Time: 505 PM Thu August 26, 2021 Forecaster: Brad Simmons ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1'S HAVE BEEN RESCINDED/THREAT FOR HEAVY RAINFALL HAS ENDED - Message 4's (All Clear) has been issued for the entire District as the threat for heavy rainfall has ended for the day. Surface moisture has been scoured out lowering dew points and eliminating the threat for heavy rainfall. - An isolated rain shower or weak thunderstorm remains possible well into the evening as a disturbance is moving into western Colorado currently. The area of showers/thunderstorms over eastern UT/western CO currently will move through overnight and keep a chance for showers and weak thunderstorms going into the early morning hours on Friday. - Best chances for additional shower activity overnight will be between 10pm and 2am. STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak thunderstorms will produce a trace to 0.1" of rain. Moderate thunderstorms will have the potential to produce 0.1-0.3" in 10-30 minutes. WORST CASE SCENARIO: A strong thunderstorm is able to develop with the potential to produce 0.3-0.9" in 10-30 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 200 AM FRI Trace (60%) to 0.1" (30%) to 0.3" (15%) NONE Arapahoe Current TO 200 AM FRI Trace (60%) to 0.1" (30%) to 0.3" (15%) NONE Boulder Current TO 200 AM FRI Trace (60%) to 0.1" (30%) to 0.3" (15%) NONE Broomfield Current TO 200 AM FRI Trace (60%) to 0.1" (30%) to 0.3" (15%) NONE Denver Current TO 200 AM FRI Trace (60%) to 0.1" (30%) to 0.3" (15%) NONE Douglas Current TO 200 AM FRI Trace (60%) to 0.1" (30%) to 0.3" (15%) NONE Jefferson Current TO 200 AM FRI Trace (60%) to 0.1" (30%) to 0.3" (15%) NONE Foothills above 6500ft       Boulder Current TO 200 AM FRI Trace (75%) to 0.1" (40%) to 0.3" (20%) NONE Douglas Current TO 200 AM FRI Trace (75%) to 0.1" (40%) to 0.3" (20%) NONE Jefferson Current TO 200 AM FRI Trace (75%) to 0.1" (40%) to 0.3" (20%) 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]