Time: 940 AM Sun August 6, 2023 Forecaster: Laura Smith ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- ISOLATED TO SCATTERED THUNDERSTORMS THIS AFTERNOON AND INTO THIS EVENING Cooler temperatures are expected for most of the District today following last night’s cold front. A broad stratus deck has developed across the area, resulting in mostly overcast skies this morning. Cloud cover is expected through the afternoon, with patches of sun possible. Isolated to scattered showers and thunderstorms are likely this afternoon through evening. Dew points will reach the low 50s today, with PWAT values between 0.85” to 0.95”. While these conditions would normally support higher potential 30-minute rainfall amounts, cooler temperatures and cloud cover will help limit storm development across the District. Thunderstorm activity is expected to subside across the Front Range Urban Corridor by this evening. STORM RAINFALL POTENTIAL AND DURATION: Typical thunderstorms will produce rainfall of 0.10”-0.25” total in 10-30 minutes. Strong storms have the potential to produce heavy rainfall of 0.25” to 0.50” total in 10-30 minutes. WORST CASE SCENARIO: Anchored thunderstorms have the potential to produce 0.50” to 1.50” in 60 minutes. A LOOK AHEAD: Warmer temperatures are expected tomorrow as the heat dome over the Desert Southwest begins to expand into the Four Corners region again. Afternoon temperatures will reach the low to mid 80s with isolated afternoon showers and thunderstorms. Warmer and dryer conditions move into the state Tuesday with highs in the mid to upper 80s under mostly sunny skies with a slight chance for isolated afternoon showers and thunderstorms. The warming trend continues into the remainder of the week with sunny skies and highs in the upper 80s to mid 90s. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 200 PM TO 1000 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Arapahoe 200 PM TO 1000 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Boulder 200 PM TO 1000 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Broomfield 200 PM TO 1000 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Denver 200 PM TO 1000 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Douglas 200 PM TO 1000 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Jefferson 200 PM TO 1000 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Foothills above 6500ft       Boulder 200 PM TO 1000 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Douglas 200 PM TO 1000 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Jefferson 200 PM TO 1000 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789    F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]