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Cheyenne braces for record-high temperatures, fire weather concerns

Elk Mountain 7/3/21 (WYDOT)

CHEYENNE, Wyo. — A potentially significant heat wave is expected to impact the region later this week, according to the National Weather Service in Cheyenne.

“Generally quiet and benign weather [is] expected through the middle of the week with a gradual warming trend,” Timothy Trudel, NWS lead forecaster, said. Highs will be in the 80s nearing 90 degrees for most locations.

On Wednesday and Thursday, temperatures will start to rise as a dominant upper-level high moves eastward. “Expect high temperatures on Thursday to already begin pushing 100 degrees across portions of the area,” Trudel said. Widespread mid- to upper 90s are expected elsewhere.

A few thunderstorms may develop near the mountains, especially close to the Colorado border, due to natural upslope easterly winds across the high plains. However, “much of this rainfall [may not] reach the ground,” Trudel said, due to low surface dew points.

Looking ahead, “much above average temperatures are expected,” NWS Meteorologist Brandon Wills said, adding that the potential exists for “daytime highs to meet or exceed 90 degrees for areas east of the Laramie Range for up to a week.”

Cheyenne could see daytime highs in the upper 90s, potentially reaching 100 degrees, by Sunday and Monday, which would “tie the all-time record high temperature for the city.” Persistent hot temperatures with little relief during the overnight hours could “cause concerns for possible heat advisories or even excessive heat headlines,” Wills added.

Hot and dry conditions will prevail until monsoon moisture potentially returns late in the weekend or early next week. Elevated to near-critical fire weather concerns may arise as a result. “The very hot temperatures will quickly dry the region out,” Wills said. Relief may come by midweek with a gradual decrease in excessive heat, though it will still remain quite warm.

Detailed Forecast for Cheyenne

  • Today: It will be sunny, with a high near 84. A northwest wind will blow at 5–10 mph, shifting to the north-northeast in the afternoon.
  • Tonight: Expect mostly clear skies, with a low around 53. A north-northeast wind will blow at 5–10 mph, shifting to the west-northwest in the evening.
  • Wednesday: It will be sunny, with a high near 88. A northwest wind will blow at 5–10 mph, shifting to the east-southeast in the afternoon.
  • Wednesday Night: The weather will be mostly clear, with a low around 56. A south-southeast wind will blow at 5–10 mph, shifting to the west after midnight.
  • Thursday: It will be sunny and hot, with a high near 95. A west wind will blow at 5–10 mph, shifting to the northeast in the afternoon.
  • Thursday Night: Expect mostly clear skies, with a low around 61.
  • Friday: It will be sunny and hot, with a high near 98.
  • Friday Night: The weather will be mostly clear, with a low around 62.
  • Saturday: It will be sunny and hot, with a high near 97.
  • Saturday Night: Expect partly cloudy skies, with a low around 63.
  • Sunday: There is a slight chance of showers and thunderstorms. It will be mostly sunny and hot, with a high near 98.
  • Sunday Night: Skies will be partly cloudy, with a low around 63.
  • Monday: There is a chance of showers and thunderstorms. It will be mostly sunny and hot, with a high near 94.

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