Will an iphone show notifications when it's in lost mode?

I lost my phone, and I'm wondering if someone who found my phone would be able to see the facebook messages/text messages people send me while I don't have it. What does an iphone in lost mode look like? Thanks!

Added (1). I have it set on my phone to display the text/facebook message on the screen without being unlocked.

Ok so usually when you put it in lost mode from icloud.com it will prompt you to make a pin to unlock your phone. I don't believe a person who found the phone can see the notifications. BTW i suggest you go to were you lost it and have it play a sound and make it prompt your info (via the website) so someone knows were to contact you when they find it.

See around 4:00 to check what Lost Mode looks like. Sadly, your notifications will most likely still show up on on the lock screen. Of course if you have a passcode on it, all they will get is the previews and not be able to open/enter/reply to them. Hopy you get it back. Best luck.