The Cheyenne Office of the National Weather Service says unsettled weather is likely for southeast Wyoming through this week, with some severe weather possible.

The agency posted the following on it's website:

An unsettled forecast is expected for southeast Wyoming and Nebraska Panhandle through the end of next week. Severe thunderstorms are possible east of the Laramie Range today and Memorial Day Monday. Increasing chances for widespread afternoon and evening thunderstorms after Wednesday. The good news with all these storms is that our drought status is improving markedly over the past week or so.

Here is the forecast for Cheyenne:

Today
A slight chance of showers between 11am and noon, then a chance of showers and thunderstorms after noon. Increasing clouds, with a high near 69. West wind around 10 mph becoming south in the afternoon. Chance of precipitation is 50%.
Tonight
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 46. South southeast wind 5 to 10 mph becoming west after midnight. Chance of precipitation is 20%.
Memorial Day
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 73. West wind around 10 mph becoming south in the afternoon.
Monday Night
Partly cloudy, with a low around 46. South wind 5 to 10 mph becoming west after midnight.
Tuesday
A 50 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 74. West wind 5 to 10 mph becoming south in the afternoon.
Tuesday Night
A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 47.
Wednesday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 73. Chance of precipitation is 70%.
Wednesday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 47.
Thursday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 69.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 48.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 67.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 48.
Saturday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 64.
Here is the Laramie forecast:
Today
A slight chance of showers between 11am and noon, then a chance of showers and thunderstorms after noon. Increasing clouds, with a high near 69. West wind around 10 mph becoming south in the afternoon. Chance of precipitation is 50%.
Tonight
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 46. South southeast wind 5 to 10 mph becoming west after midnight. Chance of precipitation is 20%.
Memorial Day
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 73. West wind around 10 mph becoming south in the afternoon.
Monday Night
Partly cloudy, with a low around 46. South wind 5 to 10 mph becoming west after midnight.
Tuesday
A 50 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 74. West wind 5 to 10 mph becoming south in the afternoon.
Tuesday Night
A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 47.
Wednesday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 73. Chance of precipitation is 70%.
Wednesday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 47.
Thursday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 69.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 48.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 67.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 48.
Saturday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 64.