CHEYENNE, Wyo. — Scattered to numerous showers and thunderstorms are expected in Cheyenne this afternoon and evening, with storms capable of producing torrential rainfall, gusty winds and isolated large hail.
The National Weather Service in Cheyenne reports that rain has already been observed this morning, with Cheyenne Automated Surface Observing Systems recording over an inch in the past six to seven hours. Rainfall rates are averaging about 0.3–0.4 inches per hour, with more storms expected to develop this afternoon.
A secondary shortwave will approach this afternoon, leading to further storm development. The heaviest rainfall is anticipated along the Interstate 80 corridor, where abundant rainfall has already occurred. These showers and thunderstorms are expected to continue overnight as the shortwave trough moves through the area.
On Wednesday, a similar pattern will repeat as a trough remains over the region. While the heavy rainfall potential will decrease, showers and thunderstorms will persist through the day and into Thursday.
The long-term forecast indicates that showers and thunderstorms will be most likely on Friday, Sunday and Monday, with drier conditions expected for Saturday. Temperatures will remain near normal, with highs in the 80s.
Detailed Forecast for Cheyenne
- Today: There is a chance of rain and thunderstorms before 1 p.m., with showers likely and a thunderstorm possible between 1 and 3 p.m. Showers and thunderstorms are likely after 3. The day will be partly sunny, with a high near 81. Winds will come from the west-southwest at 5–10 mph. The chance of precipitation is 70%. New rainfall amounts will range between a tenth and a quarter of an inch, with higher amounts possible in thunderstorms.
- Tonight: Showers and thunderstorms are likely before midnight, followed by a chance of rain and thunderstorms between midnight and 3 a.m., then a chance of rain. Some storms could be severe. The night will be mostly cloudy, with a low around 56. Winds will come from the west at 5–10 mph. The chance of precipitation is 60%, with new rainfall amounts between a quarter and half of an inch possible.
- Wednesday: There is a 50% chance of showers and thunderstorms after noon. The day will be partly sunny, with a high near 80. Winds will come from the west-northwest at 10–15 mph.
- Wednesday Night: There is a 30% chance of showers and thunderstorms before midnight. The night will be mostly cloudy, gradually becoming mostly clear, with a low around 51. Winds will come from the west-northwest at 5–10 mph.
- Thursday: There is a 30% chance of showers and thunderstorms after noon. The day will be mostly sunny, with a high near 79. Winds will come from the northwest at around 10 mph.
- Thursday Night: There is a chance of showers and thunderstorms before midnight, followed by a slight chance of showers. The night will be partly cloudy, with a low around 52. The chance of precipitation is 30%.
- Friday: There is a 30% chance of showers and thunderstorms after noon. The day will be sunny, with a high near 85.
- Friday Night: The night will be mostly clear, with a low around 54.
- Saturday: There is a slight chance of showers and thunderstorms after noon. The day will be sunny, with a high near 89.
- Saturday Night: The night will be partly cloudy, with a low around 57.
- Sunday: There is a chance of showers and thunderstorms. The day will be mostly sunny, with a high near 86.
- Sunday Night: There is a slight chance of showers and thunderstorms. The night will be partly cloudy, with a low around 57.
- Monday: There is a chance of showers and thunderstorms. The day will be mostly sunny, with a high near 85.
