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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Hazardous Weather Conditions

Current Conditions

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Sinclair WY

7 Day Forecast

For More Weather Information:

Cheyenne, WY Local Forecast Office

Tonight

Heavy Rain Chance for Measurable Precipitation 20%

Heavy
Rain

Low: 14 °C

Tuesday

Showers Likely Chance for Measurable Precipitation 60%

Showers
Likely

High: 23 °C

Tuesday
Night

Chance Showers Chance for Measurable Precipitation 50%

Chance
Showers

Low: 11 °C

Wednesday

Chance Showers Chance for Measurable Precipitation 30%

Chance
Showers

High: 22 °C

Wednesday
Night

Partly Cloudy

Partly
Cloudy

Low: 9 °C

Thursday

Mostly Sunny

Mostly
Sunny

High: 24 °C

Thursday
Night

Partly Cloudy

Partly
Cloudy

Low: 12 °C

Friday

Slight Chance Thunderstorms

Slight Chc
Thunderstorms

High: 26 °C

Friday
Night

Slight Chance Thunderstorms

Slight Chc
Thunderstorms

Low: 12 °C

Detailed Forecast

  • Tonight Isolated showers and thunderstorms before 9pm. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 14. East southeast wind 10 to 15 km/h. Chance of precipitation is 20%.
  • Tuesday A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a high near 23. East northeast wind 10 to 15 km/h increasing to 20 to 25 km/h in the afternoon. Chance of precipitation is 60%. New rainfall amounts between 7.5 mm and 1 cm possible.
  • Tuesday Night A chance of showers and thunderstorms. Mostly cloudy, with a low around 11. East northeast wind 15 to 25 km/h. Chance of precipitation is 50%.
  • Wednesday A 30 percent chance of showers before noon. Partly sunny, with a high near 22. East wind 15 to 20 km/h.
  • Wednesday Night Partly cloudy, with a low around 9. East wind 10 to 20 km/h.
  • Thursday Mostly sunny, with a high near 24.
  • Thursday Night Partly cloudy, with a low around 12.
  • Friday A slight chance of showers and thunderstorms. Mostly sunny, with a high near 26.
  • Friday Night A slight chance of showers and thunderstorms. Partly cloudy, with a low around 12.
  • Saturday Mostly sunny, with a high near 27.
  • Saturday Night Partly cloudy, with a low around 12.
  • Sunday Mostly sunny, with a high near 27.
  • Sunday Night Mostly clear, with a low around 13.
  • Monday A slight chance of showers and thunderstorms. Mostly sunny, with a high near 28.