SPM 08-13-2018: Afternoon Showers and Thunderstorms returned to the Central and San Juan Mountains

Issue Date: Monday, August 13th, 2018
Issue Time: 09:30 AM MDT

Summary:

Residual moisture under the ridge helped kick off some thunderstorms over the Central and San Juan Mountains on Sunday. Highest moisture was further south, thus storms to the north produced gusty winds and rainfall totals under 0.1 inches. A few storms even drifted into the San Luis Valley. CoCoRaHS stations in Alamosa recorded up to 0.21 inches with totals up to 0.25 inches in the area. Further west, a CoCoRaHS gage near Purgatory Ski Resort recorded 0.35 inches with a nearby SNOTEL (Cascade) recording 0.6 inches. Sharkstooth SNOTEL (near Burro Mountain) recorded 0.5 inches, and a CoCoRaHS near Dolores recorded 0.79 inches. A Flash Flood Warning was issued for northeast Montezuma County for this thunderstorm since it tracked over the recent burn scars, but no flooding was reported as of this morning. Small hail was also reported in this area with a storm report of 0.75 inch diameter hail coming from Dolores.

To see how much precipitation fell over your area the last 72-hours, scroll down to the State Precipitation Map below.

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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.