Time: 723 PM Fri September 3, 2021 Forecaster: Justin Brooks

Internal Message Status
Flash Flood Prediction Program

MESSAGE 1'S WILL BE ALLOWED TO EXPIRE AT 8:00 PM
-Message 1's will be allowed to expire at 8pm as the threat for heavy rainfall has come to an end.
-Most areas will remain dry through the rest of the evening, however, a few widely scattered light to brief moderate isolated rain showers cannot be completely ruled out over the next few hours. These rain showers will favor northeastern and southeastern portions of the District as the tail end of the disturbance exits the region through the evening.
-By 10pm skies will gradually clear with a mild overnight as lows drop into the mid to upper 50's for the plains with low 50's along the foothills.
STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers will produce a trace to 0.1" in 10-30 minutes. A brief moderate rain showers could produce 0.1-0.3" in 10-30 minutes.

WORST CASE SCENARIO: A thunderstorm has the potential to produce 0.3-0.8" in under 60 minutes.

County Message Valid Times Prime Time
Denver County 1 Current TO 800 PM Current TO 800 PM
Adams County 1 Current TO 800 PM Current TO 800 PM
Douglas County 1 Current TO 800 PM Current TO 800 PM
Broomfield County 1 Current TO 800 PM Current TO 800 PM
Jefferson County 1 Current TO 800 PM Current TO 800 PM
Boulder County 1 Current TO 800 PM Current TO 800 PM
Lakewood 1 Current TO 800 PM Current TO 800 PM
Wheat Ridge 1 Current TO 800 PM Current TO 800 PM
Arvada 1 Current TO 800 PM Current TO 800 PM
the City of Aurora 1 Current TO 800 PM Current TO 800 PM
Arapahoe County 1 Current TO 800 PM Current TO 800 PM
DIA 1 Current TO 800 PM Current TO 800 PM

County-specific Quantitative
Precipitation Outlook
Precipitation Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 1000 PM FRI
Trace (20%) to 0.1" (15%) to 0.3" (5%) ISSUED
Arapahoe Current TO 1000 PM FRI
Trace (20%) to 0.1" (15%) to 0.3" (5%) ISSUED
Boulder Current TO 1000 PM FRI
Trace (20%) to 0.1" (15%) to 0.3" (5%) ISSUED
Broomfield Current TO 1000 PM FRI
Trace (20%) to 0.1" (15%) to 0.3" (5%) ISSUED
Denver Current TO 1000 PM FRI
Trace (20%) to 0.1" (15%) to 0.3" (5%) ISSUED
Douglas Current TO 1000 PM FRI
Trace (20%) to 0.1" (15%) to 0.3" (5%) ISSUED
Jefferson Current TO 1000 PM FRI
Trace (20%) to 0.1" (15%) to 0.3" (5%) ISSUED
Foothills above 6500ft      
Boulder Current TO 1000 PM FRI
Trace (30%) to 0.1" (15%) to 0.3" (5%) ISSUED
Douglas Current TO 1000 PM FRI
Trace (30%) to 0.1" (15%) to 0.3" (5%) ISSUED
Jefferson Current TO 1000 PM FRI
Trace (30%) to 0.1" (15%) to 0.3" (5%) ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
https://f2p2.udfcd.org/generator/