Flash Flood Prediction Program

Time: 1038 AM Fri May 24, 2024 Forecaster: Laura Smith ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- Slight chances for afternoon and evening showers and thunderstorms Cooler temperatures and sunny skies have emerged across the High Plains following last night’s cold front. Upper-level winds will gradually shift to southwesterly today, improving atmospheric moisture by the mid to late afternoon. Afternoon temperatures will reach the upper 60s to low 70s with dewpoints in the low 20s. These conditions will support slight chances for isolated afternoon and evening showers and thunderstorms capable of producing minimal precipitation. Skies will remain mostly cloudy overnight as the next wave advances into the region. STORM RAINFALL POTENTIAL AND DURATION: Typical showers will produce a trace to 0.05” total in 10-30 minutes. A moderate shower/thunderstorm will produce up to 0.10” in 10-30 minutes. WORST CASE SCENARIO: An isolated shower develops across the foothills and produces a trace to 0.15” of rainfall in up to 60 minutes. A LOOK AHEAD: On Saturday, skies will be partly to mostly cloudy as atmospheric moisture improves with the arrival of an upper-level trough. Isolated showers and thunderstorms are possible during the late afternoon and evening, followed by clearing skies overnight. Total rainfall amounts are expected to be minimal once again. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 400 PM TO 900 PM Trace (25%) to 0.05" (15%) to 0.1" (5%) NONE Arapahoe 400 PM TO 900 PM Trace (25%) to 0.05" (15%) to 0.1" (5%) NONE Boulder 400 PM TO 900 PM Trace (25%) to 0.05" (15%) to 0.1" (5%) NONE Broomfield 400 PM TO 900 PM Trace (25%) to 0.05" (15%) to 0.1" (5%) NONE Denver 400 PM TO 900 PM Trace (25%) to 0.05" (15%) to 0.1" (5%) NONE Douglas 400 PM TO 900 PM Trace (25%) to 0.05" (15%) to 0.1" (5%) NONE Jefferson 400 PM TO 900 PM Trace (25%) to 0.05" (15%) to 0.1" (5%) NONE Foothills above 6500ft       Boulder 300 PM TO 800 PM Trace (35%) to 0.05" (25%) to 0.1" (15%) NONE Douglas 300 PM TO 800 PM Trace (35%) to 0.05" (25%) to 0.1" (15%) NONE Jefferson 300 PM TO 800 PM Trace (35%) to 0.05" (25%) to 0.1" (15%) 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]