{"id":13661,"date":"2021-05-09T09:10:36","date_gmt":"2021-05-09T15:10:36","guid":{"rendered":"https:\/\/www.coloradofloodthreat.com\/?p=13661"},"modified":"2021-05-09T09:10:36","modified_gmt":"2021-05-09T15:10:36","slug":"ftb-05-09-2021-cooler-rain-turning-to-snow-for-many-and-no-flood-threat","status":"publish","type":"post","link":"https:\/\/archive-coftb.dewberryanalytics.com\/?p=13661","title":{"rendered":"FTB 05-09-2021: Cooler, Rain Turning To Snow For Many, And No Flood Threat"},"content":{"rendered":"<p>Issue Date: Sunday, May 9th, 2021<br>\nIssue Time: 9:00AM MDT<\/p>\n<p><em>&mdash; Flooding is <strong>NOT<\/strong> expected today<\/em><\/p>\n<p>Happy Mother&rsquo;s Day!<\/p>\n<p>This morning&rsquo;s visible satellite imagery, below, shows a developing surface cyclone over the Four Corners with a thick mid\/low level cloud deck along with some showers and a weak storm or two in southern Colorado. While the dynamics with this system will certainly be impressive, the main missing piece preventing heavy rain potential is the moisture content. This morning&rsquo;s <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> at Grand Junction was only 0.18 inches, with 0.40 inches measured at Denver. However, even western KS and NE had <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> below 0.5 inches, a noticeable drop since yesterday. Overall, this system has trended a bit drier since we first began watching it five days ago. In turn, this implies less instability and more stratiform, versus convective rainfall (and yes, snowfall). Maximum atmospheric instability today will be below 500 J\/kg in southern and southeastern Colorado. This is far too low for anything besides a local, short-pulsed heavy downpour so flooding is NOT expected today. However, <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> severe weather, mainly in the form of strong winds and perhaps large hail, will be possible in southeast Colorado.<\/p>\n<p><a href=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2021\/05\/vis_markup-1.png\"><img loading=\"lazy\" class=\"aligncenter wp-image-13662\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2021\/05\/vis_markup-1.png\" alt=\"\" width=\"723\" height=\"506\" srcset=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2021\/05\/vis_markup-1.png 784w, https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2021\/05\/vis_markup-1-300x210.png 300w, https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2021\/05\/vis_markup-1-768x538.png 768w\" sizes=\"(max-width: 723px) 100vw, 723px\"\/><\/a><\/p>\n<p>West of the <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Continental Divide&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;the dividing line that separates the watersheds of the western and eastern United States; rivers west of the divide empty into the Pacific Ocean, while rivers east of the divide empty into the Atlantic Ocean or Gulf of Mexico&amp;lt;\/p&amp;gt;\n&amp;lt;!-- \/wp:paragraph --&amp;gt;&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>Continental Divide<\/span>, gusty winds and low relative humidity will continue to support conditions favorable for wildfires. Fortunately, the cooler temperatures will mitigate the threat somewhat, compared to Saturday. Stay tuned to National Weather Service forecasts for updates on this.<\/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\/2021\/05\/No_Flood_Threat_2021.png\"><img loading=\"lazy\" class=\"aligncenter  wp-image-13663\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2021\/05\/No_Flood_Threat_2021.png\" alt=\"\" width=\"817\" height=\"613\" srcset=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2021\/05\/No_Flood_Threat_2021.png 768w, https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2021\/05\/No_Flood_Threat_2021-300x225.png 300w\" sizes=\"(max-width: 817px) 100vw, 817px\"\/><\/a><\/p>\n<h3><strong>Zone-Specific Forecasts:<\/strong><\/h3>\n<h4><strong>Raton Ridge and Southeast Plains:<\/strong><\/h4>\n<p>Mostly cloudy and much cooler with <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> to <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;widespread&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;greater than 60% areal coverage&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>widespread<\/span> showers and a few thunderstorms through the day and into the evening. Maximum 1-hour rainfall up to 0.5 inches possible for most areas below 6,000 feet, but up to 0.9 inches in far southeast CO along the OK and KS borders. A severe storm, with large hail and gusty winds to 55mph cannot be ruled out in these areas. The snow level will drop from 8,000 feet this morning down to 6,000 feet later this evening and into the overnight hours.<\/p>\n<p>The Spring Creek burn scar is not expected to have flooding concerns because precipitation will be transitioning to snow later today, if it hasn&rsquo;t done so already.<\/p>\n<p>Flooding is NOT expected today.<\/p>\n<p>Primetime: Now through 6AM, with highest rainfall intensity between 1PM and 7PM<\/p>\n<h4><strong>Northern Mountains, Front Range, Urban Corridor, Central Mountains, Palmer Ridge, Northeast Plains:<\/strong><\/h4>\n<p>Increasing clouds and much cooler with <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> rain and snow showers developing later this afternoon and increasing in coverage overnight. A rumble of thunder cannot be ruled out. Max 1-hour rainfall up to 0.4 inches earlier in the afternoon. The snow level will drop from 7,500 feet this afternoon to 5,000 feet overnight.<\/p>\n<p>Fire burn scars are not anticipated to experience flooding issues because of the combination of light rainfall intensity and transition of precipitation into snowfall.<\/p>\n<p>Flooding is NOT expected today.<\/p>\n<p>Primetime: 1PM through the overnight hours<\/p>\n<h4><strong>Grand Valley, San Juan Mountains, Southwest Slope &amp; San Luis Valley, Northwest Slope:<\/strong><\/h4>\n<p>Mostly sunny to partly cloudy and cooler this afternoon. Rain and snow showers will increase in coverage this afternoon mainly for elevations above 7,500 feet. Below this level, it will be too dry for any significant precipitation. Max 1-hour rainfall up to 0.2 inches. A <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Red Flag&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 are extremely conducive to burning and wildfires&amp;lt;\/p&amp;gt;\n&amp;lt;!-- \/wp:paragraph --&amp;gt;&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>Red Flag<\/span> <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Warning&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;a weather warning is issued when a specific weather event is imminent or occurring&amp;lt;\/p&amp;gt;\n&amp;lt;!-- \/wp:paragraph --&amp;gt;&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>warning<\/span> is currently in effect for the San Luis Valley, so please stay tuned to 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 updates on fire conditions.<\/p>\n<p>Flooding is NOT expected today.<\/p>","protected":false},"excerpt":{"rendered":"<p>Issue Date: Sunday, May 9th, 2021 Issue Time: 9:00AM MDT &mdash; Flooding is NOT expected today Happy Mother&rsquo;s Day! This morning&rsquo;s visible satellite imagery, below, shows a developing surface cyclone over the Four Corners with a thick mid\/low level cloud deck along with some showers and a weak storm or two in southern Colorado. While [&hellip;]<\/p>","protected":false},"author":4,"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\/13661"}],"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\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=13661"}],"version-history":[{"count":1,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/13661\/revisions"}],"predecessor-version":[{"id":13664,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/13661\/revisions\/13664"}],"wp:attachment":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13661"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13661"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13661"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}