Time: 857 PM Mon August 12, 2024 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 2’S & MESSAGE 1’S WILL BE ALLOWED TO EXPIRE AT 9:00 PM Message 2s and Message 1s will be allowed to expire at 9pm as the threat of heavy rain has come to an end. A few strong storms clipped southern and eastern portions of the District resulting in some isolated heavy rainfall this afternoon. Storms have since moved onto the eastward plains. A few additional showers could develop over portions of the District late this evening. Movement speeds have increased this evening and convection should remain minimal due to the loss of diurnal heating. Skies will clear out overnight with temperatures dropping into the upper 50s to low 60s by daybreak tomorrow. Another chance for moderate to heavy rain tomorrow, once again favoring areas east of I-25. Tomorrow could potentially bring a couple of rounds of storms, with a slight chance storms will become severe, including gusty winds and large hail. STORM RAINFALL POTENTIAL AND DURATION: A shower will produce a trace to 0.10” total in 10-30 minutes. WORST CASE SCENARIO: A weak thunderstorm will have the potential to produce 0.10”-0.30” total in 10-30 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Lakewood 1 Current TO 900 PM Current TO 900 PM Wheat Ridge 1 Current TO 900 PM Current TO 900 PM Arvada 1 Current TO 900 PM Current TO 900 PM the City of Aurora 2 Current TO 900 PM Current TO 900 PM Arapahoe County 2 Current TO 900 PM Current TO 900 PM DIA 2 Current TO 900 PM Current TO 900 PM Denver County 2 Current TO 900 PM Current TO 900 PM Adams County 2 Current TO 900 PM Current TO 900 PM Douglas County 2 Current TO 900 PM Current TO 900 PM Broomfield County 2 Current TO 900 PM Current TO 900 PM Jefferson County 2 Current TO 900 PM Current TO 900 PM Boulder County 2 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 900 PM MON Trace (15%) to 0.1" (10%) to 0.3" (5%) ISSUED Arapahoe Current TO 900 PM MON Trace (15%) to 0.1" (10%) to 0.3" (5%) ISSUED Boulder Current TO 900 PM MON Trace (15%) to 0.1" (10%) to 0.3" (5%) ISSUED Broomfield Current TO 900 PM MON Trace (15%) to 0.1" (10%) to 0.3" (5%) ISSUED Denver Current TO 900 PM MON Trace (15%) to 0.1" (10%) to 0.3" (5%) ISSUED Douglas Current TO 900 PM MON Trace (15%) to 0.1" (10%) to 0.3" (5%) ISSUED Jefferson Current TO 900 PM MON Trace (15%) to 0.1" (10%) to 0.3" (5%) ISSUED Foothills above 6500ft       Boulder Current TO 900 PM MON Trace (15%) to 0.1" (10%) to 0.3" (5%) ISSUED Douglas Current TO 900 PM MON Trace (15%) to 0.1" (10%) to 0.3" (5%) ISSUED Jefferson Current TO 900 PM MON Trace (15%) to 0.1" (10%) to 0.3" (5%) 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]