Flash Flood Prediction Program

Time: 848 AM Sun August 28, 2022 Forecaster: Brad Simmons ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- ISOLATED/HIGH-BASED AFTERNOON THUNDERSTORMS - Temperatures will continue to run above seasonal averages for the date with afternoon highs topping out in the upper 80's to lower 90's over the plains with 70's and 80's in the Front Range foothills. Normal high for Denver today is 86 degrees. Surface moisture is lacking but there is enough mid and high level moisture to result in a build-up of clouds this afternoon and isolated thunderstorm activity. - Isolated thunderstorms will develop over the higher terrain between 1-2pm and then spread out onto the plains after 2pm with chances through about sunset. After sunset dry conditions will develop and continue through the remainder of the evening and overnight period. - Showers and weak thunderstorms will be high-based producing minimal rainfall and gusty winds. Winds may gust up to 30-40mph or more briefly in and near active storms. Typical storms will produce mainly just some sprinkles but a few areas will likely pick up measurable rain. There is no threat for heavy rainfall. Storms will move from W to E at around 15mph. STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak thunderstorms will produce a trace to 0.2" of rain. A LOOK AHEAD: Temperatures will continue to run in the upper 80's to lower 90's for highs over the plains on Monday with dry conditions over the District. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 200 PM TO 700 PM Trace (40%) to 0.1" (20%) to 0.2" (5%) NONE Arapahoe 200 PM TO 700 PM Trace (40%) to 0.1" (20%) to 0.2" (5%) NONE Boulder 200 PM TO 700 PM Trace (50%) to 0.1" (25%) to 0.2" (5%) NONE Broomfield 200 PM TO 700 PM Trace (40%) to 0.1" (20%) to 0.2" (5%) NONE Denver 200 PM TO 700 PM Trace (40%) to 0.1" (20%) to 0.2" (5%) NONE Douglas 200 PM TO 700 PM Trace (50%) to 0.1" (25%) to 0.2" (5%) NONE Jefferson 200 PM TO 700 PM Trace (50%) to 0.1" (25%) to 0.2" (5%) NONE Foothills above 6500ft       Boulder 100 PM TO 700 PM Trace (60%) to 0.1" (30%) to 0.2" (10%) NONE Douglas 100 PM TO 700 PM Trace (60%) to 0.1" (30%) to 0.2" (10%) NONE Jefferson 100 PM TO 700 PM Trace (60%) to 0.1" (30%) to 0.2" (10%) 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]