SPM 07-13-2019: Thunderstorms over the Northeast Plains and High Country

Issue date: Saturday, July 13, 2019
Issue time: 10:40AM MDT


Widespread rainfall returned to the state yesterday as midlevel moisture returned to the area. A cold front dropped in from the north midday causing enhanced convergence along the Palmer Ridge. A line of moderate to severe thunderstorms formed over the Northeast Plains along the boundary and traveled slowly to the northeast. CoCoRaHS stations near Keensburg in southern Weld County reported 0.65 and 0.51 inches. An Areal Flood Advisory was issued over the area but there were no reports of flooding. Radar derived rainfall of up to 1 inch along I-76 from Brighton to the Nebraska border. Hail of 1 inch diameter was reported to the NWS near Julesburg in Sedgwick County. Dry air below the cloud bases produced gusty winds over the south Urban Corridor, with a report to NWS of 60 mph wind gusts near Colorado Springs Airport. Precipitation over the high country remained light, with most CoCoRaHS stations reporting less than 0.15 inches. A flash flood warning was issued over the Hayden Pass burn area at 4pm with radar deriving 0.5 inches of rain over an hour, but there were no reports of flash flooding.

For a closer look at precipitation over your area, please view 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 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.