Flash Flood Prediction Program

-	Message 1's have been issued for the entire District, valid until 9:00pm this evening.
-	Showers and thunderstorms are currently developing over the mountains and foothills, ahead of an upper-level disturbance lifting N out of the Four Corners. Favorable ingredients exist today for strong to potentially-severe thunderstorms capable of heavy rainfall.
-	Thunderstorm activity is expected to come to an end early this evening, as drier air and subsidence push into Colorado behind the departing disturbance.

STORM RAINFALL POTENTIAL AND DURATION: Stronger thunderstorms may produce rainfall between 0.30-1.00" in 10-30 minutes.

WORST CASE SCENARIO: A strong to severe thunderstorm produces rainfall up to 2.50" in 60-90 minutes.

County	Message	Valid Times	Prime Time
Boulder County	1	Current TO 900 PM	100 PM TO 700 PM
Jefferson County	1	Current TO 900 PM	100 PM TO 700 PM
Broomfield County	1	Current TO 900 PM	100 PM TO 700 PM
Douglas County	1	Current TO 900 PM	100 PM TO 700 PM
Adams County	1	Current TO 900 PM	100 PM TO 700 PM
Denver County	1	Current TO 900 PM	100 PM TO 700 PM
DIA	1	Current TO 900 PM	100 PM TO 700 PM
Arapahoe County	1	Current TO 900 PM	100 PM TO 700 PM
the City of Aurora	1	Current TO 900 PM	100 PM TO 700 PM
Arvada	1	Current TO 900 PM	100 PM TO 700 PM
Wheat Ridge	1	Current TO 900 PM	100 PM TO 700 PM
Lakewood	1	Current TO 900 PM	100 PM TO 700 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 900 PM SUN	0.1" (80%) to 0.3" (60%) to 1.0" (25%)	ISSUED
Arapahoe	Current TO 900 PM SUN	0.1" (85%) to 0.3" (65%) to 1.0" (25%)	ISSUED
Boulder	Current TO 900 PM SUN	0.1" (75%) to 0.3" (50%) to 1.0" (15%)	ISSUED
Broomfield	Current TO 900 PM SUN	0.1" (75%) to 0.3" (50%) to 1.0" (15%)	ISSUED
Denver	Current TO 900 PM SUN	0.1" (75%) to 0.3" (50%) to 1.0" (15%)	ISSUED
Douglas	Current TO 900 PM SUN	0.1" (90%) to 0.3" (65%) to 1.0" (25%)	ISSUED
Jefferson	Current TO 900 PM SUN	0.1" (75%) to 0.3" (50%) to 1.0" (15%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 900 PM SUN	0.1" (80%) to 0.3" (60%) to 1.0" (25%)	ISSUED
Douglas	Current TO 900 PM SUN	0.1" (90%) to 0.3" (65%) to 1.0" (30%)	ISSUED
Jefferson	Current TO 900 PM SUN	0.1" (80%) to 0.3" (60%) to 1.0" (25%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.