Time: 737 AM Sun July 9, 2023 Forecaster: Justin Brooks ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- WARMER, MILD AND GENERALLY DRY Westerly upper-level flow aloft will turn northwesterly throughout the day today. This will likely result in dry conditions across the District today, this afternoon and through this evening. A slight chance for a few high-based showers/isolated thunderstorms along the higher terrain and Palmer Divide. A very slight chance any of these showers will move into the District this afternoon and evening. If any shower activity does move into the District, minimal rainfall will reach the surface as most rain showers mix out as they move off the higher terrain. High temperatures today will reach the 80’s under mostly sunny skies. Overnight lows will drop into the upper 50’s to around 60 on the plains with low to mid 50’s along the foothills. STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers will produce a TR-0.10” total, in 10-30 minutes. A weak thunderstorm could produce 0.10-0.30” total in 10-30 minutes. WORST CASE SCENARIO: A stronger thunderstorm is able to develop will have the potential to produce up to 0.6” total, in under 60 minutes. A LOOK AHEAD: High-pressure continues to build through the week resulting in mostly dry conditions for the District. A slight chance will continue through the week for high-based showers/isolated thunderstorms, however, shower activity should remain along the higher elevations, with minimal, if any, precipitation for the District through the week. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 100 PM TO 700 PM Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE Arapahoe 100 PM TO 700 PM Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE Boulder 100 PM TO 700 PM Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE Broomfield 100 PM TO 700 PM Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE Denver 100 PM TO 700 PM Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE Douglas 100 PM TO 700 PM Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE Jefferson 100 PM TO 700 PM Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE Foothills above 6500ft       Boulder 100 PM TO 700 PM Trace (30%) to 0.1" (20%) to 0.3" (10%) NONE Douglas 100 PM TO 700 PM Trace (30%) to 0.1" (20%) to 0.3" (10%) NONE Jefferson 100 PM TO 700 PM Trace (30%) to 0.1" (20%) to 0.3" (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]