Time: 335 PM Mon July 15, 2024 Forecaster: Justin Brooks

Internal Message Status
Flash Flood Prediction Program

MESSAGES 1’S HAVE BEEN ISSUED EFFECTIVE UNTIL10:00 PM
Storms have initiated over the District this afternoon and will continue into the evening hours. A few moderate to heavy showers have already impacted northern portions of the District with additional storms likely for most areas as storms have increased in coverage over the last 20-30 minutes.

Initial storm motions were from the west to east around 10mph, however, stronger storms have resulted in several anchored storms which have produced at least 0.30 in around 10 minutes. The biggest threat will be this afternoon and early evening will be a quick 0.50-0.75” in 10-30 minutes. Storms will continue to impact the region over the next several hours with lingering showers possible into the late evening. Storms also contain some hail and frequent cloud-to-ground lightning.

Once the initial round of storms moves through the District, storms will dissipate in strength into the later evening with a few scattered showers possible. Skies will gradually clear overnight with temperatures dropping into the mid to upper 50s.
STORM RAINFALL POTENTIAL AND DURATION: Typical showers and thunderstorms will produce 0.05-0.30” total in 10-30 minutes. A moderate to strong shower/thunderstorm will produce 0.30-0.80” total in 10-30 minutes.

WORST CASE SCENARIO: A strong stationary thunderstorm or training of thunderstorm cells will have the potential to produce up to 1.25” total in 30-60 minutes.

County Message Valid Times Prime Time
Broomfield County 1 Current TO 1000 PM Current TO 930 PM
Boulder County 1 Current TO 1000 PM Current TO 930 PM
Jefferson County 1 Current TO 1000 PM Current TO 930 PM
Adams County 1 Current TO 1000 PM Current TO 930 PM
Douglas County 1 Current TO 1000 PM Current TO 930 PM
the City of Aurora 1 Current TO 1000 PM Current TO 930 PM
Arapahoe County 1 Current TO 1000 PM Current TO 930 PM
DIA 1 Current TO 1000 PM Current TO 930 PM
Denver County 1 Current TO 1000 PM Current TO 930 PM
Lakewood 1 Current TO 1000 PM Current TO 930 PM
Arvada 1 Current TO 1000 PM Current TO 930 PM
Wheat Ridge 1 Current TO 1000 PM Current TO 930 PM

County-specific Quantitative
Precipitation Outlook
Precipitation Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 1000 PM MON
0.05" (60%) to 0.3" (30%) to 0.8" (15%) ISSUED
Arapahoe Current TO 1000 PM MON
0.05" (60%) to 0.3" (30%) to 0.8" (15%) ISSUED
Boulder Current TO 1000 PM MON
0.05" (60%) to 0.3" (30%) to 0.8" (15%) ISSUED
Broomfield Current TO 1000 PM MON
0.05" (60%) to 0.3" (30%) to 0.8" (15%) ISSUED
Denver Current TO 1000 PM MON
0.05" (60%) to 0.3" (30%) to 0.8" (15%) ISSUED
Douglas Current TO 1000 PM MON
0.05" (60%) to 0.3" (30%) to 0.8" (15%) ISSUED
Jefferson Current TO 1000 PM MON
0.05" (60%) to 0.3" (30%) to 0.8" (15%) ISSUED
Foothills above 6500ft      
Boulder Current TO 1000 PM MON
0.05" (80%) to 0.3" (40%) to 0.8" (20%) ISSUED
Douglas Current TO 1000 PM MON
0.05" (80%) to 0.3" (40%) to 0.8" (20%) ISSUED
Jefferson Current TO 1000 PM MON
0.05" (80%) to 0.3" (40%) to 0.8" (20%) ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
https://f2p2.udfcd.org/generator/