Flash Flood Prediction Program

-	Message 1's issued for the entire District will be allowed to expire at 11:00pm, as the threat for heavy rainfall has come to an end.
-	Thunderstorms producing moderate to heavy rainfall impacted much of the District this afternoon and early evening. Weak energy aloft will continue to stream across NE Colorado this evening, which will maintain the threat for showers and isolated thunderstorms into the overnight hours.
-	Additional showers and thunderstorms are expected to remain weak to briefly moderate, but measurable rainfall is likely underneath stronger cells due to elevated moisture levels and weak steering flow. Any lingering shower and storm activity should diminish by 3:00am, if not before.

STORM RAINFALL POTENTIAL AND DURATION: Showers and thunderstorms will produce rainfall amounts between 0.05-0.35" in 10-30 minutes.

WORST CASE SCENARIO: An isolated, slower-moving thunderstorm produces up to 0.70" rainfall in 40-70 minutes.

County	Message	Valid Times	Prime Time
Boulder County	1	Current TO 1100 PM	Current TO 1100 PM
Jefferson County	1	Current TO 1100 PM	Current TO 1100 PM
Broomfield County	1	Current TO 1100 PM	Current TO 1100 PM
Douglas County	1	Current TO 1100 PM	Current TO 1100 PM
Adams County	1	Current TO 1100 PM	Current TO 1100 PM
Denver County	1	Current TO 1100 PM	Current TO 1100 PM
DIA	1	Current TO 1100 PM	Current TO 1100 PM
Arapahoe County	1	Current TO 1100 PM	Current TO 1100 PM
the City of Aurora	1	Current TO 1100 PM	Current TO 1100 PM
Arvada	1	Current TO 1100 PM	Current TO 1100 PM
Wheat Ridge	1	Current TO 1100 PM	Current TO 1100 PM
Lakewood	1	Current TO 1100 PM	Current TO 1100 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 300 AM TUE	0.1" (70%) to 0.2" (50%) to 0.4" (20%)	ISSUED
Arapahoe	Current TO 300 AM TUE	0.1" (60%) to 0.2" (40%) to 0.4" (10%)	ISSUED
Boulder	Current TO 300 AM TUE	0.1" (75%) to 0.2" (55%) to 0.4" (25%)	ISSUED
Broomfield	Current TO 300 AM TUE	0.1" (70%) to 0.2" (50%) to 0.4" (20%)	ISSUED
Denver	Current TO 300 AM TUE	0.1" (65%) to 0.2" (45%) to 0.4" (15%)	ISSUED
Douglas	Current TO 300 AM TUE	0.1" (60%) to 0.2" (40%) to 0.4" (10%)	ISSUED
Jefferson	Current TO 300 AM TUE	0.1" (65%) to 0.2" (45%) to 0.4" (15%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 300 AM TUE	0.1" (75%) to 0.2" (55%) to 0.4" (25%)	ISSUED
Douglas	Current TO 300 AM TUE	0.1" (70%) to 0.2" (50%) to 0.4" (20%)	ISSUED
Jefferson	Current TO 300 AM TUE	0.1" (70%) to 0.2" (50%) to 0.4" (20%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.