— A HIGH<\/strong> flood threat has been issued for the Southeast Mountains, Raton Ridge, Urban Corridor, Palmer Ridge, & Southeast Plains<\/em>
— A MODERATE<\/strong> flood threat has been issued for the Grand Valley, Central Mountains, & Front Range<\/em>
— A LOW<\/strong> flood threat has been issued for the San Juan Mountains, San Luis Valley, Southwest Slope, Northwest Slope, Northern Mountains, & Northeast Plains<\/em>
— Fire-Burn Forecast Summary:<\/strong> 4 burn areas under HIGH threat, 4 burn areas under MODERATE threat, 1 burn area under LOW threat; click <\/em>HERE<\/a> for more info <\/em><\/p>\n
Rain showers are ongoing across portions of central and eastern Colorado with nearly 2 inches of rain in one hour already recorded near Broomfield this morning, and flooding is already occurring according to local storm reports. Midlevel energy continues to build across the state, marked by the “X” in the water vapor image below, and similarly to yesterday, monsoonal moisture continues to wrap around the high pressure (currently centered over the Texas panhandle). PW<\/span> values of 1.20 and 1.34 inches were measured in Grand Junction and Platteville, respectively, indicating ample column moisture. At the surface, dew points<\/span> in the low to mid-50s°F (west) and greater than 60°F (east) further shows the depth of moisture present even in the lowest levels of the boundary layer<\/span>.<\/p>\n This afternoon, upslope flow in association with a deepening surface low pressure is expected to transport additional moisture in from the south and east, creating a pooling effect east of the Continental Divide<\/span> where moisture can build up against the mountains and adjacent foothills. Instability is forecast to reach values of 1200-1800 J\/kg of CAPE<\/span> for portions of the Eastern Plains, with values ranging from 800-1100 J\/kg of CAPE<\/span> more common over the mountains and west of the Continental Divide<\/span>. Initially, convective storms producing high rain rates are expected before instability wanes and storms transition to more widespread<\/span> coverage. Thereafter, storms are expected to produce longer-duration moderate to heavy rainfall across most of southern and central Colorado over a 3-to-6-hour period. Given that west to southwesterly upper-level steering flow is forecast to be weak today, within the range of 5 to 10 mph (west) and 15 to 20mph (east), storms are expected to be relatively slow-moving. Of additional concern are soils that are already saturated from prior days of heavy rainfall; as such, all the aforementioned factors increase confidence in a higher-end flood threat for central and southern Colorado today.<\/p>\n A HIGH flood threat has been issued for portions of southeast Colorado, a MODERATE flood threat for portions of southern and central Colorado, and a LOW flood threat for portions of western and northern Colorado. Urban and small stream flooding are of particular concerns today, similarly to yesterday, with added concerns for excessive runoff, mud flows, and debris slides over steeper terrains that may receive several hours of moderate to heavy rainfall.<\/p>\n
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