Lohans-Mugshot230new.jpgMichael Lohan is back in trouble with the law after violating a condition of his pretrial release, according to TMZ.

The site claims the violation involved Lohan, 51, contacting his ex-girlfriend Kate Major, 25 ... just one day after being arrested on domestic violence charge and ordered to stay away from her.

Police say once they arrived at Lohan's residence in Tampa, he attempted to avoid arrest by jumping from a third story balcony ... 34 feet down.

After finding him in some trees, Lindsay's dad was arrested, and instead of being taken to jail, a Tampa PD PIO tells us Lohan was transported to a hospital for "overnight observation."

Kate Major tells TMZ that Lohan "has no regard for the justice system" and she's tired of his "false allegations about his continual physical and mental abuse toward me."