{"id":4517,"date":"2017-05-16T09:21:08","date_gmt":"2017-05-16T15:21:08","guid":{"rendered":"https:\/\/www.coloradofloodthreat.com\/?p=4517"},"modified":"2017-05-17T05:46:16","modified_gmt":"2017-05-17T11:46:16","slug":"ftb-05-16-2017-unsettled-weather-statewide","status":"publish","type":"post","link":"https:\/\/archive-coftb.dewberryanalytics.com\/?p=4517","title":{"rendered":"FTB 05-16-2017: Unsettled Weather Statewide"},"content":{"rendered":"<p>Issue Date: 5\/16\/2017<br>\nIssue Time: 9:25 AM<\/p>\n<p><em>A LOW FLOOD THREAT IS FORECAST TODAY FOR PORTIONS OF THE NORTHEAST PLAINS AND SOUTHEAST PLAINS. The Purgatoire River continues to run at bank-full levels, to minor flood stage, in Bent County.<\/em><\/p>\n<p>An upper-level <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;trough&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;An elongated area of relatively low atmospheric pressure; the opposite of a ridge.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>trough<\/span> will rotate across the region today, resulting in an unsettled day\/night. The potential for heavy rainfall will be stunted by limited moisture across the high country and western slope; this morning&rsquo;s <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> values were in the 25th percentile for the date. Those values will climb somewhat with the approach\/passage of the upper-<span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;trough&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;An elongated area of relatively low atmospheric pressure; the opposite of a ridge.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>trough<\/span>, but not to an extent to warrant a flood threat. For the adjacent lower elevations of the Urban Corridor, Palmer Ridge, Raton Ridge, and western portions of the plains regions, a bit better moisture will be present. Storms that form in these areas will have access to enough moisture to produce brief periods of moderate-to-heavy rainfall, but not enough to warrant a flood threat.<\/p>\n<p><a href=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2017\/05\/WV_20170516.jpg\"><img loading=\"lazy\" class=\" wp-image-4518 aligncenter\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2017\/05\/WV_20170516.jpg\" alt=\"\" width=\"608\" height=\"342\"\/><\/a><\/p>\n<p>The deepest moisture (and best instability) will reside across the far eastern plains, which is where a low flood threat has been issued for today\/tonight. Additionally, near\/within the low flood threat, storms will be on the strong-to-severe side, with damaging winds and large hail as the main threats. An <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> tornado or two cannot be ruled out, especially across far northeastern Colorado where a surface boundary will reside. For more information regarding rain rates and timing, please see the zone-specific forecast discussions below.<\/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, jump below the map.<br><a href=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2017\/05\/LFT_20170516.png\"><img loading=\"lazy\" class=\"size-full wp-image-4524 aligncenter\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2017\/05\/LFT_20170516.png\" alt=\"\" width=\"884\" height=\"497\"\/><\/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<h3><\/h3>\n<h3><strong>Zone-Specific Forecasts<\/strong><\/h3>\n<h4><strong>Urban Corridor, Palmer Ridge, Northeast Plains, Southeast Plains, and Raton Ridge:<\/strong><\/h4>\n<p>Sunny skies this morning will give way to mostly cloudy skies and <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> showers\/thunderstorms this afternoon\/tonight. Areas nearest the mountains will see storms produce more in the way of gusty <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;outflow&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;A cool pool of air that results when a thunderstorm downdraft reaches the surface and spreads horizontally.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>outflow<\/span> winds than rainfall due to drier air in the low- and mid-levels. Further to the east, deeper moisture is present, with dewpoints in the 40s and low 50s. These areas will hold the threat for heavy rainfall, and thus the introduction of the low flood threat. Maximum rain rates are as follows:<\/p>\n<p>Urban Corridor and Palmer Ridge: 0.4-0.8 inches\/hour<br>\nNortheast Plains and Southeast Plains (Kiowa\/Cheyenne Counties): 1.0-1.75 inches\/hour<br>\nSoutheast Plains (remainder): 0.4-0.8 inches\/hour<br>\nRaton Ridge: 0.1-0.3 inches\/hour<\/p>\n<p>Timing: 1 PM &ndash; 1 AM, with lingering showers into the morning hours<\/p>\n<h4><strong>Front Range and Southeast Mountains:<\/strong><\/h4>\n<p>Increasing clouds are expected through the day as the upper-level <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;trough&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;An elongated area of relatively low atmospheric pressure; the opposite of a ridge.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>trough<\/span> rotates through. <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;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> showers\/thunderstorms are expected to develop this afternoon across these regions, with the best coverage\/duration over the Front Range. Maximum rain rates are as follows:<\/p>\n<p>Front Range: 0.2-0.5 inches\/hour<br>\nSoutheast Mountains: 0.2-0.4 inches\/hour<\/p>\n<p>Timing: 1 PM &ndash; 11 PM, with a few lingering showers into the early morning hours, mainly over the Front Range<\/p>\n<h4><strong>Northwest Slope, Northern Mountains, Central Mountains, San Juan Mountains, San Luis Valley, Southwest Slope, and Grand Valley:<\/strong><\/h4>\n<p>High clouds have already begun streaming into the area, with more on the way. <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> showers\/thunderstorms are expected this afternoon and evening, with the most coverage expected over the higher terrain. Snow will fall on the mountain peaks, resulting in 1-3 inches of accumulation. Moisture is limited, so heavy rainfall is not a threat today. Maximum rain rates will be 0.2-0.4 inches\/hour.<\/p>\n<p>Timing: 11 AM &ndash; 9 PM, with a couple lingering showers until midnight.<\/p>","protected":false},"excerpt":{"rendered":"<p>Issue Date: 5\/16\/2017 Issue Time: 9:25 AM A LOW FLOOD THREAT IS FORECAST TODAY FOR PORTIONS OF THE NORTHEAST PLAINS AND SOUTHEAST PLAINS. The Purgatoire River continues to run at bank-full levels, to minor flood stage, in Bent County. An upper-level <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;trough&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;An elongated area of relatively low atmospheric pressure; the opposite of a ridge.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>trough<\/span> will rotate across the region today, resulting in an unsettled day\/night. The potential [&hellip;]<\/p>","protected":false},"author":1,"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\/4517"}],"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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4517"}],"version-history":[{"count":2,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/4517\/revisions"}],"predecessor-version":[{"id":4525,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/4517\/revisions\/4525"}],"wp:attachment":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}