Issue Date: Sunday, June 6, 2021
Issue Time: 9:20AM MDT
Summary:
Thunderstorms began to develop in the late morning at high elevations as moisture was funneled in Western Colorado around a high-pressure system situated southwest of the state. Widespread thunderstorm activity increased in the afternoon bringing light, but much needed, precipitation to the west, including 0.11” in East Grand Junction, and similar 0.10-0.15 inch totals in the Southwest Slope and San Juan Mountains according to CoCoRaHS observers. For additional rainfall estimates in your area, check out the State Precipitation Map at the bottom of this post.
Several flood advisories or warnings were issued across the state over major burn areas, including flood advisories for the East Troublesome and Williams Fork burn areas, and flash flood warnings for the Cameron Peak and Spring Creek burn areas. These warnings were issued after Doppler radar indicated heavy rain due to thunderstorms. However, no additional flood reports were made at these locations (or elsewhere in Colorado). For the burn areas, a lack of reports could simply be due to their remote locations, which limit human observations of flooding.
As the day progressed to the evening, some storms began to spill over from the Front Range and into the Urban Corridor. A severe thunderstorm warning was issued for Castle Rock and the surrounding areas after radar indicated quarter-sized hail. Again, precipitation totals with these storms were light, but they did put on quite a lightning show, as seen in many social media posts, including the following taken in Centennial.
Click Here For Map Overview
