{"id":2971,"date":"2016-07-04T09:48:14","date_gmt":"2016-07-04T15:48:14","guid":{"rendered":"https:\/\/www.coloradofloodthreat.com\/?p=2971"},"modified":"2016-07-04T09:48:14","modified_gmt":"2016-07-04T15:48:14","slug":"ftb-07-04-2016-moisture-on-the-downslope-less-showersthunderstorms","status":"publish","type":"post","link":"https:\/\/archive-coftb.dewberryanalytics.com\/?p=2971","title":{"rendered":"FTB 07-04-2016: Moisture on the Downslope, Less Showers\/Thunderstorms"},"content":{"rendered":"<p>Issue Date: 7\/4\/2016<br>\nIssue Time: 9:45 AM<\/p>\n<p><em>A LOW FLOOD THREAT IS ISSUED FOR PORTIONS OF THE NORTHERN MOUNTAINS, CENTRAL MOUNTAINS, GRAND VALLEY, AND SAN JUAN MOUNTAINS.<\/em><\/p>\n<p>Weak, upper-level ridging aloft will be in place over Colorado today, with moisture continuing its downward trend from previous days. The moisture decrease is evident in the IPW graph below, with all four reporting stations falling below 0.9 inches as of this morning. As the day progresses, IPW values will remain fairly steady, rebounding just a bit during the afternoon hours. All in all, moisture will remain sufficient to fuel another day of <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, but not enough to warrant anything more than low flood threat concerns.<\/p>\n<p><a href=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2016\/07\/IPW_20160704.png\"><img loading=\"lazy\" class=\"  wp-image-2972 aligncenter\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2016\/07\/IPW_20160704.png\" alt=\"IPW_20160704\" width=\"579\" height=\"256\"\/><\/a><\/p>\n<p>The majority of today&rsquo;s activity will occur over the High Country, in accordance with daytime heating and the passage of a weak disturbance aloft. Light westerly flow will transport a few of those showers\/thunderstorms over eastern Colorado. Additionally, surface convergence along the preferred terrain of the Cheyenne Ridge, Palmer Ridge, and Raton Ridge will likely lead to the development of a few <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> thunderstorms over those areas. This morning&rsquo;s sounding from Denver suggests the storms will be fairly high-based, leading to more of a wind\/lightning threat than heavy rain. Most, if not all, precipitation across the state will end by midnight, with clouds decreasing overnight. For more details, please see the zone-specific 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.<\/p>\n<div style=\"position: relative;\"><iframe loading=\"lazy\" src=\"https:\/\/a.tiles.mapbox.com\/v4\/sgeiger.0iopp01j\/attribution,zoompan,zoomwheel,geocoder,share.html?access_token=pk.eyJ1Ijoic2dlaWdlciIsImEiOiJmNjc5a3RBIn0.LbLupVkJsS5dbo9fsgrTDg\" width=\"100%\" height=\"500px\" frameborder=\"0\"><\/iframe><\/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<h3><\/h3>\n<h3><strong>Zone-Specific Forecasts<\/strong><\/h3>\n<h4><strong>Northwest Slope, Front Range, Southeast Mountains, Southwest Slope, and San Luis Valley:<\/strong><\/h4>\n<p><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, mainly over the higher terrain. A few showers\/storms will move over adjacent valleys and lower elevations, but most will not survive long. Most activity will be fairly high-based, resulting in gusty winds, lightning, and brief light-to-moderate rainfall. A couple stronger storms will feature brief heavy rain. Maximum rain rates are as follows:<\/p>\n<p>Northwest Slope: 0.4-0.7 inches\/hour<br>\nFront Range, Southwest Slope, and Southeast Mountains: 0.4-0.8 inches\/hour<br>\nSan Luis Valley: 0.5-0.9 inches\/hour<\/p>\n<p>Timing: Noon &ndash; Midnight<\/p>\n<h4><strong>Northeast Plains, Urban Corridor, Palmer Ridge, Raton Ridge, and Southeast Plains:<\/strong><\/h4>\n<p><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 expected, with the bulk of activity occurring near the higher terrain and over the preferred terrain of the Palmer Ridge, Raton Ridge, and Cheyenne Ridge. Most storms will be fairly high-based, so the main threats will be strong\/gusty winds and lightning. Rain rates will remain below <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;flash flood&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 flood<\/span> threat thresholds, with maximum rates as follows:<\/p>\n<p>Northeast Plains, Palmer Ridge, and Southeast Plains: 0.2-0.4 inches\/hour<br>\nUrban Corridor: 0.4-0.6 inches\/hour<br>\nRaton Ridge: 0.5-0.8 inches\/hour<\/p>\n<p>Timing: 1 PM &ndash; 10 PM, with a couple showers\/weak thunderstorms continuing over the Southeast Plains and Raton Ridge until 2 AM.<\/p>\n<h4><strong>Northern Mountains, Grand Valley, Central Mountains, and San Juan Mountains:<\/strong><\/h4>\n<p><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, with the majority of activity occurring over the higher terrain. A few will drift over adjacent valleys\/lower elevations. Main threats from storms will be gusty winds and lightning, with brief downpours. The issuance of the low flood threat is due to a combination of potential rain rates as well as antecedent soil conditions from previous days&rsquo; rainfall. Maximum rain rates are as follows:<\/p>\n<p>Northern Mountains, Central Mountains, and San Juan Mountains: 0.8-1.4 inches\/hour<br>\nGrand Valley: 0.6-1.0 inches\/hour<\/p>\n<p>Timing: 11 AM &ndash; 10 PM, with a couple <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\/thunderstorms continuing into the early AM over the higher terrain of the Central and Northern Mountains<\/p>","protected":false},"excerpt":{"rendered":"<p>Issue Date: 7\/4\/2016 Issue Time: 9:45 AM A LOW FLOOD THREAT IS ISSUED FOR PORTIONS OF THE NORTHERN MOUNTAINS, CENTRAL MOUNTAINS, GRAND VALLEY, AND SAN JUAN MOUNTAINS. Weak, upper-level ridging aloft will be in place over Colorado today, with moisture continuing its downward trend from previous days. The moisture decrease is evident in the IPW [&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\/2971"}],"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=2971"}],"version-history":[{"count":1,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/2971\/revisions"}],"predecessor-version":[{"id":2973,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/2971\/revisions\/2973"}],"wp:attachment":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2971"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2971"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2971"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}