Flash Flood Prediction Program

Message 1’s will be allowed to expire at 9:00pm as the threat of heavy rainfall has ended for the day.

Additional rain showers and possibly a weak thunderstorm over the foothills will continue possible into the overnight period as an upper level low pressure system churns near the 4-Corners. Thunderstorms are not expected as temperatures are cooling and the atmosphere is becoming more stable. Chances for rain showers will persist past midnight with dry conditions expected by daybreak tomorrow.

More showers and thunderstorms are expected to develop on Friday with stronger storms having the potential to produce brief heavy rain and hail. Active weather pattern will continue over the upcoming weekend into early next week with below normal temperatures.

STORM RAINFALL POTENTIAL AND DURATION: Rain showers and possibly a weak thunderstorm will produce a trace to 0.3” of rain.

County	Message	Valid Times	Prime Time
Adams County	1	1200 PM TO 900 PM	100 PM TO 830 PM
Denver County	1	1200 PM TO 900 PM	100 PM TO 830 PM
DIA	1	1200 PM TO 900 PM	100 PM TO 830 PM
Arapahoe County	1	1200 PM TO 900 PM	100 PM TO 830 PM
the City of Aurora	1	1200 PM TO 900 PM	100 PM TO 830 PM
Arvada	1	1200 PM TO 900 PM	100 PM TO 830 PM
Wheat Ridge	1	1200 PM TO 900 PM	100 PM TO 830 PM
Broomfield County	1	1200 PM TO 900 PM	100 PM TO 830 PM
Lakewood	1	1200 PM TO 900 PM	100 PM TO 830 PM
Douglas County	1	1200 PM TO 900 PM	100 PM TO 830 PM
Jefferson County	1	1200 PM TO 900 PM	100 PM TO 830 PM
Boulder County	1	1200 PM TO 900 PM	100 PM TO 830 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 400 AM FRI	Trace (80%) to 0.1" (40%) to 0.3" (15%)	ISSUED
Arapahoe	Current TO 400 AM FRI	Trace (80%) to 0.1" (40%) to 0.3" (15%)	ISSUED
Boulder	Current TO 400 AM FRI	Trace (80%) to 0.1" (40%) to 0.3" (15%)	ISSUED
Broomfield	Current TO 400 AM FRI	Trace (80%) to 0.1" (40%) to 0.3" (15%)	ISSUED
Denver	Current TO 400 AM FRI	Trace (80%) to 0.1" (40%) to 0.3" (15%)	ISSUED
Douglas	Current TO 400 AM FRI	Trace (90%) to 0.1" (50%) to 0.3" (15%)	ISSUED
Jefferson	Current TO 400 AM FRI	Trace (80%) to 0.1" (40%) to 0.3" (15%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 400 AM FRI	Trace (80%) to 0.1" (40%) to 0.3" (15%)	ISSUED
Douglas	Current TO 400 AM FRI	Trace (90%) to 0.1" (60%) to 0.3" (20%)	ISSUED
Jefferson	Current TO 400 AM FRI	Trace (80%) to 0.1" (40%) to 0.3" (15%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.