Flash Flood Prediction Program

-	Message 1's issued for the entire District will be allowed to expire at 8pm, as the threat for heavy rainfall has come to an end.
-	Upper-air observations tonight show remaining convective instability capped by a low-level warm layer just above the surface. With the loss of daytime heating and lack of upper-level support, any additional showers and thunderstorms should remain weak to briefly moderate.
-	Additional isolated showers and thunderstorms will trot to the ENE at around 15-20mph, with a few high/mid-level clouds expected this evening and overnight. Any remaining storm activity should be well E of the District by about 9pm.

STORM RAINFALL POTENTIAL AND DURATION: Showers and thunderstorms will produce rainfall amounts of trace-0.30" in 10-30 minutes.

WORST CASE SCENARIO: A stronger thunderstorm produces up to 0.70" rainfall in 45-75 minutes.

County	Message	Valid Times	Prime Time
Boulder County	1	Current TO 800 PM	Current TO 800 PM
Jefferson County	1	Current TO 800 PM	Current TO 800 PM
Broomfield County	1	Current TO 800 PM	Current TO 800 PM
Douglas County	1	Current TO 800 PM	Current TO 800 PM
Adams County	1	Current TO 800 PM	Current TO 800 PM
Denver County	1	Current TO 800 PM	Current TO 800 PM
DIA	1	Current TO 800 PM	Current TO 800 PM
Arapahoe County	1	Current TO 800 PM	Current TO 800 PM
the City of Aurora	1	Current TO 800 PM	Current TO 800 PM
Arvada	1	Current TO 800 PM	Current TO 800 PM
Wheat Ridge	1	Current TO 800 PM	Current TO 800 PM
Lakewood	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 900 PM MON	Trace (50%) to 0.1" (30%) to 0.3" (5%)	ISSUED
Arapahoe	Current TO 900 PM MON	Trace (50%) to 0.1" (30%) to 0.3" (5%)	ISSUED
Boulder	Current TO 900 PM MON	Trace (50%) to 0.1" (30%) to 0.3" (5%)	ISSUED
Broomfield	Current TO 900 PM MON	Trace (50%) to 0.1" (30%) to 0.3" (5%)	ISSUED
Denver	Current TO 900 PM MON	Trace (50%) to 0.1" (30%) to 0.3" (5%)	ISSUED
Douglas	Current TO 900 PM MON	Trace (50%) to 0.1" (30%) to 0.3" (5%)	ISSUED
Jefferson	Current TO 900 PM MON	Trace (50%) to 0.1" (30%) to 0.3" (5%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 900 PM MON	Trace (60%) to 0.1" (40%) to 0.3" (10%)	ISSUED
Douglas	Current TO 900 PM MON	Trace (60%) to 0.1" (40%) to 0.3" (10%)	ISSUED
Jefferson	Current TO 900 PM MON	Trace (60%) to 0.1" (40%) to 0.3" (10%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.