{"id":13190,"date":"2020-09-17T09:36:30","date_gmt":"2020-09-17T15:36:30","guid":{"rendered":"https:\/\/www.coloradofloodthreat.com\/?p=13190"},"modified":"2020-09-17T09:36:30","modified_gmt":"2020-09-17T15:36:30","slug":"ftb-09-17-2020-more-smoke-and-some-light-mountain-showers","status":"publish","type":"post","link":"https:\/\/archive-coftb.dewberryanalytics.com\/?p=13190","title":{"rendered":"FTB 09-17-2020: More Smoke and Some Light Mountain Showers"},"content":{"rendered":"<p>Issue Date: Thursday, September 17th, 2020<br>\nIssue Time: 09:35AM MDT<\/p>\n<p><em>&mdash; Flooding is <strong>NOT<\/strong> expected today<\/em><\/p>\n<p>Just like a broken record, today will mainly be a repeat of the previous days this week as it will mainly stay dry across the state. Colorado remains on the east side a high pressure ridge with weak west\/northwest steering flow (see image below). The only chance for seeing some light measurable rainfall will be due to diurnal mountain slope flows initiating clouds and maybe a couple light showers over the higher terrains. The southern mountains once again have the highest chances of seeing a few high-elevation raindrops. However, it looks like some increased cloud-cover is expected for the Front Range, but no rainfall is expected. Moisture remains limited across the state as the Grand Junction and Denver soundings only contain 0.34 and 0.42 inches of <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>, respectively. Most of this moisture seems to be in the lower half of the atmosphere (<span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;boundary layer&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;&amp;lt;\/p&amp;gt;\n&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;br \/&amp;gt;&amp;lt;p&amp;gt;&amp;lt;span style=&amp;quot;color: #ffffff;&amp;quot;&amp;gt;The lower portion of the atmosphere that is directly influenced by the earth&amp;#039;s surface. Primarily, the boundary layer is driven by solar heating during the day and radiational cooling at night.&amp;lt;\/span&amp;gt;&amp;lt;\/p&amp;gt;&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>boundary layer<\/span>) according to soundings, but surface <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;dew points&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;The temperature to which a given air parcel must be cooled (at constant pressure and water vapor content) in order for saturation to occur.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>dew points<\/span> are only in the 20Fs and 30Fs across the mountain regions and in the 40Fs across the plains. Dry air and a strong <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;inversion&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;when temperature increases with height in the atmosphere; the presence of an inversion means the atmosphere is stable&amp;lt;\/p&amp;gt;\n&amp;lt;!-- \/wp:paragraph --&amp;gt;&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>inversion<\/span> at the top of the <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;boundary layer&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;&amp;lt;\/p&amp;gt;\n&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;br \/&amp;gt;&amp;lt;p&amp;gt;&amp;lt;span style=&amp;quot;color: #ffffff;&amp;quot;&amp;gt;The lower portion of the atmosphere that is directly influenced by the earth&amp;#039;s surface. Primarily, the boundary layer is driven by solar heating during the day and radiational cooling at night.&amp;lt;\/span&amp;gt;&amp;lt;\/p&amp;gt;&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>boundary layer<\/span> will make it difficult for storms to fire across the state. The water vapor satellite image below shows some drier air, and likely stronger <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;inversion&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;when temperature increases with height in the atmosphere; the presence of an inversion means the atmosphere is stable&amp;lt;\/p&amp;gt;\n&amp;lt;!-- \/wp:paragraph --&amp;gt;&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>inversion<\/span>, is situated over eastern Colorado this morning (see image below). Temperatures will be warmer today for the plains regions, pushing slightly above average into the mid 80Fs for most locations. No flooding is expected today.<\/p>\n<p>Unfortunately, smoke and <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;haze&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;atmospheric phenomenon that occurs when fine particles suspended in the air greatly reduce visibility and air quality&amp;lt;\/p&amp;gt;\n&amp;lt;!