Flash Flood Prediction Program

Time: 159 AM Mon June 12, 2023 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 2'S WILL BE ALLOWED TO EXPIRE AT 3:00 AM Message 2’s will be allowed to expire at 3am as the threat of heavy rainfall has come to an end. A few lingering rain showers will be possible over the next few hours before showers gradually clear before daybreak. Temperatures have dropped into the low to mid 50’s on the plains and will only decrease a few degrees before sunrise. Similar conditions remain in place tomorrow with another good chance for heavy rainfall along the I-25 corridor with a slight chance for severe weather, favoring areas along and east of I-25 at this time. STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers will produce a trace to 0.1” total, in 10-30 minutes. A Moderate rain showers will produce 0.1-0.3” total, in 10-30 minutes. WORST CASE SCENARIO: A thunderstorm, or training or rain showers has the potential to produce 0.3-0.8” total, in up to 60 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Adams County 2 Current TO 300 AM Current TO 200 AM Douglas County 2 Current TO 300 AM Current TO 200 AM Broomfield County 2 Current TO 300 AM Current TO 200 AM Jefferson County 2 Current TO 300 AM Current TO 200 AM Boulder County 2 Current TO 300 AM Current TO 200 AM Denver County 2 Current TO 300 AM Current TO 200 AM DIA 2 Current TO 300 AM Current TO 200 AM Arapahoe County 2 Current TO 300 AM Current TO 200 AM the City of Aurora 2 Current TO 300 AM Current TO 200 AM Arvada 2 Current TO 300 AM Current TO 200 AM Wheat Ridge 2 Current TO 300 AM Current TO 200 AM Lakewood 2 Current TO 300 AM Current TO 200 AM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 600 AM MON Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Arapahoe Current TO 600 AM MON Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Boulder Current TO 600 AM MON Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Broomfield Current TO 600 AM MON Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Denver Current TO 600 AM MON Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Douglas Current TO 600 AM MON Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Jefferson Current TO 600 AM MON Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Foothills above 6500ft       Boulder Current TO 600 AM MON Trace (50%) to 0.1" (25%) to 0.3" (10%) NONE Douglas Current TO 600 AM MON Trace (50%) to 0.1" (25%) to 0.3" (10%) NONE Jefferson Current TO 600 AM MON Trace (50%) to 0.1" (25%) to 0.3" (10%) 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]