Time: 946 AM Tue August 20, 2024 Forecaster: Laura Smith ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- Hot with a slight chance for afternoon showers. High pressure ridging continues to build across the intermountain west, supporting dryer and warmer conditions in the District today. This afternoon will be drier compared to yesterday, with only a slight chance of high-based showers and thunderstorms. High temperatures will be in the 90s with dewpoints in the mid 40s and precipitable water (PWAT) values around 0.80”. Any storms that do manage to form today will be moving east around 20mph. STORM RAINFALL POTENTIAL AND DURATION: Showers and thunderstorms today have the potential to produce between a trace to 0.20” in 10-30 minutes. WORST CASE SCENARIO: A strong thunderstorm may be capable of producing 0.40” or more in 30 minutes or less. A LOOK AHEAD: On Wednesday, a weak shortwave trough will move across far northwest Colorado, bringing scattered showers and thunderstorms during the afternoon and evening. Temperatures will remain in the 90s. Thursday will be similar to Wednesday, with scattered showers and thunderstorms expected throughout the day. Early convection may limit afternoon temperatures to the upper 80s across the plains. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 300 PM TO 900 PM Trace (20%) to 0.1" (15%) to 0.2" (10%) NONE Arapahoe 300 PM TO 900 PM Trace (20%) to 0.1" (15%) to 0.2" (10%) NONE Boulder 300 PM TO 900 PM Trace (20%) to 0.1" (15%) to 0.2" (10%) NONE Broomfield 300 PM TO 900 PM Trace (20%) to 0.1" (15%) to 0.2" (10%) NONE Denver 300 PM TO 900 PM Trace (20%) to 0.1" (15%) to 0.2" (10%) NONE Douglas 300 PM TO 900 PM Trace (20%) to 0.1" (15%) to 0.2" (10%) NONE Jefferson 300 PM TO 900 PM Trace (20%) to 0.1" (15%) to 0.2" (10%) NONE Foothills above 6500ft       Boulder 300 PM TO 900 PM Trace (20%) to 0.1" (15%) to 0.2" (10%) NONE Douglas 300 PM TO 900 PM Trace (20%) to 0.1" (15%) to 0.2" (10%) NONE Jefferson 300 PM TO 900 PM Trace (20%) to 0.1" (15%) to 0.2" (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]