Miami - Hurricane Harvey has set what forecasters believe is a new rainfall record for the continental United States, officials said on Tuesday.Harvey, swirling for the past few days off Texas and Louisiana - at times as a hurricane and at times a tropical storm - has dumped more than 1 245 mm of rain on the region."The record for total rainfall from tropical system has been BROKEN!" the National Weather Service Houston announced on Twitter.According to the latest report from the National Hurricane Center, the data comes from a rain gauge southeast of Houston."Mary's Creek at Winding Road recorded 1 252.7 mm as of 09:00 CDT," (14:00 GMT), the NHC said."This total is higher than the previous record of 1 219 mm set during tropical cyclone Amelia of 1978 at Medina, Texas," the NWS added.NHC spokesperson Dennis Feltgen said the record is being treated preliminarily as one for the entire continental United States.He added that confirming it "will take a lot of research," as experts review water gauges and past historical records - a process likely to take several weeks.Harvey made landfall in Texas Friday as a Category Four hurricane. It has since weakened to a tropical storm but continues to unleash massive amounts of rain over Texas and Louisiana.