Flash Flood Prediction Program

-	Message 1's have been extended until 11:00pm for Denver and Adams Counties only, and will be allowed to expire for the remainder of the District at 10:00pm.
-	A line of thunderstorms developed along an outflow boundary across Adams County and near DIA, and continues to persist at this time. This line of storms has weakened some and should gradually dissipate and move out of the District in the next hour, but brief heavy rainfall cannot be ruled out in the meantime if cells within this line briefly pulse up.
-	Isolated showers and weak thunderstorms are possible across the remainder of the District, but only light rainfall is expected outside of Denver and Adams Counties for the rest of the evening.

STORM RAINFALL POTENTIAL AND DURATION: Thunderstorms will be capable of producing rainfall of 0.3-0.9" in 10-30 minutes.

WORST CASE SCENARIO: Training of thunderstorm cells results in rainfall of up to 1.4" in 30-60 minutes.

County	Message	Valid Times	Prime Time
Boulder County	1	Current TO 1000 PM	Current TO 1000 PM
Jefferson County	1	Current TO 1000 PM	Current TO 1000 PM
Broomfield County	1	Current TO 1000 PM	Current TO 1000 PM
Douglas County	1	Current TO 1000 PM	Current TO 1000 PM
Adams County	1	Current TO 1100 PM	Current TO 1100 PM
Denver County	1	Current TO 1100 PM	Current TO 1100 PM
DIA	1	Current TO 1100 PM	Current TO 1100 PM
Arapahoe County	1	Current TO 1000 PM	Current TO 1000 PM
the City of Aurora	1	Current TO 1000 PM	Current TO 1000 PM
Arvada	1	Current TO 1000 PM	Current TO 1000 PM
Wheat Ridge	1	Current TO 1000 PM	Current TO 1000 PM
Lakewood	1	Current TO 1000 PM	Current TO 1000 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 1100 PM SUN	Trace (100%) to 0.3" (50%) to 0.9" (20%)	ISSUED
Arapahoe	Current TO 1100 PM SUN	Trace (80%) to 0.1" (40%) to 0.5" (10%)	ISSUED
Boulder	Current TO 1100 PM SUN	Trace (80%) to 0.1" (40%) to 0.5" (10%)	ISSUED
Broomfield	Current TO 1100 PM SUN	Trace (80%) to 0.1" (40%) to 0.5" (10%)	ISSUED
Denver	Current TO 1100 PM SUN	Trace (95%) to 0.3" (45%) to 0.9" (15%)	ISSUED
Douglas	Current TO 1100 PM SUN	Trace (70%) to 0.1" (30%) to 0.5" (10%)	ISSUED
Jefferson	Current TO 1100 PM SUN	Trace (80%) to 0.1" (40%) to 0.5" (10%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 1100 PM SUN	Trace (80%) to 0.1" (40%) to 0.5" (10%)	ISSUED
Douglas	Current TO 1100 PM SUN	Trace (80%) to 0.1" (40%) to 0.5" (10%)	ISSUED
Jefferson	Current TO 1100 PM SUN	Trace (80%) to 0.1" (40%) to 0.5" (10%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.