STP 05-30-2015: Storms Coverage Decreased, But Still Several Heavy Rain Makers

Issue Date: Saturday, May 30th, 2015
Issue Time: 9:00 AM MDT


The tail end of a multi-day disturbance brought scattered showers and thunderstorms across Colorado on Friday. While most storms looked more intimidating than they actually were, several storms over the Palmer Ridge and Southeast Plains produced very heavy rainfall. Fortunately the rainfall was brief and did not cause any flooding problems. For example, an observer in El Paso county noted 0.25 inches fell in 6 minutes (the equivalent of 2.50 inches per hour). These storms were also responsible for several hail reports, up to 1 inch in diameter. In all, about a handful of 1+ inch rainfall amounts were noted across El Paso and Pueblo counties. Meanwhile, several rounds of mostly weak storms amounted to 0.5 to 0.9 inches of rainfall across Weld and Larimer counties. Aside from this action, most everyone else experienced less than 0.5 inches of rainfall.

The South Platte River continued to subside below Minor flood stage. However, parts of the Arkansas River remained in Minor flood stage, receiving a short-term boost from yesterday’s rainfall in the upstream regions.

Snowmelt was ongoing with the warm conditions. Interestingly, though, an inspection of SNOTEL data across each of the eight major drainage basins revealed that seven of the eight had an above average snowpack for this time of year. The one exception was the Yampa / White River basin, but even there conditions were very close to what is expected for late May. This is certainly quite a welcome change from a month ago when the western parts of the state were experience a serious snowpack “drought”.

No flash flooding was reported yesterday. Please check the map below for estimated rainfall in your area.