The Cheyenne Office of the National Weather Service says locally heavy rainfall is possible in southeast Wyoming today and Thursday.

Small hail and strong winds are also possible with the storms.

The agency posted the following on it's website this morning:

Scattered to numerous showers and thunderstorms are expected to develop this afternoon and may bring locally heavy rainfall. Parts of our area are included in a Marginal risk for excessive rainfall both today and tomorrow from the Weather Prediction Center. Small hail and gusty winds will also be possible.

Here is the Cheyenne forecast:

Today
A slight chance of showers, then showers and thunderstorms likely after noon. Areas of dense fog before 9am. Otherwise, mostly cloudy, with a high near 71. South southeast wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely before 9pm, then showers likely and possibly a thunderstorm between 9pm and midnight. Mostly cloudy, with a low around 49. South wind 10 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 72. South southeast wind 5 to 15 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 51. South southeast wind 10 to 15 mph.
Friday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 72. Breezy, with a south southeast wind 10 to 20 mph. Chance of precipitation is 70%.
Friday Night
A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 48. Breezy.
Saturday
Showers likely and possibly a thunderstorm after noon. Mostly sunny, with a high near 73. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 47.
Sunday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75.
Sunday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 47.
Memorial Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 75.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 48.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 76.
Here is the Laramie forecast:
Today
A slight chance of showers, then showers and thunderstorms likely after noon. Areas of dense fog before 9am. Otherwise, mostly cloudy, with a high near 71. South southeast wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely before 9pm, then showers likely and possibly a thunderstorm between 9pm and midnight. Mostly cloudy, with a low around 49. South wind 10 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 72. South southeast wind 5 to 15 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 51. South southeast wind 10 to 15 mph.
Friday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 72. Breezy, with a south southeast wind 10 to 20 mph. Chance of precipitation is 70%.
Friday Night
A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 48. Breezy.
Saturday
Showers likely and possibly a thunderstorm after noon. Mostly sunny, with a high near 73. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 47.
Sunday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75.
Sunday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 47.
Memorial Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 75.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 48.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 76.

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