Issue Date: 9/19/2015
Issue Time: 9:41 AM
NO FLOOD THREAT IS FORECAST.
The upper-level trough that passed overhead yesterday has flattened the upper-level ridge, resulting in west-northwest flow aloft for today. As shown in the IPW graph below, moisture within the flow is well below the 1 inch threshold. During the afternoon/evening hours, a weak disturbance will work across Colorado, producing mainly mid-level clouds and virga due to the moisture being confined around 500 mb. The best chances for shower activity will be across the higher terrain of the Southwest Slope, San Juan Mountains, and Southeast Mountains.
A few showers will try and work over the lower elevations of eastern Colorado, but will not result in more than light sprinkles. Otherwise, expect a mostly sunny day early, becoming partly sunny during the afternoon/evening with isolated-to-scattered showers, with seasonably cool overnight temperatures.
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, jump below the map.
Zone-Specific Forecasts
Urban Corridor, Northeast Plains, Raton Ridge, Palmer Ridge, and Southeast Plains:
Mostly sunny early, becoming partly sunny during the afternoon/evening. A few isolated showers will try and work across the regions, mainly south of I-70. Significant precipitation is not expected, and virga will be the main result.
Timing: 3 PM – 11 PM
Front Range, Northern Mountains, Northwest Slope, Central Mountains, Grand Valley, San Juan Mountains, Southwest Slope, Southeast Mountains, and San Luis Valley:
Mostly sunny early, becoming partly sunny during the afternoon/evening. Isolated-to-scattered showers are expected with the weak disturbance moving overhead. Virga and mid-level clouds will be the main result, but any showers will produce less than 0.15 inches/hour. The best chance for showers will be south of I-70 along the Continental Divide.
Timing: 1 PM – 11 PM
