Flash Flood Prediction Program

-	Messages will be allowed to expire at 9pm as the threat for heavy rainfall from thunderstorms has diminished.
-	Rain showers/isolated thunderstorms will continue to move out from the NW to SE with a few lingering rain showers and perhaps an isolated thunderstorm possible over the next few hours before conditions completely dry out for the overnight period.
-	On Saturday surface moisture is expected to decrease resulting in a lower threat for thunderstorms with a lower threat for heavy rainfall. There will still be a modest chance for thunderstorms Saturday afternoon and early evening and it might not take as much rainfall to produce runoff as many areas today experienced between 0.5-1.5" of rain under the stronger storms.

STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak thunderstorms will produce a trace to 0.10".

WORST CASE SCENARIO: A moderate to strong thunderstorm is able to develop resulting in rainfall rates of 0.2-0.6" in 10-30 minutes.

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

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 1159 PM FRI	Trace (30%) to 0.1" (10%) to 0.2" (5%)	ISSUED
Arapahoe	Current TO 1159 PM FRI	Trace (80%) to 0.1" (60%) to 0.2" (30%)	ISSUED
Boulder	Current TO 1159 PM FRI	Trace (30%) to 0.1" (10%) to 0.2" (5%)	ISSUED
Broomfield	Current TO 1159 PM FRI	Trace (30%) to 0.1" (10%) to 0.2" (5%)	ISSUED
Denver	Current TO 1159 PM FRI	Trace (70%) to 0.1" (50%) to 0.2" (15%)	ISSUED
Douglas	Current TO 1159 PM FRI	Trace (100%) to 0.1" (75%) to 0.2" (50%)	ISSUED
Jefferson	Current TO 1159 PM FRI	Trace (40%) to 0.1" (20%) to 0.2" (10%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 1159 PM FRI	Trace (30%) to 0.1" (10%) to 0.2" (5%)	ISSUED
Douglas	Current TO 1159 PM FRI	Trace (100%) to 0.1" (75%) to 0.2" (50%)	ISSUED
Jefferson	Current TO 1159 PM FRI	Trace (50%) to 0.1" (30%) to 0.2" (15%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.