Flash Flood Prediction Program

-	Message 1's will be allowed to expire at 10:00pm as the threat for heavy rainfall 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 the overnight. Showers will move from W to E between 5-10mph. Although unlikely, if a weak thunderstorm were to develop it would be capable of producing brief moderate to heavy rainfall.
-	Overnight lows will drop into the mid to upper 50's with a few lingering rain showers likely out on the eastern plains through daybreak Thursday. Storm chances increase tomorrow with another good chance for heavy rainfall as an abundance of moisture remains in place along with slow to nearly stationary storm movements.

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
Boulder County	1	Current TO 1000 PM	Current TO 930 PM
Jefferson County	1	Current TO 1000 PM	Current TO 930 PM
Broomfield County	1	Current TO 1000 PM	Current TO 930 PM
Douglas County	1	Current TO 1000 PM	Current TO 930 PM
Adams County	1	Current TO 1000 PM	Current TO 930 PM
Denver County	1	Current TO 1000 PM	Current TO 930 PM
DIA	1	Current TO 1000 PM	Current TO 930 PM
Arapahoe County	1	Current TO 1000 PM	Current TO 930 PM
the City of Aurora	1	Current TO 1000 PM	Current TO 930 PM
Arvada	1	Current TO 1000 PM	Current TO 930 PM
Wheat Ridge	1	Current TO 1000 PM	Current TO 930 PM
Lakewood	1	Current TO 1000 PM	Current TO 930 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 600 AM THU	Trace (40%) to 0.2" (20%) to 0.5" (5%)	NONE
Arapahoe	Current TO 600 AM THU	Trace (40%) to 0.2" (20%) to 0.5" (5%)	NONE
Boulder	Current TO 600 AM THU	Trace (40%) to 0.2" (20%) to 0.5" (5%)	NONE
Broomfield	Current TO 600 AM THU	Trace (40%) to 0.2" (20%) to 0.5" (5%)	NONE
Denver	Current TO 600 AM THU	Trace (40%) to 0.2" (20%) to 0.5" (5%)	NONE
Douglas	Current TO 600 AM THU	Trace (40%) to 0.2" (20%) to 0.5" (5%)	NONE
Jefferson	Current TO 600 AM THU	Trace (40%) to 0.2" (20%) to 0.5" (5%)	NONE
Foothills above 6500ft
Boulder	Current TO 600 AM THU	Trace (50%) to 0.2" (25%) to 0.5" (10%)	LOW
Douglas	Current TO 600 AM THU	Trace (50%) to 0.2" (25%) to 0.5" (10%)	LOW
Jefferson	Current TO 600 AM THU	Trace (50%) to 0.2" (25%) to 0.5" (10%)	LOW

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.