Time: 122 PM Fri July 29, 2022 Forecaster: Laura Smith ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1'S ISSUED FOR THE ENTIRE DISTRICT - Message 1's have been issued for the entire District and will be valid until 800pm this evening. - We are expecting one or two rounds of thunderstorms this afternoon, initiating across higher terrain during the early afternoon, moving across lower elevations mid to late afternoon. Prime time is between 3pm and 7pm, with a small chance an isolated storm or two is kicked up via outflow boundary from storms east of the District after 7pm. - Storm motions will be slower today; ESE at 10-15 mph. Thunderstorms will be capable of producing heavy rain. Briefly anchored or slower moving storms may create runoff or localized flooding. Due to recent rains, the ground is saturated in some areas, creating conditions for more rapid runoff across the District. STORM RAINFALL POTENTIAL AND DURATION: Weak thunderstorms will produce 0.3-1.0" in 10-30 minutes. Moderate to strong thunderstorms will have the potential to produce 1.0-2.0" in 10-30 minutes. WORST CASE SCENARIO: A strong anchored thunderstorm or a slower moving large thunderstorm may result in rainfall rates up to 3.0" in 45-75 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Boulder County 1 100 PM TO 800 PM 130 PM TO 700 PM Lakewood 1 100 PM TO 800 PM 130 PM TO 700 PM Wheat Ridge 1 100 PM TO 800 PM 130 PM TO 700 PM Arvada 1 100 PM TO 800 PM 130 PM TO 700 PM the City of Aurora 1 100 PM TO 800 PM 130 PM TO 700 PM Arapahoe County 1 100 PM TO 800 PM 130 PM TO 700 PM DIA 1 100 PM TO 800 PM 130 PM TO 700 PM Denver County 1 100 PM TO 800 PM 130 PM TO 700 PM Adams County 1 100 PM TO 800 PM 130 PM TO 700 PM Douglas County 1 100 PM TO 800 PM 130 PM TO 700 PM Broomfield County 1 100 PM TO 800 PM 130 PM TO 700 PM Jefferson County 1 100 PM TO 800 PM 130 PM TO 700 PM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 800 PM FRI 0.2" (60%) to 0.6" (30%) to 1.8" (15%) ISSUED Arapahoe Current TO 800 PM FRI 0.2" (60%) to 0.6" (30%) to 1.8" (15%) ISSUED Boulder Current TO 800 PM FRI 0.2" (60%) to 0.6" (30%) to 1.8" (15%) ISSUED Broomfield Current TO 800 PM FRI 0.2" (60%) to 0.6" (30%) to 1.8" (15%) ISSUED Denver Current TO 800 PM FRI 0.2" (60%) to 0.6" (30%) to 1.8" (15%) ISSUED Douglas Current TO 800 PM FRI 0.2" (60%) to 0.6" (30%) to 1.8" (15%) ISSUED Jefferson Current TO 800 PM FRI 0.2" (60%) to 0.6" (30%) to 1.8" (15%) ISSUED Foothills above 6500ft       Boulder Current TO 800 PM FRI 0.2" (80%) to 0.6" (40%) to 1.8" (20%) ISSUED Douglas Current TO 800 PM FRI 0.2" (80%) to 0.6" (40%) to 1.8" (20%) ISSUED Jefferson Current TO 800 PM FRI 0.2" (80%) to 0.6" (40%) to 1.8" (20%) ISSUED MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789    F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]