{"id":10733,"date":"2019-09-07T10:21:41","date_gmt":"2019-09-07T16:21:41","guid":{"rendered":"https:\/\/www.coloradofloodthreat.com\/?p=10733"},"modified":"2019-09-08T07:36:07","modified_gmt":"2019-09-08T13:36:07","slug":"spm-09-07-2019-heavy-rainfall-over-the-denver-metro-at-rush-hour","status":"publish","type":"post","link":"https:\/\/archive-coftb.dewberryanalytics.com\/?p=10733","title":{"rendered":"SPM 09-07-2019: Heavy Rainfall over the Denver Metro at Rush Hour"},"content":{"rendered":"

Issue Date: Saturday, September 7th, 2019
\nIssue Time: 10:25AM MDT<\/p>\n

Summary:<\/h3>\n

It seemed like a cool, quiet weather day until storms really began to get going over the eastern mountains just after 2PM. A passing cloud front return a ton of low level moisture to the area, and slow steering winds helped allow for some very heavy accumulations. A strong thunderstorm formed over the southern foothills near Evergreen\/Floyd Hill just after 1:30PM. Hail up to 1 inch in diameter was reported along with mud flows, debris slides and road flooding. Hail accumulated (inches in depth) on the roadways, which only exuberated the problem with the Cold Spring Gulch ALERT recording 1.14 inches. Storms also formed over the southern metro area and were nearly stationary. An incredible amount of rainfall ensued. An ALERT gauge in Centennial (Englewood Dam) had 2.72 inches of rain in an hour, which was truly a worst case scenario. That is the second highest gauge reading I’ve seen since I started watching those gages 3 years ago. To see 24-houir precipitation totals from the ALERT gages, click here: ALERT<\/a><\/span><\/span>. Not surprisingly, there was a large area under a Flash Flood<\/span> Warning<\/span> during the afternoon commute with a car rescue at C-470 and Yosemite. Please don’t drive through high water. There was also a brief tornado reported near Centennial Airport and a tornado warning<\/span> issued for Aurora briefly after for minor rotation in a storm. There was no tornado reported with this warning<\/span>. Further south near the springs an ALERT gage recorded 1.93 inches near Perry Park. A USGS gage at Douglas Creek above Flying West Ranch Road had 1.61 inches with the USAF had 1.30 inches.<\/p>\n

Flash Flood<\/span> Warnings and Advisory was also issued for the Spring Creek and High Pass burn areas, respectively. Flooding was reported at Pass Creek Road (Spring Creek burn area), which is 3 miles north of Highway 160. There was CoCoRaHS<\/span> station near Forbes Park that reported 0.8 inches for the 24-hour period. The Chalk Cliffs over Chaffee County also had a Flood Advisory issued for them at 2PM. MetStorm estimates up to 0.75 inches fell in the area with observations in the arear around 0.25 inches. As storms moved east, lack of instability and a capped<\/span> environment kept the heavy rainfall threat away. Storms also picked up in intensity and coverage over the western high terrains. As much as 0.50 inches fell over the San Juan Mountains with two 0.4 inches observations near the Flat Tops.<\/p>\n

To see estimated precipitation totals over your area on Friday, scroll down to the State Precipitation Map below.<\/p>\n

Click Here For Map Overview<\/h4>
\nThe map below shows radar-estimated, rainfall gage-adjusted Quantitative Precipitation Estimates (QPE<\/span>) 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<\/span> may have occurred). 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.\n

Note: The 24-hour, 48-hour and 72-hour total precipitation do not contain bias corrections today due to errors in the CoCoRaHS<\/span> data. This means there may be underestimations in QPE<\/span> over the southwest and southeast corners of the state. <\/span><\/p>\n<\/div>\n\"\"<\/a>","protected":false},"excerpt":{"rendered":"

Issue Date: Saturday, September 7th, 2019 Issue Time: 10:25AM MDT Summary: It seemed like a cool, quiet weather day until storms really began to get going over the eastern mountains just after 2PM. A passing cloud front return a ton of low level moisture to the area, and slow steering winds helped allow for some […]<\/p>","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/10733"}],"collection":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10733"}],"version-history":[{"count":3,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/10733\/revisions"}],"predecessor-version":[{"id":10737,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/10733\/revisions\/10737"}],"wp:attachment":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10733"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10733"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10733"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}