Flash Flood Prediction Program

Time: 120 AM Wed July 5, 2023 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1’S WILL BE ALLOWED TO EXPIRE AT 2AM Message 1’s will be allowed to expire at 2:00 AM as the threat for heavy rainfall has diminished. A few scattered showers currently, favoring eastern portions of the District at this time. Off and on showers/isolated thunderstorms will be possible over the next few hours. Storms have decreased significantly in intensity and should weaken to just showers over the next hour or two. Storm motions have picked up, with 20-30mph west to east movement. A chance for showers will likely continue through daybreak with another chance for storms tomorrow afternoon and evening. STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers will produce a TR-0.25” total, in 10-30 minutes. A weak to moderate thunderstorm could produce 0.25-0.50” total, in 10-30 minutes. WORST CASE SCENARIO: A moderate to strong thunderstorm, or training of thunderstorms has the potential to produce up to 1.0” in 45-60 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Arvada 1 Current TO 200 AM Current TO 130 AM the City of Aurora 1 Current TO 200 AM Current TO 130 AM Arapahoe County 1 Current TO 200 AM Current TO 130 AM DIA 1 Current TO 200 AM Current TO 130 AM Denver County 1 Current TO 200 AM Current TO 130 AM Douglas County 1 Current TO 200 AM Current TO 130 AM Adams County 1 Current TO 200 AM Current TO 130 AM Broomfield County 1 Current TO 200 AM Current TO 130 AM Jefferson County 1 Current TO 200 AM Current TO 130 AM Boulder County 1 Current TO 200 AM Current TO 130 AM Wheat Ridge 1 Current TO 200 AM Current TO 130 AM Lakewood 1 Current TO 200 AM Current TO 130 AM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 600 AM WED Trace (50%) to 0.25" (25%) to 0.5" (10%) LOW Arapahoe Current TO 600 AM WED Trace (50%) to 0.25" (25%) to 0.5" (10%) LOW Boulder Current TO 600 AM WED Trace (50%) to 0.25" (25%) to 0.5" (10%) LOW Broomfield Current TO 600 AM WED Trace (50%) to 0.25" (25%) to 0.5" (10%) LOW Denver Current TO 600 AM WED Trace (50%) to 0.25" (25%) to 0.5" (10%) LOW Douglas Current TO 600 AM WED Trace (50%) to 0.25" (25%) to 0.5" (10%) LOW Jefferson Current TO 600 AM WED Trace (50%) to 0.25" (25%) to 0.5" (10%) LOW Foothills above 6500ft       Boulder Current TO 600 AM WED Trace (50%) to 0.25" (25%) to 0.5" (10%) LOW Douglas Current TO 600 AM WED Trace (50%) to 0.25" (25%) to 0.5" (10%) LOW Jefferson Current TO 600 AM WED Trace (50%) to 0.25" (25%) to 0.5" (10%) LOW MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789    F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]