B757-200
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport; General Maintenance Action
Aircraft
Weather radar failed after takeoff.  Conferred with dispatch; thunderstorms at destination and alternate; returned to MIA for maintenance.  Coordinated with operations for gate; maintenance.  Overweight landing accomplished. Weather radar was written up previous day as intermittent.
B757-200 Captain experiences a radar failure after takeoff and returns for maintenance due to thunderstorms forecast at the destination and alternate. The radar had been written up the day prior.