Flash Flood Prediction Program

-	Message 1's have been issued for the entire until 8:00pm.
-	Thunderstorms have developed over the foothills and eastern portions of the Palmer Divide, and are showing a strengthening trend at this time. Dewpoints are in the mid to upper 40s across most of the District, which will result in a heavy rainfall threat under stronger storms.
-	Storm motions are to the E/NE at around 12-17mph. The best chance of heavy rainfall producing thunderstorms will occur through mid to late afternoon, before tapering off to more isolated storms by early evening.

STORM RAINFALL POTENTIAL AND DURATION: Weak to moderate thunderstorms will produce rainfall amounts of 0.05-0.3" in 10-30 minutes. Strong thunderstorms will be capable of producing rainfall amounts of 0.3-0.8" in 10-30 minutes.

WORST CASE SCENARIO: A cluster of strong, slow-moving thunderstorms could produce heavy rainfall of up to 1.8" in 60-90 minutes.

County	Message	Valid Times	Prime Time
Boulder County	1	Current TO 800 PM	Current TO 600 PM
Jefferson County	1	Current TO 800 PM	Current TO 600 PM
Broomfield County	1	Current TO 800 PM	Current TO 600 PM
Douglas County	1	Current TO 800 PM	Current TO 600 PM
Adams County	1	Current TO 800 PM	Current TO 600 PM
Denver County	1	Current TO 800 PM	Current TO 600 PM
DIA	1	Current TO 800 PM	Current TO 600 PM
Arapahoe County	1	Current TO 800 PM	Current TO 600 PM
the City of Aurora	1	Current TO 800 PM	Current TO 600 PM
Arvada	1	Current TO 800 PM	Current TO 600 PM
Wheat Ridge	1	Current TO 800 PM	Current TO 600 PM
Lakewood	1	Current TO 800 PM	Current TO 600 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 800 PM MON	0.1" (90%) to 0.3" (50%) to 0.8" (25%)	ISSUED
Arapahoe	Current TO 800 PM MON	0.1" (90%) to 0.3" (50%) to 0.8" (25%)	ISSUED
Boulder	Current TO 800 PM MON	0.1" (90%) to 0.3" (50%) to 0.8" (25%)	ISSUED
Broomfield	Current TO 800 PM MON	0.1" (90%) to 0.3" (50%) to 0.8" (25%)	ISSUED
Denver	Current TO 800 PM MON	0.1" (90%) to 0.3" (50%) to 0.8" (25%)	ISSUED
Douglas	Current TO 800 PM MON	0.1" (90%) to 0.3" (50%) to 0.8" (25%)	ISSUED
Jefferson	Current TO 800 PM MON	0.1" (90%) to 0.3" (50%) to 0.8" (25%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 800 PM MON	0.1" (95%) to 0.3" (50%) to 0.8" (25%)	ISSUED
Douglas	Current TO 800 PM MON	0.1" (95%) to 0.3" (50%) to 0.8" (25%)	ISSUED
Jefferson	Current TO 800 PM MON	0.1" (95%) to 0.3" (50%) to 0.8" (25%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.