Time: 840 PM Thu June 24, 2021 Forecaster: Brad Simmons ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1'S WILL BE ALLOWED TO EXPIRE AT 9PM, ADDITIONAL RAIN SHOWERS REMAIN LIKELY INTO THE EVENING - Message 1's will be allowed to expire at 9pm as the threat for heavy rainfall has ended for the day. Isolated to widely scattered light rain showers remain possible until about midnight. - With temperatures currently in the 60's to around 70 any precipitation should fall as light rain showers this evening but a very isolated weak thunderstorm cannot be completely ruled out. Beyond midnight generally dry conditions are expected until early Friday morning then there could be a brief round of showers either side of daybreak. - Friday afternoon will feature scattered thunderstorms with the potential to produce moderate and heavy rainfall over the District. Thunderstorm chances continue over the upcoming weekend potentially stringing together a stretch of Message days... STORM RAINFALL POTENTIAL AND DURATION: Isolated to widely scattered rain showers will produce a trace to 0.1" of rain. A very isolated weak thunderstorms may produce up to 0.2" of rain in 10-30 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Boulder County 1 Current TO 900 PM Current TO 900 PM Jefferson County 1 Current TO 900 PM Current TO 900 PM Broomfield County 1 Current TO 900 PM Current TO 900 PM Douglas County 1 Current TO 900 PM Current TO 900 PM Adams County 1 Current TO 900 PM Current TO 900 PM Denver County 1 Current TO 900 PM Current TO 900 PM DIA 1 Current TO 900 PM Current TO 900 PM Arapahoe County 1 Current TO 900 PM Current TO 900 PM the City of Aurora 1 Current TO 900 PM Current TO 900 PM Arvada 1 Current TO 900 PM Current TO 900 PM Wheat Ridge 1 Current TO 900 PM Current TO 900 PM Lakewood 1 Current TO 900 PM Current TO 900 PM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 800 AM FRI Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Arapahoe Current TO 800 AM FRI Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Boulder Current TO 800 AM FRI Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Broomfield Current TO 800 AM FRI Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Denver Current TO 800 AM FRI Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Douglas Current TO 800 AM FRI Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Jefferson Current TO 800 AM FRI Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Foothills above 6500ft       Boulder Current TO 800 AM FRI Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Douglas Current TO 800 AM FRI Trace (75%) to 0.1" (50%) to 0.2" (25%) NONE Jefferson Current TO 800 AM FRI 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]