Time: 1102 PM Tue July 4, 2023 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1'S HAVE BEEN EXTENDED FOR THE DISTRICT UNTIL 2AM Message 1’s have been extended until 2am as the threat for heavy rain continues. Multiple rounds of showers and thunderstorms continue to impact the District at this time. These showers and thunderstorms will continue over the next few hours with a heavy rainfall threat. Storms currently produce a quick 0.5-1.25” in 10-30 minutes. This type of rainfall will continue through midnight and should start to decrease by 2am. Additional storms possible through daybreak, however the heavy rain should be less a threat after 2am. Overnight off and on rain showers possible as lows drop into the low to mid 50’s. STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers/thunderstorms will produce 0.25-0.50” total, in 10-30 minutes. A moderate to strong thunderstorm will result in 0.50-1.25” total, in 10-30 minutes. WORST CASE SCENARIO: A strong, stationary thunderstorm has the potential to produce up to 2.0 in 45-60 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Boulder County 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY Jefferson County 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY Broomfield County 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY Douglas County 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY Adams County 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY Denver County 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY DIA 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY Arapahoe County 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY the City of Aurora 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY Arvada 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY Wheat Ridge 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY Lakewood 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 200 AM WED 0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED Arapahoe Current TO 200 AM WED 0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED Boulder Current TO 200 AM WED 0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED Broomfield Current TO 200 AM WED 0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED Denver Current TO 200 AM WED 0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED Douglas Current TO 200 AM WED 0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED Jefferson Current TO 200 AM WED 0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED Foothills above 6500ft       Boulder Current TO 200 AM WED 0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED Douglas Current TO 200 AM WED 0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED Jefferson Current TO 200 AM WED 0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789    F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]