Fast moving thunderstorms that moved through Boulder County on Sunday night dumped enough rain to temporarily flood some Longmont streets.
Kyle Fredin, meteorologist with the National Weather Service, said the storm was moving fairly quickly on Sunday night in a line from Gilpin County to Boulder County to northern Jefferson County.
While there were reports of the street flooding in Longmont and northern Colorado, he said, there weren't reports of flooding causing damage.
Based on radar, he estimated that thunderstorms had produced half an inch to 1.3 inches of rain. The storm also produced hail from pea size up to a half an inch, he said.
More storms are possible Monday, with the forecast calling for a little warmer and a little more unstable weather, Fredin said.
"It looks like another round of storms, another unsettled day," he said, noting the first couple of weeks May is typically prime time for rain and storms.
Monday's high is expected to be in the mid-60s, with temperatures expected to get warmer through the week and a high of 77 by Thursday.