Flash Flood Prediction Program

Time: 1004 AM Fri June 24, 2022 Forecaster: Justin Brooks ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- ANOTHER ROUND OF ISOLATED AFTERNOON/EARLY EVE RAIN SHOWERS/THUNDERSTORMS - Mid level moisture advection from the Pacific will create conditions for another round of light to moderate rainfall this afternoon and early evening. Current temperatures are in the upper 70's to low 80's across the District and will continue to climb into the upper 80's to low 90's by this afternoon, with dew points in the low to mid 40's. - Scattered afternoon showers and thunderstorms are expected primarily across the foothills and Palmer Divide. A few isolated showers will roll off the foothills and into the District between 2pm to 6pm. - By sunset, rain shower activity will decrease with skies clearing through the overnight hours. A cool front will sweep across the plains overnight, positioning a cooler airmass over the state. Overnight lows will drop into the upper 50's on the plains with mid 40's across the foothills. STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak thunderstorms will produce a trace to 0.1" in 30 minutes or less. WORST CASE SCENARIO: A stronger thunderstorm or training of thunderstorm cells may result in up to 0.4" of rainfall in 30 minutes or less. A LOOK AHEAD: High temperatures on Saturday will reach the upper 70's to low 80's as cloud cover increases throughout the day. Widespread showers and thunderstorms capable of producing moderate rainfall will begin to develop Saturday afternoon, persisting into the evening. Light rain showers may linger overnight and into Sunday morning. The Front Range Urban Corridor will continue cooling on Sunday as highs reach the mid 70's. Showers and thunderstorms are expected throughout the day and into the overnight hours. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 100 PM TO 800 PM Trace (50%) to 0.1" (25%) to 0.2" (10%) NONE Arapahoe 100 PM TO 800 PM Trace (50%) to 0.1" (25%) to 0.2" (10%) NONE Broomfield 100 PM TO 800 PM Trace (50%) to 0.1" (25%) to 0.2" (10%) NONE Denver 100 PM TO 800 PM Trace (50%) to 0.1" (25%) to 0.2" (10%) NONE Douglas 100 PM TO 800 PM Trace (50%) to 0.1" (25%) to 0.2" (10%) NONE Boulder 1200 PM TO 800 PM Trace (60%) to 0.1" (40%) to 0.2" (15%) NONE Jefferson 1200 PM TO 800 PM Trace (60%) to 0.1" (40%) to 0.2" (15%) NONE Foothills above 6500ft       Boulder 1200 PM TO 800 PM Trace (60%) to 0.1" (40%) to 0.2" (15%) NONE Douglas 1200 PM TO 800 PM Trace (60%) to 0.1" (40%) to 0.2" (15%) NONE Jefferson 1200 PM TO 800 PM Trace (60%) to 0.1" (40%) to 0.2" (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]