Time: 124 PM Tue August 6, 2024 Forecaster: Laura Smith ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- Messages have been issued for the entire District Messages have been issued for the entire District, effective until 10:00 PM. Storms have started to initiate along the foothills and are expected to start moving into the District over the next hour. Slow moving, gust-front driven storms are expected to propagate from west to east around 15-20 mph. However, gust fronts will likely result in additional, slower-moving thunderstorms which will have the potential for moderate to heavy rainfall. Heavy Rainfall is most likely to occur until 9:00 PM tonight. A few lingering showers may persist after 9pm, but with elevated moisture in place, any lingering showers will be efficient rainfall producers. Once showers dissipate, skies will clear through the overnight with temperatures dropping into the 60s. STORM RAINFALL POTENTIAL AND DURATION: Thunderstorms will have the potential to produce rainfall rates of 0.25”-0.75” in 10-30 minutes. A slow-moving thunderstorm or a large thunderstorm complex may result in up to 1.50” of rain in 45-60 minutes. WORST CASE SCENARIO: A slow-moving thunderstorm or a large thunderstorm complex may result in up to 1.50” of rain 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 TUE 0.25" (55%) to 0.5" (35%) to 0.75" (15%) ISSUED Arapahoe Current TO 1000 PM TUE 0.25" (55%) to 0.5" (35%) to 0.75" (15%) ISSUED Boulder Current TO 1000 PM TUE 0.25" (55%) to 0.5" (35%) to 0.75" (15%) ISSUED Broomfield Current TO 1000 PM TUE 0.25" (55%) to 0.5" (35%) to 0.75" (15%) ISSUED Denver Current TO 1000 PM TUE 0.25" (55%) to 0.5" (35%) to 0.75" (15%) ISSUED Douglas Current TO 1000 PM TUE 0.25" (55%) to 0.5" (35%) to 0.75" (15%) ISSUED Jefferson Current TO 1000 PM TUE 0.25" (55%) to 0.5" (35%) to 0.75" (15%) ISSUED Foothills above 6500ft       Boulder Current TO 1000 PM TUE 0.25" (55%) to 0.5" (35%) to 0.75" (15%) ISSUED Douglas Current TO 1000 PM TUE 0.25" (55%) to 0.5" (35%) to 0.75" (15%) ISSUED Jefferson Current TO 1000 PM TUE 0.25" (55%) to 0.5" (35%) to 0.75" (15%) 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]