As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, WEATHER RADAR IMAGES CELLS THAT MOVE 20 TO 30 MILES AFTER EACH SWEEP DUE TO EN ROUTE WEATHER. FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. TESTED THE RADAR TRANSCEIVER PER 34-41-4. ADJUSTED ANTENNA/TRANSCEIVER SYNCHRONIZATION, OPERATIONAL CHECK GOOD.