SPM 07-29-2017: Slow Moving Storms Drop Widespread Precipitation

Issue Date: Saturday, July 29, 2017
Issue Time: 09:55AM MDT

Summary:

As expected, there were two separate areas of action yesterday. The first was over the high country and the second was along a boundary over the eastern plains. There were several Areal Flood Advisories and a couple Flash Flood Warnings. Over the mountains, the thunderstorm activity favored the San Juan Mountains, Central Mountains, Southeast Mountains and southern Front Range. 24-hour rain totals from CoCoRaHS stations were as high as 1 inch with radar storm total estimates at 2 inches. The San Miguel Sheriff’s Office reported a debris flow across CO 62 and CO 145 due to the steady rainfall over the course of day.

As storms began to sluggishly move off the higher terrain, the southern Urban Corridor was favored due to the enhanced lift of the Palmer Ridge. The UDFCD Willow Creek gage captured 1.1 inches in 30-min. In El Paso County, a CoCoRaHS station reported 1.75 inches of rain. Storm totals were estimated by radar to be as high as 3 inches. Outflow boundaries helped trigger additional thunderstorm activity, but most of these storms were short-lived.

Further east over the plains, storm motion was slow and storms eventually made their way to the SE corner of the state. CoCoRaHS gages captured up to 1.6 inches of rain, with radar estimates up to 5 inches. A Flash Flood occurred over Las Animas County at 10pm with 2 feet of water reported over the roads. Activity over the mountains began to dissipate around 11PM and the cluster of storms over the SE corner of the state moved out early this morning.

To see how much rain fell in your neighborhood the last 24-hours, check out the State Precipitation Map below.

Storm Total Precip Legend