Flash Flood Prediction Program

Time: 1034 AM Sat May 11, 2024 Forecaster: Laura Smith ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- Scattered Showers and Thunderstorms Today and Tonight. Spring weather continues across the District as an upper-level cut off low and its associated moisture plume moves over the four-corners region today. Warmer temperatures are expected today with highs in the upper 60s to low 70s, dewpoints in the upper 30s to low 40s. Chances for scattered showers and thunderstorms will improve by the afternoon and evening. Storm motions will be from the southwest around 20 mph. Chances for showers and thunderstorms will gradually decline overnight. STORM RAINFALL POTENTIAL AND DURATION: Typical showers will produce light rainfall of up to 0.15” total in 15-30 minutes. WORST CASE SCENARIO: Stronger showers blowing off the foothills have the potential to produce up to 0.25” total rainfall 15-30 minutes. A LOOK AHEAD: On Sunday, the cut-off low will begin shifting east, supporting chances for showers and thunderstorms Sunday afternoon and evening. Afternoon temperatures will be in the mid to upper 60s with dewpoints in the upper 30s to low 40s. Storm motions will be from the north around 20 mph. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 500 PM TO 900 PM 0.05" (75%) to 0.15" (50%) to 0.25" (25%) NONE Arapahoe 500 PM TO 900 PM 0.05" (75%) to 0.15" (50%) to 0.25" (25%) NONE Boulder 500 PM TO 900 PM 0.05" (75%) to 0.15" (50%) to 0.25" (25%) NONE Broomfield 500 PM TO 900 PM 0.05" (75%) to 0.15" (50%) to 0.25" (25%) NONE Denver 500 PM TO 900 PM 0.05" (75%) to 0.15" (50%) to 0.25" (25%) NONE Douglas 500 PM TO 900 PM 0.05" (75%) to 0.15" (50%) to 0.25" (25%) NONE Jefferson 500 PM TO 900 PM 0.05" (75%) to 0.15" (50%) to 0.25" (25%) NONE Foothills above 6500ft       Boulder 300 PM TO 900 PM 0.05" (75%) to 0.15" (50%) to 0.25" (25%) NONE Douglas 300 PM TO 900 PM 0.1" (75%) to 0.2" (50%) to 0.3" (25%) NONE Jefferson 300 PM TO 900 PM 0.1" (75%) to 0.2" (50%) to 0.3" (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]