Flash Flood Prediction Program

Message 1’s will be allowed to expire at 10pm as the threat of heavy rain has come to an end.

After a couple of strong storms moved on the edges of the District, a few lingering showers remained. These showers will continue to move SE over the next couple of hours before skies clear through the overnight and into Tuesday. Overnight lows will drop into mid to upper 50s. Dry conditions are expected tomorrow with high temperatures in the 80s under mostly sunny skies.

STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers will produce a trace to 0.20” total, in 10 to 30 minutes. A moderate showers/thunderstorm will produce 0.20” to 0.40” total, in 10 to 30 minutes.

WORST CASE SCENARIO: A strong, stalled thunderstorm has the potential to produce 0.40” to 0.80” in under 60 minutes.

County	Message	Valid Times	Prime Time
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
Adams County	1	Current TO 1000 PM	Current TO 930 PM
Denver County	1	Current TO 1000 PM	Current TO 930 PM
DIA	1	Current TO 1000 PM	Current TO 930 PM
Arapahoe County	1	Current TO 1000 PM	Current TO 930 PM
the City of Aurora	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
Lakewood	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 1159 PM MON	Trace (10%) to 0.2" (5%) to 0.4" (0%)	NONE
Arapahoe	Current TO 1159 PM MON	Trace (20%) to 0.2" (10%) to 0.4" (5%)	NONE
Boulder	Current TO 1159 PM MON	Trace (10%) to 0.2" (5%) to 0.4" (0%)	NONE
Broomfield	Current TO 1159 PM MON	Trace (10%) to 0.2" (5%) to 0.4" (0%)	NONE
Denver	Current TO 1159 PM MON	Trace (20%) to 0.2" (10%) to 0.4" (5%)	NONE
Douglas	Current TO 1159 PM MON	Trace (30%) to 0.2" (15%) to 0.4" (10%)	NONE
Jefferson	Current TO 1159 PM MON	Trace (10%) to 0.2" (5%) to 0.4" (0%)	NONE
Foothills above 6500ft
Boulder	Current TO 1159 PM MON	Trace (10%) to 0.2" (5%) to 0.4" (0%)	NONE
Douglas	Current TO 1159 PM MON	Trace (30%) to 0.2" (15%) to 0.4" (10%)	NONE
Jefferson	Current TO 1159 PM MON	Trace (10%) to 0.2" (5%) to 0.4" (0%)	NONE

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.