Torrential rain and strong thunderstorms pushed across the southern Plains on Saturday, spawning tornadoes and dangerous flash flooding from Kansas to Texas.
"An intense squall line that formed in the Sierra Madre Mountains of Mexico late in the day on Saturday marched across central and eastern Texas Saturday night," AccuWeather Meteorologist Ben Noll said.
"Rainfall rates were record smashing in some cases, particularly near Blanco, Texas, north of San Antonio and west of Austin," he said.
Totals averaged between 3-6 inches, but localized amounts up to 10 inches were observed, leading to the worst river flooding in recorded history of the Blanco River in San Marcos, Texas.
Numerous water rescues were occurring overnight despite pleas from police and emergency crews to avoid areas that are flooded and have barricades in place.
Around 11:00 p.m. CDT, the Wimberley, Texas, Fire Department reported that numerous rescues were underway.
In Tulsa, Oklahoma, the fire department reported that they responded to 20 incidents between 9:00 and 10:00 p.m. CDT, half of which were to vehicles stalled in flood waters.
Additionally, more than 3 inches of rain fell on Oklahoma City, Oklahoma, making the month of May the wettest on record with over 17 inches. The previous record was 14.52 inches set in May of 2013.
A state of emergency was put into effect for more than 40 Oklahoma counties on Saturday night as a result of the dangerous flooding.
As os Saturday night, the National Weather Service in Norman, Oklahoma, had issued 70 flash flood warnings so far this year, a total higher than the last four years combined.
"Embedded within the line of torrential downpours were storms capable of producing damaging wind gusts and a few tornadoes," Noll said.
Tornadoes were preliminarily reported in five states across the Plains, with a total of eight unconfirmed tornadoes between Texas and Oklahoma alone.
Roughly 10 homes were damaged by a possible tornado in Blanchard, Oklahoma. Another reportedly crossed through Dripping Springs, Texas, in Hays County, damaging several mobile homes.
The threat for severe weather, including dangerous flooding, will continue through Memorial Day.
"Soon after one round of heavy rain moves to the east, additional rounds will fire up over flooded areas or areas teetering on the brink of flooding," AccuWeather Meteorologist Alex Sosnowski said.