History has repeated itself…we just broke the all-time May rainfall record again on the Saturday night of Memorial Day Weekend. Remember 2008? A big thunderstorm on Saturday evening.
Portland Airport reported 1.02″ rainfall from 6:53-7:53pm. And most of that appears to have fallen in the final 45 minutes of the hour. Check out the observations here.
The rainfall is in green on the right side.
.97″ of this fell in 36 minutes from 7:17 to 7:53pm!
Compare that to the record sheet here:
We have broken the all-time one, two, and three hour rainfall record for May this evening (.93-.95″ on May 24, 2008)
We MAY have broken the all-time one hour rainfall record (1.03″ on September 7, 2010)
The National Weather Service will probably put out a statement after a bit more rain collects in the next hour. For example, 7:10-8:10pm rainfall could easily be higher than that 1.03″ all time record.
Chief Meteorologist Mark Nelsen