Time: 234 PM Sat July 16, 2022 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1'S ISSUED FOR THE ENTIRE DISTRICT VALID UNTIL 9:00 PM - Message 1's have been issued and will be valid until 9:00pm this evening. - A few weak rain showers/isolated thunderstorms have impacted the District and will continue to move eastward at this time. A stronger line of storms to the W/NW is currently moving towards the District and will have the best chance at producing moderate to heavy rainfall as it moves through the District. Slow moving or stationary thunderstorm that develop along any gust fronts may move very slowly or remain stationary having the potential for heavy rainfall. Strong thunderstorms may also contain gusty winds, hail and frequent cloud-to-ground lightning. - Prime time for storms in the District will be between 3-8pm with one or two rounds of thunderstorms possible. Upper-level winds should carry most storms from W to E between 10-15mph, however, gust fronts could anchor storms or cause erratic motions at times. STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak thunderstorms will produce 0.1-0.4" in 10-30 minutes. Moderate to strong thunderstorms will have the potential to produce rainfall rates of 0.4-1.0" in 10-30 minutes. WORST CASE SCENARIO: A nearly stationary strong thunderstorm may result in up to 1.8" of rain in 60-90 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME the City of Aurora 1 Current TO 900 PM Current TO 800 PM Arapahoe County 1 Current TO 900 PM Current TO 800 PM DIA 1 Current TO 900 PM Current TO 800 PM Denver County 1 Current TO 900 PM Current TO 800 PM Adams County 1 Current TO 900 PM Current TO 800 PM Douglas County 1 Current TO 900 PM Current TO 800 PM Broomfield County 1 Current TO 900 PM Current TO 800 PM Jefferson County 1 Current TO 900 PM Current TO 800 PM Boulder County 1 Current TO 900 PM Current TO 800 PM Arvada 1 Current TO 900 PM Current TO 800 PM Wheat Ridge 1 Current TO 900 PM Current TO 800 PM Lakewood 1 Current TO 900 PM Current TO 800 PM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 900 PM SAT 0.1" (75%) to 0.4" (50%) to 1.0" (15%) ISSUED Arapahoe Current TO 900 PM SAT 0.1" (75%) to 0.4" (50%) to 1.0" (15%) ISSUED Boulder Current TO 900 PM SAT 0.1" (75%) to 0.4" (50%) to 1.0" (15%) ISSUED Broomfield Current TO 900 PM SAT 0.1" (75%) to 0.4" (50%) to 1.0" (15%) ISSUED Denver Current TO 900 PM SAT 0.1" (75%) to 0.4" (50%) to 1.0" (15%) ISSUED Douglas Current TO 900 PM SAT 0.1" (75%) to 0.4" (50%) to 1.0" (15%) ISSUED Jefferson Current TO 900 PM SAT 0.1" (75%) to 0.4" (50%) to 1.0" (15%) ISSUED Foothills above 6500ft       Boulder Current TO 900 PM SAT 0.1" (90%) to 0.4" (60%) to 1.0" (20%) ISSUED Douglas Current TO 900 PM SAT 0.1" (90%) to 0.4" (60%) to 1.0" (20%) ISSUED Jefferson Current TO 900 PM SAT 0.1" (90%) to 0.4" (60%) to 1.0" (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]