Time: 855 PM Sun June 13, 2021 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1'S WILL BE ALLOWED TO EXPIRE AT 9:30 PM - Message 1's issued for the entire District will expire at 9:30pm as the threat for heavy rainfall has come to an end. - Strong to severe thunderstorms impacted portions of the District this afternoon and early evening bringing heavy rain, lots of lightning and large hail. Storms have moved onto the eastern plains at this time, although a few lingering rain showers and isolated thunderstorms persist at the eastern fringes of the District. Rain showers and isolated thunderstorm activity will continue to diminish as the evening progresses. - Skies will start to clear through the overnight with temperatures dropping into the upper 50's to low 60's for the plains with low to mid 50's along the foothills into Monday morning. STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers and isolated thunderstorms will produce a trace to 0.1" in 10-30 minutes. A stronger thunderstorm will be capable of producing 0.1-0.3" in 10-30 minutes. WORST CASE SCENARIO: A slow moving, or stationary rain shower will have the potential to produce 0.3-0.5" in 30-60 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Arvada 1 Current TO 930 PM Current TO 930 PM Wheat Ridge 1 Current TO 930 PM Current TO 930 PM Lakewood 1 Current TO 930 PM Current TO 930 PM the City of Aurora 1 Current TO 930 PM Current TO 930 PM Arapahoe County 1 Current TO 930 PM Current TO 930 PM DIA 1 Current TO 930 PM Current TO 930 PM Denver County 1 Current TO 930 PM Current TO 930 PM Adams County 1 Current TO 930 PM Current TO 930 PM Douglas County 1 Current TO 930 PM Current TO 930 PM Broomfield County 1 Current TO 930 PM Current TO 930 PM Jefferson County 1 Current TO 930 PM Current TO 930 PM Boulder County 1 Current TO 930 PM Current TO 930 PM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 1159 PM SUN Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Arapahoe Current TO 1159 PM SUN Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Boulder Current TO 1159 PM SUN Trace (10%) to 0.1" (5%) to 0.3" (0%) NONE Broomfield Current TO 1159 PM SUN Trace (10%) to 0.1" (5%) to 0.3" (0%) NONE Denver Current TO 1159 PM SUN Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Douglas Current TO 1159 PM SUN Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Jefferson Current TO 1159 PM SUN Trace (10%) to 0.1" (5%) to 0.3" (0%) NONE Foothills above 6500ft       Boulder Current TO 1159 PM SUN Trace (10%) to 0.1" (5%) to 0.3" (0%) NONE Douglas Current TO 1159 PM SUN Trace (10%) to 0.1" (5%) to 0.3" (0%) NONE Jefferson Current TO 1159 PM SUN Trace (10%) to 0.1" (5%) to 0.3" (0%) NONE MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789    F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]