{"id":1233,"date":"2015-07-12T09:46:21","date_gmt":"2015-07-12T15:46:21","guid":{"rendered":"https:\/\/www.coloradofloodthreat.com\/?p=1233"},"modified":"2015-07-13T07:03:04","modified_gmt":"2015-07-13T13:03:04","slug":"ftb-07-12-2015-moisture-creeps-back-into-southwest-colorado","status":"publish","type":"post","link":"https:\/\/archive-coftb.dewberryanalytics.com\/?p=1233","title":{"rendered":"FTB 07-12-2015: Moisture Creeps Back Into Southwest Colorado"},"content":{"rendered":"<p>Issue Date: 7\/12\/2015<br>\nIssue Time: 9:45AM<\/p>\n<p><em>&mdash; <strong>Low<\/strong> flood threat for San Juan Mountains and Southwest Slope<\/em><\/p>\n<p>This morning, Colorado residents awoke to mostly clear skies and cool temperatures in the 40s and 50s. Overhead, our atmosphere is being increasingly dominated by a high pressure ridge to our southeast (see water vapor image below). However, return flow (or clockwise) around the high pressure is allowing for moisture to stream in from the subtropics. A distinct monsoonal moisture surge is noted this morning, from the Mexican Sierra Madre mountain range all the way north along the Arizona\/New Mexico border. While morning <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;precipitable water&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;The total atmospheric water vapor contained in a vertical column of the atmosphere. It is typically measured in inches, and anomalously (deviation from normal) high values of precipitable water generally correlate to heavy rainfall potential.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>precipitable water<\/span> (<span class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;PW&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;(Stands for: Precipitable Water) The total atmospheric water vapor contained in a vertical column of the atmosphere. It is typically measured in inches, and anomalously (deviation from normal) high values of precipitable water generally correlate to heavy rainfall potential.&lt;\/div&gt;\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>PW<\/span>) values across the state were in the 0.6 to 0.8 inch range, this surge will be carrying 1inch or greater PWs into southwest Colorado. East of the <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;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\"}]'>Divide<\/span>, <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;downsloping&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Refers to the winds that blow from higher elevations down towards lower elevations. As air parcels descend, they warm, which often results in rapid warming of areas near the higher terrains. It also promotes lower relative humidity values and stability, which prevents thunderstorm development.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>downsloping<\/span> flow and subsidence from the high pressure will put a limit on rainfall rates.<\/p>\n<p><a href=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2015\/07\/watervapor_20150712.png\"><img loading=\"lazy\" class=\"aligncenter  wp-image-1238\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2015\/07\/watervapor_20150712.png\" alt=\"watervapor_20150712\" width=\"857\" height=\"482\"\/><\/a><\/p>\n<p>For today, we expect mostly sunny skies this morning to lead to <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 over southwest Colorado and into the higher terrain of the Central Mountains. Most rainfall activity will be benign, with 1-hr rainfall rates up to 0.6 inches possible. However, over the southeast corner of the state, high moisture content will allow for 1-hr rainfall up to 1.0 inch. A Low flood threat has been posted for that region. In addition to the rainfall today, stronger storms will be capable of producing gusty winds up to 55 mph. Storm activity will diminish after sunset statewide.<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>Today&rsquo;s Flood Threat Map<\/strong><\/span><br>\nFor more information on today&rsquo;s flood threat, see the map below (hover over threat areas for more details). For Zone-Specific forecasts, jump below the map.<\/p>\n<div style=\"position: relative;\"><a href=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2015\/07\/20150712_LFT.png\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-1241\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2015\/07\/20150712_LFT.png\" alt=\"20150712_LFT\" width=\"889\" height=\"499\"\/><\/a><\/div>\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<p><span style=\"text-decoration: underline;\"><strong>Zone Specific Forecasts<\/strong><\/span><\/p>\n<p><strong>Southwest Slope, San Juans:<\/strong><\/p>\n<p>Mostly sunny early with <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. Maximum one-hour rain rates up to 1.0 inch will be possible, leading to <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> mud flows and debris slides. Gusty winds, up to 55 mph, will also be possible. Storm activity will gradually diminish in the late evening. A Low flood threat has been posted for the area.<\/p>\n<p><strong>Grand Valley, Northwest Slope, Northern Mountains, Central Mountains, San Luis Valley:<\/strong><\/p>\n<p>Mostly sunny early, then turning partly cloudy. <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> to <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;widely scattered&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;10-25% areal coverage&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>widely scattered<\/span> thunderstorms will be possible from early afternoon to around sunset. Max 1-hr rain rates up to 0.5 inches will be possible, along with gusty winds up to 55 mph. No flooding is expected today.<\/p>\n<p><strong>Northeast Plains, Southeast Plains, Palmer Ridge, Front Range, Urban Corridor, Raton Ridge, Southeast Mountains:<\/strong><\/p>\n<p>Mostly sunny and warmer with a few cumulus clouds possible by late afternoon. Rainfall is not expected today, but if a storm does form, it will be more of a gusty wind threat than rainfall. Flooding is not expected today.<\/p>","protected":false},"excerpt":{"rendered":"<p>Issue Date: 7\/12\/2015 Issue Time: 9:45AM &mdash; Low flood threat for San Juan Mountains and Southwest Slope This morning, Colorado residents awoke to mostly clear skies and cool temperatures in the 40s and 50s. Overhead, our atmosphere is being increasingly dominated by a high pressure ridge to our southeast (see water vapor image below). However, [&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\/1233"}],"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=1233"}],"version-history":[{"count":3,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/1233\/revisions"}],"predecessor-version":[{"id":1243,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/1233\/revisions\/1243"}],"wp:attachment":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1233"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1233"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1233"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}