{"id":3646,"date":"2016-08-31T10:49:34","date_gmt":"2016-08-31T16:49:34","guid":{"rendered":"https:\/\/www.coloradofloodthreat.com\/?p=3646"},"modified":"2016-09-01T08:55:40","modified_gmt":"2016-09-01T14:55:40","slug":"ftb-08-31-2016-heavy-rainfall-threat-still-present-shifts-south","status":"publish","type":"post","link":"https:\/\/archive-coftb.dewberryanalytics.com\/?p=3646","title":{"rendered":"FTB 08-31-2016: Heavy Rainfall Threat Still Present, Shifts South"},"content":{"rendered":"<p>Issue Date: Wednesday, August 31st, 2016<br>\nIssue Time: 10:45AM MDT<\/p>\n<p><em>&mdash; <strong>MODERATE<\/strong> flood threat for Palmer Ridge, Southeast Mountains<\/em><br><em> &mdash; <strong>LOW<\/strong> flood threat for Front Range, Southeast Plains, Raton Ridge<\/em><\/p>\n<p>The morning weather map, see water vapor image below, shows many similar features as yesterday. Despite the presence of a large-scale ridge over the Rocky Mountain states, a disturbance remains across Colorado, seemingly lost from the main steering winds. This disturbance has been slowly weakening, as measured by 500 mb temperatures rising by several degrees every day including today. However, as we saw yesterday, it is still causing generally favorable conditions for <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;scattered&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;25-40% areal coverage&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>scattered<\/span> to <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;widespread&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;greater than 60% areal coverage&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>widespread<\/span> thunderstorm activity mainly east of the <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Continental Divide&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;textColor&amp;quot;:&amp;quot;white&amp;quot;} --&amp;gt;\n&amp;lt;p class=&amp;quot;has-white-color has-text-color&amp;quot;&amp;gt;the dividing line that separates the watersheds of the western and eastern United States; rivers west of the divide empty into the Pacific Ocean, while rivers east of the divide empty into the Atlantic Ocean or Gulf of Mexico&amp;lt;\/p&amp;gt;\n&amp;lt;!-- \/wp:paragraph --&amp;gt;&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>Continental Divide<\/span>. We expect much more of the same today, though with an overall southward shift in the region of stronger storms. Early storms will form across the higher terrain as well as parts of the Northeast and Southeast Plains. These will be garden variety cells, likely incapable of flood-worthy rainfall. However, later in the afternoon, more organized storms are expected across mainly southeast CO. <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;isolated&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;less than 10% areal coverage&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>Isolated<\/span> <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;flash flooding&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;textColor&amp;quot;:&amp;quot;white&amp;quot;} --&amp;gt;\n&amp;lt;p class=&amp;quot;has-white-color has-text-color&amp;quot;&amp;gt;flash flooding can refer to usually dry areas becoming rapidly inundated with water, or rapid water level rises on streams, creeks, or rivers beyond flood stage; typically caused by heavy rainfall, but can also be caused by meltwater&amp;lt;\/p&amp;gt;\n&amp;lt;!-- \/wp:paragraph --&amp;gt;&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>flash flooding<\/span> will be possible with these cells, warranted a Low flood threat. A small area of the western Palmer Ridge and Wet Mountains is under a Moderate flood threat due to favorable upslope winds during the late afternoon and early evening hours. Hail up to 1.25 inches will be possible with the earlier storms especially farther north as dry air aloft slowly works its way into the area.<\/p>\n<p><a href=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2016\/08\/wv_markup10.png\"><img loading=\"lazy\" class=\"aligncenter  wp-image-3657\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2016\/08\/wv_markup10.png\" alt=\"wv_markup\" width=\"616\" height=\"419\"\/><\/a><\/p>\n<h3><strong>Today&rsquo;s Flood Threat Map<\/strong><\/h3>\n<p>For more information on today&rsquo;s flood threat, see the map below (hover over threat areas for more details). For Zone-Specific forecasts, scroll below the map.<br><a href=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2016\/08\/FTB_20160831.png\"><img loading=\"lazy\" class=\"aligncenter  wp-image-3663\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2016\/08\/FTB_20160831.png\" alt=\"FTB_20160831\" width=\"892\" height=\"501\"\/><\/a><\/p>\n<div><img loading=\"lazy\" class=\"alignright wp-image-135\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2015\/04\/floodthreat_legend2.png\" alt=\"Flood Threat Legend\" width=\"275\" height=\"71\"\/><\/div>\n<div>\n<h3><strong>Zone-Specific Forecasts:<\/strong><\/h3>\n<p><strong>Front Range, Urban Corridor, Palmer Ridge, Northeast Plains, Raton Ridge, Southeast Plains, Southeast Mountains:<\/strong><\/p>\n<p>Sunny early then <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;scattered&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;25-40% areal coverage&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>scattered<\/span> thunderstorms developing by early afternoon. Coverage will be highest in the foothills as well as the Northeast and Southeast Plains. Max 30-minute rainfall up to 1.2 inches is possible, with max 1-hr rates up to 2.2 inches especially later in the day in the southern parts of the area. A Low flood threat has been posted for southern parts of the area for <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;isolated&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;less than 10% areal coverage&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>isolated<\/span> <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;flash flooding&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;textColor&amp;quot;:&amp;quot;white&amp;quot;} --&amp;gt;\n&amp;lt;p class=&amp;quot;has-white-color has-text-color&amp;quot;&amp;gt;flash flooding can refer to usually dry areas becoming rapidly inundated with water, or rapid water level rises on streams, creeks, or rivers beyond flood stage; typically caused by heavy rainfall, but can also be caused by meltwater&amp;lt;\/p&amp;gt;\n&amp;lt;!-- \/wp:paragraph --&amp;gt;&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>flash flooding<\/span>. A localized Moderate threat is posted for higher terrain where late afternoon\/early evening storms could pose a threat of mud flows and debris slides. Hail up to 1.25 inches is possible under the strongest cells especially earlier in the afternoon.<\/p>\n<p>Primetime: 2PM to midnight, especially for southern areas<\/p>\n<p><strong>San Juan Mountains, Southwest Slope:<\/strong><\/p>\n<p>Mostly sunny this morning then <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;scattered&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;25-40% areal coverage&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>scattered<\/span> to showers and thunderstorms developing by early afternoon. Coverage will be highest in the San Juans. Max 1-hr rain rates up to 0.6 inches possible. Hail up to 0.5 inches could accompany the strongest cells. Graupel is possible above 12,500 feet. Flooding is not expected today.<\/p>\n<p>Primetime: 1PM to 7:30PM<\/p>\n<p><strong>San Luis Valley, Northwest Slope, Northern Mountains, Central Mountains, Grand Valley:<\/strong><\/p>\n<p>Mostly sunny early then <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;isolated&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;less than 10% areal coverage&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>isolated<\/span> showers and a weak storm possible through the early evening hours. Max 1-hour rain rates up to 0.3 inches. Flooding is not expected today.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Issue Date: Wednesday, August 31st, 2016 Issue Time: 10:45AM MDT &mdash; MODERATE flood threat for Palmer Ridge, Southeast Mountains &mdash; LOW flood threat for Front Range, Southeast Plains, Raton Ridge The morning weather map, see water vapor image below, shows many similar features as yesterday. Despite the presence of a large-scale ridge over the Rocky [&hellip;]<\/p>","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[6],"tags":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/3646"}],"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\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3646"}],"version-history":[{"count":3,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/3646\/revisions"}],"predecessor-version":[{"id":3666,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/3646\/revisions\/3666"}],"wp:attachment":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3646"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3646"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3646"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}