Flash Flood Prediction Program

-	Message 1's will continue valid until 9:00pm although the threat for heavy rainfall is rapidly diminishing now that temperatures have cooled into the upper 60's to lower 70's.
-	The strongest storms of the day traversed from roughly Broomfield through Adams County between 5:30-7:00pm and generally produced 0.1-0.6" of rainfall in 10-30 minutes. A quiet period is expected over the next hour with another weaker wave of showers/thunderstorms W of the Continental Divide that is poised to produce additional shower activity this evening over the District.
-	With the cooler temperatures the incoming wave later this evening is expected to remain weak and produce a few scattered showers but an isolated thunderstorm cannot be ruled out and could produce brief moderate/heavy rain. A modest chance for shower activity will continue after Messages expire until midnight.

STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak thunderstorms will produce a trace to 0.2" of rain. Moderate to strong thunderstorms will produce 0.2-0.6" of rain in 10-30 minutes.

WORST CASE SCENARIO: Training of thunderstorm cells may result in up to 1.2" of rainfall in 30-60 minutes.

County	Message	Valid Times	Prime Time
Lakewood	1	Current TO 900 PM	Current TO 730 PM
Wheat Ridge	1	Current TO 900 PM	Current TO 730 PM
Arvada	1	Current TO 900 PM	Current TO 730 PM
the City of Aurora	1	Current TO 900 PM	Current TO 730 PM
Arapahoe County	1	Current TO 900 PM	Current TO 730 PM
DIA	1	Current TO 900 PM	Current TO 730 PM
Denver County	1	Current TO 900 PM	Current TO 730 PM
Adams County	1	Current TO 900 PM	Current TO 730 PM
Douglas County	1	Current TO 900 PM	Current TO 730 PM
Broomfield County	1	Current TO 900 PM	Current TO 730 PM
Jefferson County	1	Current TO 900 PM	Current TO 730 PM
Boulder County	1	Current TO 900 PM	Current TO 730 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 900 PM THU	Trace (80%) to 0.2" (40%) to 0.6" (10%)	ISSUED
Arapahoe	Current TO 900 PM THU	Trace (80%) to 0.2" (40%) to 0.6" (10%)	ISSUED
Boulder	Current TO 900 PM THU	Trace (80%) to 0.2" (40%) to 0.6" (10%)	ISSUED
Broomfield	Current TO 900 PM THU	Trace (80%) to 0.2" (40%) to 0.6" (10%)	ISSUED
Denver	Current TO 900 PM THU	Trace (80%) to 0.2" (40%) to 0.6" (10%)	ISSUED
Douglas	Current TO 900 PM THU	Trace (80%) to 0.2" (40%) to 0.6" (10%)	ISSUED
Jefferson	Current TO 900 PM THU	Trace (80%) to 0.2" (40%) to 0.6" (10%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 900 PM THU	Trace (80%) to 0.2" (40%) to 0.6" (10%)	ISSUED
Douglas	Current TO 900 PM THU	Trace (80%) to 0.2" (40%) to 0.6" (10%)	ISSUED
Jefferson	Current TO 900 PM THU	Trace (80%) to 0.2" (40%) to 0.6" (10%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.