Time: 647 PM Tue August 1, 2023 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 2’S CONTINUE VALID UNTIL MIDNIGHT Message 2’s will remain valid until midnight, although the strongest storm development has moved well east of the District at this time. A few showers persist towards the northwestern portions of the District and will continue to slowly progress eastward over the next few hours. Rainfall rates have decreased, however elevated surface dew points suggest even moderate showers can produce brief heavy rainfall. Storms should gradually weaken through the rest of the evening, with off and on light showers possible through the overnight. STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers, weak thunderstorms will produce a 0.05-0.25” total in 10-30 minute. A moderate to strong thunderstorm will produce 0.25-1.00” total in 10-30 minutes. WORST CASE SCENARIO: A strong, anchored thunderstorm will have the potential to produce 2.00” in 45-60 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Lakewood 2 Current TO 1159 PM Current TO 1159 PM Wheat Ridge 2 Current TO 1159 PM Current TO 1159 PM Arvada 2 Current TO 1159 PM Current TO 1159 PM the City of Aurora 2 Current TO 1159 PM Current TO 1159 PM Arapahoe County 2 Current TO 1159 PM Current TO 1159 PM DIA 2 Current TO 1159 PM Current TO 1159 PM Denver County 2 Current TO 1159 PM Current TO 1159 PM Adams County 2 Current TO 1159 PM Current TO 1159 PM Douglas County 2 Current TO 1159 PM Current TO 1159 PM Broomfield County 2 Current TO 1159 PM Current TO 1159 PM Jefferson County 2 Current TO 1159 PM Current TO 1159 PM Boulder County 2 Current TO 1159 PM Current TO 1159 PM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 1159 PM TUE 0.05" (50%) to 0.25" (25%) to 1" (10%) ISSUED Arapahoe Current TO 1159 PM TUE 0.05" (50%) to 0.25" (25%) to 1" (10%) ISSUED Boulder Current TO 1159 PM TUE 0.05" (60%) to 0.25" (30%) to 1" (15%) ISSUED Broomfield Current TO 1159 PM TUE 0.05" (60%) to 0.25" (30%) to 1" (15%) ISSUED Denver Current TO 1159 PM TUE 0.05" (50%) to 0.25" (25%) to 1" (10%) ISSUED Douglas Current TO 1159 PM TUE 0.05" (50%) to 0.25" (25%) to 1" (10%) ISSUED Jefferson Current TO 1159 PM TUE 0.05" (50%) to 0.25" (25%) to 1" (10%) ISSUED Foothills above 6500ft       Boulder Current TO 1159 PM TUE 0.05" (60%) to 0.25" (30%) to 1" (15%) ISSUED Douglas Current TO 1159 PM TUE 0.05" (50%) to 0.25" (25%) to 1" (10%) ISSUED Jefferson Current TO 1159 PM TUE 0.05" (50%) to 0.25" (25%) to 1" (10%) 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]