Flash Flood Prediction Program

Message 1’s will be allowed to expire at 10:00 PM as the threat of heavy rainfall has come to an end.

Several strong thunderstorms have affected areas south of the District, creating an environment over the District that inhibits any strong thunderstorms from forming. Some lingering showers persist for portions of the District at this time and will likely leave in the hour or two. There will be a slight chance for off and on showers and possibly a weak thunderstorm or two later this evening.

The best chance for additional showers will be possible through the overnight hours with on and off showers continuing into the morning. Overnight temperatures will drop into the low 60s for the plains with mid to upper 50s along the foothills.

Tomorrow will bring showers and isolated thunderstorms in the morning hours, with precipitation chances ending by the early to mid afternoon. Rainfall looks to remain light throughout tomorrow.

STORM RAINFALL POTENTIAL AND DURATION: Typical showers will produce a trace to 0.10" total in 10-30 minutes. A moderate to strong shower/thunderstorm will produce 0.10-0.25" total in 10-30 minutes.

WORST CASE SCENARIO: If a stationary, strong thunderstorm is produced it will have the potential to have between 0.25-0.50" total in 30-60 minutes.

County	Message	Valid Times	Prime Time
Lakewood	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
the City of Aurora	1	Current TO 1000 PM	Current TO 930 PM
Arapahoe County	1	Current TO 1000 PM	Current TO 930 PM
DIA	1	Current TO 1000 PM	Current TO 930 PM
Denver County	1	Current TO 1000 PM	Current TO 930 PM
Adams County	1	Current TO 1000 PM	Current TO 930 PM
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

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

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.