* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...Northwestern Billings County in southwestern North Dakota...
* WHEN...Until 515 AM MDT.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
* ADDITIONAL DETAILS... - At 152 AM MDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 2 and 4 inches of rain have fallen. - Some locations that will experience flooding include... Elkhorn State Natural Area. - http://www.weather.gov/safety/flood