Time: 946 PM Wed July 5, 2023 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1’S WILL BE ALLOWED TO EXPIRE AT 10:00 PM Message 1’s will be allowed to expire at 10:00 pm as the threat of heavy rain has come to an end. A few showers and a weak thunderstorm or two will be possible over the next few hours as the tail end of today’s disturbance continues eastward. Storms will favor northern portions of the District through midnight. Quick storm motions from west to east, between 20-30 mph will limit any point rainfall amounts. After midnight, storm chances taper off with a few off and on showers possible through daybreak tomorrow. Overnight lows will remain in the mid to upper 50’s across most of the District. Temperatures should warm a bit more tomorrow with a better chance of some sunshine during the morning. Warmer daytime temperatures tomorrow will increase storm potential into the afternoon and early evening hours. STORM RAINFALL POTENTIAL AND DURATION: Typical showers will produce a trace to 0.20” total, in 10-30 minutes. A weak thunderstorm could produce 0.20-0.40” total, in 10-30 minutes. WORST CASE SCENARIO: A moderate to strong thunderstorm has the potential to produce up to 0.80” total, in 45-60 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Boulder County 1 Current TO 1000 PM Current TO 1000 PM Jefferson County 1 Current TO 1000 PM Current TO 1000 PM Broomfield County 1 Current TO 1000 PM Current TO 1000 PM Douglas County 1 Current TO 1000 PM Current TO 1000 PM Adams County 1 Current TO 1000 PM Current TO 1000 PM Denver County 1 Current TO 1000 PM Current TO 1000 PM DIA 1 Current TO 1000 PM Current TO 1000 PM Arapahoe County 1 Current TO 1000 PM Current TO 1000 PM the City of Aurora 1 Current TO 1000 PM Current TO 1000 PM Arvada 1 Current TO 1000 PM Current TO 1000 PM Wheat Ridge 1 Current TO 1000 PM Current TO 1000 PM Lakewood 1 Current TO 1000 PM Current TO 1000 PM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 600 AM THU Trace (75%) to 0.2" (40%) to 0.4" (20%) NONE Arapahoe Current TO 600 AM THU Trace (60%) to 0.2" (30%) to 0.4" (15%) NONE Boulder Current TO 600 AM THU Trace (75%) to 0.2" (40%) to 0.4" (20%) NONE Broomfield Current TO 600 AM THU Trace (75%) to 0.2" (40%) to 0.4" (20%) NONE Denver Current TO 600 AM THU Trace (70%) to 0.2" (35%) to 0.4" (15%) NONE Douglas Current TO 600 AM THU Trace (60%) to 0.2" (30%) to 0.4" (15%) NONE Jefferson Current TO 600 AM THU Trace (70%) to 0.2" (35%) to 0.4" (15%) NONE Foothills above 6500ft       Boulder Current TO 600 AM THU Trace (75%) to 0.2" (50%) to 0.4" (20%) NONE Douglas Current TO 600 AM THU Trace (60%) to 0.2" (30%) to 0.4" (15%) NONE Jefferson Current TO 600 AM THU Trace (70%) to 0.2" (40%) to 0.4" (15%) 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]