Off to Cheyenne, Wyoming for the forecast today. I was just there in October, for a weekend that ended with random snow.
At 253PM, MT, Cheyenne was reporting a temperature of 57 degrees with mostly cloudy skies, though that was a temporary affliction, with some high clouds presently blotting the sun. There was a weak ridge building over the Rockies and the front range at the surface, but a deep, inevitably dangerous trough was the overriding factor. A weak wave in the jet was the culprit for some strong storms today, but the deeper trough sweeping into the Plains will be the greatest concern going forward.
Tomorrow, an additional area of low pressure will explode across the central Plains as the mean trough descends into the center of the country. Cold air will be drawn into the area, as well as moisture, which will wrap around the system into Cheyenne. Most of the day tomorrow will be inundated by rain, though cooler temperatures overnight Saturday into Sunday will mean a distinct threat for snow in the early morning on Sunday. The precipitation will change back to rain, however, and no measurable accumulation is expected.
Tomorrow – Rain likely, High 46, Low 37
Sunday – Morning snow, changing to heavy rain, High 46, Low 32
TWC: Tomorrow – A few showers early then thundershowers developing in the afternoon. High 50, Low 37
Sunday – Rain and snow showers in the morning. A shower or two in the afternoon – otherwise, mostly cloudy High 47, Low 33
AW: Tomorrow – Cloudy with a shower High 52, Low 37
Sunday – Mostly cloudy, breezy and colder; rain and snow showers in the morning, then a few showers High 40, Low 33
NWS: Tomorrow – Showers likely, mainly after noon. Mostly cloudy High 51, Low 35
Sunday – Occasional snow. High 35, Low 31
WB: Tomorrow – Cloudy with rain showers likely. Cooler. high 51, Low 35
Sunday – Occasional snow in the morning…then snow and rain likely in the afternoon. Windy…colder. Moderate snow accumulations high 35, Low 31