Flash Flood Prediction Program

-	Message 1's will continue valid for the entire District until 8:30pm although the threat for heavy rainfall is decreasing as time wears on.
-	The outflow boundary that had the potential to produce thunderstorms with heavy rainfall only resulted in weak to briefly moderate thunderstorm activity over the District. Stronger storms have developed south along this same boundary but no longer poses a threat locally. Another boundary is currently moving through the District and is not producing any meaningful storm activity and this trend is expected to continue.
-	Most of the shower and any thunderstorm activity is expected to remain over the higher terrain and south of the District into the evening, however if a thunderstorm is able to develop over the plains it would be capable of producing briefly heavy rain.

STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak thunderstorms will produce a trace to 0.2" of rain. Moderate to strong thunderstorms will have the potential to produce 0.3-0.8" in 10-30 minutes.

WORST CASE SCENARIO: A stationary strong thunderstorm may result in up to 1.6" in 45-60 minutes.

County	Message	Valid Times	Prime Time
Wheat Ridge	1	Current TO 830 PM	300 PM TO 730 PM
Lakewood	1	Current TO 830 PM	300 PM TO 730 PM
Arvada	1	Current TO 830 PM	300 PM TO 730 PM
the City of Aurora	1	Current TO 830 PM	300 PM TO 730 PM
DIA	1	Current TO 830 PM	300 PM TO 730 PM
Arapahoe County	1	Current TO 830 PM	300 PM TO 730 PM
Denver County	1	Current TO 830 PM	300 PM TO 730 PM
Douglas County	1	Current TO 830 PM	300 PM TO 730 PM
Adams County	1	Current TO 830 PM	300 PM TO 730 PM
Broomfield County	1	Current TO 830 PM	300 PM TO 730 PM
Jefferson County	1	Current TO 830 PM	300 PM TO 730 PM
Boulder County	1	Current TO 830 PM	300 PM TO 730 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 830 PM SAT	Trace (40%) to 0.2" (20%) to 0.8" (10%)	ISSUED
Arapahoe	Current TO 830 PM SAT	Trace (40%) to 0.2" (20%) to 0.8" (10%)	ISSUED
Boulder	Current TO 830 PM SAT	Trace (60%) to 0.2" (30%) to 0.8" (10%)	ISSUED
Broomfield	Current TO 830 PM SAT	Trace (40%) to 0.2" (20%) to 0.8" (10%)	ISSUED
Denver	Current TO 830 PM SAT	Trace (40%) to 0.2" (20%) to 0.8" (10%)	ISSUED
Douglas	Current TO 830 PM SAT	Trace (60%) to 0.2" (30%) to 0.8" (10%)	ISSUED
Jefferson	Current TO 830 PM SAT	Trace (60%) to 0.2" (30%) to 0.8" (10%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 830 PM SAT	Trace (80%) to 0.2" (50%) to 0.8" (15%)	ISSUED
Douglas	Current TO 830 PM SAT	Trace (80%) to 0.2" (50%) to 0.8" (15%)	ISSUED
Jefferson	Current TO 830 PM SAT	Trace (80%) to 0.2" (50%) to 0.8" (15%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.