SPM 07-12-2018: Eastern Colorado Finally Got in on the Rainfall

Issue Date: Thursday, July 12th, 2018
Issue Time: 9:30 AM MDT

Summary:

The elongated ridge shifted towards the north and east, allowing a mid-level low to retrograde westward into the state, bringing with it a bit of mid-level support that increased thunderstorm coverage yesterday. This additional support, along with a small pocket of moisture that travelled alongside it, allowed for scattered showers and thunderstorms to dot the Southeast Plains, Urban Corridor, Palmer Ridge, and Raton Ridge, in addition to the continued scattered showers/thunderstorms over the High Country.

Moisture upticked slightly throughout the day over western Colorado, allowing activity to get wetting rains to the surface more efficiently, which led to moderate rainfall underneath stronger storms. This increased efficiency caused problems over the highly-sensitive 416 Fire burn scar, where it led to mud flows and debris slides along Highway 145 between Mile Markers 76 and 77.

Overall, shower/thunderstorm coverage peaked during the afternoon and early evening hours, diminishing across most areas after sunset. A few lingering showers continued across portions of the Northwest Slope, Central Mountains, Grand Valley, Southwest Slope, and San Juan Mountains into the early morning hours. For a look at precipitation estimates in your area, please see our 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 6AM of the date shown in the bottom right corner. Also shown optionally are fire burn areas (post 2012), which are updated throughout the season to include new burn areas. The home button in the top left corner resets the map to the original zoom.