{"id":8288,"date":"2018-09-02T07:55:56","date_gmt":"2018-09-02T13:55:56","guid":{"rendered":"https:\/\/www.coloradofloodthreat.com\/?p=8288"},"modified":"2018-09-03T07:35:47","modified_gmt":"2018-09-03T13:35:47","slug":"ftb-09-02-2018-low-flood-threat-tied-to-increase-in-moisture-slower-storm-motions","status":"publish","type":"post","link":"https:\/\/archive-coftb.dewberryanalytics.com\/?p=8288","title":{"rendered":"FTB 09-02-2018: Low Flood Threat Tied to Increase in Moisture, Slower Storm Motions"},"content":{"rendered":"

Issue Date: 9\/2\/2018
\nIssue Time: 8:00 AM<\/p>\n

A LOW FLOOD THREAT IS FORECAST TODAY FOR PORTIONS OF THE SOUTHWEST SLOPE, SAN JUAN MOUNTAINS, SOUTHEAST MOUNTAINS, RATON RIDGE, AND SOUTHEAST PLAINS.<\/em><\/p>\n

The upper-level trough<\/span> that impacted Colorado yesterday hasn’t moved much over the previous 12-18 hours, continuing to drift slowly eastward over the 4-Corners region. This will set the stage for another afternoon\/evening of isolated<\/span>-to-scattered<\/span> showers and thunderstorms across the state. A difference between yesterday and today will be the influx of some low-level moisture across eastern Colorado, where easterly flow will bring plains moisture towards the Front Range and Southeast Mountains. Wind shear<\/span>, moisture, and pockets of instability will be sufficient to produce a couple stronger storms capable of moderate-to-heavy rainfall, thus the issuance of the low flood threat for the sensitive burn scars of southeast Colorado.<\/p>\n

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

Over the High Country, areas north of I-70 will remain mostly dry tomorrow, with only a couple isolated<\/span> showers dotting the higher terrain. South of I-25, the influence of a mid-level stream of moisture from the south will provide the fuel for scattered<\/span> showers and thunderstorms. Most of the activity will be garden-variety, with impacts being light-to-moderate rainfall, gusty winds, and lightning. Storms will move slower than yesterday, leaving the possibility for longer residence time of moderate rainfall over a sensitive burn scar; thus, the issuance of the low flood threat for portions of the Southwest Slope and San Juan Mountains regions. For more details on rain rates and timing, please see the zone-specific forecast discussions below.<\/p>\n

Today’s Flood Threat Map<\/strong><\/h3>\n

For more information on today’s flood threat, see the map below (hover over threat areas for more details). For Zone-Specific forecasts, jump below the map.<\/p>\n

\"\"<\/a><\/div>\n
\"Flood<\/div>\n

Zone-Specific Forecasts<\/strong><\/h3>\n

Front Range, Urban Corridor, Palmer Ridge, Northeast Plains, Southeast Plains, Southeast Mountains, and Raton Ridge:<\/strong><\/h4>\n

Scattered<\/span> showers and thunderstorms are expected, with the bulk of the activity occurring south of I-70. Storms will move slower than yesterday thanks to weaker mid-level flow, and this in partnership with an increase in moisture has led to the issuance of the low flood threat. Maximum rain rates are as follows:<\/p>\n

Front Range: 0.2-0.4 inches\/hour
\nUrban Corridor, Palmer Ridge, and Northeast Plains: 0.4-0.7 inches\/hour
\nSoutheast Plains and Raton Ridge: 1.0-1.3 inches\/hour
\nSoutheast Mountains: 0.5-0.7 inches\/hour<\/p>\n

Timing: A few showers are ongoing this morning across the Southeast Plains. Aside from those, timing will be 11 AM – 11 PM, with a couple lingering showers\/weak thunderstorms into the early morning hours.<\/p>\n

Northern Mountains, Northwest Slope, Central Mountains, Grand Valley, San Juan Mountains, Southwest Slope, and San Luis Valley:<\/strong><\/h4>\n

Isolated<\/span> showers are expected north of I-70, with scattered<\/span> showers and a few thunderstorms south of I-70. The best coverage will be across the higher terrain of the San Juan Mountains, Southwest Slope, and southern Central Mountains where moisture will be best. Slow-moving storms capable of moderate rainfall are behind the issuance of the low flood threat. Maximum rain rates are as follows:<\/p>\n

Northwest Slope and Northern Mountains: 0.1-0.2 inches\/hour
\nGrand Valley: 0.2-0.3 inches\/hour
\nCentral Mountains, Southwest Slope, San Juan Mountains, and San Luis Valley: 0.3-0.5 inches\/hour.<\/p>\n

Timing: 11 AM – 8 PM for the Northwest Slope and Northern Mountains, 11 AM – 9 PM for the Grand Valley, and 11 AM – 1 AM for the San Juan Mountains, Southwest Slope, and San Luis Valley<\/p>","protected":false},"excerpt":{"rendered":"

Issue Date: 9\/2\/2018 Issue Time: 8:00 AM A LOW FLOOD THREAT IS FORECAST TODAY FOR PORTIONS OF THE SOUTHWEST SLOPE, SAN JUAN MOUNTAINS, SOUTHEAST MOUNTAINS, RATON RIDGE, AND SOUTHEAST PLAINS. The upper-level trough<\/span> that impacted Colorado yesterday hasn’t moved much over the previous 12-18 hours, continuing to drift slowly eastward over the 4-Corners region. This […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","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\/8288"}],"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=8288"}],"version-history":[{"count":2,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/8288\/revisions"}],"predecessor-version":[{"id":8295,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=\/wp\/v2\/posts\/8288\/revisions\/8295"}],"wp:attachment":[{"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8288"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8288"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/archive-coftb.dewberryanalytics.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}