Time: 941 AM Fri August 23, 2024 Forecaster: Laura Smith ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- Isolated to Scattered Afternoon and Evening Showers and Thunderstorms High pressure ridging continues to transport Monsoonal moisture into the Four-Corners region, supporting isolated to scattered storms this week and through the weekend. Today, a trough moving over the west coast will amplify the ridge over the Central Plains, creating a capping inversion across the District. This inversion will inhibit storm development until the mid to late afternoon, resulting in isolated to scattered storm coverage. High temperatures will be around 90°F, with dewpoints in the low 50s and precipitable water (PWAT) values around 1.05”. Storm motions will be from west to east around 20-25 mph. Quick storm motions will help limit point rainfall amounts. STORM RAINFALL POTENTIAL AND DURATION: Showers and thunderstorms today have the potential to produce between 0.30”-0.70” in 10-30 minutes. WORST CASE SCENARIO: A strong thunderstorm, or slower moving storm, may be capable of producing 1.50” or more in 30-60 minutes. A LOOK AHEAD: Saturday will be warm with highs around 90°F once again and slight chances for isolated showers and thunderstorms. Very little change to this pattern is expected on Sunday as highs hover around 90°F with chances for isolated showers and thunderstorms. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 200 PM TO 1000 PM 0.3" (70%) to 0.5" (50%) to 0.7" (30%) LOW Arapahoe 200 PM TO 1000 PM 0.3" (70%) to 0.5" (50%) to 0.7" (30%) LOW Boulder 200 PM TO 1000 PM 0.3" (70%) to 0.5" (50%) to 0.7" (30%) LOW Broomfield 200 PM TO 1000 PM 0.3" (70%) to 0.5" (50%) to 0.7" (30%) LOW Denver 200 PM TO 1000 PM 0.3" (70%) to 0.5" (50%) to 0.7" (30%) LOW Douglas 200 PM TO 1000 PM 0.3" (70%) to 0.5" (50%) to 0.7" (30%) LOW Jefferson 200 PM TO 1000 PM 0.3" (70%) to 0.5" (50%) to 0.7" (30%) LOW Foothills above 6500ft       Boulder 200 PM TO 1000 PM 0.3" (70%) to 0.5" (50%) to 0.7" (30%) LOW Douglas 200 PM TO 1000 PM 0.3" (70%) to 0.5" (50%) to 0.7" (30%) LOW Jefferson 200 PM TO 1000 PM 0.3" (70%) to 0.5" (50%) to 0.7" (30%) 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]