SACRAMENTO, Calif. (AP) _ Damage from storms that raked Southern California this month has reached nearly $50 million, state officials say.

That figure was cited Tuesday in Gov. George Deukmejian's request to President Reagan for a federal declaration of emergency for the counties of Los Angeles, Orange, San Diego and Santa Barbara, and the City of Ventura.

Deukmejian said the severe winds, rainstorms and high tides beginning Jan. 17 caused $19,722,000 worth of damage to private businesses, $3,542,300 to private residences and $10,596,900 to public property.

He said flower growers along the coast suffered losses of about $12.5 million, and avocado growers lost about $3 million.