Flash Flood Prediction Program

-	Message 1's have been issued for the entire District and will be valid until 8:00pm this evening.
-	An outflow boundary from storms to the S of the District is progressing northward through the District at this time and may act to energize and slow down or briefly anchor storms that are moving into the District from the NW. Stronger thunderstorms will have the potential to produce brief heavy rainfall that may lead to excessive runoff roadways.
-	Typical thunderstorms will move form WNW to ESE at 15-20mph. 1-2 rounds of thunderstorms is expected through 7 or 8pm. After 8pm the stronger storms are expected to have moved east of the District.

STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak thunderstorms will produce a trace to 0.2" of moisture. Moderate thunderstorms will have the potential to produce rainfall rates of 0.4-1.0" in 10-30 minutes.

WORST CASE SCENARIO: A slower moving thunderstorm or briefly anchored thunderstorm will have the potential to produce up to 1.4" of heavy rain in 45-60 minutes.

County	Message	Valid Times	Prime Time
Arapahoe County	1	Current TO 800 PM	Current TO 700 PM
Denver County	1	Current TO 800 PM	500 PM TO 700 PM
DIA	1	Current TO 800 PM	500 PM TO 700 PM
Douglas County	1	Current TO 800 PM	Current TO 700 PM
Adams County	1	Current TO 800 PM	500 PM TO 700 PM
Broomfield County	1	Current TO 800 PM	500 PM TO 700 PM
Jefferson County	1	Current TO 800 PM	Current TO 700 PM
Boulder County	1	Current TO 800 PM	Current TO 700 PM
the City of Aurora	1	Current TO 800 PM	500 PM TO 700 PM
Arvada	1	Current TO 800 PM	500 PM TO 700 PM
Wheat Ridge	1	Current TO 800 PM	500 PM TO 700 PM
Lakewood	1	Current TO 800 PM	500 PM TO 700 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 800 PM WED	0.1" (90%) to 0.4" (60%) to 1.0" (20%)	ISSUED
Arapahoe	Current TO 800 PM WED	0.1" (90%) to 0.4" (60%) to 1.0" (20%)	ISSUED
Boulder	Current TO 800 PM WED	0.1" (90%) to 0.4" (60%) to 1.0" (20%)	ISSUED
Broomfield	Current TO 800 PM WED	0.1" (90%) to 0.4" (60%) to 1.0" (20%)	ISSUED
Denver	Current TO 800 PM WED	0.1" (90%) to 0.4" (60%) to 1.0" (20%)	ISSUED
Douglas	Current TO 800 PM WED	0.1" (90%) to 0.4" (60%) to 1.0" (20%)	ISSUED
Jefferson	Current TO 800 PM WED	0.1" (90%) to 0.4" (60%) to 1.0" (20%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 800 PM WED	0.1" (100%) to 0.4" (65%) to 1.0" (20%)	ISSUED
Douglas	Current TO 800 PM WED	0.1" (95%) to 0.4" (60%) to 1.0" (20%)	ISSUED
Jefferson	Current TO 800 PM WED	0.1" (100%) to 0.4" (65%) to 1.0" (25%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.