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 upper level energy will pass overhead this evening and overnight and will likely keep a few isolated rain showers and weak thunderstorms going into the early am hours on Wednesday. With temperatures now cooling into the 60's the threat for heavy rainfall from surface based convection has ended with light to briefly moderate rain expected from here on out.
-	Best chances for additional showers and weak to possibly moderate thunderstorms will be through 2:00 am Wednesday. Tomorrow is expected to feature a moderate to high risk for thunderstorms with the potential for heavy rainfall as low level moisture will remain in place.

STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak thunderstorms will produce a trace to 0.2" in 10-30 minutes. A moderate thunderstorm will have the potential to produce 0.2-0.4" in 10-30 minutes.

WORST CASE SCENARIO: A strong thunderstorm is able to develop with the potential for 0.3-0.8" of rain in 10-30 minutes.

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

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 200 AM WED	Trace (75%) to 0.1" (50%) to 0.4" (10%)	ISSUED
Arapahoe	Current TO 200 AM WED	Trace (75%) to 0.1" (50%) to 0.4" (10%)	ISSUED
Boulder	Current TO 200 AM WED	Trace (75%) to 0.1" (50%) to 0.4" (10%)	ISSUED
Broomfield	Current TO 200 AM WED	Trace (75%) to 0.1" (50%) to 0.4" (10%)	ISSUED
Denver	Current TO 200 AM WED	Trace (75%) to 0.1" (50%) to 0.4" (10%)	ISSUED
Douglas	Current TO 200 AM WED	Trace (75%) to 0.1" (50%) to 0.4" (10%)	ISSUED
Jefferson	Current TO 200 AM WED	Trace (75%) to 0.1" (50%) to 0.4" (10%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 200 AM WED	Trace (75%) to 0.1" (50%) to 0.4" (10%)	ISSUED
Douglas	Current TO 200 AM WED	Trace (75%) to 0.1" (50%) to 0.4" (10%)	ISSUED
Jefferson	Current TO 200 AM WED	Trace (75%) to 0.1" (50%) to 0.4" (10%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.