FTB 08-19-2017: Beautiful Day with Slight Uptick in Showers

Issue Date: Saturday, August 19, 2017
Issue Time: 09:20AM MDT

— There is NO flood threat today

Another beautiful day of weather is expected statewide. The upper-level ridge continues to reside just north of Colorado. Light westerly flow under the ridge will help continue to dry out the moisture in the low and mid-levels of the atmosphere.  Precipitable Water (PW) at Denver and Grand Junction this morning was only 0.58 inches. PW is expected to remain under 1 inch across the state today, which will give us another break from heavy rainfall.

Storms will begin to fire over the mountains this afternoon. The limited moisture will reduce coverage of the showers once again. Expect storms that form to favor the climatologically active regions of the Palmer Ridge and San Juan Mountains. There is a chance for a few stronger storms to initiate over the Southeast Plains this afternoon along a convergence boundary. The low atmospheric moisture paired with high-based thunderstorms will keep rainfall rates below flood threat levels. Storms will end shortly after sundown. Flooding is not expected today.

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.

Zone-Specific Forecasts:

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

Most sunny this morning become partly cloudy this afternoon. Isolated showers and weak thunderstorms will develop over the mountains this afternoon. 1-hour rain rates will be up to 0.6 inches. A few stronger storms may form over the Southeast Plains, with 1-hour rain rates up to 1 inch. There is no flood threat today.

Primetime: 1PM to 9PM

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

Sunny today becoming partly cloudy over the higher terrain this afternoon. Best chance for showers are over the San Juan Mountains. Weak thunderstorms may produce 1-hour rain rates up to 0.5 inches. Flooding is not expected today.

Primetime: 12PM to 8PM