Flash Flood Prediction Program

Time: 815 PM Thu June 1, 2023 Forecaster: Brad Simmons ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1'S WILL BE ALLOWED TO EXPIRE AT 9:00 PM/ADDITIONAL RAIN SHOWERS LIKELY OVERNIGHT Message 1’s will be allowed to expire at 9:00pm as the threat of heavy rainfall has ended for the day. Additional rain showers and possibly a weak thunderstorm over the foothills will continue possible into the overnight period as an upper level low pressure system churns near the 4-Corners. Thunderstorms are not expected as temperatures are cooling and the atmosphere is becoming more stable. Chances for rain showers will persist past midnight with dry conditions expected by daybreak tomorrow. More showers and thunderstorms are expected to develop on Friday with stronger storms having the potential to produce brief heavy rain and hail. Active weather pattern will continue over the upcoming weekend into early next week with below normal temperatures. STORM RAINFALL POTENTIAL AND DURATION: Rain showers and possibly a weak thunderstorm will produce a trace to 0.3” of rain. COUNTY MESSAGE VALID TIMES PRIME TIME Adams County 1 1200 PM TO 900 PM 100 PM TO 830 PM Denver County 1 1200 PM TO 900 PM 100 PM TO 830 PM DIA 1 1200 PM TO 900 PM 100 PM TO 830 PM Arapahoe County 1 1200 PM TO 900 PM 100 PM TO 830 PM the City of Aurora 1 1200 PM TO 900 PM 100 PM TO 830 PM Arvada 1 1200 PM TO 900 PM 100 PM TO 830 PM Wheat Ridge 1 1200 PM TO 900 PM 100 PM TO 830 PM Broomfield County 1 1200 PM TO 900 PM 100 PM TO 830 PM Lakewood 1 1200 PM TO 900 PM 100 PM TO 830 PM Douglas County 1 1200 PM TO 900 PM 100 PM TO 830 PM Jefferson County 1 1200 PM TO 900 PM 100 PM TO 830 PM Boulder County 1 1200 PM TO 900 PM 100 PM TO 830 PM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 400 AM FRI Trace (80%) to 0.1" (40%) to 0.3" (15%) ISSUED Arapahoe Current TO 400 AM FRI Trace (80%) to 0.1" (40%) to 0.3" (15%) ISSUED Boulder Current TO 400 AM FRI Trace (80%) to 0.1" (40%) to 0.3" (15%) ISSUED Broomfield Current TO 400 AM FRI Trace (80%) to 0.1" (40%) to 0.3" (15%) ISSUED Denver Current TO 400 AM FRI Trace (80%) to 0.1" (40%) to 0.3" (15%) ISSUED Douglas Current TO 400 AM FRI Trace (90%) to 0.1" (50%) to 0.3" (15%) ISSUED Jefferson Current TO 400 AM FRI Trace (80%) to 0.1" (40%) to 0.3" (15%) ISSUED Foothills above 6500ft       Boulder Current TO 400 AM FRI Trace (80%) to 0.1" (40%) to 0.3" (15%) ISSUED Douglas Current TO 400 AM FRI Trace (90%) to 0.1" (60%) to 0.3" (20%) ISSUED Jefferson Current TO 400 AM FRI Trace (80%) to 0.1" (40%) to 0.3" (15%) 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]