Flash Flood Prediction Program

-	Message 1's will be allowed to expire at 9:00pm as the threat for heavy rainfall from thunderstorms has ended for the day.
-	A weak disturbance upstream is expected to produce additional widely scattered light rain showers through about midnight, likely favoring areas W of I-25 and over the foothills. Beyond midnight there could be a few lingering, isolated showers that persist into early Monday morning. Showers will move briskly from N to S at around 15mph. Although unlikely, if a weak thunderstorm were to develop it would be capable of producing brief heavy rainfall.
-	Due to all of the moisture as of late over large areas of the District it may not take much additional rain to produce runoff and smaller creeks and streams may be susceptible to higher flows into the evening.

STORM RAINFALL POTENTIAL AND DURATION: Rainfall rates from light rain showers will generally range from a trace to 0.2" in 30-60 minutes with moderate rain showers producing rainfall rates of 0.2-0.5" in 30-60 minutes.

WORST CASE SCENARIO: Weak to moderate thunderstorms are able to develop with the potential to produce brief heavy rainfall of 0.3-0.9" in 10-30 minutes.

County	Message	Valid Times	Prime Time
Denver County	1	Current TO 900 PM	Current TO 800 PM MONDAY
Adams County	1	Current TO 900 PM	Current TO 800 PM MONDAY
Douglas County	1	Current TO 900 PM	Current TO 800 PM MONDAY
Broomfield County	1	Current TO 900 PM	Current TO 800 PM MONDAY
Jefferson County	1	Current TO 900 PM	Current TO 800 PM MONDAY
Boulder County	1	Current TO 900 PM	Current TO 800 PM MONDAY
DIA	1	Current TO 900 PM	Current TO 800 PM MONDAY
Arapahoe County	1	Current TO 900 PM	Current TO 800 PM MONDAY
the City of Aurora	1	Current TO 900 PM	Current TO 800 PM MONDAY
Arvada	1	Current TO 900 PM	Current TO 800 PM MONDAY
Wheat Ridge	1	Current TO 900 PM	Current TO 800 PM MONDAY
Lakewood	1	Current TO 900 PM	Current TO 800 PM MONDAY

County-specific Quantitative Precipitation Outlook	Precipitation Time	60-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 400 AM MON	Trace (75%) to 0.2" (50%) to 0.5" (15%)	NONE
Arapahoe	Current TO 400 AM MON	Trace (75%) to 0.2" (50%) to 0.5" (15%)	NONE
Boulder	Current TO 400 AM MON	Trace (75%) to 0.2" (50%) to 0.5" (15%)	NONE
Broomfield	Current TO 400 AM MON	Trace (75%) to 0.2" (50%) to 0.5" (15%)	NONE
Denver	Current TO 400 AM MON	Trace (75%) to 0.2" (50%) to 0.5" (15%)	NONE
Douglas	Current TO 400 AM MON	Trace (75%) to 0.2" (50%) to 0.5" (15%)	NONE
Jefferson	Current TO 400 AM MON	Trace (75%) to 0.2" (50%) to 0.5" (15%)	NONE
Foothills above 6500ft
Boulder	Current TO 400 AM MON	Trace (95%) to 0.2" (60%) to 0.5" (20%)	NONE
Douglas	Current TO 400 AM MON	Trace (95%) to 0.2" (60%) to 0.4" (20%)	NONE
Jefferson	Current TO 400 AM MON	Trace (95%) to 0.2" (60%) to 0.4" (20%)	NONE

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.