Flash Flood Prediction Program

Time: 145 AM Thu September 5, 2024 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGES WILL BE ALLOWED TO EXPIRE AT 3:00 AM Messages will be allowed to expire at 3am as the threat of heavy rainfall has come to an end. A few showers persist over eastern portions of the District at this time and will continue to move east/southeast and out of the District. A few off and on showers will be possible over the next hour or two, however the threat of heavy rainfall within the District ended. A few areas of patchy fog will be possible through the overnight and into daybreak tomorrow. Overnight temperatures will drop slightly more, into the low to mid 50s. A slight chance for a few showers to linger tomorrow morning, clearing out by mid-morning with another chance for afternoon and evening showers/thunderstorms. STORM RAINFALL POTENTIAL AND DURATION: Typical showers/thunderstorms will produce a trace-0.15” total in 10-30 minutes. A moderate to strong shower will produce 0.15”-0.30” total in 10-30 minutes. WORST CASE SCENARIO: A strong showers/weak to moderate thunderstorm or training of thunderstorm cells will have the potential to produce up to 0.75” in 45-60 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Boulder County 1 Current TO 300 AM Current TO 230 AM Jefferson County 1 Current TO 300 AM Current TO 230 AM Broomfield County 1 Current TO 300 AM Current TO 230 AM Douglas County 1 Current TO 300 AM Current TO 230 AM Adams County 1 Current TO 300 AM Current TO 230 AM Denver County 1 Current TO 300 AM Current TO 230 AM DIA 1 Current TO 300 AM Current TO 230 AM Arapahoe County 1 Current TO 300 AM Current TO 230 AM the City of Aurora 1 Current TO 300 AM Current TO 230 AM Arvada 1 Current TO 300 AM Current TO 230 AM Wheat Ridge 1 Current TO 300 AM Current TO 230 AM Lakewood 1 Current TO 300 AM Current TO 230 AM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 900 AM THU Trace (50%) to 0.15" (30%) to 0.3" (15%) NONE Arapahoe Current TO 900 AM THU Trace (50%) to 0.15" (30%) to 0.3" (15%) NONE Boulder Current TO 900 AM THU Trace (40%) to 0.15" (20%) to 0.3" (10%) NONE Broomfield Current TO 900 AM THU Trace (40%) to 0.15" (20%) to 0.3" (10%) NONE Denver Current TO 900 AM THU Trace (40%) to 0.15" (20%) to 0.3" (10%) NONE Douglas Current TO 900 AM THU Trace (40%) to 0.15" (20%) to 0.3" (10%) NONE Jefferson Current TO 900 AM THU Trace (40%) to 0.15" (20%) to 0.3" (10%) NONE Foothills above 6500ft       Boulder Current TO 900 AM THU Trace (40%) to 0.15" (20%) to 0.3" (10%) NONE Douglas Current TO 900 AM THU Trace (40%) to 0.15" (20%) to 0.3" (10%) NONE Jefferson Current TO 900 AM THU Trace (40%) to 0.15" (20%) to 0.3" (10%) NONE MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789    F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]