SPM 06-21-2021: Continued Rainy East – Dry West

Issue Date: Monday, June 21, 2021
Issue Time: 9:30 AM MDT

Summary:

Sunday saw widespread evening showers in the Eastern Plains and Palmer Ridge, which continued well into the night. There was plenty of moisture but limited instability, so rainfall rates remained low with these storms. A strong enough cell formed between Colorado Springs and Pueblo to warrant severe thunderstorm warnings, with large hail and damaging winds as the main threat, however no additional severe reports were made. No flooding was reported on Sunday. For rainfall estimates in your area, check out the State Precipitation Map below.

Out west, non-thunderstorm high winds were reported in the Western Slope, Grand Valley, and Northern Mountains, where fire danger was already elevated. Gusts exceeded 50 mph in Meeker, Steamboat Springs, and Glenwood Springs, and 49 mph in Cortez in the southwest. The ongoing lack of rain west of the divide continues to impact streamflow as well. According to the USGS National Water Dashboard for Colorado, a majority of gauges in the state are now “below” or “much below” normal for this time of year, with nearly all of the low gauges concentrated to the west.

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.