Flash Flood Prediction Program

Time: 914 AM Thu September 22, 2022 Forecaster: Laura Smith ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- COOL AND OVERCAST WITH LIGHT RAIN ACROSS THE DISTRICT - An upper-level low will continue to transport tropical moisture into Colorado, supporting cool temperatures and stratified rain across the Front Range Urban Corridor today. - Afternoon high temperatures will reach the upper 50s to low 60s, dewpoints in the mid 50s, with sprinkles to light rainfall persisting through the late morning and into the evening. Prime time for showers will be from noon to 7PM. - Skies will begin clearing overnight as the upper-level low begins to lift out of the Great Basin. Overnight lows are expected to drop into the upper 40s to low 50s on the plains, Upper 30's across the foothills. STORM RAINFALL POTENTIAL AND DURATION: Rain showers will produce rainfall rates of trace to 0.2" in 30-60 minutes. WORST CASE SCENARIO: Training showers are able to develop with the potential to produce brief heavy rainfall of 0.2-0.4" in 30-60 minutes. A LOOK AHEAD: High-pressure ridging over Texas will expand northward tomorrow, transporting warm and dry air into the region. As a result, tomorrow will be sunny and uneventful as high temperatures reach the upper 70s to low 80s. Saturday will be similar with highs in the upper 70s to low 80s under clear and sunny skies. LOCATION PRIME TIME 60-Minute Rainfall and % Probability Message Potential Plains       Adams 1200 PM TO 700 PM Trace (100%) to 0.1" (75%) to 0.2" (50%) NONE Arapahoe 1200 PM TO 700 PM Trace (100%) to 0.1" (75%) to 0.2" (50%) NONE Boulder 1200 PM TO 700 PM Trace (100%) to 0.1" (75%) to 0.2" (50%) NONE Broomfield 1200 PM TO 700 PM Trace (100%) to 0.1" (75%) to 0.2" (50%) NONE Denver 1200 PM TO 700 PM Trace (100%) to 0.1" (75%) to 0.2" (50%) NONE Douglas 1200 PM TO 700 PM Trace (100%) to 0.1" (75%) to 0.2" (50%) NONE Jefferson 1200 PM TO 700 PM Trace (100%) to 0.1" (75%) to 0.2" (50%) NONE Foothills above 6500ft       Boulder 1100 AM TO 700 PM Trace (100%) to 0.2" (75%) to 0.4" (50%) NONE Douglas 1100 AM TO 700 PM Trace (100%) to 0.2" (75%) to 0.4" (50%) NONE Jefferson 1100 AM TO 700 PM Trace (100%) to 0.2" (75%) to 0.4" (50%) 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]