SPM 07-19-2018: High Pressure Ridging Built Overhead

Issue Date: Thursday, July 19th, 2018
Issue Time: 9:30 AM MDT

Summary:

Yesterday was marked by the return of hot temperatures and mainly dry conditions, thanks to an upper-level high pressure that settled over southern Utah. This allowed drier air to invade Colorado from the west/northwest, while the high pressure aloft acted to suppress most shower/thunderstorm development. A few scattered storms were still able to fight through the relatively unfavorable conditions over the higher terrain thanks to residual moisture hanging out under the ridge from the previous few days of rainfall. This activity was confined to the mountains of the Grand Valley, Southwest Slope, San Juan Mountains, and southern Central Mountains regions. The best moisture hung on along the CO/NM border, and one single observation of heavy rain was reported from 7 miles E of Chromo (Archuleta County), where 0.7 inches of rain fell in 30 minutes.

No flash flooding was reported yesterday. 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.