Flash Flood Prediction Program

Time: 856 AM Sat September 10, 2022 Forecaster: Brad Simmons ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- A COOL, CLOUDY AND DRIZZLY DAY - Conditions will be cool, cloudy and drizzly through the day today with conditions slowly improving this afternoon and evening. Highs today will only warm into the 40's over the foothills with low and mid 50's over the plains as cloud cover will remain in place all day. - A widespread light rain or mist/drizzle will continue through the morning with conditions slowly drying out this afternoon and evening. The more persistent precipitation will be through early afternoon then coverage of light showers/mist/drizzle is expected to decrease this afternoon and eventually dry out ahead of midnight tonight. Areas of fog will develop after midnight and will persist into Sunday morning. - Total precipitation overnight has generally ranged from 0.25-0.75" with isolated higher and lower amounts. Another 0.10-0.30" of moisture is expected through the day favoring up-slope prone areas in and near the foothills. Overnight lows will dip into the lower 40's over the plains with some 30's for the higher terrain. STORM RAINFALL POTENTIAL AND DURATION: Light rain showers and mist/drizzle will produce rainfall rates of a trace to 0.15" in 30-60 minutes. A LOOK AHEAD: Areas of fog early Sunday morning will give way to sunny/mostly sunny skies allowing temperatures to warm into the 70's to around 80 over the plains. Conditions will be dry District wide. LOCATION PRIME TIME 60-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 1000 PM SAT Trace (100%) to 0.1" (75%) to 0.2" (25%) NONE Arapahoe Current TO 1000 PM SAT Trace (100%) to 0.1" (75%) to 0.2" (25%) NONE Boulder Current TO 1000 PM SAT Trace (100%) to 0.1" (75%) to 0.2" (25%) NONE Broomfield Current TO 1000 PM SAT Trace (100%) to 0.1" (75%) to 0.2" (25%) NONE Denver Current TO 1000 PM SAT Trace (100%) to 0.1" (75%) to 0.2" (25%) NONE Douglas Current TO 1000 PM SAT Trace (100%) to 0.1" (75%) to 0.2" (25%) NONE Jefferson Current TO 1000 PM SAT Trace (100%) to 0.1" (75%) to 0.2" (25%) NONE Foothills above 6500ft       Boulder Current TO 1000 PM SAT Trace (100%) to 0.1" (75%) to 0.2" (25%) NONE Douglas Current TO 1000 PM SAT Trace (100%) to 0.1" (75%) to 0.2" (25%) NONE Jefferson Current TO 1000 PM SAT Trace (100%) to 0.1" (75%) to 0.2" (25%) 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]