Later that day , it was upgraded to Tropical Storm Darby , and only four hours later , at NUMBER@1 a.m. -LRB- NUMBER@2 UTC -RRB- on July NUMBER@3 , was upgraded to Hurricane Darby .

Later that day , it was upgraded to Tropical Storm Darby , and only four hours later , at NUMBER@1 am -LRB- NUMBER@2 UTC -RRB- on July NUMBER@3 , is upgraded to Hurricane Darby .
