Central and western Wyoming is under a is under a flash flood watch until 3 a.m. Saturday, according to the Riverton office of the National Weather Service.

The area covers western Natrona, Johnson, Big Horn, Washakie, Hot Springs, Fremont, Sweetwater and Lincoln counties. Portions of northern Natrona, southern Washakie, and northeastern and southwestern Fremont counties are also under flood advisories.

Affected cities could include Casper, Riverton, Lander, Shoshoni, Buffalo, Kaycee, Dubois, Pinedale, Farson, Kemmerer, Cokeville, Rock Springs, Green River and Wamsutter.

"Slow moving thunderstorms will have plenty of moisture to work with today... nearly twice the normal amount," according to the National Weather Service.

"Heavier thunderstorms could drop one to two inches of rain in a very short period of time."

Those who live near burn scars or downstream of creeks and dry washes are urged to be on the lookout for warnings, according to the NWS.

Some of these storms could deliver heavy rainfall through midnight, and rainfall in higher elevations may take several hours to travel into inhabited areas.

A flash flood watch means that conditions may develop that lead to flash flooding, which is a very dangerous situation. Please monitor later forecasts and be prepared to take action should flash flood warnings are issued. according to the NWS

Do not drive into flood waters. Report any flooding to the National Weather Service at (307) 857-3898, or to local law enforcement.