Flash Flood Prediction Program

-	Message 1's have been issued for the entire District and will be valid until 8:00pm.
-	Thunderstorms have developed over portions of the District this afternoon and may become enhanced by a boundary moving in from the N increasing surface moisture. Strong thunderstorms will have the potential to produce brief heavy rainfall and large hail. Storms will be isolated in nature and not everyone will experience a storm today. Strongest storms will favor E areas of the District.
-	Storm motions are generally from W to E at around 10-15mph, but stronger storms may move more erratically. Best chances for thunderstorms will be through 7:00pm this evening.

STORM RAINFALL POTENTIAL AND DURATION: Moderate to strong thunderstorms will have the potential to produce 0.3-0.8" of rain in 10-30 mintues. Supplemental QPF is available at https://qpf.udfcd.org

WORST CASE SCENARIO: A large slower moving thunderstorm or training of thunderstorm cells may produce rainfall amounts of up to 1.6" in 45-60 minutes.

County	Message	Valid Times	Prime Time
Boulder County	1	Current TO 800 PM	Current TO 700 PM
Jefferson County	1	Current TO 800 PM	Current TO 700 PM
Broomfield County	1	Current TO 800 PM	Current TO 700 PM
Douglas County	1	Current TO 800 PM	Current TO 700 PM
Adams County	1	Current TO 800 PM	Current TO 700 PM
Denver County	1	Current TO 800 PM	Current TO 700 PM
DIA	1	Current TO 800 PM	Current TO 700 PM
Arapahoe County	1	Current TO 800 PM	Current TO 700 PM
the City of Aurora	1	Current TO 800 PM	Current TO 700 PM
Arvada	1	Current TO 800 PM	Current TO 700 PM
Wheat Ridge	1	Current TO 800 PM	Current TO 700 PM
Lakewood	1	Current TO 800 PM	Current 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" (75%) to 0.3" (50%) to 0.8" (15%)	ISSUED
Arapahoe	Current TO 800 PM WED	0.1" (75%) to 0.3" (50%) to 0.8" (15%)	ISSUED
Boulder	Current TO 800 PM WED	0.1" (75%) to 0.3" (50%) to 0.8" (15%)	ISSUED
Broomfield	Current TO 800 PM WED	0.1" (75%) to 0.3" (50%) to 0.8" (15%)	ISSUED
Denver	Current TO 800 PM WED	0.1" (75%) to 0.3" (50%) to 0.8" (15%)	ISSUED
Douglas	Current TO 800 PM WED	0.1" (60%) to 0.3" (40%) to 0.8" (10%)	ISSUED
Jefferson	Current TO 800 PM WED	0.1" (60%) to 0.3" (40%) to 0.8" (10%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 800 PM WED	0.1" (75%) to 0.3" (50%) to 0.8" (15%)	ISSUED
Douglas	Current TO 800 PM WED	0.1" (60%) to 0.3" (40%) to 0.8" (10%)	ISSUED
Jefferson	Current TO 800 PM WED	0.1" (60%) to 0.3" (40%) to 0.8" (10%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.