Flash Flood Prediction Program

-	Message 1's continue valid until 9:00pm as the potential for heavy rainfall continues into the evening.
-	We are reaching the back end of prime time for storms with a final round or two of showers and weak to moderate thunderstorms expected over the next couple hours. Showers and thunderstorms will generally propagate from W to E at 10-15mph.
-	Strong thunderstorms are less likely now that temperatures have cooled into the 70's but even moderate storms will be capable of producing brief heavy rainfall.

STORM RAINFALL POTENTIAL AND DURATION: Rain showers will produce a trace to 0.2" in 10-30 minutes. Weak to moderate thunderstorms will produce rainfall rates of 0.3-0.9" in 10-30 minutes. Strong thunderstorms will have the potential to produce 0.5-1.5" in 10-30 minutes.

WORST CASE SCENARIO: A large thunderstorm complex or a slow moving large thunderstorm may result in up to 2.5" of rain in 45-75 minutes.

County	Message	Valid Times	Prime Time
Boulder County	1	1100 AM TO 900 PM	1200 PM TO 800 PM
Jefferson County	1	1100 AM TO 900 PM	1200 PM TO 800 PM
Broomfield County	1	1100 AM TO 900 PM	1200 PM TO 800 PM
Douglas County	1	1100 AM TO 900 PM	1200 PM TO 800 PM
Adams County	1	1100 AM TO 900 PM	1200 PM TO 800 PM
Denver County	1	1100 AM TO 900 PM	1200 PM TO 800 PM
DIA	1	1100 AM TO 900 PM	1200 PM TO 800 PM
Arapahoe County	1	1100 AM TO 900 PM	1200 PM TO 800 PM
the City of Aurora	1	1100 AM TO 900 PM	1200 PM TO 800 PM
Arvada	1	1100 AM TO 900 PM	1200 PM TO 800 PM
Wheat Ridge	1	1100 AM TO 900 PM	1200 PM TO 800 PM
Lakewood	1	1100 AM TO 900 PM	1200 PM TO 800 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 900 PM WED	0.1" (90%) to 0.3" (60%) to 0.9" (30%)	ISSUED
Arapahoe	Current TO 900 PM WED	0.1" (90%) to 0.3" (60%) to 0.9" (20%)	ISSUED
Boulder	Current TO 900 PM WED	0.1" (90%) to 0.3" (60%) to 0.9" (15%)	ISSUED
Broomfield	Current TO 900 PM WED	0.1" (90%) to 0.3" (60%) to 0.9" (15%)	ISSUED
Denver	Current TO 900 PM WED	0.1" (90%) to 0.3" (60%) to 0.9" (20%)	ISSUED
Douglas	Current TO 900 PM WED	0.1" (90%) to 0.3" (60%) to 0.9" (20%)	ISSUED
Jefferson	Current TO 900 PM WED	0.1" (90%) to 0.3" (60%) to 0.9" (20%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 900 PM WED	0.1" (90%) to 0.3" (60%) to 0.9" (15%)	ISSUED
Douglas	Current TO 900 PM WED	0.1" (90%) to 0.3" (60%) to 0.9" (15%)	ISSUED
Jefferson	Current TO 900 PM WED	0.1" (90%) to 0.3" (60%) to 0.9" (15%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.