Weather permitting, there will be a fantastic light show in the skies over Eastern Washington Wednesday night through early Thursday morning. It's called the Perseid Meteor shower and it's an annual event occurring all week. But with the peak time in Eastern Washington on Wednesday night till dawn. But the Perseid Meteor shower on a clear night can be stunning. The Perseid Meteor Shower is debris from a comet, (109P/Swift-Tuttle).