Time: 916 PM Wed July 21, 2021 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1'S WILL BE ALLOWED TO EXPIRE AT 10:00 PM - Message 1's issued for the entire District will be allowed to expire at 10:00pm as the threat for heavy rainfall has come to an end. - Heavier than usual rainfall impacted areas in Douglas and Elbert County just S and SE of the District earlier this evening. A few lingering light rain showers persist to the south and along the higher terrain in the foothills at this time. These showers will continue to gradually decrease over the next couple of hours with dry conditions expected through the overnight and into Thursday. - Overnight lows will drop into the 60's for the plains with upper 50's to around 60 for the foothills. STORM RAINFALL POTENTIAL AND DURATION: light rain showers will produce a trace to 0.10" in 10-30 minutes. WORST CASE SCENARIO: a moderate rain shower could produce 0.1-0.3" in 10-30 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Boulder County 1 Current TO 1000 PM Current TO 1000 PM Jefferson County 1 Current TO 1000 PM Current TO 1000 PM Broomfield County 1 Current TO 1000 PM Current TO 1000 PM Douglas County 1 Current TO 1000 PM Current TO 1000 PM Adams County 1 Current TO 1000 PM Current TO 1000 PM Denver County 1 Current TO 1000 PM Current TO 1000 PM DIA 1 Current TO 1000 PM Current TO 1000 PM Arapahoe County 1 Current TO 1000 PM Current TO 1000 PM the City of Aurora 1 Current TO 1000 PM Current TO 1000 PM Arvada 1 Current TO 1000 PM Current TO 1000 PM Wheat Ridge 1 Current TO 1000 PM Current TO 1000 PM Lakewood 1 Current TO 1000 PM Current TO 1000 PM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 1159 PM WED Trace (10%) to 0.1" (5%) to 0.3" (0%) ISSUED Arapahoe Current TO 1159 PM WED Trace (10%) to 0.1" (5%) to 0.3" (0%) ISSUED Boulder Current TO 1159 PM WED Trace (10%) to 0.1" (5%) to 0.3" (0%) ISSUED Broomfield Current TO 1159 PM WED Trace (10%) to 0.1" (5%) to 0.3" (0%) ISSUED Denver Current TO 1159 PM WED Trace (10%) to 0.1" (5%) to 0.3" (0%) ISSUED Douglas Current TO 1159 PM WED Trace (30%) to 0.1" (10%) to 0.3" (5%) ISSUED Jefferson Current TO 1159 PM WED Trace (30%) to 0.1" (10%) to 0.3" (5%) ISSUED Foothills above 6500ft       Boulder Current TO 1159 PM WED Trace (30%) to 0.1" (10%) to 0.3" (5%) ISSUED Douglas Current TO 1159 PM WED Trace (30%) to 0.1" (10%) to 0.3" (5%) ISSUED Jefferson Current TO 1159 PM WED Trace (30%) to 0.1" (10%) to 0.3" (5%) ISSUED MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789    F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]