{"id":2386,"date":"2016-05-16T13:07:29","date_gmt":"2016-05-16T19:07:29","guid":{"rendered":"https:\/\/www.coloradofloodthreat.com\/?p=2386"},"modified":"2016-05-16T13:07:54","modified_gmt":"2016-05-16T19:07:54","slug":"fto-05-16-2016-two-events-one-elevated-flood-threat","status":"publish","type":"post","link":"https:\/\/archive-coftb.dewberryanalytics.com\/?p=2386","title":{"rendered":"FTO 05-16-2016: Two Events, One Elevated Flood Threat"},"content":{"rendered":"<p>Issue Date: 5\/16\/2016<br>\nIssue Time: 1:06 PM<\/p>\n<p><a href=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2016\/05\/Threat_Timeline_20160516.png\"><img loading=\"lazy\" class=\"  wp-image-2387 aligncenter\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2016\/05\/Threat_Timeline_20160516.png\" alt=\"Threat_Timeline_20160516\" width=\"884\" height=\"120\"\/><\/a><\/p>\n<p>The two events in this edition of the FTO are fairly easy to spot in the water vapor image below. The first event (denoted by the purple &ldquo;#1&rdquo;) is a continuation of the ongoing &ldquo;event&rdquo; as discussed in last Thursday&rsquo;s edition of the FTO. What is currently a slow-moving, closed upper-level low will continue to open up and begin shifting relatively quickly to the east. Event #1 is down to its final 3 days, with each successive day being drier (overall) than the previous.<\/p>\n<p><a href=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2016\/05\/WV_20160516.png\"><img loading=\"lazy\" class=\"  wp-image-2388 aligncenter\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2016\/05\/WV_20160516.png\" alt=\"WV_20160516\" width=\"576\" height=\"384\"\/><\/a><\/p>\n<p>After Event #1, ridging takes hold and plans to hang on longer than previously thought, thanks to the upper-level low associated with Event #2 becoming cut-off and stalling over the West Coast. As the upper-level low stalls and ridging builds over Colorado, temperatures will warm and a mostly sunny skies will result through Sunday (5\/22). There will still be afternoon showers\/thunderstorms over the higher terrain\/adjacent valleys typical of late-May, but a large precipitation event is not expected.<\/p>\n<p>On Monday (5\/23), disturbances rotating around the base of the <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;trough&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;An elongated area of relatively low atmospheric pressure; the opposite of a ridge.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>trough<\/span> will assert a larger (relatively speaking) influence on Colorado, but will generally leave the best chance at heavy rain to Wyoming, Nebraska, and Kansas (thanks to the placement of surface features, among other factors) through Thursday (5\/26). The Northeast Plains, and southward along the CO\/KS border, will have the best shot at strong-to-<span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;severe thunderstorms&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Thunderstorms that produce a tornado, winds of at least 58 mph (50 kts) and\/or hail at least 1&amp;quot; in diameter.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>severe thunderstorms<\/span> producing heavy rainfall during Event #2.<\/p>\n<p>Further down the road, models really diverge and become inconsistent on the next upper-level low coming down the pipe, so no event discussion will be issued. Briefly speaking, though, if the storm track from Event #2 is any indication, the following upper-level low will likely leave much of Colorado out of the heavy rain threat. Even so, the lower elevations of eastern Colorado will have the best chance at strong-to-<span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;severe thunderstorms&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Thunderstorms that produce a tornado, winds of at least 58 mph (50 kts) and\/or hail at least 1&amp;quot; in diameter.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>severe thunderstorms<\/span> producing heavy rainfall. Stay tuned to Thursday&rsquo;s edition of the FTO for an updated look at this scenario.<\/p>\n<h3><strong>Event #1: Tuesday (05-17-2016) through Thursday (05-19-2016)<\/strong><\/h3>\n<p><em><span style=\"color: #ff6600;\">Elevated Flood Threat<\/span> as Wet Period Winds Down<\/em><\/p>\n<p>The ongoing &ldquo;event&rdquo; continues, coming to a slow end through Thursday. Tuesday will be the wettest of the three days as the upper-levels continue to provide broad-scale, weak forcing for ascent. All regions will see some rainfall on Tuesday. For Wednesday and Thursday, the focus will be on the mountains, foothills, and adjacent lower elevations for <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, while the plains hold on to an <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> chance.<\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/a.tiles.mapbox.com\/v4\/sgeiger.057i00fo\/attribution,zoompan,zoomwheel,geocoder,share.html?access_token=pk.eyJ1Ijoic2dlaWdlciIsImEiOiJmNjc5a3RBIn0.LbLupVkJsS5dbo9fsgrTDg\" width=\"100%\" height=\"500px\" frameborder=\"0\"><\/iframe><\/p>\n<p><a href=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2015\/05\/Legend.png\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-230\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2015\/05\/Legend.png\" alt=\"Legend\" width=\"94\" height=\"158\"\/><\/a><\/p>\n<h3><strong>Event #2: Monday (05-23-2016) through Thursday (05-26-2016)<\/strong><\/h3>\n<p><span style=\"color: #0000ff;\"><em>No Apparent Flood Threat<\/em><\/span><\/p>\n<p>Disturbances rotating around the base of the <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;trough&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;An elongated area of relatively low atmospheric pressure; the opposite of a ridge.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>trough<\/span> will impact Colorado, bringing &ldquo;bursts&rdquo; of upper-level support overhead. Generally speaking, however, the best chance at heavy rain will be outside of the state (to the north and east). The Northeast Plains will have the best shot at strong-to-<span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;severe thunderstorms&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Thunderstorms that produce a tornado, winds of at least 58 mph (50 kts) and\/or hail at least 1&amp;quot; in diameter.&lt;\/div&gt;\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>severe thunderstorms<\/span> producing heavy rainfall during Event #2. The rain rates needed for <span class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;flash flooding&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 flooding<\/span> on the plains is much higher than other parts of the state, so no flood threat is warranted at this time.<\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/a.tiles.mapbox.com\/v4\/sgeiger.057i47be\/attribution,zoompan,zoomwheel,geocoder,share.html?access_token=pk.eyJ1Ijoic2dlaWdlciIsImEiOiJmNjc5a3RBIn0.LbLupVkJsS5dbo9fsgrTDg\" width=\"100%\" height=\"500px\" frameborder=\"0\"><\/iframe><\/p>\n<p><a href=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2015\/05\/Legend.png\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-230\" src=\"https:\/\/archive-coftb.dewberryanalytics.com\/wp-content\/uploads\/2015\/05\/Legend.png\" alt=\"Legend\" width=\"94\" height=\"158\"\/><\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Issue Date: 5\/16\/2016 Issue Time: 1:06 PM The two events in this edition of the FTO are fairly easy to spot in the water vapor image below. The first event (denoted by the purple &ldquo;#1&rdquo;) is a continuation of the ongoing &ldquo;event&rdquo; as discussed in last Thursday&rsquo;s edition of the FTO. What is currently a [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/2386"}],"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=2386"}],"version-history":[{"count":2,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/2386\/revisions"}],"predecessor-version":[{"id":2390,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/2386\/revisions\/2390"}],"wp:attachment":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2386"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2386"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2386"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}