Flash Flood Prediction Program

Time: 658 PM Mon August 15, 2022 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1'S & 2'S WILL CONTINUE VALID UNTIL 11:59 PM - Message 1's and 2's will continue valid until 11:59pm. - Strong storms impacted the District this afternoon and evening and have since moved eastward and out of the District. A few lingering light to isolated briefly moderate rain showers persist at this time and will continue off and on over the next few hours. A chance Messages will expire prior to 11:59pm as the stronger storms stabilized the region this afternoon. - After midnight skies should start to clear with overnight lows dropping into the upper 50's to low 60's by daybreak Tuesday. STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers will produce a trace to 0.3" of rainfall in 10-30 minutes. A moderate rain shower/weak thunderstorm could produce 0.3-0.8" of rainfall in 10-30 minutes. WORST CASE SCENARIO: A moderate to strong thunderstorm has the potential to produce 0.8-1.6" in 30-60 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Boulder County 2 Current TO 1159 PM Current TO 1159 PM Jefferson County 2 Current TO 1159 PM Current TO 1159 PM Broomfield County 1 Current TO 1159 PM Current TO 1159 PM Douglas County 2 Current TO 1159 PM Current TO 1159 PM Adams County 1 Current TO 1159 PM Current TO 1159 PM Denver County 1 Current TO 1159 PM Current TO 1159 PM DIA 1 Current TO 1159 PM Current TO 1159 PM Arapahoe County 1 Current TO 1159 PM Current TO 1159 PM the City of Aurora 1 Current TO 1159 PM Current TO 1159 PM Arvada 2 Current TO 1159 PM Current TO 1159 PM Wheat Ridge 2 Current TO 1159 PM Current TO 1159 PM Lakewood 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 MON Trace (50%) to 0.3" (25%) to 0.8" (5%) ISSUED Arapahoe Current TO 1159 PM MON Trace (50%) to 0.3" (25%) to 0.8" (5%) ISSUED Boulder Current TO 1159 PM MON Trace (50%) to 0.3" (25%) to 0.8" (5%) ISSUED Broomfield Current TO 1159 PM MON Trace (50%) to 0.3" (25%) to 0.8" (5%) ISSUED Denver Current TO 1159 PM MON Trace (50%) to 0.3" (25%) to 0.8" (5%) ISSUED Douglas Current TO 1159 PM MON Trace (50%) to 0.3" (25%) to 0.8" (5%) ISSUED Jefferson Current TO 1159 PM MON Trace (50%) to 0.3" (25%) to 0.8" (5%) ISSUED Foothills above 6500ft       Boulder Current TO 1159 PM MON Trace (60%) to 0.3" (30%) to 0.8" (10%) ISSUED Douglas Current TO 1159 PM MON Trace (60%) to 0.3" (30%) to 0.8" (10%) ISSUED Jefferson Current TO 1159 PM MON Trace (60%) to 0.3" (30%) to 0.8" (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]