{"id":461,"date":"2015-05-18T10:58:21","date_gmt":"2015-05-18T16:58:21","guid":{"rendered":"https:\/\/www.coloradofloodthreat.com\/?p=461"},"modified":"2015-05-18T11:04:21","modified_gmt":"2015-05-18T17:04:21","slug":"ftb-05-18-2015-another-disturbance-teams-up-with-cool-front-to-provide-overnight-heavy-rain-threat","status":"publish","type":"post","link":"https:\/\/archive-coftb.dewberryanalytics.com\/?p=461","title":{"rendered":"FTB 05-18-2015: Another Disturbance Teams Up With Cool Front To Provide Overnight Heavy Rain Threat"},"content":{"rendered":"

Issue Date: 5\/18\/2015
\nIssue Time: 10:50 AM<\/p>\n

— LOW flood threat for Southeast Mountains, Southeast Plains and parts of Palmer Ridge for overnight hours<\/span><\/em><\/p>\n

Another cut-off low<\/span> pressure disturbance will combine with strong subtropical jet dynamics to provide more cloudiness, showers and thunderstorms over parts of Colorado. These features are well depicted in the water vapor image below. For most of today, we expect on and off showers and isolated<\/span>, weak thunderstorms to be seen across most of the state. The passage of a morning cool front will limit atmospheric instability and prevent stronger storms and\/or heavier rainfall. No flooding is expected through the day and into the evening.<\/p>\n

\"watervapor_20150518\"<\/a><\/p>\n

Things turn interesting later in the evening and into the overnight hours as the disturbance approaches Colorado. Almost all guidance suggests that strong moisture transport from Texas and Mexico will likely develop storms capable of producing heavy rainfall over the Southeast Plains. The map below shows the forecasted wind speed about 6,000 feet above the ground at 3 AM. Note values exceeding 50 knots (~55 mph) over eastern Colorado. Additionally, Precipitable Water<\/span> values are forecasted to increase from 0.6 inches this morning to over 1 inch in the Southeast Plains after midnight. Thus, a Low flood threat has been issued over parts of Southeast Colorado for isolated<\/span> flash flooding<\/span> from heavy rainfall.<\/p>\n

\"700mb_windspeed\"<\/a><\/p>\n

Please see below for area-specific flood threat and forecasts (click on “About the FTB” link above to view Colorado region names).<\/p>\n