{"id":3450,"date":"2016-08-16T09:37:14","date_gmt":"2016-08-16T15:37:14","guid":{"rendered":"https:\/\/www.coloradofloodthreat.com\/?p=3450"},"modified":"2016-08-17T06:38:00","modified_gmt":"2016-08-17T12:38:00","slug":"ftb-08-16-2016-bump-in-moisture-brings-slight-increase-in-rain-rates","status":"publish","type":"post","link":"https:\/\/archive-coftb.dewberryanalytics.com\/?p=3450","title":{"rendered":"FTB 08-16-2016: Bump in Moisture Brings Slight Increase in Rain Rates"},"content":{"rendered":"<p>Issue Date: 8\/16\/2016<br>\nIssue Time: 9:33 AM<\/p>\n<p><em>NO FLOOD THREAT IS FORECAST.<\/em><\/p>\n<p><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> increased steadily throughout the afternoon\/evening yesterday before leveling off overnight, as shown in the graph below. Another bump from current readings is expected today, pushing IPW values to 0.8-0.9 inches at the 3 reporting locations below (Grand Junction, Boulder, and Schriever AFB). A little better moisture will exist further east over the plains, thanks to better surface moisture values with dewpoints in the 40s\/low 50s. Aloft, the important feature will be a weak mid-level disturbance that is expected to rotate across the state this afternoon and evening.<\/p>\n<p><a href=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2016\/08\/IPW_20160816.png\"><img loading=\"lazy\" class=\"  wp-image-3451 aligncenter\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2016\/08\/IPW_20160816.png\" alt=\"IPW_20160816\" width=\"557\" height=\"245\"\/><\/a><\/p>\n<p>Overall, there is enough moisture for the weak mid-level disturbance to work with, kicking off <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\/storms. The best coverage will occur over the High Country and Western Slope, with more <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> coverage over the lower elevations of eastern Colorado. A closer inspection of moisture, however, reveals an <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Inverted-V&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Refers to the shape of the lower levels of an atmospheric profile. The shape of the &amp;quot;Inverted V&rdquo; is the result of dry air below cloud level, which promotes strong winds and evaporation of precipitation before reaching the surface.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>inverted-V<\/span> atmospheric profile, with most of the moisture existing above 2.5 km aloft. As the day wears on, some of that moisture will mix closer to the surface, helping boost rain rates a bit during the late afternoon and evening hours, but not enough to warrant any flood threat issuance. For more information on timing and rain rates, 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.m2iiic0j\/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>Urban Corridor, Northeast Plains, Palmer Ridge, Southeast Plains and Raton Ridge:<\/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> showers\/thunderstorms expected to move off of the higher terrain and over the lower elevations this afternoon and evening. The main threats from storms will be gusty winds up to 30-40 mph and lightning, with light-to-moderate rainfall. A brief period of locally moderate-to-heavy rainfall cannot be ruled out, especially with interacting <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;outflow boundaries&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;A surface boundary formed by the horizontal spreading of thunderstorm-cooled air. Outflow boundaries may intersect with each other or with other features (fronts, dry line, low-level jet) and initiate new convection. Brief strong winds are possible with outflow boundaries, and they can also persist for more than 24 hours.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>outflow boundaries<\/span>. If heavy rain occurs, minor street\/field ponding will be the main impact. Maximum rain rates are as follows:<\/p>\n<p>Northeast Plains, Southeast Plains, and Palmer Ridge: 0.8-1.4 inches\/hour<br>\nUrban Corridor and Raton Ridge: 0.6-1.0 inches\/hour<\/p>\n<p>Timing: 1 PM &ndash; Midnight<\/p>\n<h4><strong>Front Range, Southeast Mountains, Northern Mountains, Northwest Slope, San Juan Mountains, Southwest Slope, San Luis Valley, Central Mountains, and Grand Valley:<\/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 today\/tonight. The best coverage will occur across the higher terrain, with <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> showers\/storms drifting over the lower elevations. Drier air in the low levels will temper rain rates today, leaving the main impacts to be gusty winds (up to 30-40 mph) and lightning. Most activity will produce light-to-moderate rainfall, but a stronger storm or two producing brief locally heavy rainfall is possible. Burn scars, especially the Hayden Pass fire burn scar, should be monitored closely as a precaution, but no flood threat is warranted. Maximum rain rates are as follows:<\/p>\n<p>Southwest Slope, San Juan Mountains, Front Range, and Southeast Mountains : 0.6-0.8 inches\/hour<br>\nCentral Mountains, San Luis Valley, and Grand Valley: 0.5-0.8 inches\/hour<br>\nNorthern Mountains, Northwest Slope: 0.4-0.6 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 continuing into the morning hours over the higher terrain of southwestern Colorado<\/p>","protected":false},"excerpt":{"rendered":"<p>Issue Date: 8\/16\/2016 Issue Time: 9:33 AM NO FLOOD THREAT IS FORECAST. <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> increased steadily throughout the afternoon\/evening yesterday before leveling off overnight, as shown in the graph below. Another bump from current readings is expected today, pushing IPW values to 0.8-0.9 inches at the 3 reporting locations below (Grand Junction, Boulder, and Schriever [&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\/3450"}],"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=3450"}],"version-history":[{"count":1,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/3450\/revisions"}],"predecessor-version":[{"id":3452,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/3450\/revisions\/3452"}],"wp:attachment":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3450"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3450"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3450"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}