SPM 06-01-2022: Heavy Precipitation Across Northeast Colorado

Issue Date: Wednesday, June 1st, 2022
Issue Time: 10:00 AM MDT

Summary:

Several meteorological factors came together across the state on Tuesday to produce heavy precipitation across the Front Range, Urban Corridor, Palmer Ridge, and Northeast Plains. Moisture advection on upslope flow, mid-level frontogenetical forcing, and an impressively strong upper-level jet stream led to a blossoming of precipitation by yesterday afternoon across the aforementioned forecast zones. Rain, with snow at higher elevations, continued the rest of the day and into today.

The precipitation fell at moderate to occasionally heavy rates, with the most intense precipitation occurring from Denver northeast along I-76. Precipitation totals along this corridor ranged from 1.00-1.50”, with a few locations recording totals approaching 2.00”; a CoCoRaHS observer near Evergreen reported 1.71”. The rest of northeastern Colorado generally saw anywhere from 0.25-0.75”, with the lowest totals along and south of the Palmer Ridge.

Denver officially recorded 1.22” of rain, making it the largest single-day accumulation since May of 2021:

High elevations of the Front Range once again saw late-season snowfall, with over 16” reported by a CoCoRaHS observer near Idaho Springs! Nine different creeks along the Urban Corridor are running at all-time highs for this day-of-year, per the USGS; none, however, are in flood stage.

There was no flooding reported yesterday. For precipitation estimates in your area over the last few days, check out the 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 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.