FTB 05-30-2017: More Scattered Storms Expected, A Few With Heavy Rainfall Potential

Issue Date: Tuesday, May 30th, 2017
Issue Time: 10:50AM MDT

LOW flood threat for parts of Southeast Mountains, Raton Ridge and Southeast Plains

Another crystal clear start to the day today will allow for strong insolation as we are getting closer to summer’s peak heating. At the upper-levels, as the water vapor image shows below, a large trough continues to be centered across central/eastern North America. As the trough slowly continues to move eastward through the day, Colorado will be increasingly affected by subsidence from the high-pressure ridge to the west. However, its impacts will be felt more so west of the Continental Divide. To the east, elevated heating will cause a weak upslope circulation to develop especially in southeast Colorado. With just enough low-level moisture, scattered showers and thunderstorms will dot the landscape by the afternoon. While the storms won’t be overly impressive, they will be steered by very light winds, less than 25mph. Thus, they will be capable of producing isolated heavy rainfall, much like on Monday. A Low flood threat is posted today for the foothills of southeast Colorado for isolated flash flooding, debris slides and debris flows.

Today’s Flood Threat Map

For more information on today’s flood threat, see the map below (hover over threat areas for more details). For Zone-Specific forecasts, scroll below the map.

Flood Threat Legend

Zone-Specific Forecasts:

Raton Ridge, Southeast Mountains, Southeast Plains, Northeast Plains, Front Range, Urban Corridor, Palmer Ridge:

Mostly clear this morning then partly cloudy with isolated to scattered showers and thunderstorms possible. Highest coverage will be in the foothills and western plains of southeast Colorado. Max 1-hour rainfall up to 0.6 inches except up to 1.1 inch in southern areas. A Low flood threat has been posted for parts of the region. Small hail up to 0.5 inches could accompany the stronger cells.

Primetime: 2PM to 8PM

San Juan Mountains, Southwest Slope, Grand Valley, San Luis Valley, Northwest Slope, Northern Mountains, Central Mountains:

Sunny this morning then becoming partly cloudy with isolated showers and a weak thunderstorm possible mainly in the higher elevations of the San Juans and southern portions of the Central Mountains. Max 1-hour rainfall up to 0.3 inches. Small hail (up to 0.25 inches) could accompany the stronger cells. Flooding is not expected today.

Primetime: 12PM to 7PM