SPM 08-11-2019: Heavy Rainfall over Central and Eastern Colorado

Issue Date: Sunday, August 11, 2019
Issue Time: 10AM MDT

Summary:

Another round of heavy rainfall fell over El Paso, Pueblo and Teller Counties yesterday. A severe thunderstorm formed near and passed over Pueblo around 6PM, producing a 76 mph wind gust at Pueblo Memorial Airport. Heavy rainfall was reported to the NWS around the same time, with measurements between 0.62 and 1.0 inches over the city. The heavy rainfall caused the Arkansas River gage near Avondale to rise 2 feet into Action stage (shown below) over a 4 hour period, however waters have since then retreated back below Action stage. A little farther to the north a trained spotter reported heavy rainfall of 0.6 inches over Colorado Springs from as storm that moved off the higher terrain to the west. CoCoRaHS stations throughout Teller County reported 24-hour totals between 0.77 and 1.65 inches over the eastern and south-central portions of the county. A Flash Flood Warning was issued by the NWS over central Fremont County near Salida, with radar deriving up to 1 inch of rain over the area, however no flooding was reported. Up to 0.3 inches of rain fell over the Spring Creek burn area again yesterday, which issued an Areal Flood Advisory, but once again no flooding was reported.

Rainfall over the eastern plains favored the southeast, with a few isolated pockets of heavy rain over the Palmer Ridge and Northeast Plains as well. Storms were moving pretty fast to the east-northeast, but isolated storm totals were still impressive. Radar derived up to two inches of rainfall in an isolated storm over central Yuma County. CoCoRaHS stations issued three reports of heavy rainfall over Prowers and Bent Counties, with 24-hour totals measuring between 0.9 and 1.41 inches. Light rain fell throughout the Urban Corridor and Front Range as well, with CoCoRaHS stations measuring up to 0.32 inches in Larimer County near Fort Collins.

Over the west things were a little drier, with rainfall favoring the San Juan Mountains and Central Mountains. 24-hour totals in Archuleta County near Pagosa Springs had the highest total accumulation once again for the region, measuring 0.39 inches. Eastern and Central Saguache County had higher totals again today, measuring up to 0.42 inches. Alamosa saw rain for the third day in a row now, with CoCoRaHS measuring up to 0.1 inches. The Northwest Slope and Northern Mountains stay dry yesterday due to dry air intruding from the west.

For a look at precipitation over your area, please visit the State Precipitation Map below.

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.