Formal:
* Apparent
* Clear
* Obvious
* Manifest
* Palpable
* Conspicuous
* Noticeable
* Plain
* Visible
* Indisputable
* Unmistakable
* Demonstrable
Informal:
* Clear as day
* Right there in your face
* Easy to see
* Jumping out at you
* No mistaking it
The best synonym for "evident" will depend on the specific context and the tone you want to convey.