Flash Flood Prediction Program

-	Message 1's continue valid for Adams, Arapahoe, Denver, Douglas and Jefferson Counties until 8:30 PM.
-	Isolated weak to moderate thunderstorms have develop along a wind convergence line that extended from Douglas County northeastward into Arapahoe and Adams Counties. These initial storms has produced a weak outflow boundary pushing back to the west and has initiated a weak storm over Denver and additional storms may develop into the evening.
-	Most storms will be weak but a moderate to briefly strong thunderstorm will be capable of producing heavy rainfall. Best chances for thunderstorms will be over the next 60-90 minutes and Message 1's are expected to be allowed to expire this evening.

STORM RAINFALL POTENTIAL AND DURATION: Weak thunderstorms will produce 0.1-0.3" in 10-30 minutes. Moderate to strong thunderstorms will be capable of producing heavy rainfall rates of 0.3-0.8" in 10-30 minutes.

WORST CASE SCENARIO: A nearly stationary strong thunderstorm will have the potential to produce up to 1.5" of rain in 45-60 minutes.

County	Message	Valid Times	Prime Time
Lakewood	1	100 PM TO 830 PM	200 PM TO 730 PM
Wheat Ridge	1	100 PM TO 830 PM	200 PM TO 730 PM
Arvada	1	100 PM TO 830 PM	200 PM TO 730 PM
Jefferson County	1	100 PM TO 830 PM	200 PM TO 730 PM
the City of Aurora	1	100 PM TO 830 PM	200 PM TO 730 PM
Arapahoe County	1	100 PM TO 830 PM	200 PM TO 730 PM
DIA	1	100 PM TO 830 PM	200 PM TO 730 PM
Denver County	1	100 PM TO 830 PM	200 PM TO 730 PM
Adams County	1	100 PM TO 830 PM	200 PM TO 730 PM
Douglas County	1	100 PM TO 830 PM	200 PM TO 730 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 830 PM MON	Trace (50%) to 0.3" (20%) to 0.8" (5%)	ISSUED
Arapahoe	Current TO 830 PM MON	Trace (60%) to 0.3" (30%) to 0.8" (10%)	ISSUED
Boulder	Current TO 830 PM MON	Trace (50%) to 0.3" (20%) to 0.8" (5%)	LOW
Broomfield	Current TO 830 PM MON	Trace (50%) to 0.3" (20%) to 0.8" (5%)	LOW
Denver	Current TO 830 PM MON	Trace (75%) to 0.3" (40%) to 0.8" (15%)	ISSUED
Douglas	Current TO 830 PM MON	Trace (75%) to 0.3" (40%) to 0.9" (15%)	ISSUED
Jefferson	Current TO 830 PM MON	Trace (60%) to 0.3" (30%) to 0.9" (10%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 830 PM MON	Trace (60%) to 0.3" (30%) to 0.8" (10%)	LOW
Douglas	Current TO 830 PM MON	Trace (60%) to 0.3" (30%) to 0.8" (10%)	ISSUED
Jefferson	Current TO 830 PM MON	Trace (60%) to 0.3" (30%) to 0.8" (10%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.