It sounds as if the starter solenoid is getting 'stuck' due to low voltage. That is the second buzzing noise. The high pitched sound is your fuel pump priming your system and is normal.
Perhaps the rain created a grounding situation that drained your battery a bit. Regardless of that speculation, here is the fix.
Charge the battery. I believe that is all you will have to do.
If you choose to jump start your bike off a car w/ jumper cables
DO NOT START THE CAR
The additional amperage from the alternator can potential cook your battery by charging it too fast, hence the recommendation to simply use the car batter alone.
Leave the car off and just jump start your bike. Ride the bike for 10 or 15 minutes and when you get home turn it off and try and start it on it's own.
My prediction is that it will be fine and the battery will be charged from your ride.