The National Weather Service has issued a flood advisory for the San Gabriel Valley Tuesday afternoon.
The urban and small stream advisory affects mostly the adjacent foothills in eastern Los Angeles County until 6:15 p.m. today.
At 3:20 p.m., the NWS detected a cluster of heavy showers and thunderstorms over the eastern San Gabriel Valley capable of generating flooding conditions. The heaviest rains this afternoon swept from Monrovia to Azusa along the Interstate 210 freeway corridor with rain estimates of 1 inch per hour.
The Colby Fire Impact Area could see brief, heavy downpours capable of producing minor debris and mudflows, the NWS reported.
Cities most affected by the approaching rains include Monrovia, Azusa, Glendora, San Dimas, La Verne, Pomona and Claremont.
