Time: 656 PM Fri August 19, 2022 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1'S CONTINUE VALID - Message 1's issued for the entire District will continue valid until 10:00 PM - A line of storms has developed, first initiating in Adams County before strengthening southward into Aurora and Arapahoe Counties. These storms briefly produced heavy rain and are now moving eastward and out of the District. - Outflow boundaries have resulted in additional storm development towards DIA and will have the potential to produce more storms across the District through the few hours. STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers/thunderstorms will produce a trace to 0.2" in 10-30 minutes. A moderate to stronger rain shower/thunderstorm could produce 0.2-0.6" in 10-30 minutes. WORST CASE SCENARIO: An anchored, strong thunderstorm has the potential to produce 0.6-1.2" in 45-60 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Boulder County 1 Current TO 1000 PM Current TO 900 PM Jefferson County 1 Current TO 1000 PM Current TO 900 PM Broomfield County 1 Current TO 1000 PM Current TO 900 PM Douglas County 1 Current TO 1000 PM Current TO 900 PM Adams County 1 Current TO 1000 PM Current TO 900 PM Denver County 1 Current TO 1000 PM Current TO 900 PM DIA 1 Current TO 1000 PM Current TO 900 PM Arapahoe County 1 Current TO 1000 PM Current TO 900 PM the City of Aurora 1 Current TO 1000 PM Current TO 900 PM Arvada 1 Current TO 1000 PM Current TO 900 PM Wheat Ridge 1 Current TO 1000 PM Current TO 900 PM Lakewood 1 Current TO 1000 PM Current TO 900 PM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 1000 PM FRI Trace (50%) to 0.2" (25%) to 0.6" (10%) ISSUED Arapahoe Current TO 1000 PM FRI Trace (50%) to 0.2" (25%) to 0.6" (10%) ISSUED Boulder Current TO 1000 PM FRI Trace (30%) to 0.2" (10%) to 0.6" (5%) ISSUED Broomfield Current TO 1000 PM FRI Trace (40%) to 0.2" (20%) to 0.6" (5%) ISSUED Denver Current TO 1000 PM FRI Trace (50%) to 0.2" (25%) to 0.6" (10%) ISSUED Douglas Current TO 1000 PM FRI Trace (50%) to 0.2" (25%) to 0.6" (10%) ISSUED Jefferson Current TO 1000 PM FRI Trace (30%) to 0.2" (10%) to 0.6" (5%) ISSUED Foothills above 6500ft       Boulder Current TO 1000 PM FRI Trace (30%) to 0.2" (10%) to 0.6" (5%) ISSUED Douglas Current TO 1000 PM FRI Trace (40%) to 0.2" (20%) to 0.6" (10%) ISSUED Jefferson Current TO 1000 PM FRI Trace (30%) to 0.2" (10%) to 0.6" (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]