Flash Flood Prediction Program

-	Message 1's have been issued for the entire District and will be valid until 900pm this evening.
-	Storms have started to initiate along an outflow boundary that moved in from the west. These storms are from DIA south through Aurora and towards Chatfield reservoir. These storms will likely stay stationary along the gust front and/or move slowly NNE around 5mph. This erratic and slow movement has increased the threat for moderate to brief heavy rain. Briefly anchored or slower moving storms may create runoff or localized flooding.
-	Storms continue to produce along the Continental Divide and have the potential to move into the the District through the rest of the evening. The storms could trigger additional outflow boundaries into this evening which could also produce additional rain showers/thunderstorms with moderate to heavy rainfall.

STORM RAINFALL POTENTIAL AND DURATION: Weak thunderstorms will produce TR-0.3" in 10-30 minutes. Moderate to strong thunderstorms will have the potential to produce 0.3-0.9" in 10-30 minutes.

WORST CASE SCENARIO: Strong thunderstorms anchor for an extended period of time or training of thunderstorm cells has the potential to produce up to 1.8" in 45-75 min.

County	Message	Valid Times	Prime Time
Boulder County	1	Current TO 900 PM	Current TO 800 PM
Jefferson County	1	Current TO 900 PM	Current TO 800 PM
Broomfield County	1	Current TO 900 PM	Current TO 800 PM
Douglas County	1	Current TO 900 PM	Current TO 800 PM
Adams County	1	Current TO 900 PM	Current TO 800 PM
Denver County	1	Current TO 900 PM	Current TO 800 PM
DIA	1	Current TO 900 PM	Current TO 800 PM
Arapahoe County	1	Current TO 900 PM	Current TO 800 PM
the City of Aurora	1	Current TO 900 PM	Current TO 800 PM
Arvada	1	Current TO 900 PM	Current TO 800 PM
Wheat Ridge	1	Current TO 900 PM	Current TO 800 PM
Lakewood	1	Current TO 900 PM	Current TO 800 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 900 PM FRI	Trace (50%) to 0.3" (25%) to 0.9" (15%)	ISSUED
Arapahoe	Current TO 900 PM FRI	Trace (50%) to 0.3" (25%) to 0.9" (15%)	ISSUED
Boulder	Current TO 900 PM FRI	Trace (50%) to 0.3" (25%) to 0.9" (10%)	ISSUED
Broomfield	Current TO 900 PM FRI	Trace (50%) to 0.3" (25%) to 0.9" (10%)	ISSUED
Denver	Current TO 900 PM FRI	Trace (50%) to 0.3" (25%) to 0.9" (10%)	ISSUED
Douglas	Current TO 900 PM FRI	Trace (50%) to 0.3" (25%) to 0.9" (10%)	ISSUED
Jefferson	Current TO 900 PM FRI	Trace (50%) to 0.3" (25%) to 0.9" (10%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 900 PM FRI	Trace (60%) to 0.3" (30%) to 0.9" (15%)	ISSUED
Douglas	Current TO 900 PM FRI	Trace (60%) to 0.3" (30%) to 0.9" (15%)	ISSUED
Jefferson	Current TO 900 PM FRI	Trace (60%) to 0.3" (30%) to 0.9" (15%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.