Flash Flood Prediction Program

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

After the two waves of storms moved through the District, the threat for Message level rainfall has significantly diminished. Heavy precipitation will struggle to develop for the next several hours due to the cooler temperatures over the District. A few isolated showers/thunderstorms persist over portions of the District and should weaken as they move east/southeast and out of the District.

Temperatures overnight will decrease into the low to mid 60s for the plains with upper 50s to around 60 degrees along the foothills. Similar conditions will remain in place for tomorrow with another good chance for widespread afternoon and evening showers/thunderstorms. An abundance of available moisture, both aloft and now at the surface will result in moderate to heavy rainfall out of any storms that are able to develop.

STORM RAINFALL POTENTIAL AND DURATION: Weak showers will produce a trace to 0.20” total in 10-30 minutes.

WORST CASE SCENARIO: A stronger shower/thunderstorm will have the potential to produce 0.20-0.40” total in 10-30 minutes.

County	Message	Valid Times	Prime Time
Lakewood	1	Current TO 1000 PM	Current TO 1000 PM
Wheat Ridge	1	Current TO 1000 PM	Current TO 1000 PM
Arvada	1	Current TO 1000 PM	Current TO 1000 PM
the City of Aurora	1	Current TO 1000 PM	Current TO 1000 PM
Arapahoe County	1	Current TO 1000 PM	Current TO 1000 PM
DIA	1	Current TO 1000 PM	Current TO 1000 PM
Adams County	1	Current TO 1000 PM	Current TO 1000 PM
Denver County	1	Current TO 1000 PM	Current TO 1000 PM
Douglas County	1	Current TO 1000 PM	Current TO 1000 PM
Broomfield County	1	Current TO 1000 PM	Current TO 1000 PM
Jefferson County	1	Current TO 1000 PM	Current TO 1000 PM
Boulder County	1	Current TO 1000 PM	Current TO 1000 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 1159 PM TUE	Trace (30%) to 0.2" (20%) to 0.4" (10%)	NONE
Arapahoe	Current TO 1159 PM TUE	Trace (30%) to 0.2" (20%) to 0.4" (10%)	NONE
Boulder	Current TO 1159 PM TUE	Trace (30%) to 0.2" (20%) to 0.4" (10%)	NONE
Broomfield	Current TO 1159 PM TUE	Trace (30%) to 0.2" (20%) to 0.4" (10%)	NONE
Denver	Current TO 1159 PM TUE	Trace (30%) to 0.2" (20%) to 0.4" (10%)	NONE
Douglas	Current TO 1159 PM TUE	Trace (30%) to 0.2" (20%) to 0.4" (10%)	NONE
Jefferson	Current TO 1159 PM TUE	Trace (30%) to 0.2" (20%) to 0.4" (10%)	NONE
Foothills above 6500ft
Boulder	Current TO 1159 PM TUE	Trace (30%) to 0.2" (20%) to 0.4" (10%)	NONE
Douglas	Current TO 1159 PM TUE	Trace (30%) to 0.2" (20%) to 0.4" (10%)	NONE
Jefferson	Current TO 1159 PM TUE	Trace (30%) to 0.2" (20%) to 0.4" (10%)	NONE

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.