Time: 732 PM Wed September 4, 2024 Forecaster: Justin Brooks

Internal Message Status
Flash Flood Prediction Program

MESSAGES WILL CONTINUE VALID UNTIL 10:00 PM
A gust front is moving in from the north and will have the potential to trigger another round of showers and possibly a thunderstorm or two over the next few hours. Temperatures have decreased this evening in the mid 60s to around 70 degrees which should help limit storm potential. However, elevated dew points in the low 50s, combined with some upper-level support will keep the potential for a few moderate to heavy showers. The largest threat this evening will be a quick 0.5” in 10-20 minutes rather than any long-lasting rainfall. A chance remains for showers to persist into the overnight with some isolated moderate rain could be possible at times.
STORM RAINFALL POTENTIAL AND DURATION: Typical showers/thunderstorms will produce a trace-0.25” total in 10-30 minutes. A moderate to strong shower/thunderstorm will produce 0.25”-0.75” total in 10-30 minutes.

WORST CASE SCENARIO: A stationary moderate to strong thunderstorm or training of thunderstorm cells will have the potential to produce up to 1.25” in 45-60 minutes.

County Message Valid Times Prime Time
Boulder County 1 Current TO 1000 PM Current TO 900 PM
Jefferson County 1 Current TO 1000 PM Current TO 900 PM
Broomfield County 1 Current TO 1000 PM Current TO 900 PM
Douglas County 1 Current TO 1000 PM Current TO 900 PM
Adams County 1 Current TO 1000 PM Current TO 900 PM
Denver County 1 Current TO 1000 PM Current TO 900 PM
DIA 1 Current TO 1000 PM Current TO 900 PM
Arapahoe County 1 Current TO 1000 PM Current TO 900 PM
the City of Aurora 1 Current TO 1000 PM Current TO 900 PM
Arvada 1 Current TO 1000 PM Current TO 900 PM
Wheat Ridge 1 Current TO 1000 PM Current TO 900 PM
Lakewood 1 Current TO 1000 PM Current TO 900 PM

County-specific Quantitative
Precipitation Outlook
Precipitation Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 1000 PM WED
Trace (60%) to 0.25" (30%) to 0.75" (15%) ISSUED
Arapahoe Current TO 1000 PM WED
Trace (60%) to 0.25" (30%) to 0.75" (15%) ISSUED
Boulder Current TO 1000 PM WED
Trace (60%) to 0.25" (30%) to 0.75" (15%) ISSUED
Broomfield Current TO 1000 PM WED
Trace (60%) to 0.25" (30%) to 0.75" (15%) ISSUED
Denver Current TO 1000 PM WED
Trace (60%) to 0.25" (30%) to 0.75" (15%) ISSUED
Douglas Current TO 1000 PM WED
Trace (60%) to 0.25" (30%) to 0.75" (15%) ISSUED
Jefferson Current TO 1000 PM WED
Trace (60%) to 0.25" (30%) to 0.75" (15%) ISSUED
Foothills above 6500ft      
Boulder Current TO 1000 PM WED
Trace (80%) to 0.25" (40%) to 0.75" (20%) ISSUED
Douglas Current TO 1000 PM WED
Trace (80%) to 0.25" (40%) to 0.75" (20%) ISSUED
Jefferson Current TO 1000 PM WED
Trace (80%) to 0.25" (40%) to 0.75" (20%) ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
https://f2p2.udfcd.org/generator/