Flash Flood Prediction Program

Time: 832 PM Mon August 15, 2022 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGES FOR THE DISTRICT WILL BE ALLOWED TO EXPIRE AT 8:30 PM - Message 1's and Message 2's will be allowed to expire at 8:30pm as the threat for heavy rainfall has come to an end. The National Weather Service in Boulder has cancelled the Flood Watch for the foothills and Palmer Divide area at this time. Message 1's will no longer be needed at this time as well. - A few lingering light to brief moderate rain showers persist over portions of the District and will likely continue through midnight before skies gradually start to clear. Typical showers will produce a trace to 0.2", with isolated higher amounts possible likely due to training of additional rain showers. Showers currently favoring areas south of I-70, however additional rain showers along the Continental Divide could move through the District bring a good chance for another round before midnight. - As skies clear through the overnight, mild conditions expected through daybreak tomorrow with low dropping into the upper 50's to low 60's on the plains with low to mid 50's along the foothills. STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers will produce a trace to 0.2" in 10-30 minutes. A moderate rain shower could produce 0.2-0.4" in 10-30 minutes. WORST CASE SCENARIO: A moderate to strong rain shower/isolated thunderstorm has the potential to produce 0.4-1.2" in 30-60 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME the City of Aurora 1 Current TO 1159 PM Current TO 1130 PM Arapahoe County 1 Current TO 1159 PM Current TO 1130 PM DIA 1 Current TO 1159 PM Current TO 1130 PM Denver County 1 Current TO 1159 PM Current TO 1130 PM Adams County 1 Current TO 1159 PM Current TO 1130 PM Douglas County 1 Current TO 1159 PM Current TO 1130 PM Broomfield County 1 Current TO 1159 PM Current TO 1130 PM Jefferson County 2 Current TO 1159 PM Current TO 1130 PM Boulder County 2 Current TO 1159 PM Current TO 1130 PM Arvada 2 Current TO 1159 PM Current TO 1130 PM Wheat Ridge 2 Current TO 1159 PM Current TO 1130 PM Lakewood 2 Current TO 1159 PM Current TO 1130 PM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 1159 PM MON Trace (50%) to 0.2" (25%) to 0.4" (5%) ISSUED Arapahoe Current TO 1159 PM MON Trace (50%) to 0.2" (25%) to 0.4" (5%) ISSUED Boulder Current TO 1159 PM MON Trace (50%) to 0.2" (25%) to 0.4" (5%) ISSUED Broomfield Current TO 1159 PM MON Trace (50%) to 0.2" (25%) to 0.4" (5%) ISSUED Denver Current TO 1159 PM MON Trace (50%) to 0.2" (25%) to 0.4" (5%) ISSUED Douglas Current TO 1159 PM MON Trace (60%) to 0.2" (30%) to 0.4" (10%) ISSUED Jefferson Current TO 1159 PM MON Trace (60%) to 0.2" (30%) to 0.4" (10%) ISSUED Foothills above 6500ft       Boulder Current TO 1159 PM MON Trace (60%) to 0.2" (30%) to 0.4" (10%) ISSUED Douglas Current TO 1159 PM MON Trace (60%) to 0.2" (30%) to 0.4" (10%) ISSUED Jefferson Current TO 1159 PM MON Trace (60%) to 0.2" (30%) to 0.4" (10%) 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]