Time: 723 PM Mon July 24, 2023 Forecaster: Brad Simmons ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1 HAS BEEN ISSUED FOR DOUGLAS COUNTY Message 1 has been issued for Douglas County and is valid until 9:00 PM. A slower moving strong thunderstorm has developed over Douglas County and may produce brief heavy rainfall as it tracks over northern areas of the County. This storm is moving to the E at around 10-15mph and may result in excessive runoff roadways. This storm will also contain gusty winds in excess of 50mph and possibly hail. This storm should exit the County ahead of 8:30 PM. STORM RAINFALL POTENTIAL AND DURATION: Moderate to strong thunderstorms will have the potential to produce 0.3-0.8" in 10-30 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Douglas County 1 Current TO 900 PM Current TO 830 PM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 900 PM MON 0.1" (60%) to 0.3" (20%) to 0.8" (10%) LOW Arapahoe Current TO 900 PM MON 0.1" (60%) to 0.3" (20%) to 0.8" (10%) LOW Boulder Current TO 900 PM MON 0.1" (25%) to 0.3" (10%) to 0.8" (5%) NONE Broomfield Current TO 900 PM MON 0.1" (25%) to 0.3" (10%) to 0.8" (5%) NONE Denver Current TO 900 PM MON 0.1" (25%) to 0.3" (10%) to 0.8" (5%) NONE Douglas Current TO 900 PM MON 0.1" (90%) to 0.3" (60%) to 0.8" (30%) ISSUED Jefferson Current TO 900 PM MON 0.1" (25%) to 0.3" (10%) to 0.8" (5%) NONE Foothills above 6500ft       Boulder Current TO 900 PM MON 0.1" (25%) to 0.3" (10%) to 0.8" (5%) NONE Douglas Current TO 900 PM MON 0.1" (80%) to 0.3" (40%) to 0.8" (20%) ISSUED Jefferson Current TO 900 PM MON 0.1" (25%) to 0.3" (10%) to 0.8" (5%) 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]