The top image is the MRMS estimate of the 60dbz echo top of a storm over Wilmington NC CWA, estimating the 60dbz echo top around 6500 ft at 2022 UTC on 5/23.  However, the bottom image is the corresponding KLTX 8.0 degree slice, indicating 60-62dbz to at least 29,000 ft.  At least in this instance, the MRMS 60dbz echo top algorithm did not perform well.