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Heat wave set to scorch Cheyenne starting tomorrow

Bump Sullivan Reservoir in Goshen County (Wyoming Game and Fish Department, Twitter)

CHEYENNE, Wyo. — A potentially significant heat wave is likely to affect Cheyenne from Thursday through Monday, according to the National Weather Service in Cheyenne.

“Forecast remains on track through the end of the week with a few minor tweaks to [probability of precipitation] and weather,” said Timothy Trudel, NWS lead forecaster. The strong upper-level high over Nevada will drift eastward into Utah today and Thursday. Afternoon temperatures will increase noticeably today, reaching the upper 80s to mid-90s.

The heat wave will begin Thursday. “Expect highs well into the 90s for most locations,” Trudel added. Chadron, Scottsbluff and Torrington may see temperatures between 98 and 102 degrees.

High-based showers and thunderstorms are possible over the mountains and adjacent valleys today. “A little more uncertainty exists for Thursday,” Trudel noted, with a dry-line feature developing across the eastern high plains. Strong thunderstorms may develop along this boundary in the afternoon.

A hot day is expected Friday as the upper-level high pushes into western Colorado and southwest Wyoming. “Surface temperatures will be in the mid- to upper 90s, reaching as high as 102 for western Nebraska,” Trudel said.

Brandon Wills, NWS meteorologist, added that “Hot temperatures continue to be well advertised in the long-term forecast.” Daytime highs may exceed 90–100 degrees for areas east of the Laramie Range for up to a week. The upper-level ridge will be entrenched across the Four Corners area by Friday evening.

Persistent hot temperatures with little overnight relief could prompt heat advisories. “Overnight lows across areas east of the Laramie Range are forecast to remain in the 60s,” Wills said. If overnight lows do not dip below 70 degrees, heat-related headlines are likely.

Isolated rain showers and thunderstorms may occur over the weekend, but high subsidence and dry air make this unlikely. High-based clouds and thunderstorm activity are more likely by Monday and Tuesday.

Residents should take frequent breaks and stay hydrated if outdoors this weekend and early next week. Monsoon moisture returning early next week should help limit daytime highs, although temperatures will remain above average. “We will continue to monitor trends regarding the potential for monsoon moisture,” Wills concluded.

Detailed Forecast for Cheyenne

  • Today: It will be sunny, with a high near 88. A northwest wind will shift to the east in the afternoon at 5–10 mph.
  • Tonight: Expect mostly clear skies, with a low around 56. An east wind will shift to the west after midnight at 5–15 mph.
  • Thursday: It will be sunny and hot, with a high near 93. A west wind will shift to the northeast in the afternoon at 5–10 mph.
  • Thursday Night: The weather will be mostly clear, with a low around 59. A east-northeast wind will shift to the west-southwest after midnight at around 5 mph.
  • Friday: It will be sunny and hot, with a high near 97. A west-northwest wind will shift to the north in the afternoon at around 10 mph.
  • Friday Night: Expect mostly clear skies, with a low around 60.
  • Saturday: It will be sunny and hot, with a high near 96.
  • Saturday Night: The weather will be partly cloudy, with a low around 62.
  • Sunday: There is a slight chance of showers and thunderstorms after noon. It will be mostly sunny and hot, with a high near 98.
  • Sunday Night: There is a slight chance of showers and thunderstorms before midnight. It will be mostly cloudy, with a low around 64.
  • Monday: There is a chance of showers and thunderstorms. It will be partly sunny and hot, with a high near 93.
  • Monday Night: There is a chance of showers and thunderstorms. It will be mostly cloudy, with a low around 60.
  • Tuesday: Showers and thunderstorms are likely. It will be partly sunny, with a high near 87.

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