J.R. Smith sounded the alarm yesterday in Los Angeles after the Knicks fell to 0-4 on their nightmarish West Coast trip, after Lob City was too much for Limp City.

The high-flying Clippers of Blake Griffin, Chris Paul and DeAndre Jordan dismissed the ancient and depleted Knicks, 93-80, at Staples Center in yesterday’s matinee. The Knicks are in complete disarray as they limp off to finish their five-game journey to hell tonight in Utah.

With the Nets’ 105-93 loss to the Hawks last night, the Knicks avoided falling into a first-place tie in the Atlantic Division.

The Knicks were undermanned again without their “Trio Grande’’ frontcourt and could be without them again tonight in the trip’s finale. Carmelo Anthony sat in the locker room during the game getting treatment, and said as he walked to the bus: “Not going to talk today.’’

It is highly unlikely Anthony plays tonight, though Tyson Chandler’s chances are better.

It doesn’t matter to Smith, now the voice of the locker room with Anthony rehabbing from his knee drainage, Chandler battling a strained muscle in his neck and bruised left knee and Amar’e Stoudemire home rehabbing his surgically repaired left knee.

Smith, who has been playing through a sore left knee, questioned the team’s “heart’’ earlier in the trip and warned the club may be facing an early playoff exit if it doesn’t get with it.