Flash Flood Prediction Program

-	Message 1's will continued valid until 8:00pm for the entire District.
-	Strong to severe thunderstorms that impacted the District earlier this afternoon have now moved east of the area. The airmass has stabilized for the time being, but if surface temperatures are able to warm sufficiently then additional thunderstorms would be possible.
-	Dewpoints remain in the upper 40s to low 50s late this afternoon, so if additional thunderstorms manage to develop then heavy rainfall will be possible. Storm chances will decrease this evening once the airmass stabilizes with the loss of daytime heating.

STORM RAINFALL POTENTIAL AND DURATION: Thunderstorms will be capable of producing rainfall amounts of 0.3-0.7" in 10-30 minutes.

WORST CASE SCENARIO: A strong or severe thunderstorm could produce up to 1.7" rainfall in 45-75 minutes.

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

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 800 PM SAT	0.1" (70%) to 0.3" (40%) to 0.7" (20%)	ISSUED
Arapahoe	Current TO 800 PM SAT	0.1" (70%) to 0.3" (40%) to 0.7" (20%)	ISSUED
Boulder	Current TO 800 PM SAT	0.1" (70%) to 0.3" (35%) to 0.7" (15%)	ISSUED
Broomfield	Current TO 800 PM SAT	0.1" (70%) to 0.3" (35%) to 0.7" (15%)	ISSUED
Denver	Current TO 800 PM SAT	0.1" (70%) to 0.3" (40%) to 0.7" (20%)	ISSUED
Douglas	Current TO 800 PM SAT	0.1" (70%) to 0.3" (40%) to 0.7" (20%)	ISSUED
Jefferson	Current TO 800 PM SAT	0.1" (70%) to 0.3" (40%) to 0.7" (20%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 800 PM SAT	0.1" (75%) to 0.3" (35%) to 0.7" (10%)	ISSUED
Douglas	Current TO 800 PM SAT	0.1" (80%) to 0.3" (35%) to 0.7" (10%)	ISSUED
Jefferson	Current TO 800 PM SAT	0.1" (80%) to 0.3" (35%) to 0.7" (10%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.