[firehunter]

During the day, the fire gets a lot of it's momentum from
local weather conditions, which are usually uphill, up canyon winds. At night, the air becomes cool, and usually blows downhill, or down canyon. ( usually..obviously this does not apply with Santa Ana conditions.)
That is why the fire USUALLY "lays down" at night.

[amom]

During the day, the fire gets a lot of it's momentum from local weather conditions, which are usually uphill, up canyon winds. At night, the air becomes cool, and usually blows downhill, or down canyon. ( usually..obviously this does not apply with Santa Ana conditions.) That is why the fire USUALLY "lays down" at night.

Ahhhhhh...thanks for explaining that.