Time: 911 AM Mon August 7, 2023 Forecaster: Laura Smith ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- ISOLATED AFTERNOON THUNDERSTORMS Warmer temperatures are expected today as the heat dome over the Desert Southwest begins to expand into the Four Corners region again. This morning will be sunny followed by afternoon temperatures in the low to mid 80s, dew points in the upper 40s to low 50s, with isolated showers and thunderstorms this afternoon. Storm motions will be fast, moving from west to east between 30 to 40 mph. Quick storm motions will help limit point rainfall amounts. 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" to 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: Training thunderstorms have the potential to produce 0.50” to 1.00” in 60 minutes. A LOOK AHEAD: 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 800 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Arapahoe 200 PM TO 800 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Boulder 200 PM TO 800 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Broomfield 200 PM TO 800 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Denver 200 PM TO 800 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Douglas 200 PM TO 800 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Jefferson 200 PM TO 800 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Foothills above 6500ft       Boulder 200 PM TO 800 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Douglas 200 PM TO 800 PM 0.1" (80%) to 0.25" (50%) to 0.5" (20%) LOW Jefferson 200 PM TO 800 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]