Time: 728 AM Fri May 12, 2023 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- UPDATE FOR FLOOD WARNING BIG DRY CREEK & FLOWS INTO CHERRY CREEK RESEVOIR Message 2's issued will continue valid through noon today. The National Weather Service has updated the Big Dry Creek area to a Flood Warning due to excessive runoff leading to localized flooding. The area of impact will be from Thornton, Westminster and downstream to the confluence with the South Platte River near Fort Lupton. This Flood Warning will be in effect through 3pm this afternoon. The National Weather Service has also upgraded the flows into Cherry Creek Reservoir to a Flood Warning as elevated water flows currently moving from the Douglas County area through Arapahoe County and into Cherry Creek. These elevated flows will likely have localized flooding, especially along any paths adjacent to creeks/rivers. This Flood Warning is also in effect through 3pm this afternoon. The MHFD will advise through an IMS any additional Flood Warnings for this event if necessary. STORM RAINFALL POTENTIAL AND DURATION: Light rain showers will produce rainfall rates of 0.1-0.3" in 60 minutes. Moderate to heavy non-thunderstorm rain showers will produce rainfall rates of 0.2-0.6" in 60 minutes. WORST CASE SCENARIO: Training of moderate rain rain showers or a weak to moderate thunderstorm has the potential to produce rainfall amounts of 0.5-1.5" in 30-60 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Lakewood 2 Current TO 1159 AM Current TO 1000 AM Wheat Ridge 2 Current TO 1159 AM Current TO 1000 AM Arvada 2 Current TO 1159 AM Current TO 1000 AM the City of Aurora 2 Current TO 1159 AM Current TO 1000 AM Arapahoe County 2 Current TO 1159 AM Current TO 1000 AM DIA 2 Current TO 1159 AM Current TO 1000 AM Denver County 2 Current TO 1159 AM Current TO 1000 AM Adams County 2 Current TO 1159 AM Current TO 1000 AM Douglas County 2 Current TO 1159 AM Current TO 1000 AM Broomfield County 2 Current TO 1159 AM Current TO 1000 AM Jefferson County 2 Current TO 1159 AM Current TO 1000 AM Boulder County 2 Current TO 1159 AM Current TO 1000 AM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 60-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 1159 AM FRI 0.1" (90%) to 0.3" (45%) to 0.8" (20%) ISSUED Arapahoe Current TO 1159 AM FRI 0.1" (90%) to 0.3" (45%) to 0.8" (20%) ISSUED Boulder Current TO 1159 AM FRI 0.1" (90%) to 0.3" (45%) to 0.8" (20%) ISSUED Broomfield Current TO 1159 AM FRI 0.1" (90%) to 0.3" (45%) to 0.8" (20%) ISSUED Denver Current TO 1159 AM FRI 0.1" (90%) to 0.3" (45%) to 0.8" (20%) ISSUED Douglas Current TO 1159 AM FRI 0.1" (90%) to 0.3" (45%) to 0.8" (20%) ISSUED Jefferson Current TO 1159 AM FRI 0.1" (90%) to 0.3" (45%) to 0.8" (20%) ISSUED Foothills above 6500ft       Boulder Current TO 1159 AM FRI 0.1" (80%) to 0.3" (40%) to 0.8" (10%) ISSUED Douglas Current TO 1159 AM FRI 0.1" (80%) to 0.3" (40%) to 0.8" (10%) ISSUED Jefferson Current TO 1159 AM FRI 0.1" (80%) to 0.3" (40%) to 0.8" (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]