SPM 05-31-2020: Heavy Rainfall and Flash Flooding for Pueblo and Fremont Counties

Issue Date: Sunday, May 31st, 2020
Issue Time: 10:05AM MDT

Summary:

It was setting up to be heavy rainfall day with dew points in the 50Fs and slow steering winds, but the rain rates over Pueblo County were more than impressive. It looks like radar estimated up to 3 inches of rain in both Pueblo and El Paso! The Young Hallow station at Fort Carson was the day’s big winner. It recorded 1.80 inches for the day with 0.72 inches falling in 10 min, which is between at 10-year and 25-year event. A CoCoRaHS station in downtown Pueblo recorded 1.88 inches. Not surprisingly, this caused some flooding issues:

  • Roads washed out in Midway Ranches neighborhood
  • Water overtopping I-25 at mile marker 104
  • Water breaching banks along Four Mile Creek
  • 3 to 4 inch deep water flowing over Pueblo Blvd and Highway 50
  • Damage to the shoulder of I-25
  • Multiple manhole covers dislodged
  • Cars stalled in flood waters

Over the Front Range, storms remained somewhat capped during the afternoon hours, which kept the flood threat lower. None the less, MRMS and Stage IV QPE had between 1 and 1.5 inches of rain along the Divide in Larimer, Boulder, Gilpin and Clear Creek Counties. These estimates were both a little higher than MetStorm Live (below). Hail was also reported in Fort Collins around 6:30PM that was just under an inch in diameter with a stronger storm that formed and dropped around a half an inch of rain. The San Juan Mountains got between 0.25 to 1 inch of rainfall, as well as small hail and wind gusts (downdraft outflow) around 50 mph.

For precipitation estimates in your neighborhood over the last 24-hours, scroll down to the State Precipitation Map below. Reminder, you can also report any flooding to our website: https://www.coloradofloodthreat.com/?page_id=11165

Click Here For Map Overview

The map below shows radar-estimated, rainfall gage-adjusted Quantitative Precipitation Estimates (QPE) across Colorado. The map is updated daily during the operational season (May 1 – Sep 30) by 11AM. The following six layers are currently available: 24-hour, 48-hour and 72-hour total precipitation, as well as maximum 1-hour, 2-hour and 6-hour precipitation over the past 24 hour period (to estimate where flash flooding may have occurred). The 24-hour, 48-hour and 72-hour total precipitation contain bias corrections that are not disaggregated into the hourly estimates, so there will likely be some differences. The accumulation ending time is 7AM of the date shown in the bottom right corner. Also shown optionally are vulnerable fire burn areas (post 2012), which are updated throughout the season to include new, vulnerable burn areas. The home button in the top left corner resets the map to the original zoom.