Special weather statement from the National Weather Service:
Confidence is increasing for a severe weather event for Monday afternoon through late Monday evening. We’ve updated some of our graphics and wording since the highest potential for severe thunderstorms has shifted southward and has a expanded in area a bit across the eastern Wyoming plains and western Nebraska.
For this evening: A few strong to severe thunderstorms are still possible mainly along the I-25 corridor, including Laramie, Cheyenne, and Wheatland. Large hail appears to be the main threat. This threat may linger into the overnight hours.
Monday: Confidence is medium-high for severe storms on Monday as a very strong low pressure system tracks over the Rockies. The best chance for severe weather will be over southeast Wyoming from just west of the Laramie Range eastward in the afternoon and evening, and then in the Nebraska Panhandle during the evening. Storms should quickly end from west to east by midnight as a strong cold front blasts eastward.
• Although low clouds and fog appear less likely Monday morning, there is a still a chance for low clouds to develop along and east of Interstate 25. The rate at which this cloud cover dissipates will determine the coverage and intensity of storms in the later afternoon and evening. There is a possibility there will be very little low clouds at all early Monday morning since showers and thunderstorms this evening will likely influence distribution of low level moisture.
Tornadoes, very large hail, heavy rain with higher potential for flash flooding, and strong winds are all possible with the storms that develop on Monday. There is the chance for one or two strong tornadoes across far eastern Wyoming and western Nebraska Monday afternoon and evening; after the afternoon analysis today, we can not rule this out.
Please do not hesitate to contact us at 307-772-2227 if you have any questions or concerns about the potential severe weather over the next couple of days. Also, keep an eye on our social media outlets and regular forecast products for updates, including any severe weather watches and warnings.