-- \/wp:paragraph --&amp;gt;&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>haze<\/span> will remain in the air across Colorado today. The highest concentrations of smoke will be over the eastern plains regions, where an Air Quality Alert remains in place today. Check out your local <span class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;NWS&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;National Weather Service&lt;\/div&gt;\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>NWS<\/span> office for more information. There will likely continue to be some local smoke being produced from the Middle Fork, Williams Fork, and Cameron Peak wildfires in the state as the dry and warm weather will favor more active fire activity. However, winds are not expected to be strong today, so fire activity should be limited.<\/p>\n<p><a href=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2020\/09\/FTB_20200917_graphic.png\"><img loading=\"lazy\" class=\"aligncenter wp-image-13191\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2020\/09\/FTB_20200917_graphic.png\" alt=\"\" width=\"700\" height=\"582\" srcset=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2020\/09\/FTB_20200917_graphic.png 902w, https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2020\/09\/FTB_20200917_graphic-300x249.png 300w, https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2020\/09\/FTB_20200917_graphic-768x639.png 768w\" sizes=\"(max-width: 700px) 100vw, 700px\"\/><\/a><\/p>\n<h3><strong>Today&rsquo;s Flood Threat Map<br><\/strong><\/h3>\n<p>For more information on today&rsquo;s flood threat, see the map below. Hover over the threat areas for more details, and click on burn areas to learn more about them. For Zone-Specific forecasts, scroll below the threat map.<\/p>\n<p><a href=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2020\/04\/FTB_No_Flood_Threat_2020.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-11243\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2020\/04\/FTB_No_Flood_Threat_2020.png\" alt=\"\" width=\"717\" height=\"537\"\/><\/a><\/p>\n<h3><strong>Zone-Specific Forecasts:<br><\/strong><\/h3>\n<h4><strong>Northeast Plains, Urban Corridor, Palmer Ridge, Raton Ridge, &amp; Southeast Plains:<br><\/strong><\/h4>\n<p>Warmer temperatures (80Fs) and continued smoke will impact the area today. An elongated surface low pressure region will extend from southwest to northeast over the northern half of the plains regions, which will set up a convergence boundary over the Palmer Ridge and Northeast Plains regions today. This could be the focus for a few clouds to form, but a strong <span class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;cap&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;The area where a parcel of air has negative buoyancy or sinks. The intensity of the cap is measured by its convective inhibition. If the cap is sufficiently large, it may prevent thunderstorms from forming at all.&lt;\/div&gt;\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>cap<\/span> will likely keep storms from developing. Additionally, daytime heating will mix out some of the higher 40Fs <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;dew points&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;The temperature to which a given air parcel must be cooled (at constant pressure and water vapor content) in order for saturation to occur.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>dew points<\/span>, so moisture will be limited. No flooding is expected today.<\/p>\n<h4><strong>Grand Valley, Northwest Slope, Northern Mountains, Front Range, Central Mountains, Southwest Slope, San Juan Mountains, Southeast Mountains, &amp; San Luis Valley:<br><\/strong><\/h4>\n<p>Daytime heating will allow up-mountain flow today and some clouds and a few showers to form near mountaintops and ridgelines. The southern San Juan Mountains have the highest (although still low) chances of seeing measurable rainfall from a light shower, but total accumulations should stay below 0.1 inches and confined to the higher elevation locations due to plenty of sub-cloud evaporation. The Front Range should see an increase in fair weather clouds, but rainfall is not expected. Any showers that form today could create some wind gusts up to 30 mph due to plenty of sub-cloud evaporation, but these winds are not likely over the active wildfires in the state. No flooding is expected.<\/p>","protected":false},"excerpt":{"rendered":"<p>Issue Date: Thursday, September 17th, 2020 Issue Time: 09:35AM MDT &mdash; Flooding is NOT expected today Just like a broken record, today will mainly be a repeat of the previous days this week as it will mainly stay dry across the state. Colorado remains on the east side a high pressure ridge with weak west\/northwest [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","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\/13190"}],"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=13190"}],"version-history":[{"count":1,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/13190\/revisions"}],"predecessor-version":[{"id":13192,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/13190\/revisions\/13192"}],"wp:attachment":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13190"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13190"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13190"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}