Flash Flood Prediction Program

-	A gust front has initiated strong thunderstorm development for portions of the District.
-	Moderate to heavy rainfall is likely especially areas east of I25 at this time. Best chance for heavy rain will be from now until 9pm.
-	Rainfall rates between 0.2-0.4" already occurring with isolated heavier rainfall likely. These storms will continue over the next couple of hours as the move eastward.

STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers/isolated thunderstorms between a trace and 0.30". A moderate to strong thunderstorm could produce 0.30-0.0.60" in 10-30 minutes.

WORST CASE SCENARIO: A stronger slow moving thunderstorm has the potential to produce 0.6-1.6" in 45-75 minutes.

County	Message	Valid Times	Prime Time
Denver County	1	Current TO 900 PM	Current TO 800 PM
Adams County	1	Current TO 900 PM	Current TO 800 PM
Douglas County	1	Current TO 900 PM	Current TO 800 PM
Broomfield County	1	Current TO 900 PM	Current TO 800 PM
Jefferson County	1	Current TO 900 PM	Current TO 800 PM
Boulder 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 (75%) to 0.3" (40%) to 0.6" (30%)	ISSUED
Arapahoe	Current TO 900 PM FRI	Trace (75%) to 0.3" (40%) to 0.6" (30%)	ISSUED
Boulder	Current TO 900 PM FRI	Trace (75%) to 0.3" (40%) to 0.6" (30%)	ISSUED
Broomfield	Current TO 900 PM FRI	Trace (75%) to 0.3" (40%) to 0.6" (30%)	ISSUED
Denver	Current TO 900 PM FRI	Trace (75%) to 0.3" (40%) to 0.6" (30%)	ISSUED
Douglas	Current TO 900 PM FRI	Trace (75%) to 0.3" (40%) to 0.6" (30%)	ISSUED
Jefferson	Current TO 900 PM FRI	Trace (75%) to 0.3" (40%) to 0.6" (30%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 900 PM FRI	Trace (75%) to 0.3" (40%) to 0.6" (30%)	ISSUED
Douglas	Current TO 900 PM FRI	Trace (75%) to 0.3" (40%) to 0.6" (30%)	ISSUED
Jefferson	Current TO 900 PM FRI	Trace (75%) to 0.3" (40%) to 0.6" (30%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.