Time: 844 PM Sat August 14, 2021 Forecaster: Justin Brooks

Internal Message Status
Flash Flood Prediction Program

MESSAGE 1'S ISSUED FOR PORTIONS OF THE DISRICT
-Message 1's have been issued for all areas of the District EXCEPT Boulder, Broomfield, Adams Counties and DIA at this time with storms moving south to southeast.
-A strong thunderstorm has rapidly developed over SW Denver and is currently producing moderate to isolated heavy rainfall in areas around Lakewood and Englewood at this time. This storm is moving to the south around 10mph and will continue into far Western Arapahoe and Northern Douglas Counties over the next couple of hours.
-Best chance for moderate to heavy rainfall will be from now until 11pm with a few lingering rain showers possible through midnight.
STORM RAINFALL POTENTIAL AND DURATION: Moderate to strong thunderstorms will produce rainfall rates of 0.3-0.8" in 10-30 minutes.

WORST CASE SCENARIO: Strong stationary thunderstorms will have the potential to produce heavy rainfall of 1.6" in 45-75 minutes.

County Message Valid Times Prime Time
Arvada 1 Current TO 1100 PM Current TO 1030 PM
the City of Aurora 1 Current TO 1100 PM Current TO 1030 PM
Arapahoe County 1 Current TO 1100 PM Current TO 1030 PM
DIA 1 Current TO 1100 PM Current TO 1030 PM
Denver County 1 Current TO 1100 PM Current TO 1030 PM
Adams County 1 Current TO 1100 PM Current TO 1030 PM
Douglas County 1 Current TO 1100 PM Current TO 1030 PM
Jefferson County 1 Current TO 1100 PM Current TO 1030 PM
Broomfield County 1 Current TO 1100 PM Current TO 1030 PM
Boulder County 1 Current TO 1100 PM Current TO 1030 PM
Lakewood 1 Current TO 1100 PM Current TO 1030 PM
Wheat Ridge 1 Current TO 1100 PM Current TO 1030 PM

County-specific Quantitative
Precipitation Outlook
Precipitation Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 1100 PM SAT
Trace (20%) to 0.3" (10%) to 0.8" (5%) NONE
Arapahoe Current TO 1100 PM SAT
Trace (60%) to 0.3" (40%) to 0.8" (20%) ISSUED
Boulder Current TO 1100 PM SAT
Trace (20%) to 0.3" (10%) to 0.8" (5%) NONE
Broomfield Current TO 1100 PM SAT
Trace (20%) to 0.3" (10%) to 0.8" (5%) NONE
Denver Current TO 1100 PM SAT
Trace (50%) to 0.3" (30%) to 0.8" (10%) ISSUED
Douglas Current TO 1100 PM SAT
Trace (60%) to 0.3" (40%) to 0.8" (20%) ISSUED
Jefferson Current TO 1100 PM SAT
Trace (60%) to 0.3" (40%) to 0.8" (20%) ISSUED
Foothills above 6500ft      
Boulder Current TO 1100 PM SAT
Trace (20%) to 0.3" (10%) to 0.8" (5%) NONE
Douglas Current TO 1100 PM SAT
Trace (60%) to 0.3" (40%) to 0.8" (20%) ISSUED
Jefferson Current TO 1100 PM SAT
Trace (60%) to 0.3" (40%) to 0.8" (20%) ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
https://f2p2.udfcd.org/generator/