Time: 245 PM Wed August 7, 2024 Forecaster: Laura Smith

Internal Message Status
Flash Flood Prediction Program

Messages have been issued for the entire District
Storms have started to initiate along the foothills and are expected to start moving into the District over the next hour. Like yesterday, slow moving, gust-front driven storms are expected to propagate from west to east around 15-20 mph. However, gust fronts will likely result in additional, slower-moving thunderstorms which will have the potential for moderate to heavy rainfall.

Heavy Rainfall is most likely to occur until 9:30 PM tonight. A few lingering showers may persist later through the evening and overnight ahead of the cold front. At this time, the approaching cold front is expected to move through the District early tomorrow morning. There is still some uncertainty about the timing of the front, which will depend on how long the cool airmass stalls north of the Cheyenne Ridge. We will continue to monitor this system as it tracks south and update as needed.
STORM RAINFALL POTENTIAL AND DURATION: Thunderstorms will have the potential to produce rainfall rates of 0.30”-0.90” in 10-30 minutes.

WORST CASE SCENARIO: A slow-moving thunderstorm or a large thunderstorm complex may result in up to 1.80” of rain in 45-60 minutes.

County Message Valid Times Prime Time
Boulder County 1 Current TO 1000 PM Current TO 930 PM
Jefferson County 1 Current TO 1000 PM Current TO 930 PM
Broomfield County 1 Current TO 1000 PM Current TO 930 PM
Douglas County 1 Current TO 1000 PM Current TO 930 PM
Adams County 1 Current TO 1000 PM Current TO 930 PM
Denver County 1 Current TO 1000 PM Current TO 930 PM
DIA 1 Current TO 1000 PM Current TO 930 PM
Arapahoe County 1 Current TO 1000 PM Current TO 930 PM
the City of Aurora 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
Lakewood 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 WED
0.3" (55%) to 0.55" (35%) to 0.9" (15%) ISSUED
Arapahoe Current TO 1000 PM WED
0.3" (55%) to 0.55" (35%) to 0.9" (15%) ISSUED
Boulder Current TO 1000 PM WED
0.3" (55%) to 0.55" (35%) to 0.9" (15%) ISSUED
Broomfield Current TO 1000 PM WED
0.3" (55%) to 0.55" (35%) to 0.9" (15%) ISSUED
Denver Current TO 1000 PM WED
0.3" (55%) to 0.55" (35%) to 0.9" (15%) ISSUED
Douglas Current TO 1000 PM WED
0.3" (55%) to 0.55" (35%) to 0.9" (15%) ISSUED
Jefferson Current TO 1000 PM WED
0.3" (55%) to 0.55" (35%) to 0.9" (15%) ISSUED
Foothills above 6500ft      
Boulder Current TO 1000 PM WED
0.3" (55%) to 0.55" (35%) to 0.9" (15%) ISSUED
Douglas Current TO 1000 PM WED
0.3" (55%) to 0.55" (35%) to 0.9" (15%) ISSUED
Jefferson Current TO 1000 PM WED
0.3" (55%) to 0.55" (35%) to 0.9" (15%) ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
https://f2p2.udfcd.org/generator/