Flash Flood Prediction Program

-	Message 1's have been issued for the entire District and will be valid until 10:00 PM this evening.
-	Scattered to numerous rain showers and thunderstorms will move through the District through the afternoon and evening. Moderate to strong thunderstorms will be capable of producing heavy rainfall which may lead to excessive runoff and possibly flash flooding.
-	Storms will move fairly slowly from W/SW to E/NE at 5-10 mph which will increase the chance for moderate to heavy rainfall. Training of thunderstorm cells or a large slower moving thunderstorm will be the main culprits today for extended periods of heavy rainfall.

STORM RAINFALL POTENTIAL AND DURATION: Moderate to strong thunderstorms will produce 0.3-0.7" of rain in 10-30 minutes.

WORST CASE SCENARIO: Training of thunderstorm cells or a large slower moving thunderstorm may produce up to 1.6" in 60-90 minutes.

County	Message	Valid Times	Prime Time
the City of Aurora	1	Current TO 1000 PM	Current TO 800 PM
Wheat Ridge	1	Current TO 1000 PM	Current TO 800 PM
Lakewood	1	Current TO 1000 PM	Current TO 800 PM
Arvada	1	Current TO 1000 PM	Current TO 800 PM
Arapahoe County	1	Current TO 1000 PM	Current TO 800 PM
DIA	1	Current TO 1000 PM	Current TO 800 PM
Adams County	1	Current TO 1000 PM	Current TO 800 PM
Denver County	1	Current TO 1000 PM	Current TO 800 PM
Douglas County	1	Current TO 1000 PM	Current TO 800 PM
Boulder County	1	Current TO 1000 PM	Current TO 800 PM
Jefferson County	1	Current TO 1000 PM	Current TO 800 PM
Broomfield County	1	Current TO 1000 PM	Current TO 800 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 1000 PM SUN	Trace (80%) to 0.3" (40%) to 0.7" (20%)	ISSUED
Arapahoe	Current TO 1000 PM SUN	Trace (80%) to 0.3" (40%) to 0.7" (20%)	ISSUED
Boulder	Current TO 1000 PM SUN	Trace (80%) to 0.3" (40%) to 0.7" (20%)	ISSUED
Broomfield	Current TO 1000 PM SUN	Trace (80%) to 0.3" (40%) to 0.7" (20%)	ISSUED
Denver	Current TO 1000 PM SUN	Trace (80%) to 0.3" (40%) to 0.7" (20%)	ISSUED
Douglas	Current TO 1000 PM SUN	Trace (80%) to 0.3" (40%) to 0.7" (20%)	ISSUED
Jefferson	Current TO 1000 PM SUN	Trace (80%) to 0.3" (40%) to 0.7" (20%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 1000 PM SUN	Trace (80%) to 0.3" (40%) to 0.7" (20%)	ISSUED
Douglas	Current TO 1000 PM SUN	Trace (80%) to 0.3" (40%) to 0.7" (20%)	ISSUED
Jefferson	Current TO 1000 PM SUN	Trace (80%) to 0.3" (40%) to 0.7" (20%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.