Time: 837 AM Wed August 4, 2021 Forecaster: Justin Brooks ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- SLIGHTLY WARMER TODAY WITH A VERY SLIGHT CHANCE FOR LATE AFTERNOON RAIN SHOWERS/ISOLATED THUNDERSTORMS - A few lingering rain showers this morning have since moved eastward and out of the District at this time. Partly cloudy skies remain and will continue throughout the day with a very slight chance for widely scattered late afternoon rain showers/isolated thunderstorms. - Temperatures today will reach the low to mid 80's on the plains with low to mid 70's along the foothills. Most areas will be expected to stay dry today, however a few rain showers/isolated may develop along the foothills this afternoon with a very slight chance any rain showers/isolated thunderstorms move into the District. Best chance will be from 3-7pm with skies clearing through the rest of the evening. Dew points are currently elevated, in the mid 50's, as lingering low-level moisture remains in place. This low--level moisture is expected to mix out as the morning progresses, however, if the elevated surface moisture remains in place, there will be a better chance for rain showers/thunderstorms later this afternoon and into the early evening. - Overnight will be mild with temperatures dropping into the upper 50's to low 60's on the plains with low to mid 50's along the foothills. STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers will produce a TR-0.2" in 10-30 minutes. A weak to moderate thunderstorm could produce 0.2-0.4" in 10-30 minutes. WORST CASE SCENARIO: A strong thunderstorm formed off an outflow boundary, or training of moderate thunderstorm cells has the potential to produce 1.2" in under 60 minutes. A LOOK AHEAD: Haze and high-pressure to return late this evening, through the rest of the week and into this weekend. Temperatures will be on the increase tomorrow as highs are expected to flirt with 90 degrees for most areas in the District. as the high-pressure ridge returns, dry conditions are expected to accompany the ridge over the next several days along with temperatures well into the 90's by this weekend. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 300 PM TO 700 PM Trace (25%) to 0.2" (15%) to 0.4" (5%) NONE Arapahoe 300 PM TO 700 PM Trace (25%) to 0.2" (15%) to 0.4" (5%) NONE Boulder 300 PM TO 700 PM Trace (25%) to 0.2" (15%) to 0.4" (5%) NONE Broomfield 300 PM TO 700 PM Trace (25%) to 0.2" (15%) to 0.4" (5%) NONE Denver 300 PM TO 700 PM Trace (25%) to 0.2" (15%) to 0.4" (5%) NONE Douglas 300 PM TO 700 PM Trace (25%) to 0.2" (15%) to 0.4" (5%) NONE Jefferson 300 PM TO 700 PM Trace (25%) to 0.2" (15%) to 0.4" (5%) NONE Foothills above 6500ft       Boulder 300 PM TO 700 PM Trace (40%) to 0.2" (25%) to 0.4" (10%) NONE Douglas 300 PM TO 700 PM Trace (40%) to 0.2" (25%) to 0.4" (10%) NONE Jefferson 300 PM TO 700 PM Trace (40%) to 0.2" (25%) to 0.4" (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]