Flash Flood Prediction Program

-	Message 1's have been issued for the eintire District and will be valid through 7pm.
-	A line of strong thunderstorms will move through the District over the coming hours producing gusty winds, brief heavy rainfall and possibly large hail. Fast storm motions from SSW to NNE at around 50mph will help to reduce point rainfall amounts from a single storm with training of thunderstorm cells potentially producing a longer period of moderate to heavy rain that may lead to excessive runoff.
-	Once this line of storms move through conditions will quickly dry out by 7pm this evening.

STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak to moderate thunderstorms will produce a trace to 0.3" of rain in 10-20 minutes. Strong thunderstorms will have the potential to produce 0.3-0.8" in 10-20 minutes.

WORST CASE SCENARIO: Training of strong thunderstorm cells may result in up to 1.5" of rain in 60 minutes or less.

County	Message	Valid Times	Prime Time
Wheat Ridge	1	Current TO 700 PM	330 PM TO 600 PM
Arvada	1	Current TO 700 PM	330 PM TO 600 PM
the City of Aurora	1	Current TO 700 PM	330 PM TO 600 PM
Arapahoe County	1	Current TO 700 PM	330 PM TO 600 PM
DIA	1	Current TO 700 PM	330 PM TO 600 PM
Denver County	1	Current TO 700 PM	330 PM TO 600 PM
Adams County	1	Current TO 700 PM	330 PM TO 600 PM
Douglas County	1	Current TO 700 PM	330 PM TO 600 PM
Broomfield County	1	Current TO 700 PM	330 PM TO 600 PM
Boulder County	1	Current TO 700 PM	330 PM TO 600 PM
Jefferson County	1	Current TO 700 PM	330 PM TO 600 PM
Lakewood	1	Current TO 700 PM	330 PM TO 600 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	20-Minute Rainfall and % Probability	Message Potential
Plains
Adams	330 PM TO 700 PM	0.1" (95%) to 0.3" (75%) to 0.8" (25%)	ISSUED
Arapahoe	330 PM TO 700 PM	0.1" (95%) to 0.3" (75%) to 0.8" (25%)	ISSUED
Boulder	330 PM TO 700 PM	0.1" (95%) to 0.3" (75%) to 0.8" (25%)	ISSUED
Broomfield	330 PM TO 700 PM	0.1" (95%) to 0.3" (75%) to 0.8" (25%)	ISSUED
Denver	330 PM TO 700 PM	0.1" (95%) to 0.3" (75%) to 0.8" (25%)	ISSUED
Douglas	330 PM TO 700 PM	0.1" (95%) to 0.3" (75%) to 0.8" (25%)	ISSUED
Jefferson	330 PM TO 700 PM	0.1" (95%) to 0.3" (75%) to 0.8" (25%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 700 PM SAT	0.1" (95%) to 0.3" (75%) to 0.8" (25%)	ISSUED
Douglas	Current TO 700 PM SAT	0.1" (95%) to 0.3" (75%) to 0.8" (25%)	ISSUED
Jefferson	Current TO 700 PM SAT	0.1" (95%) to 0.3" (75%) to 0.8" (25%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.