SPM 09-01-2018: Scattered High-Based Showers and Thunderstorms

Issue Date: Saturday, September 1st, 2018
Issue Time: 9:30 AM MDT

Summary:

The stubborn upper-level high that resulted in dry, hot conditions throughout the week finally shifted east yesterday, allowing the return of mid-level moisture to Colorado from the west/southwest. This mid-level moisture was enough to fuel scattered showers and thunderstorms across the state during the afternoon and evening hours, with a few spotty showers continuing into this morning. The impact of this activity was more wind than rain, as the near-surface air remained relatively dry, evaporating much of the rainfall before it reached the ground. Most locations that experienced rainfall received less than 0.1 inches, with a few locally higher totals east of I-25 where better low-level moisture resided and multiple rounds of showers/thunderstorms moved overhead. As far as storm reports are concerned, the only strong thunderstorm wind gust that was reported came from Yampa Valley Airport (Routt County), where a 54 mph wind gust was reported yesterday afternoon.

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 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.