Flash Flood Prediction Program

-	Messages have been issued for the entire District until 10:00pm.
-	Storms have began to form over the foothills and will remain anchored to the higher terrain at this time. Due to slow/nearly stationary movement, there will be a threat for heavy rainfall across the higher elevations over the next couple of hours before storms eventually move east over the lower elevations of the District.
-	Moisture remains elevated across the District behind a cold front this morning with dewpoints in the upper 50s to low 60s. Storm movement will be slow and erratic at times as storms form along outflow boundaries, which will result in a threat for heavy rainfall. Additionally, storms today have a good chance to become severe as they move onto the plains bringing strong winds, large hail and heavy rain. The threat for storms will persist into the evening hours before activity gradually diminishes by late evening.

STORM RAINFALL POTENTIAL AND DURATION: Thunderstorms will be capable of producing rainfall amounts of 0.5-1.5" in 10-30 minutes.

WORST CASE SCENARIO: A strong thunderstorm stalls along an outflow or wind convergence boundary and produces heavy rainfall of up to 3.0" in 90-120 minutes.

County	Message	Valid Times	Prime Time
Boulder County	1	Current TO 1000 PM	Current TO 900 PM
Jefferson County	1	Current TO 1000 PM	Current TO 900 PM
Broomfield County	1	Current TO 1000 PM	Current TO 900 PM
Douglas County	1	Current TO 1000 PM	Current TO 900 PM
Adams County	1	Current TO 1000 PM	Current TO 900 PM
Denver County	1	Current TO 1000 PM	Current TO 900 PM
DIA	1	Current TO 1000 PM	Current TO 900 PM
Arapahoe County	1	Current TO 1000 PM	Current TO 900 PM
the City of Aurora	1	Current TO 1000 PM	Current TO 900 PM
Arvada	1	Current TO 1000 PM	Current TO 900 PM
Wheat Ridge	1	Current TO 1000 PM	Current TO 900 PM
Lakewood	1	Current TO 1000 PM	Current TO 900 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 1000 PM SAT	0.1" (90%) to 0.5" (50%) to 1.5" (20%)	ISSUED
Arapahoe	Current TO 1000 PM SAT	0.1" (90%) to 0.5" (50%) to 1.5" (20%)	ISSUED
Boulder	Current TO 1000 PM SAT	0.1" (90%) to 0.5" (50%) to 1.5" (20%)	ISSUED
Broomfield	Current TO 1000 PM SAT	0.1" (90%) to 0.5" (50%) to 1.5" (20%)	ISSUED
Denver	Current TO 1000 PM SAT	0.1" (90%) to 0.5" (50%) to 1.5" (20%)	ISSUED
Douglas	Current TO 1000 PM SAT	0.1" (90%) to 0.5" (50%) to 1.5" (20%)	ISSUED
Jefferson	Current TO 1000 PM SAT	0.1" (90%) to 0.5" (50%) to 1.5" (20%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 1000 PM SAT	0.1" (90%) to 0.5" (40%) to 1.5" (10%)	ISSUED
Douglas	Current TO 1000 PM SAT	0.1" (90%) to 0.5" (40%) to 1.5" (10%)	ISSUED
Jefferson	Current TO 1000 PM SAT	0.1" (90%) to 0.5" (40%) to 1.5" (10%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.