National Weather Service United States Department of Commerce

Heavy rain possible for parts of the northern Rockies & Plains; Severe storms for the Upper Midwest

An unseasonably strong storm system in the northwest U.S. will bring showers and thunderstorms, some heavy, to parts of the northern Rockies and northern Plains through Saturday. Isolated flash floods will be possible in these areas. Some of the storms could be severe in parts of the Dakotas into Minnesota, with large hail and damaging winds.
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Hazardous Weather Conditions

Current Conditions

Sullivan County

Zone Forecast

  • Rest Of Tonight Mostly cloudy. A chance of showers and thunderstorms after midnight...then a slight chance of showers and thunderstorms early in the morning. Lows in the upper 60s. Light winds. Chance of rain 50 percent.
  • Saturday Partly sunny with a 50 percent chance of showers and thunderstorms. Highs in the mid to upper 80s. West winds 10 mph or less.
  • Saturday Night Mostly cloudy. A chance of showers and thunderstorms until early morning...then a slight chance of showers and thunderstorms early in the morning. Lows in the mid to upper 60s. Light winds. Chance of rain 40 percent.
  • Sunday Partly sunny with a 40 percent chance of showers and thunderstorms. Highs in the mid to upper 80s. East winds 10 mph or less.
  • Sunday Night Mostly cloudy. A chance of showers and thunderstorms in the evening...then a slight chance of showers and thunderstorms after midnight. Lows in the mid to upper 60s. East winds 10 mph or less. Chance of rain 30 percent.
  • Monday Partly sunny with a 20 percent chance of showers and thunderstorms. Highs in the mid to upper 80s.
  • Monday Night Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the lower to mid 60s.
  • Tuesday Mostly sunny. Highs in the mid to upper 80s.
  • Tuesday Night Mostly clear. Lows in the lower 60s.
  • Wednesday Mostly sunny. Highs in the mid 80s.
  • Wednesday Night Partly cloudy. Lows in the lower to mid 60s.
  • Thursday Partly sunny with a 30 percent chance of showers and thunderstorms. Highs in the mid to upper 80s.
  • Thursday Night Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the mid 60s.
  • Friday Mostly sunny with a 20 percent chance of showers and thunderstorms. Highs in the lower to mid 80s.