National Weather Service United States Department of Commerce

A stalled frontal boundary and ample monsoonal moisture will lead to flash flood potential from the Great Basin to the Great Plains tonight and Tuesday

A stalled frontal boundary will set up along the southern and central Rockies for the next couple of days providing focus for showers and thunderstorms. In addition, ample monsoonal moisture will stream in across the southwest bringing enough moisture to introduce a flash flood threat from the Great Basin and Southwest eastward across the central and southern Rockies into the adjacent Plains.
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Current Conditions

Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Zone Forecast

  • Tonight Mostly cloudy. Chance of thunderstorms early in the evening...then a slight chance of thunderstorms overnight. Lows near 60. Chance of thunderstorms 30 percent.
  • Tuesday Slight chance of thunderstorms in the morning...then thunderstorms likely in the afternoon. Some thunderstorms may produce heavy rainfall in the afternoon. Highs in the mid 70s to lower 80s. Chance of thunderstorms 60 percent.
  • Tuesday Night Thunderstorms likely in the evening...then a chance of thunderstorms after midnight. Some thunderstorms may produce heavy rainfall. Lows in the upper 50s. North winds 10 to 15 mph in the evening becoming light. Chance of thunderstorms 70 percent.
  • Wednesday Cloudy with a 50 percent chance of thunderstorms. Some thunderstorms may produce heavy rainfall. Highs 68 to 74.
  • Wednesday Night Mostly cloudy with a 30 percent chance of thunderstorms. Lows in the lower to mid 50s.
  • Thursday Partly cloudy with a 30 percent chance of thunderstorms. Highs in the mid to upper 70s.
  • Thursday Night Mostly cloudy with a 20 percent chance of thunderstorms. Lows near 60.
  • Friday And Friday Night Mostly cloudy. A 20 percent chance of thunderstorms. Highs in the mid to upper 70s. Lows in the mid 50s to lower 60s.
  • Saturday And Saturday Night Partly cloudy with a 20 percent chance of thunderstorms. Highs in the mid 70s to lower 80s. Lows near 60.
  • Sunday Partly cloudy with a 10 percent chance of thunderstorms. Highs near 80.
  • Sunday Night Mostly cloudy with a 10 percent chance of thunderstorms. Lows near 60.
  • Monday Partly cloudy with a 10 percent chance of thunderstorms. Highs near 80. =