Flash Flood Prediction Program

Time: 246 AM Sat August 20, 2022 Forecaster: Brad Simmons ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1'S WILL BE ALLOWED TO EXPIRE - Message 1's will be allowed to expire at 4:00 AM as the threat for heavy rainfall has ended. - An isolated light rain shower remains possible into mid-morning. Heavy rainfall is not expected. - Thunderstorms will become likely later this afternoon with stronger storms capable of producing heavy rain. STORM RAINFALL POTENTIAL AND DURATION: Isolated light rain showers will produce rainfall amounts of TR-0.3". COUNTY MESSAGE VALID TIMES PRIME TIME Boulder County 1 Current TO 400 AM Current TO 300 AM Jefferson County 1 Current TO 400 AM Current TO 300 AM Broomfield County 1 Current TO 400 AM Current TO 300 AM Douglas County 1 Current TO 400 AM Current TO 300 AM Adams County 1 Current TO 400 AM Current TO 300 AM Denver County 1 Current TO 400 AM Current TO 300 AM DIA 1 Current TO 400 AM Current TO 300 AM Arapahoe County 1 Current TO 400 AM Current TO 300 AM the City of Aurora 1 Current TO 400 AM Current TO 300 AM Arvada 1 Current TO 400 AM Current TO 300 AM Wheat Ridge 1 Current TO 400 AM Current TO 300 AM Lakewood 1 Current TO 400 AM Current TO 300 AM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 900 AM SAT Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Arapahoe Current TO 900 AM SAT Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Boulder Current TO 900 AM SAT Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Broomfield Current TO 900 AM SAT Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Denver Current TO 900 AM SAT Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Douglas Current TO 900 AM SAT Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Jefferson Current TO 900 AM SAT Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Foothills above 6500ft       Boulder Current TO 900 AM SAT Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Douglas Current TO 900 AM SAT Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Jefferson Current TO 900 AM SAT Trace (40%) to 0.1" (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]