Flash Flood Prediction Program

Time: 1003 PM Fri June 16, 2023 Forecaster: Brad Simmons ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 2'S HAVE BEEN ALLOWED TO EXPIRE AT 10:00 PM Message 2’s (NWS Flood/Flash Flood Watch) has been allowed to expire at 10:00 PM as the rainfall is coming to an end. A few lingering light rain showers will remain possible through about 2am then dry conditions are expected for the remainder of the overnight period into Saturday morning. Additional rainfall is expected to be minor, less than 0.2” most locations. Areas of fog may develop overnight and persist into daybreak on Saturday over the plains. Abundant surface moisture and daytime heating will result in afternoon thunderstorms on Saturday, some of which may contain heavy rainfall. The ground is saturated and creeks/streams are already running high in and around the District resulting in any heavy rainfall tomorrow quickly producing excessive runoff. 1-2 rounds of storms are likely tomorrow between Noon-7pm. STORM RAINFALL POTENTIAL AND DURATION: Additional light rain showers will produce a trace to 0.2” in 30-60 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 60-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 200 AM SAT Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Arapahoe Current TO 200 AM SAT Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Boulder Current TO 200 AM SAT Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Broomfield Current TO 200 AM SAT Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Denver Current TO 200 AM SAT Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Douglas Current TO 200 AM SAT Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Jefferson Current TO 200 AM SAT Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Foothills above 6500ft       Boulder Current TO 200 AM SAT Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Douglas Current TO 200 AM SAT Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Jefferson Current TO 200 AM SAT Trace (75%) to 0.1" (50%) to 0.2" (25%) 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]