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Scattered thunderstorms today; stronger storms expected Friday

A rainbow appears after a rainstorm in Vedauwoo Campground near Buford, Wyo., on Aug. 6, 2020. (Dan Cepeda, Oil City)

CHEYENNE, Wyo. — Cheyenne will experience seasonable warmth today, with scattered showers and thunderstorms expected this afternoon and early evening. While severe weather is not likely, a few stronger storms cannot be ruled out, especially in the southern areas, according to the National Weather Service in Cheyenne.

Friday’s forecast brings a higher chance of strong to severe thunderstorms across southeast Wyoming and the western Nebraska Panhandle. Torrential rainfall and potential flash flooding are primary concerns. Large hail and damaging winds are possible early in the afternoon before storms merge.

Saturday will likely start with calmer weather. However, isolated high-based showers are possible in the Laramie Range and east-central Wyoming. A surface frontal boundary on Sunday morning might squeeze surface moisture into a narrow band, possibly causing severe weather in the high plains.

Monday and Tuesday may see increased precipitation and thunderstorm chances as a robust trough moves through the northern Rockies. This system’s position will determine the severity of storms. Returning moisture and increasing southwest surface flow west of the Laramie Range could lead to high winds over south-central Wyoming.

Tuesday looks more favorable for thunderstorms due to the proximity of faster flow aloft. Any southward shift of the low-pressure system could increase the severe weather threat for eastern Wyoming and western Nebraska.

Temperatures will be above normal this weekend, gradually cooling early next week. Confidence is high in the temperature forecast, but precipitation predictions remain uncertain due to variable model guidance.

Detailed Forecast for Cheyenne

  • Today: There is a 40% chance of showers and thunderstorms after noon. The weather will be mostly sunny, with a high near 84. A northwest wind at 10–15 mph will shift to the east in the afternoon.
  • Tonight: There is a 20% chance of showers and thunderstorms before midnight. The sky will be partly cloudy, with a low around 55. An east wind around 10 mph will shift to the south after midnight.
  • Friday: Showers and thunderstorms are likely after noon. The weather will be mostly cloudy, with a high near 81. There will be a south wind at 10–15 mph. The chance of precipitation is 60%.
  • Friday Night: Showers and thunderstorms are likely before midnight. The sky will be mostly cloudy, with a low around 55. A south wind at 5–10 mph will shift to the west after midnight. The chance of precipitation is 60%.
  • Saturday: There is a 20% chance of showers and thunderstorms after noon. The weather will be mostly sunny, with a high near 88. There will be a west-northwest wind around 10 mph.
  • Saturday Night: The sky will be mostly clear, with a low around 55.
  • Sunday: The weather will be sunny, with a high near 86. It will be breezy.
  • Sunday Night: The sky will be partly cloudy, with a low around 52.
  • Monday: There is a slight chance of showers and thunderstorms after noon. The weather will be mostly sunny, with a high near 82.
  • Monday Night: There is a slight chance of showers before midnight. The sky will be partly cloudy, with a low around 50.
  • Tuesday: There is a slight chance of showers and thunderstorms. The weather will be sunny, with a high near 78.
  • Tuesday Night: There is a slight chance of showers and thunderstorms. The sky will be partly cloudy, with a low around 48.
  • Juneteenth: There is a slight chance of showers and thunderstorms. The weather will be mostly sunny, with a high near 74.

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