Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

A potent and very moist spring storm produced heavy rain and snow across much of north central and northeast Colorado from May 17th through the 19th. Precipitation amounts across the I-25 Urban Corridor ranged between 1.5 and 4 inches. Greeley received between 4 and 5 of precipitation with some parts of town measuring over 5.5 inches. In addition, this storm produced very heavy snow over the northern Colorado mountains and foothills with amounts ranging between 1 and 4 feet. The highest snowfall totals occurred over the foothills of Boulder and Larimer Counties. On the plains, rain changed to snow along the I-25 corridor early Thursday morning, with accumulating snow falling Thursday and Thursday night. Some tree damage occurred with several inches of snow accumulating from Fort Collins southward through Boulder and the western suburbs of Denver, down onto the Palmer Divide.

Lily Lake (just south of Estes Park in Larimer County) Thursday afternoon.

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Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

May 17-19, 2017 Spring Storm Wrap-up for Northeast and North Central Colorado