood Watch has been canceled early.

Warm to hot temperatures will persist today, and the Heat Advisory
will expire this evening for the coasts and valleys of LA and
Ventura  Counties. Hot temperatures combined with instability will
result in  moderately deep mixing heights between 10,000 and
14,000 feet this  afternoon. As a result, there is still an elevated
risk for large plume  dominated fires across the interior. Thursday
through Saturday,  temperatures will gradually trend downward,
becoming below normal on  Friday.

Humidities will be between 18 and 30 percent for the lower
mountains,  and deserts today and tomorrow. Then falling to 12 to
20 percent for the driest mountains and desert areas Friday through
the weekend. Typical  diurnal winds are anticipated for the next
several days, except for  Sundowner winds for southwestern Santa
Barbara County during the  evenings (northwest 15 to 25 mph with
gust to 35 mph).


$$