CHEYENNE, Wyo. — Cheyenne residents can expect cooler temperatures with widespread showers and thunderstorms today, according to the National Weather Service in Cheyenne. Accumulating snow is likely above 8,000 feet, with a rain and snow mix possible down to 6,000 feet late Tuesday night and into early Wednesday morning. Patchy frost is expected on Wednesday morning as temperatures hover near or below freezing. Recently planted vegetation may need covering to prevent frost damage.
Chilly temperatures, scattered rain showers, and patchy, dense fog are present across southeast Wyoming and western Nebraska this morning. Visibility was less than a mile in several locations due to upslope flow and rain showers. The fog is expected to clear by daybreak, but rain showers and cloudy conditions will persist throughout the day.
A shortwave disturbance will bring scattered rain showers and isolated thunderstorms this afternoon into the early evening. Severe weather is not anticipated. Rain and snow showers are expected between 6,500 and 8,000 feet, but significant accumulations are not likely.
Surface high pressure will quickly propagate toward central Colorado by Wednesday morning, causing temperatures to rapidly decrease. Patchy frost is possible in several areas, with overnight lows near the freezing mark. Covering vegetation is recommended to prevent frost damage.
Wednesday will bring a return to seasonal temperatures, with mostly sunny skies and weak upper-level ridging. Daytime highs will range from the low 60s to the mid-70s. Breezy winds are expected as the surface pressure gradient increases, with winds at 700 millibars reaching 46–58 mph. Wind gusts of 50–55 mph are possible in wind-prone regions of southeast Wyoming.
The warmer temperatures will persist through Thursday, with daytime highs in the 60s and 70s. Increasing clouds are expected ahead of the next weather disturbance by Thursday evening.
A strong shortwave trough will move through the area Thursday evening, bringing gusty north and northwest winds. Light afternoon showers are possible on Friday, particularly in the western mountains. The weekend will see more showers as an upper low tracks across the northern region, with cool temperatures continuing through Sunday. Drier weather is expected by Monday as the upper low moves east into eastern Nebraska.
Detailed Forecast for Cheyenne
Today: There is a chance of showers, with thunderstorms also possible after 9 a.m. The weather will be partly sunny, with a high near 54. It will be breezy, with a northwest wind at 10–20 mph. The chance of precipitation is 40%.
Tonight: There is a chance of rain showers before midnight, followed by a chance of sprinkles and flurries between midnight and 3 a.m., and then a chance of flurries after 3 a.m. Some thunder is also possible. Widespread frost is expected mainly after 3 a.m. Otherwise, the sky will be mostly cloudy, gradually becoming mostly clear, with a low around 32. There will be a west wind at 5–15 mph. The chance of precipitation is 30%.
Wednesday: Widespread frost is expected before 7 a.m. Otherwise, the weather will be sunny, with a high near 64. A west wind at 10–15 mph will shift to the south in the afternoon.
Wednesday Night: The sky will be mostly clear, with a low around 39. There will be a south-southwest wind at 5–15 mph.
Thursday: There is a slight chance of showers between noon and 3 p.m., then a slight chance of showers and thunderstorms after 3. The weather will be mostly sunny, with a high near 71. It will be breezy, with a southwest wind at 10–15 mph increasing to 15–20 mph in the afternoon. Winds could gust as high as 30 mph. The chance of precipitation is 20%.
Thursday Night: There is a slight chance of showers and thunderstorms before 9 p.m., then a slight chance of showers between 9 p.m. and midnight. The sky will be mostly cloudy, with a low around 35. It will be breezy. The chance of precipitation is 20%.
Friday: There is a 40% chance of showers and thunderstorms after noon. The weather will be partly sunny, with a high near 60.
Friday Night: There is a chance of showers, mainly before midnight. The sky will be mostly cloudy, with a low around 40.
Saturday: There is a chance of showers, mainly after noon. The weather will be partly sunny, with a high near 68.
Saturday Night: There is a slight chance of showers before midnight. The sky will be partly cloudy, with a low around 43.
Sunday: There is a chance of showers. The weather will be partly sunny, with a high near 67. It will be breezy.
Sunday Night: There is a chance of showers. The sky will be partly cloudy, with a low around 40. It will be breezy.
Memorial Day: There is a slight chance of showers. The weather will be mostly sunny, with a high near 69.
