It could take weeks or months for the public to know what caused the fire that last month charred 6,600 acres in the Otay Mountain Wilderness as local Cal Fire officials continue their investigation.

According to the National Weather Service, a flood watch is in effect for San Diego County from Thursday afternoon through late Thursday night.

There is up to a 15% chance of light precipitation on Tuesday as the marine layer deepens from coastal to foothill areas throughout the county, with the heavier rain arriving later in the week, forecasters said.

The storm is expected to bring about 2 inches of rain to northern and southern parts of the county between Wednesday and Friday

Wet weather is on its way to San Diego County Monday, with rain arriving as early as Tuesday, forecasters said