Flash Flood Prediction Program

-	Message 1's have been issued for the entire District until 2:00am Tuesday.
-	A cold front moved through the District this evening and has triggered a round of moderate to strong thunderstorms. Although storms are moving relatively quickly to the N/NE at around 15-20mph, enough low level moisture is in place to result in a threat for brief heavy rainfall.
-	Storms capable of heavy rainfall will continue possible over the next couple of hours, before tapering off to lighter showers and weak thunderstorms for the remainder of the overnight period.

STORM RAINFALL POTENTIAL AND DURATION: Typical weak to moderate thunderstorms will produce rainfall of 0.1-0.3" in 10-30 minutes. Strong thunderstorms will be capable of producing heavy rainfall of 0.3-0.8" in 10-30 minutes.

WORST CASE SCENARIO: Training of thunderstorm cells results in heavy rainfall of up to 1.2" in 45-60 minutes.

County	Message	Valid Times	Prime Time
Jefferson County	1	Current TO 200 AM TUESDAY	Current TO 100 AM TUESDAY
Boulder County	1	Current TO 200 AM TUESDAY	Current TO 100 AM TUESDAY
Denver County	1	Current TO 200 AM TUESDAY	Current TO 100 AM TUESDAY
Adams County	1	Current TO 200 AM TUESDAY	Current TO 100 AM TUESDAY
Douglas County	1	Current TO 200 AM TUESDAY	Current TO 100 AM TUESDAY
Broomfield County	1	Current TO 200 AM TUESDAY	Current TO 100 AM TUESDAY
DIA	1	Current TO 200 AM TUESDAY	Current TO 100 AM TUESDAY
Arapahoe County	1	Current TO 200 AM TUESDAY	Current TO 100 AM TUESDAY
the City of Aurora	1	Current TO 200 AM TUESDAY	Current TO 100 AM TUESDAY
Arvada	1	Current TO 200 AM TUESDAY	Current TO 100 AM TUESDAY
Wheat Ridge	1	Current TO 200 AM TUESDAY	Current TO 100 AM TUESDAY
Lakewood	1	Current TO 200 AM TUESDAY	Current TO 100 AM TUESDAY

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 200 AM TUE	0.1" (100%) to 0.3" (60%) to 0.8" (25%)	ISSUED
Arapahoe	Current TO 200 AM TUE	0.1" (100%) to 0.3" (60%) to 0.8" (25%)	ISSUED
Boulder	Current TO 200 AM TUE	0.1" (90%) to 0.3" (50%) to 0.8" (20%)	ISSUED
Broomfield	Current TO 200 AM TUE	0.1" (90%) to 0.3" (50%) to 0.8" (20%)	ISSUED
Denver	Current TO 200 AM TUE	0.1" (100%) to 0.3" (60%) to 0.8" (25%)	ISSUED
Douglas	Current TO 200 AM TUE	0.1" (90%) to 0.3" (50%) to 0.8" (20%)	ISSUED
Jefferson	Current TO 200 AM TUE	0.1" (90%) to 0.3" (50%) to 0.8" (20%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 200 AM TUE	0.1" (90%) to 0.3" (40%) to 0.8" (15%)	ISSUED
Douglas	Current TO 200 AM TUE	0.1" (90%) to 0.3" (40%) to 0.8" (15%)	ISSUED
Jefferson	Current TO 200 AM TUE	0.1" (90%) to 0.3" (40%) to 0.8" (15%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.