Time: 849 PM Sun August 6, 2023 Forecaster: Justin Brooks

Internal Message Status
Flash Flood Prediction Program

MESSAGE 1’S WILL BE ALLOWED TO EXPIRE AT 9:00 PM
Message 1’s will be allowed to expire at 9pm as the threat of heavy rain has come to an end.

Stronger storms that impacted the District this afternoon have moved well east at this time. A few showers/isolated thunderstorms persist, which will keep a continued chance for showers through midnight. Storm motions continue to be brisk from west to east, between 20-30mph which will also limit point rainfall amounts.

Skies will gradually clear through the rest of the overnight with clear skies likely by daybreak tomorrow. Mild and dry conditions expected through the overnight as low temperatures drop into the mid to upper 50’s on the plains with low 50’s along the foothills.
STORM RAINFALL POTENTIAL AND DURATION: Typical showers will produce a trace to 0.20” total in 10-30 minutes. A weak to moderate thunderstorm will produce 0.20-0.40” total in 10-30 minutes.

WORST CASE SCENARIO: A strong thunderstorm, or training of showers/thunderstorm cells has the potential to produce up to 0.8” in under 60 minutes.

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

County-specific Quantitative
Precipitation Outlook
Precipitation Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 900 PM SUN
Trace (30%) to 0.2" (15%) to 0.4" (5%) NONE
Arapahoe Current TO 900 PM SUN
Trace (50%) to 0.2" (25%) to 0.4" (10%) NONE
Boulder Current TO 900 PM SUN
Trace (30%) to 0.2" (15%) to 0.4" (5%) NONE
Broomfield Current TO 900 PM SUN
Trace (30%) to 0.2" (15%) to 0.4" (5%) NONE
Denver Current TO 900 PM SUN
Trace (50%) to 0.2" (25%) to 0.4" (10%) NONE
Douglas Current TO 900 PM SUN
Trace (50%) to 0.2" (25%) to 0.4" (10%) NONE
Jefferson Current TO 900 PM SUN
Trace (50%) to 0.2" (25%) to 0.4" (10%) NONE
Foothills above 6500ft      
Boulder Current TO 900 PM SUN
Trace (50%) to 0.2" (25%) to 0.4" (10%) NONE
Douglas Current TO 900 PM SUN
Trace (50%) to 0.2" (25%) to 0.4" (10%) NONE
Jefferson Current TO 900 PM SUN
Trace (50%) to 0.2" (25%) to 0.4" (10%) NONE
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
https://f2p2.udfcd.org/generator/