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High pressure brings sun, warm temps to Gillette, if for a day

Interstate 90 in Gillette on May 22, 2024. (Wyoming Department of Transportation)

GILLETTE, Wyo. — High pressure has situated over northeastern Wyoming today, meaning sun and warmth after a few dreary days.

The National Weather Service in Rapid City, South Dakota, has forecast a high of 64 today under mostly sunny skies. Winds will come from the southwest at 8–16 mph with gusts of up to 26 mph. Skies will become partly cloudy tonight as the low drops to around 41. A 20% chance for showers creeps into the forecast before dawn Thursday as a strong area of low pressure crosses the area.

An active period of weather follows the low through the Memorial Day weekend. That’ll start Thursday with a 70% chance of rain in Gillette. The forecast high is 56. The day will remain mostly cloudy with winds from the southwest at 9–19 mph picking up to 19–29 mph. Gusts could reach 41 mph.

As nightfall comes, the 70% chance for rain becomes a 70% chance of rain and snow after 9 p.m. as the low falls to around 32. Breezy conditions will continue with a northwest wind at 23–29 mph and gusts of up to 41 mph. Little or no snow accumulation is expected, according to the forecast.

Friday will see the sun return and the mercury climb to 61. Winds will come from the west at 17–22 mph but decrease to 9–14 mph in the afternoon. Overnight, a partly cloudy sky is expected overhead as the low falls to around 39.

Saturday will be warmer, with a high near 67 under mostly sunny skies. Showers and thunderstorms will be possible later in the day and overnight. The low will be near 41.

More storms are possible on Sunday as the high returns to 58; chances are best between noon and midnight. A partly cloudy night is expected to see a low of 41.

Memorial Day itself should be sunny in Gillette with a high near 66, followed by a sunny Tuesday with a high of 76.

More on the weather is available from the National Weather Service in Rapid City.