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Warming Trend Ahead as Winter System Weakens

May 11th, 2021
A slight ridging pattern will build into the jet stream as the trough bringing the winter...
A slight ridging pattern will build into the jet stream as the trough bringing the winter weather propagates eastward. Thursday will be the most pleasant day of the week as the ridge reaches its peak ahead of a weak trough that brings thunderstorms into the weekend.(KGWN)
Updated: May. 11, 2021 at 12:03 PM CDT
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It’s still a messy day out there in Laramie County as a light snowfall persists. It’s too warm outside to accumulate, but as of the late AM hours it’s still to cold to shift to rain. Laramie has seen the snow clear out early which has allowed for an early jump in temperatures. Laramie County remains the cold spot across Wyoming heading into the lunchtime hours, and that includes Yellowstone. Warmer conditions are on the way, however it will take an extra day for Cheyenne and Laramie to catch up with most of the state thanks to this system that continues to hang over Colorado, albeit a bit weaker now than yesterday.

This afternoon things will warm up for the majority of the state. This will only be slight for Cheyenne, and may only be enough to shift into a bit of a wintry mix into the afternoon hours. Outside of Southeast Wyoming some isolated rain showers will be possible, with Northeast Wyoming likely to see the majority of those. With the system breaking down overnight and some sunshine returning tomorrow temperatures will jump about 20 degrees in the Capital City and Laramie. It will still be almost 10 degrees cooler than many other places around the state, such as Sheridan or Thermopolis that will be up into the mid 60s. Casper is expected to be in the low 60s during the afternoon hours of Wednesday with pockets of sunshine as scattered clouds fill right back in. Scattered showers (and storms for warmer areas) are expected Wednesday as well, primarily in the eastern third of Wyoming. A few showers and storms may occur in the central third of the state as well.

Thursday will be the most pleasant day of the week, but unlike last Thursday where there wasn’t a cloud in the sky, we have no fully sunny days in the near future. The day will kick off quite pleasantly with clear skies before cloud cover once again fills in during the afternoon hours. That pattern will persist through the weekend and much of next week as the jet stream builds a slight ridging pattern overhead, allowing for warmer temperatures to stick around. Thursday, however, will be the day this week with the lowest chance of rain, with only a few isolated showers expected in Eastern and Central Wyoming. Thursday is also expected to be the warmest day of the week, but only by a degree or two.

Come Friday and into the weekend a slight dip in the jet stream will drop temperatures by only a few degrees, and sunshine is still expected during the early hours of the day. During the afternoon and evening clouds will again fill in, only this time more widespread thunderstorms are expected thanks to a mild trough propagating in from the west. This will create some instability, and there will be some opportunities for some strong to severe thunderstorms in the Cowboy State, especially for the warmest areas. The primary risks will be small hail and strong wind gusts. In order for more powerful severe storms to be possible, high temperatures will need to be up into the upper 70s and towards the mid 80s. As of now forecast highs for Friday and into the weekend are expected to hang around the upper 60s and lower 70s.

The “clear start PM clouds and storms” pattern will be sticking around for the next several days; all through the weekend and part of next week. It will feel nice outside with the spring warmth, and all of the storm opportunities could bring more drought relief to Wyoming, although on any given day nowhere will be guaranteed to see one of the storms. All rain from now through next Tuesday at 6:00 am MDT will be reflected on next weeks drought monitor.

CHEYENNE, Wyo. (Wyoming News Now) -

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