A near-stationary Hurricane Bertha weakened to tropical storm status Sunday, 220 miles southeast of Bermuda, U.S. forecasters in Miami reported.The storm had sustained winds of 70 mph with gusts up to 90 mph, the U.S. National Hurricane Center said.The system stalled its forward movement Saturday, leading Miami forecaster Lixion Avilla to say in his advisory: After a week or so ... I am running out of things to say about Bertha.Tropical storm force winds extend outward up to 140 miles, but some weakening was forecast through Monday, the report said.The Bermuda weather office posted a tropical storm warning Saturday saying as much as 4 inches of rain could fall in the next couple of days. ...