SPM 09-18-2021: Short-Lived Fall-like Day

Issue Date: Saturday, September 18th, 2021
Issue Time: 9:40 AM MDT

Summary:

Friday came and went uneventfully after the early morning cold-frontal passage, which brought actual fall-like temperatures and cloud cover to the state. Along with the front came high winds for much of Eastern Colorado as well, especially the Southeast Plains. The atmosphere remained dry and stable after the front however, effectively limiting any precipitation across Colorado. No flooding was reported on Friday. For rainfall estimates in your area, check out the State Precipitation Map at the end of today’s post.

If it has felt like this summer has been a particularly warm one, that’s because it’s true. Atmospheric scientists from the Colorado Climate Center pulled together the number of days reaching 90 degrees or above this year for several climate stations across the state and compared it with the 1991-2010 average number of 90 degree days. All but two stations had more 90 degree days than average this year, Akron and Dillon (Dillon had done). On the flip side, Alamosa had over double the average number of 90 degree days so far, and Steamboat Springs has seen over triple! The tweet from Assistant State Climatologist, Dr. Becky Bolinger, shows the map and table with the information below.

The Pueblo radar is currently being upgraded and is offline for the next few weeks, so radar-based precipitation estimates for Southeast Colorado are having to rely on further radars in Denver, New Mexico, Texas, and Kansas. This will result in precipitation being underestimated for this region. More information the radar upgrade can be found here.

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 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.