SPM 09-29-2019: Wind Gusts Were the Main Story

Issue Date: Sunday, September 29th, 2019
Issue Time: 9:00 AM MDT

Summary:

Caught between a strengthening low pressure along the West Coast and a high pressure system over the Southeast US, the tightened pressure gradient over Colorado resulted in strong, southwesterly flow aloft. These strong winds were mixed down towards the surface, and resulted in wind gusts in the 35-55 mph range at some of the higher mountain passes, with lower mountain valleys reporting gusts from 15-30 mph. Additionally, the strong, southwesterly flow forced the development of scattered showers over the San Juan Mountains and isolated showers over other northwest-to-southeast oriented mountain ranges west of the Continental Divide.

East of the mountains, it was a strengthening surface low over eastern Wyoming that brought southerly winds and warmer temperatures for most, with wind gusts generally 10-20 mph. A few gusts, mainly over the far eastern plains where the pressure gradient was strongest, were recorded at 25-35 mph.

No flash flooding was reported yesterday. For a look at precipitation estimates in your area, please see 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.