National Weather Service United States Department of Commerce

Heavy rain and mountain snow across the northwestern U.S. this weekend

A Pacific storm system will continue to impact the West Coast through Sunday. Heavy rainfall could lead to flash flooding, river and small stream flooding, as well as mudslides and debris flows, especially over burn scars. At higher elevations, strong winds and heavy snowfall, with accumulations of 1 to 3 feet, could result in hazardous travel through mountain passes.
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Hazardous Weather Conditions

Current Conditions

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Guernsey WY

7 Day Forecast

For More Weather Information:

Cheyenne, WY Local Forecast Office

Tonight

Mostly Cloudy

Mostly
Cloudy

Low: -2 °C

Sunday

Chance Rain Chance for Measurable Precipitation 30%

Chance
Rain

High: 8 °C

Sunday
Night

Chance Rain/Snow Chance for Measurable Precipitation 40%

Chance
Rain/Snow

Low: -1 °C

Monday

Chance Rain/Snow Chance for Measurable Precipitation 30%

Chance
Rain/Snow

High: 4 °C

Monday
Night

Slight Chance Snow Chance for Measurable Precipitation 20%

Slight Chc
Snow

Low: -6 °C

Tuesday

Partly Sunny

Partly
Sunny

High: 2 °C

Tuesday
Night

Partly Cloudy

Partly
Cloudy

Low: -6 °C

Wednesday

Partly Sunny

Partly
Sunny

High: 5 °C

Wednesday
Night

Slight Chance Snow

Slight Chc
Snow

Low: -4 °C

Detailed Forecast

  • Tonight Mostly cloudy, with a low around -2. West southwest wind 15 to 25 km/h.
  • Sunday A 30 percent chance of rain, mainly after 5pm. Mostly cloudy, with a high near 8. Breezy, with a west wind 30 to 35 km/h, with gusts as high as 45 km/h.
  • Sunday Night A chance of rain before 8pm, then a chance of snow. Mostly cloudy, with a low around -1. West northwest wind around 25 km/h. Chance of precipitation is 40%.
  • Monday A chance of snow before 11am, then a chance of rain and snow. Mostly cloudy, with a high near 4. Breezy, with a northwest wind 30 to 40 km/h, with gusts as high as 55 km/h. Chance of precipitation is 30%.
  • Monday Night A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around -6. Blustery, with a northwest wind 25 to 35 km/h, with gusts as high as 45 km/h.
  • Tuesday Partly sunny, with a high near 2.
  • Tuesday Night Partly cloudy, with a low around -6.
  • Wednesday Partly sunny, with a high near 5.
  • Wednesday Night A slight chance of snow. Mostly cloudy, with a low around -4.
  • Christmas Day A chance of snow. Mostly cloudy, with a high near 3.
  • Thursday Night A slight chance of snow. Mostly cloudy, with a low around -10.
  • Friday Partly sunny, with a high near -3.
  • Friday Night Partly cloudy, with a low around -12.
  • Saturday Mostly sunny, with a high near 0.