Time: 712 AM Wed August 12, 2020 Forecaster: Justin Brooks

Heavy Precipitation Outlook
Flash Flood Prediction Program

HOT AND GENERALLY DRY WITH A VERY SLIGHT CHANCE FOR AN AFTERNOON HIGH-BASED ISOLATED RAIN SHOWER/THUNDERSTORM
-Not much has changed to the overall weather pattern today as Westerly upper-level flow will continue to dominate over the region today leading to high temperatures in the low to upper 90's across the plains with low to upper 80's along the foothills
-A few scattered high-based rain showers/thunderstorms this afternoon, although any precipitation will struggle to reach the ground today resulting in a good chance for gusty winds under cells that do produce rain that evaporates before making it to the ground. Best chance to see any storm development will be from 2-8pm with skies clearing out after sunset.
-Overnight lows will drop into the low to mid 60's across the plains with mid to upper 50's along the foothills
STORM RAINFALL POTENTIAL AND DURATION: High-based Rain showers and/or a weak thunderstorms will produce a trace to 0.1". An isolated moderate thunderstorms will have the potential to produce 0.1-0.3" in 10-30 mintues. Supplemental QPF is available at https://qpf.udfcd.org

A LOOK AHEAD: This pattern will continue over the next couple of days, with westerly upper-level flow ushering in drier air Thursday and Friday. A shift in the pattern is expected Saturday bringing a better chance for afternoon rain showers/isolated thunderstorms. This pattern will hold Sunday and Monday with a chance for rain showers/isolated thunderstorms in the afternoon and early evening.

Location Prime Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams 200 PM TO 800 PM
Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE
Arapahoe 200 PM TO 800 PM
Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE
Boulder 200 PM TO 800 PM
Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE
Broomfield 200 PM TO 800 PM
Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE
Denver 200 PM TO 800 PM
Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE
Douglas 200 PM TO 800 PM
Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE
Jefferson 200 PM TO 800 PM
Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE
Foothills above 6500ft      
Boulder 200 PM TO 800 PM
Trace (15%) to 0.1" (10%) to 0.3" (0%) NONE
Douglas 200 PM TO 800 PM
Trace (15%) to 0.1" (10%) to 0.3" (0%) NONE
Jefferson 200 PM TO 800 PM
Trace (15%) to 0.1" (10%) to 0.3" (0%) NONE
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.