Flash Flood Prediction Program

-	Message 1's have been issued for the entire District and will be valid until 800pm this evening.
-	We are expecting one or two rounds of thunderstorms this afternoon, initiating across higher terrain during the early afternoon, moving across lower elevations mid to late afternoon. Prime time is between 3pm and 7pm, with a small chance an isolated storm or two is kicked up via outflow boundary from storms east of the District after 7pm.
-	Storm motions will be slower today; ESE at 10-15 mph. Thunderstorms will be capable of producing heavy rain. Briefly anchored or slower moving storms may create runoff or localized flooding. Due to recent rains, the ground is saturated in some areas, creating conditions for more rapid runoff across the District.

STORM RAINFALL POTENTIAL AND DURATION: Weak thunderstorms will produce 0.3-1.0" in 10-30 minutes. Moderate to strong thunderstorms will have the potential to produce 1.0-2.0" in 10-30 minutes.

WORST CASE SCENARIO: A strong anchored thunderstorm or a slower moving large thunderstorm may result in rainfall rates up to 3.0" in 45-75 minutes.

County	Message	Valid Times	Prime Time
Boulder County	1	100 PM TO 800 PM	130 PM TO 700 PM
Lakewood	1	100 PM TO 800 PM	130 PM TO 700 PM
Wheat Ridge	1	100 PM TO 800 PM	130 PM TO 700 PM
Arvada	1	100 PM TO 800 PM	130 PM TO 700 PM
the City of Aurora	1	100 PM TO 800 PM	130 PM TO 700 PM
Arapahoe County	1	100 PM TO 800 PM	130 PM TO 700 PM
DIA	1	100 PM TO 800 PM	130 PM TO 700 PM
Denver County	1	100 PM TO 800 PM	130 PM TO 700 PM
Adams County	1	100 PM TO 800 PM	130 PM TO 700 PM
Douglas County	1	100 PM TO 800 PM	130 PM TO 700 PM
Broomfield County	1	100 PM TO 800 PM	130 PM TO 700 PM
Jefferson County	1	100 PM TO 800 PM	130 PM TO 700 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 800 PM FRI	0.2" (60%) to 0.6" (30%) to 1.8" (15%)	ISSUED
Arapahoe	Current TO 800 PM FRI	0.2" (60%) to 0.6" (30%) to 1.8" (15%)	ISSUED
Boulder	Current TO 800 PM FRI	0.2" (60%) to 0.6" (30%) to 1.8" (15%)	ISSUED
Broomfield	Current TO 800 PM FRI	0.2" (60%) to 0.6" (30%) to 1.8" (15%)	ISSUED
Denver	Current TO 800 PM FRI	0.2" (60%) to 0.6" (30%) to 1.8" (15%)	ISSUED
Douglas	Current TO 800 PM FRI	0.2" (60%) to 0.6" (30%) to 1.8" (15%)	ISSUED
Jefferson	Current TO 800 PM FRI	0.2" (60%) to 0.6" (30%) to 1.8" (15%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 800 PM FRI	0.2" (80%) to 0.6" (40%) to 1.8" (20%)	ISSUED
Douglas	Current TO 800 PM FRI	0.2" (80%) to 0.6" (40%) to 1.8" (20%)	ISSUED
Jefferson	Current TO 800 PM FRI	0.2" (80%) to 0.6" (40%) to 1.8" (20%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.