Time: 830 PM Sat July 27, 2024 Forecaster: Aaron O'Brien ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1’S WILL BE ALLOWED TO EXPIRE AT 9:00 PM Message 1’s will be allowed to expire at 9pm as the threat of heavy rainfall has come to an end. After a round of showers and thunderstorms early in the afternoon, only a few very isolated showers persist west of the District. These showers/thunderstorms should weaken and dissipate over the next several hours creating minimal concern over point rainfall amounts. Mild and dry conditions are expected overnight and into daybreak tomorrow. Temperatures will drop into the mid to upper 50s for the plains with low 50s along the foothills. Tomorrow looks to be much drier with limited convection for the District, with Message chances looking very unlikely. STORM RAINFALL POTENTIAL AND DURATION: A weak shower would produce between a trace and 0.10” total in 10-30 minutes. WORST CASE SCENARIO: A stronger shower/thunderstorm develops will have the potential to produce 0.10”-0.25” total 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 1159 PM SAT Trace (30%) to 0.1" (20%) to 0.25" (10%) NONE Arapahoe Current TO 1159 PM SAT Trace (30%) to 0.1" (20%) to 0.25" (10%) NONE Boulder Current TO 1159 PM SAT Trace (30%) to 0.1" (20%) to 0.25" (10%) NONE Broomfield Current TO 1159 PM SAT Trace (30%) to 0.1" (20%) to 0.25" (10%) NONE Denver Current TO 1159 PM SAT Trace (30%) to 0.1" (20%) to 0.25" (10%) NONE Douglas Current TO 1159 PM SAT Trace (30%) to 0.1" (20%) to 0.25" (10%) NONE Jefferson Current TO 1159 PM SAT Trace (30%) to 0.1" (20%) to 0.25" (10%) NONE Foothills above 6500ft       Boulder Current TO 1159 PM SAT Trace (30%) to 0.1" (20%) to 0.25" (10%) NONE Douglas Current TO 1159 PM SAT Trace (30%) to 0.1" (20%) to 0.25" (10%) NONE Jefferson Current TO 1159 PM SAT Trace (30%) to 0.1" (20%) to 0.25" (10%) 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]