Participant Photo: Have you ever heard THUNDER before a snow fall?

Actually, it was a great bird Morning,, and all of a sudden,, panic,, all the birds flew away..
At first I thought it was a snow plow.. and a minutes later,, I heard Thunder..
The birds had somewhat heard or sensed it before it reached us..
Tonight the weather will be in the low 17Celsius and dropping -24Celsius during the night..