SPM 09-19-2017: Sunshine with Increasing Winds

Issue Date: Tuesday, September 19, 2017
Issue Time: 10:30AM MDT


Almost clear skies across the state yesterday. Below is a visible satellite image taken at 5PM yesterday, which shows just a few clouds over the state. Below it are the surface observations from the same time, which confirms very low dew point values. As expected, the wind speeds also started to increase with the approaching upper level trough and jet stream. The largest non-thunderstorm gust reported yesterday was 56 mph in San Juan County.

With dew point values in the 20s and 30s, very little rain made it to the surface. Any clouds that were able to form, quickly evaporated with the entrainment of drier air. Only one CoCoRaHS station recorded measurable precipitation, but it was under 0.05 inches. Radar estimates over the Northern and Central Mountains (where the clouds are in the visible image) were under 0.25 inches.

There was no flooding reported Monday as of this morning. For an estimate of rainfall totals in your area, scroll down to 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 accumulation ending time is 6AM of the date shown in the bottom right corner. Also shown optionally are fire burn areas since 2012. The home button in the top left corner resets the map to the original zoom.

Note: We have identified a possible underestimation in QPE over the southwest part of the state. We are working to on this issue, and will provide an update as soon as possible.