Flash Flood Prediction Program

-	Message 1's have been issued for the entire District and will be valid through 9:00 PM this evening.
-	Most of the thunderstorm activity today will be weak to moderate and pulse-type in nature, but outflow/gust front driven storms may become stationary and have the potential for a prolonged period of moderate to heavy rainfall.
-	Gust front/outflow driven storms will move very slowly or remain stationary with majority storms moving from W to E at around 10mph. Best chances for thunderstorm activity will be through sunset then conditions are expected to dry out.

STORM RAINFALL POTENTIAL AND DURATION: Moderate to strong thunderstorms will have the potential to produce 0.3-0.8" in 10-30 minutes.

WORST CASE SCENARIO: A strong stationary thunderstorm will have the potential to produce up to 1.4" in 30-60 minutes.

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	0.1" (90%) to 0.3" (60%) to 0.8" (35%)	ISSUED
Arapahoe	Current TO 900 PM FRI	0.1" (90%) to 0.3" (60%) to 0.8" (35%)	ISSUED
Boulder	Current TO 900 PM FRI	0.1" (90%) to 0.3" (60%) to 0.8" (30%)	ISSUED
Broomfield	Current TO 900 PM FRI	0.1" (90%) to 0.3" (60%) to 0.8" (30%)	ISSUED
Denver	Current TO 900 PM FRI	0.1" (90%) to 0.3" (60%) to 0.8" (35%)	ISSUED
Douglas	Current TO 900 PM FRI	0.1" (90%) to 0.3" (60%) to 0.8" (30%)	ISSUED
Jefferson	Current TO 900 PM FRI	0.1" (90%) to 0.3" (60%) to 0.8" (30%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 900 PM FRI	0.1" (90%) to 0.3" (60%) to 0.8" (30%)	ISSUED
Douglas	Current TO 900 PM FRI	0.1" (90%) to 0.3" (60%) to 0.8" (30%)	ISSUED
Jefferson	Current TO 900 PM FRI	0.1" (90%) to 0.3" (60%) to 0.8" (30%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.