Flash Flood Prediction Program

-	Message 1's will be allowed to expire at 9:00 PM as the threat for heavy rainfall has ended for the day. Additional rain showers and weak thunderstorms will remain possible until around midnight.
-	Strong thunderstorm activity has diminished over the past few hours with isolated light rain showers and weak thunderstorms remaining over portions of the District at this time. These showers and isolated weak thunderstorms will continue to progress eastward with conditions drying out through midnight. Additional light rain showers may re-develop overnight into early Sunday morning as a cold front moves through.
-	An abundance of moisture will be in place tomorrow (Sunday) and will result in a threat for thunderstorms that will be very capable of producing heavy rainfall during the afternoon and evening. Thunderstorm strength will depend upon daytime heating and more sunshine early in the day will likely equate to stronger storms in the afternoon. Areas that experienced heavy rainfall today may not take as much rain tomorrow to produce runoff.

STORM RAINFALL POTENTIAL AND DURATION: Rain showers and isolated weak thunderstorms will produce a trace to 0.3" in 10-30 minutes.

WORST CASE SCENARIO: A briefly moderate thunderstorm is able to develop with the potential to produce rainfall rates of 0.3-0.7" in 10-30 minutes.

County	Message	Valid Times	Prime Time
the City of Aurora	1	200 PM TO 900 PM	300 PM TO 900 PM
Arapahoe County	1	200 PM TO 900 PM	300 PM TO 900 PM
DIA	1	200 PM TO 900 PM	300 PM TO 900 PM
Denver County	1	200 PM TO 900 PM	300 PM TO 900 PM
Adams County	1	200 PM TO 900 PM	300 PM TO 900 PM
Douglas County	1	200 PM TO 900 PM	300 PM TO 900 PM
Broomfield County	1	200 PM TO 900 PM	300 PM TO 900 PM
Jefferson County	1	200 PM TO 900 PM	300 PM TO 900 PM
Boulder County	1	200 PM TO 900 PM	300 PM TO 900 PM
Arvada	1	200 PM TO 900 PM	300 PM TO 900 PM
Wheat Ridge	1	200 PM TO 900 PM	300 PM TO 900 PM
Lakewood	1	200 PM TO 900 PM	300 PM TO 900 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 1159 PM SAT	Trace (80%) to 0.1" (50%) to 0.3" (20%)	ISSUED
Arapahoe	Current TO 1159 PM SAT	Trace (90%) to 0.1" (60%) to 0.3" (25%)	ISSUED
Boulder	Current TO 1159 PM SAT	Trace (60%) to 0.1" (30%) to 0.3" (10%)	ISSUED
Broomfield	Current TO 1159 PM SAT	Trace (60%) to 0.1" (30%) to 0.3" (10%)	ISSUED
Denver	Current TO 1159 PM SAT	Trace (90%) to 0.1" (60%) to 0.3" (25%)	ISSUED
Douglas	Current TO 1159 PM SAT	Trace (80%) to 0.1" (50%) to 0.3" (20%)	ISSUED
Jefferson	Current TO 1159 PM SAT	Trace (75%) to 0.1" (50%) to 0.3" (15%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 1159 PM SAT	Trace (60%) to 0.1" (30%) to 0.3" (10%)	ISSUED
Douglas	Current TO 1159 PM SAT	Trace (80%) to 0.1" (50%) to 0.3" (20%)	ISSUED
Jefferson	Current TO 1159 PM SAT	Trace (75%) to 0.1" (50%) to 0.3" (15%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.