Large flashes of light in N.E, Portland.

I was driving from Clackamas to Portland.  I decided to drive over the hill through Happy Valley.  As I was driving up the hill, I saw a huge flash of light that lit up the whole sky around the hill.  As I'm driving down the hill by Willamette National Cemetery, I saw another flash of light.  Then again, as I'm headed west on Foster towards 205.  Driving North on 205 I saw another flash.  I get off the freeway headed towards Columbia BLVD and as Im turning to go west on Columbia I saw like a lightning bolt.  As I'm driving west on columbia BLVD I get out my phone and start recording.  I saw one more flash the weird thing is we've had no thunder and lightening today.  This was very strange to me.
I was in McMinnville, OR, on the date indicated, and there was a very active lightning storm in progress, at the time indicated by the witness.  The flashes the witness alludes to may very well have been lightning, we believe.  PD