{"id":13359,"date":"2020-09-30T09:51:57","date_gmt":"2020-09-30T15:51:57","guid":{"rendered":"https:\/\/www.coloradofloodthreat.com\/?p=13359"},"modified":"2020-09-30T09:51:57","modified_gmt":"2020-09-30T15:51:57","slug":"ftb-09-30-2020-dry-with-ample-sunshine-to-end-the-ftb-season","status":"publish","type":"post","link":"https:\/\/archive-coftb.dewberryanalytics.com\/?p=13359","title":{"rendered":"FTB 09-30-2020: Dry with Ample Sunshine to End the FTB Season"},"content":{"rendered":"<p>Issue Date: Wednesday, September 30th, 2020<br>\nIssue Time: 9:50AM MDT<\/p>\n<p><span style=\"color: #ff0000;\">This is the last scheduled Flood Threat Bulletin for the 2020 season. Once again, it has been a pleasure to serve you! The next Flood Threat Bulletin season begins on May 1, 2021. <\/span><\/p>\n<p><em>&mdash; Flooding is <strong>NOT<\/strong> expected today<\/em><\/p>\n<p>A very dry air mass has worked its way over the western US and Colorado under an impressive dual High pressure ridge (yellow\/orange shades below). Under this set up, northwesterly flow aloft will continue with the core of the jet to our northeast. The jet may nose into the far Northeast Plains, so surface winds in the 15 to 20 mph range will be possible over the border counties.<\/p>\n<p>A shallow cold front is currently moving through eastern Colorado, so more seasonable temperatures are expected over the lower, eastern elevations today. Surface winds in the 15 to 20 mph range are possible as the front passes through before it stalls out over the Palmer Ridge area. There is very little moisture return with this front, as shown by <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> increasing from ~25F to 35F. However, that will increase relative humidity values enough that <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;critical fire weather&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;weather conditions especially conducive to the formation of wildfires; typically strong winds, low relative humidity, and atmospheric instability&amp;lt;\/p&amp;gt;\n&amp;lt;!-- \/wp:paragraph --&amp;gt;&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>critical fire weather<\/span> conditions are not forecast. The lack of moisture return also means another day with precipitation chances close to zero. The northerly surface flow behind the front has transported smoke south over the Front Range and I-25 Corridor, so lower air quality is expected. With clear skies and ample sunshine, there is no flood threat issued.<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-13360 aligncenter\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2020\/09\/wv_20200930.png\" alt=\"\" width=\"624\" height=\"444\" srcset=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2020\/09\/wv_20200930.png 624w, https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2020\/09\/wv_20200930-300x213.png 300w\" sizes=\"(max-width: 624px) 100vw, 624px\"\/><\/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. If there is a threat, 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:<\/strong><\/h3>\n<h4><strong>Front Range, Southeast Mountains, Raton Ridge, Palmer Ridge, Urban Corridor, Southeast Plains, &amp; Northeast Plains:<\/strong><\/h4>\n<p>Breezy conditions are expected over the plains this morning and today as another cold front passes through. The front is rather shallow, so high temperatures will only be affected over the lower elevations to about the Palmer Ridge. Highs will be in the mid 70Fs to lower 80Fs, and temperatures over the eastern mountains will reach the mid 60Fs (north) and lower 70Fs (south). It will be too dry for any rainfall or clouds to develop with the upslope flow, so no flooding is forecast. Although skies will be clear, smoke from the fires will travel southwards and lower air quality. Ash is being reported across the I-25 corridor this morning.<\/p>\n<h4><strong>San Juan Mountains, Central Mountains, Northern Mountains, Grand Valley, San Luis Valley, Northwest Slope, &amp; Southwest Slope: <\/strong><\/h4>\n<p>Above average temperatures are forecast along with clear skies. High temperatures are forecast to reach 4F to 8F above normal. So, highs will reach into the 80Fs over the lower elevations with 70Fs for most of the mountain valleys. No rainfall is forecast with <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> measured at 0.25 inches in the Grand Junction sounding this morning, which is a new daily record low value.<\/p>","protected":false},"excerpt":{"rendered":"<p>Issue Date: Wednesday, September 30th, 2020 Issue Time: 9:50AM MDT This is the last scheduled Flood Threat Bulletin for the 2020 season. Once again, it has been a pleasure to serve you! The next Flood Threat Bulletin season begins on May 1, 2021. &mdash; Flooding is NOT expected today A very dry air mass has [&hellip;]<\/p>","protected":false},"author":8,"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\/13359"}],"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\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=13359"}],"version-history":[{"count":1,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/13359\/revisions"}],"predecessor-version":[{"id":13361,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/13359\/revisions\/13361"}],"wp:attachment":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13359"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13359"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}